US2394390A - Typewriting machine - Google Patents

Description

YIIIIIIIIIIIA VIIIIIIIIIIIIIIIIIII Feb. 5, i946. M, H MANN 2,394,390 c TYPEWRITING MACHINE Filed Dec. 3l, 1941 8 Sheets-Sheet 1 l n l n i g n,

Z 1 l lNvENToR MILES H. MANN Feb. 5, 1946. M MANN v 2,394,390.

TYPEWRITING MACHINE A:med Dec. s1. 1941 a sheets-sheet 2 lNvENToR l* MlLEs HMANN I ATTORNEY Feb. 5, 1946. M, H. MANN 2,394,390

TYPEWRITING MACHINE Filed Dec. :51, 1941 e sheets-sheet s 'BY (j l lATTORNEY Feb. 5, 1946. M. H; MANN'l 2,394,390

TYPEWRITING MACHINE Filed Dec. 31, 1941 8 Sheets-Sheet 4 INVENTOR M LES H. M A N N ATTORNEY Feb. 5, 1946. M. H. MANN 2,394,390

TYPEWRIIINGl MACHINE Filed Dec. 31, 1941 8 Sheets-Sheet 5 INVENTOR l MILES H MANN ATTORNEY Feb..5, 1946.. M. H. MANN 2,394,390

TYPEWRITING MACHINE Filed Dec. 3l, 1941 8 Sheets-Sheet 6 INVENTOR Mugs |-LMANN ATTORNEY Feb. 5, 1946. M. H. MANN 2,394,390

TYPEWRITING MACHINE Filed Dec. 31. 1941 s sheets-Sheet '7 vll/lllllll//l//l//ll/l/lA INVENTOR rvnLEsA H. MANN ATTORNEY Feb. 5, 1946. M. H.- MANN v 2,394,390 y TYPWRITING MACHINE v Filed Dec. 31, 1941 8 sheets-sheet 8 l INVENTOR Ml LES H. MANN BY/f ATTORNEY Patented Feb. 5, 1946 UNITED STATESA PATENT oli-*FICE Miles H". Mann, West Hartford,Conm,.assignor,to` Undrwoodcorporation, a corp'oraltbn'of D'ela- Ware Application December 31, 1941Serialloi425g109" 24' Claims.

This invention relates totypewritingmachinesand more particularly'to'. such ma'ohinesrin which? the work sheetsV aresupported upon av substan` tially at platen.. Certain features oi theinvention are. particularly adapted to be embodied irrA flat. platen typewriting machinesl of theY Elliott- Fisher` type comprising" a' substantially horizontal flat platen andv type: bar' actuatingmechanism in which eachltypeis projectedv downwardly during. its operating-1. stroke and moves in al direction substantially perpendicular to thework supporting surfaceot the, platen adjacent. the"r end of said stroke.

InA typewriting machines of the Elliott: Fisher' type having types of! different case; type heads each havingdiiferentlcasetypes mounted thereon are'usually. pvoted on certain of! theltypebars andaV type shifting. disclis arranged to be moved? byf'a,suitablerkeyinto. and" out of position to beengaged by an' arm on the. type head during the g actuatingstrok of a type bar to shiftsaid head; such machine'sgof which applicant is-informed.; the construction has been such that the'upper' case types have engaged the worki sheets'with substantially: the same. forcef as the lower'v casetypes.

One:v obiectl ofv thepresentl invention is' to improvethe construction. andzmo'de of operationoftheV case shift` mechanism for flat platen` typewritingv machines: and toVV produce aV machine; in; which, with substantiallyuniform type bar actua;-4 tion's; the forcewlith` whichthe' types engage the: work sheets.` in lower: andi upperv easel positions: of said-mechanisms may2 be? relatively' varied...A

Another? obect' of the invention isi to provide machines ofthi's class with a-novelaind improvedf type. bar' and caseA shift'v mechanism in which the typ'e'barsare supported on a2 type bar segment mountedfor movement-toshift case.

notkierv object of-'the` invention isf-to produce aA type bar mechanism-iV for fiatrpla'ten machines in-Vwhich the type barsf are supported on a-typey segment'V mountedl for movement to shift case' and'- havi'ng anovel type bar actuating mechanismY whereby` substantially uniform actuationsf ofv a: type bar mechanism -wil1 cause the types to engageY the workv with the required force whether the supporting segmentisrin lower case orf inf-upper' case-position. y

Another object ofthe invention is; to provide type-writing machinesi off the flat platen typev with novelmechanism forst-lifting thetypeE bar mechanisms from lower to upper caser positions bypower and forV also shifting said mechanisms by power backto lower caseposition's;

Another' object' of theA invention, isl to" producel improved; type'- bar' mechanism' for flat` platen machines" comprising ashiftabletype bar seg'.- ment upon'which-thetype bars arepivoted 'where--v byrespectively upon; the depression: and uponv 60 the release of a shift'keyf, theitypebarisegment" locked? against rebound when retracted' to starting position and; in w-liichthe several' type bars, are mounted upon a typeib'arl segment arranged' tol bel` shifted from one position to another to shift' case;

With the above andV other objects in viewH the' invention consists inl a4 machine embodying the novel and improvedV features', constructions and combinations of parts hereinafter described'` and particularly pointed out; in the claims', the ad',-

vantagespf'which will? be readily"understood*and appreciated by-those slill'edlin the 'art'. v

various features of* the invention will" be clearlyl understood from the accompanying drawings illustrating a; machine embodying; the,

invention in its preferred form and the following detailedl description o'fA the' constructions therei'nshown.

Inithe drawings:

Figi. 11 is a; View in vertical sectionthrough' the type: carriage off a t'ypewritingl machine of. the socalled Elliott Fisher typeA embodying the invent'ion, with certain portions broken away andV illustratingf'tlietype bar mechanism or type actionV corresponding to one of' the central type bars of the segmental groupv ofin type bars' with the parts in lowerca'sepositionsand with the type barfretr'acte'd,` Y

Fig; 2"isal d'etaiil view`invertical section illustrating. a type' bar' mechanisml corresponding to" artyp/ebar at one" end of the segmental group of type'r bars with the'Jpa-rts in lower case positions andi withftheftype ba-r retracted,

Fig.l 3T is'va- .detail view invertical section illustrating the type bar mechanism shown in Fig; 1i withf' the partsv inupper-'case positions and the type ba'rretracted,

Fig. 4f is al detail planl view illustrating the tylpe `b'ar` mechanisms-shown in' Figs; 1 and' 2 with the parts--` inf-lowercasepositions and with the typebar's'advancedl into positions to engage one of the types of each bar witli theJwork,

Fig'. 5i is` a-view smila-rto Fig. 35 illustrating the-v type bar'f mechanismA shown inY Fig; 3i withr theparts inilower case` positions and the typev baradvancedintoposition to engage one of' the types thereon withv ther` work,

6 is-a View similarto'Fig; 5fillustratingthe same@ type barmechanism with the'parts Vin up`- per c'asepositions and also'with'- the typebar' adwnicedV intoA position toengageone of the types thereonfwith the work'.

Fig. 7 isa detail plan view illustrating the shiftable type segment for supporting theshiftable, parts ofv thetype actions-and certa'iiij ass,ociatedV parts, v

Fig. 8 is a detail view in side elevation, with certain parts in section, illustrating particularly the shiftable segment for the type actions and the mechanism for shifting the same,

Fig. 9 is a view in front elevation partly broken away and partly in section illustrating' certain,

parts of the mechanism shown in Fig. 8,

I4 is provided with a series of radially arranged slctsl in which are pivoted ,uponfamarcuately bent pivot rod It; passing;tlirjoughI Y i ongues 2B betweenthe slots, aseries of "type bars or levers 22.k The center of the arc of the pivot rod V8 and the corresponding arc of the segmental plate i4 is located adjacentthe typing point and Fig. 10 is a detail view illustrating, inside elevation, parts of the mechanism shown in Fig. ,8, Fig. 11 is a detail View in front elevation, illustrating the mechanism shown in Fig. V10 and certain associated parts, i Y

Fig. 12 is a detail View in side elevation with certain parts in section, illustrating a portion Vof thev mechanism -shovvnrin Fig. ,8 withV certain of the parts in different positions,

Fig. 13 is a detail view in sideelevation illustrating certain parts of theY driving mechanism,

Figs. 14, 15, 16 and 17 are diagrammatic views illustrating the modevof operationof different Vforms of the type bar mechanismV inupper and lower case positions, and l i Y i i y Fig. '18 is a View in side elevation illustrating a modied form of type bar mechanism corresponding to one of the central typebars of the segmental group of type bars.

The invention is shown in this application as embodiedV in a typewriting .machine of the socalled Elliott FisherV type having its parts constructed and arranged, except Yfor the typebar and case shift mechanisms,substantially as illustrated and described in the co-pending appli-.-

cation of Oscar J. Su'ndstrand, Serial No. 281,772,

No; 2,370,505'February 2 7, 1945,! Y Y This vmachine comprises a rectangular platen frame (not shown), a substantially flat platen 2 mounted for vertical movement in said frame,

dated June 29, 1939 which maturedmas Patent Ya line space frame mounted on the side bars or rails of the platen frame for forward and rearward'movement overthe platen and having front and -rear rails .4 and 6,* and a type carriage 8 mounted for lateral movement overthe platen 2 by meansof front andrear sets of rollers Il) and lzarranged .to engage Vsaid' rails.

The type carriage carries a series of `type bars and operating mechanism therefor in which each type bar is mounted upon the type carriagefand actuated to project the same dovvnwardlyinto engagement with a work sheet supported on the platen, each type carried by the type bar moving substantially perpendicular to the platen adjacent the end ofitstype impression stroke. In

the construction illustrated, power operated mechanism is provided for actuatingithe type bars.' The principal features cf the case shift mechanism, however, are not limited to a Vmachine inlwhich the type bars are actuatedby power but may, be embodied withadvantage in machines in which thetype barsv are actuated byV wana buaer 1|.u By' tnelaction cfthe's'prings s1- and lla'together` with thecooperating spring ofVv preferably/'slightly to the rear thereof when the Vtype bar segment is in lower case`position. Each of the type bars V22 preferably consists of a relatively thin sheet metal plate, stamped or cut to the form shown in Fig. 1 and having a type head 24 provided with one or more types arranged to engage the work sheet supported on the platen 2. The segmental plate I4"preferably.-.c'on'sists of a casting made of :some light .metaljsuchas aluminum or an aluminum alloy..; i

Thetype segment comprisesv a support 26 Valso preferably consisting ,of a castingof some light metal such as aluminum or aluminum alloy, and

this support is provided With an arcuate portionr 28, the arc of which is. substantially parallel with the arc of the pivot rod l8and that of the seg.-v

mental plate I4 and said support is formedwith aseries of radial slots 36 arranged respectively opposite the slots I6 in the segmental plate I4, said support 26 being located a substantial .diss tance above, the arcuate plate I 4 as clearlyV shown in the drawings. in the support 28` are pivoted a series of levers.

32 upon an arcuate pivotrod 34 passing through'.

the tonguesV 36 locatedbetween said slots, the arc cf this rod being substantially parallelrwith the arc of the pivot rodA I8. Each ofthe bell crank levers 32 is connected by a link'38fwith a'projecting'tail vportionfllil formed on each of the type bars.

The support 260i the vtype bar segment4 is` formed with a bar-like portion 42 preferably ini-j tegral with the arcuate portion 28 and extends ing rectilinearly across the segment. 'I'his barlike portion 42 is formed withaseries of substan-` tially parallel slots 44 in which respectively are pivoted a series of bell crank levers 46 upona rectilinear pivot rod 48 passing through the tongues 5 0 between the slots 44. The'axisof this rod is substantially Darallel'with aline tangent tothe axis of rod 34. These levers 46 are respectively connected by means'of links 52 with the bellcrank levers 32.'` The arcuate `portion 28 and thelbarlike portion 42 withthe pivot Vrods 34 and 48 pass ing thro-ugh the same are arranged above the segmental plate I4 as shown inFigs. 1, 2,y 5 and 6.Y g The bell crank levers Y46 are connected respectively by means cf links 5,4 VWththe bell cranklevers 56 pivoted upon a rectilinear pivot rod 5 8`v supported in the frame of the type Vcarriage and extending across the same substantially Yparallel with rod 48 considerably above. the type balises:-NVV ment. 'Ihebellcrank 56 isprovidedewith a slot,

66 in which engages aroll 62 xecl toa relatively long intermediate leverf64'pivoted-at itsrear endV upona rectilinear pivot rod 66 extending across thetype carriage substantially parallel withrod 48 and supported on the frame ofthe carriage,

theselevers 64 beingsubstantially,paralleldwith each other.

The beu crank iversz lis acted uponA tiza-coiled spring 61 which tends to swing the same down-j wardlyabout its pivot to retract the 'type bar. 'Ifo the lever 64 is connected a coiled spring 69a whichV tends to swing the same upwardlyand tormainrtain the forward end ofthe leveri'nY Aengagement Within the respective slots 3D.

ageo'egeeo the power drivenfmechanismfor lactuating vthe lever llill, leach type bar mechanismv is restored to retracted position after a type impression stroke.

The-segmental plate I4 andthe support26 are secured together in the relation .shown'inplan in Figf'l and 'in cross section in'Fig. l, bymeans of the side'plates' located outside of said segmental plate and saidl support, and-secured tothese parts ley-'suitable screws indicated at`l0.

' The type bar segment is pivoted to swing vertically upon a substantially horizontal axis to shift the type bar lmechanisms between .lower case and upper case positions. lTo this end, each of the plates E8 is provided at its forward end witha bearing sleeve 69 mounted in an -openingin the plate-and held from turning therein by means of ya key (not show-n) formed on the plate engaging in a suitable -keywayY or groove extending .longituldinally of the sleeve. The sleeve/69 :is secured in the plate68 for longitudinal adjustment therein by. means of a cap nut 'H threaded .on the inner `end of the sleeve and a nut I2 vthreaded on the sleeve outside of the plate `68. The type barsegment is pivoted upon bearing pins13 each of which isfthreaded into a tubular lboss-r support-,'15 'fixed in one yof the vuprightshl (Fig.` 1) of the frame of the type carriage connecting the horizontal plates lsand-'ll of saidframe. vEach of the pins I3.projects inwardly from the boss 'l5 into the bearing sleeve B9 to support the type segment and the type segment is held in position longitudinally of its Aaxis by .the engagement of the'bosses 15 with the outer ends ofthe bearing sleevesS.

The manner of vmounting the bearing sleeves'respectively in plate -68 enables said sleeves to' be readily adjusted axially in the plates. In this 'manner the type segment may be adjusted axially Y so` as to adjust the typing positioncf the type heads laterally ofthe machine. lThis adjustment may ibe effected by loosening'the cap nut 'H or the nut l2 or both said nuts and then positioning the sleeve E9 axially inthe plate 68 afterwhich both the nuts vare tightened to secure the sleevermly imposition.

The axis of the type bar segment is located immediately above the typing point or line. The parts of the type bar mechanisms are arranged vso that, in the case of certain type bars, the type bai-will be givenrsubstantially the same actuation 'or movement under the action of the actuating mechanism when the type segment is in upper case position as when the type segment is in lower case position so that the type will engage the work sheet with Vsubstantially the same pressure or force. The parts of the type bar mechanism may be constructed and arranged so that the upper case types will engage the work with substantially the same force as the lower case types in all of the 42 .or more bars of the type basket. Preferably, however, `the construction and arrangement is Vsuchthat the upper case letter types, which are ordinarily somewhat larger in area than the lower case letter types, will strike the work sheet with afslightly greater force than the lower case types to produce substantially uniform type impressions with all the letter types.

The parts of the several type bar mechanisms betweenthe levers At!! and the type bars may be variedin constructions and dimensions in difierent `ways to obtain. substantially uniform actuations .of the type bars from these levers. Certain ofthese variations which have been employed in vactualpractice and have secured satisfactory re- :sultszlare indicated Ygenerally below.

.The type .bars 22 have-:substantially thesanie lengths' throughout-,the typezsegmentbut fthe? type heads arebent :at diierent :angles withrelation to the type lbarszto cause each type to engage the work in apositionasubstantially perpendicular to the type line. 'The links 38, the bell cranks'32,

and the links 52 also preferably have substantially the same dimensions throughout the type segment. The bellccrank levers :45 varyinjdimensions from the central portion to the outer portion of the type segment. In vthese levers, considering the levers innormal positions with the Atype :bars retracted, .the horizontal distance between .the pivot 82 lconnecting the link A54 with thev lever and the. pivot `28, in general, increases slightly ,insucc'essive `levers from the .central vportion to the outer portion off-the-rsegmentalthough thereare certain exceptions to this rule. There is also, in general, a greaterincreaseiin `the vertical distance betwen the-pivot--ll .and the pivotal connection 22 .in successive levers Vfrom the .central portion to the louter portion Vof .the segment. The horizontal distance between the pivot 8 4and the pivotal connectionfliebetween the link52 and said lever is increasedtotastill .greater extent in successive levers from the central portion to Athe outer portion of the segment.

The length of the link 54 betweenthe'pivotal connection V32 connecting the saine with thelever et and the Vpivotal connection 88 connecting the link with the leveri55 increases in successive type bar 'mechanisms from the zcentralportion tothe outer portion of the type bar segment. In the case lof thelever 56, the horizontal distance between the pivot 58 of the ylever andz'the center of the pivotal connection 188V between 'the same and the linkt, .in generahis increased slightly in successive type .banmechanisms from. 4the central tothe outer portion of rthe type bar segment. The vertical distance between the pivot 530i the lever 56 and the .center of thepivotal rconnection .38 diminishes .greatly in successive typebar mechanisms from the central 'portion to the outer portion of the type bar segment while the length'of the horizontal arm of thelever -is substantially increased in said successive type bar mechanisms.

The levers 64 have substantially the same length throughout the series. The distance, however, between the pivot of the lever and thexcenter Vof the-roll 62 is increased, generally, in thesuccessive type bar mechanisms from the central portion 'to the outer portionof the `type bar segment although there are certain exceptions.

vIn the machine illustrated inthis application, the levers 64 are swung downwardly by power under control of suitable Ykeys of the keyboard to actuate the type bars.

Certain of the type bars 22 of the present machine are provided with a plurality of types arranged to be Vbrought alternatively into position to engage a work sheet supported on the `platen and all of the type bars may be provided with this construction if desired. `As shown .in Figs. 1, 3, 5 and Gof the drawings, the type bar 22 is'provided :with Atwo types and 92 `arrangedat Vdif-- ferent distances from the :axis :ofxthetype bar and having the type axesarranged at anacute `angle to .each other and the'acting faces "of the types'at an obtuse angle. With the type bar segment in lower case position, the angularl position of the type bar with relation to the platen is such that the type nearer the axis of the type bari'will be engaged with the work sheet :when th'eltype vbar is swung into type engaging position as'show-n inFig..5. With the `type bar `segment in upper :case .position,` however, the angular :positionoof the type bar with relation to the work sheet is shifted so that the type 90 farther' from the axis of the type bar will be engaged with the work sheet, when the type bar is swung intoV work engaging position, the other type being held out of engagement with the work sheet as shown Vin of the type bar segment and the type bar mecha nisms are preferably such that, with the type bars in retracted positions, the pivotal connections 82 are located the same distances below the lines 9G when the type' bar mechanisms are in lower case positions that these connections are located above said lines when the type bar mechanisms are in upper case positions. Each of these lines bisects the angle between the upper and lower case positions assumed by the link 513 of the corresponding type bar mechanism when the type bar is retracted. In all cases in which it is desirableV that a type bar mechanism shall produce @substantially the same action or that the type shall strike the work sheet with substantially the Ysame force when the type bar mechanism is in upper case position as when said mechanism is in lower case position, the parts are constructed and arranged so that the center of the pivotal connection 88, inthe actuation of a type bar, is moved from the point in the median line or bisector 94 ,which it occupies at the beginning of a type bar actuating stroke, to a point in said bisector at the end of said Vstroke both when the type bar mechanism is in lower case position and when said mechanism is in upper case position. This construction and mode of operation is shown in the vdiagrammatic views Figs. 14 and l5.

A slightly different arrangement of the parts of the type bar mechanisms is employed in those mechanisms in which it is desired that the type shall strike a heavier blow upon the work sheet when the type bar segment'is in upper case position than when said segment is in lower case position. In this case'the parts are constructed and arranged so that the center of the pivotal connection 88, during a type bar actuating stroke, is moved from the point in the median line or bisector 94 which it occupies at the beginning of a type bar actuating stroke to a point below said line at the end of said stroke. The type bar mechanism will have this mode of operation both when said mechanism is in lower case position and when said mechanism is in upper case position. Figs. 16 and 17 show, diagrammatically, this construction and mode of operation.

The construction and mode of operation shown in Figs. 14, 15, 16 and 17 will be further explained in the later description.v

The machine is provided with a type head guide 95 for locating each type head laterally of the machine as the type head is projected downwardly to engage one of the types with the workI and thereby insure the placement of the type in the proper lateral position in the printing line. This guide is attached at its forward end to the traverse portion of plate 'Il of theV frame Vof the type carriage extending in front of thetyping lpoint. The guide 95 is provided adjacent the rail with a slotor guideway 96 having'downwardly converging sidewalls arrangedto receive a projection 97 extending outwardly Vfrom Ythe type head beyond the type 99. Thisfslot. which has only a slightly greater width thanthe projection 91 on the type head, is entered by the projection when the type segment is in lower case position.

In order, correspondingly, torposition the type heads when the type segment is in upper case position, the type head guide 95 is extended rearwardly beyond the typing point and is lformed with a laterally deiiected end portion 98 having a guideslot 99 formed with downwardly converg-V ing side walls Vto'receive the projection I99 extending inwardly from the type head 'when the type segment is shifted to upper case'position. The type bars 22 are preferably made of sheet metal for the sake of lightnessand relatively low expense of manufacture andare easily bent lat- Y erally out of proper position. With theabove construction, if the type head is slightly displaced out of its normal position laterally of the machine, the engagement Vof one of the projections 9'! or I 99 on the type head with one of the side walls of the correspondingslot in the type head guide during the type impression stroke of the type bar will deflectithe type head laterally to place the corresponding type in the proper position laterally in the type line when it engages the work. f i

yThe segmental plateV I4 ofthe type segment is provided with the usual whip ring Ia Whichis engagedby each of the type barsfjust .before a type carried by the bar is engaged with the work sheet lying on the platen. The momentum of the outer'portion of the type bar and the type head after the type bar engages the whip ring carries the type into engagementV with the work sheet', the type bar springing during this action.

.As above stated, in the present construction, power operated mechanism is provided for moving the lever 64 of each type bar mechanism downwardly to engage the types carried by the type bars with the work sheets. In this construction, the power mechanisms for operating the levers. 64 have substantially the Vsaine construction, arrangement and mode of operation as the .corresponding mechanisms forY operating the intermediate levers of the type bar mecha# nisms shown anddescribed in the patent to OscarY J. Sundstrand No. 2,370,505. This power mecha# nism comprises a radius bar I 916 pivoted at. |98 on a rod supported on the cover plate III! ofthe type,Carriage,l a transmitting link H2 connecting the radius bar with the lever .94, a driving link II 4 having its lower end pivotally connected at I Iwith the radius bar, a' continuously rotating flutedshaft H8 and a pawl H29 mounted on the driving linkand arranged to-be engaged with the uted shaft."V The driving link I I4 is acted upon 'by a coiled spring I 2| which tends to swing the Vsameabout its pivotal connection with the radius bar to carry the pawl away from the fluted shaft, this movement being limited by anarresting plate I22 and the drivinglink is swung in the opposite direction to engage the vpawl with the fluted shaft by means of a linkV 24 connectedY with the upwardly extending arm of a key lever |26 pivoted at I28.on the type carriage, said link having a shoulder arranged to engage a pin I30- arranged to engage, at a point in the operation Y oi the type: bar, mechanismadj acont; thefend. of. the downward `movement ,of theflink, a Contact plateA |312 adjustably mounted; on'tlfie.supportingu plate |34 for adjustment toward'- a-ndfrom the driving link. The engagement of Vthe drivinglink with the contact plate limitsthe swinging move-.-4 ment of the driving link toward the luted shaft and causes the disengagement of the drivingpawl from said shaft as said shaft. continuesitsrotaf tion.. By the adjustment of the-contact` plate |32, the` point inf the; movement of =th e driving linkv at. which the driving pawl is disengaged from the iiuted shaft may be. adjusted to. adjust the typel impression. The-Fluted ,-shattr H8. .may be continuously rotated throughl any suitable driving connections.

In the present machine,` power mechanism is. provided. for shifting the. type har segmentfrom lower. case to upper case position when,itis.de sired. to employ the upperI casetypes .and.for. shiftingthe type segment back to lower case position when it is desired to return to. the. use` of thelower case types. This .power mechanism controlled by a suitable key so.that,.upon the depression of the keyv the type-bar'segrnent willI bepositively shifted intoupper case position and` upony the release of the key the type bar segment will be positively shiftedhack, to lower case position.

In the construction. shown, the mechanism for. shifting the type bar segment comprises a. rotatablevvshaft |36 mounted to rotate in suitable bearings 38 lsupported upon. the side plates, |45 of: the type carriage. Upon. the shaftA |3l are fixed, two gears-|132 meshing with gears.4 |44.. the. hubs of which are joumaled .upon bearing studs ist and |4Brespectively fixed. to the. side plates lfl. To the. gears |44 are .attached discs ld each having a crank ,pin |52. upon .which is pivoted, at its upper end, a link orpitman |54., the. lower end of which` is pivotally connected by means offa,A stud Iwith the support 250i the typev segment., An eccentric adjustment ispreferably provided between each. link |51andthe corresponding disc- |50 and. also between the link and the support 25. of the type. segmenttoenable the lower case and upper case. positions of the ysegment to be vertically adjusted.

When thetype bar seg-ment is inlower case posi-tion, the parts of the mechanism forshifting the segment occupy the positions. shown in full lines in Figs. 8 and 9 with the crank pins |52 in their lowerr-nost positions. In shiftingthe type segment to. upper case position, the shaft |36 is given ahalf revolutionI thereby shifting the crank pins |52 to their uppermost positions. In restoring the type.V segment to lcwercase` posi tion, the shaft |36 is given anotherl half revolution to restore the-parts to the positions shown in Figs. 8 and 9.

The mechanism forrotating the shaft- 3.6 comprises anali. revolution clutch mechanism'controlled hyv al suitable casefshiftrkey. Uponthe left handiend` of the shaft-i135 is-fxed a clutch disccl'upo-n -which is pivoted, at |69, a clutch pawl |2 having a tooth le!!` arranged to engage in any one of a series of slo-tsforg-rooyes |56 cut inone Vend of a sleeve his mounted on afreduced portion of thev shaft les' normallyr to turn freely thereon. The sleeve U33 is continuously driven during theoperation of the machine. The paw] |62 is acted upon by a coiled spring. |19 which tends to swingv thel same in a direction to engage th'e'stooth. i'l'inone' of theV grooves |66- in the sleeve maand thei'ebyconneot the sleeve with the; shaftA |36.` 'I'he pawl is. normally held in position upon its pivot withy thetcothi disengaged, fromthesleeve-by.meansof a slide. |12 mounted toslidevertically upon suitable supporting studs4 |14. engaging inslots |16 in the Slide. This slide is formed. wit-h forwardly projecting arms. |18 having laterally projecting fingerslerranged. toy he positioned,l Valternatively .in fro-nt.- of.r a Tradially extendingarm |82 on the pawl H32.`

The vertical position` of;- the.K slide |12, is coritrolled from a key lever |84 pivotedon.l a shaft |86 extending across the machine, said lever beinggconnectednwith the slideby means of a. link ipivoted at itsupper end. tothe-lever andpivotally connected at its lower end Vwith, a-st'ud. |190 `ixed to theslide as shown. particularly...in, Fig. ll.. The slide |12 isnormally-held.inelef. vated position. icy means of a coiled, sprfing,.|,9,2 acting on thekey. lever |84. In order to prevent, retrogradev movement of the disc.. iaandthe shaft |35, after the disengagement oi the clutch, a pawl |913 is. pivotedupon the upper stud,.|1,4 and is. arranged toengage oneA of the` shoulders ||l..formed,.on, the disc. Thepa-wl |24 .is acted upon by-a. coiled spring A| Qwhich maintainsthe saine in engagement withf the edge of thedisc.

When; the. type bar segment is,-inlower.case. position, as shown. in. Figs. l2` 5. and 8,- theslide |12 is locatedv in elevated positienwith thelQWel fir-leerf :su engaging, thearm |82 on. the, payllll to hold thez pawl out ofengagement .wilihthe sleeveV |68., In order to shift the typev bar seg,-V mentto uppercase position, the: key lever. 1.8.4. is depressed. thereby. moving thep.sli,de...|.1,2` down-. wardly an d. disengagingthe lower. finger |-.80 from, the arm. |82 on the clutch .pawl andl movingthe upper finger downwardly into. position. to. engage said arm, after a half revolution of the disc, L55., Upon therelease ofthepayvl |62, thetooth Hilton the pawlis engaged in one. ofthe grooyes |65 on the sleeve |68 and .the-pawl, thedisc. |.5 ..and ther-shaft. |36. are: positively driven. .by the sleeve until the arm`A |.82on1the .pawl isv eng/aged, with. the. upper nger ,on the slide, |12. The en-A gagement of the arm on the pawl with thenger turns. thepa-,wl .on its pivot |60 to. disenguge the tooth Mfromfthe. groovein the sleeve andthere1 by cause-the .arrest of. the rotary movement. oi the disc |58. andthe shaft |36.at thefend ofa,liali revolution ofthe shaft., This half revolution of the shaft shiftsthe pitmanz|54 to raise-the. type bar segment to upper oase position.- The type bar segment willbe .maintained in upper case position as long as the shift lever |84. isheld depressed; Upon the release` of. said lever, the. lever. and the slide |12 are moved upwardly. by the. spring |92, thereby disengagingthe.. upper finger |80 from-the arm |8.2.on the clutch pawl and-'moving the. lower finger I8!!! into position again to engage said. arm. The release of the arm |32 on `the pawl allows the pawl to .act to clutch the., dSc |58 to Dthe. sleeve, {S8/to drive thedisc ISB-and the shaft |36 through` another half revolution at the end of whichsaid arm is again engaged with the lower finger |811. on the slide |12 and the pawl is swungY upon its axis 4to unclutchthe same. from the sleeve |68., This second half revolution of the shaft |36 shifts the pitmans |54 back to their lowermost positions',r and the type bar segment is thereby shifted positively to lower case position. Upon each unclutchins of the disc |58 from the sleeve [E8 and the. s tQP- page; ofthe rotary movement. of the disc, retro? grade movement. of the disc is prevented by the K -by its engagement at the other end with a collar.206 attached to the end of the shaft. The pulley 288 is continuously driven by means of a belt 268 passing about said pulley and about a second pulley 2H) xed to a shaft 2|2 journaled in suitable bearings carried by the frame of the upper portion of the type carriage and carrying the fluted roll ||8. To the pulley 2H)V or to the shaft 2| 2 is xed a second pulley 2| 4 and this pulley is driven from an intermediate pulley 216 by means of a belt 2|8 passing about said pulley's. to rotate therewith. To the shaft 2|'| is fast a second pulley 228 of somewhat larger diameter about which passes a belt 222 by which the pulley 220 is driven froma pulley 224 of still larger diameter. The pulley 224 is mounted on a shaft 226 upon which is fixed a gear 228 meshing with a gear 230 journaled on a shaft 232 Substantially parallelV with the shaft 226. To the gear 238 is fixed a pulley 234 about which passes a belt 236 through which the pulley. 234 is driven from a pulley 238 ixed on the shaft 246 of an electric motor 242. The shaft 2| 1 is held from movement tranversely of the machine and the pulley 2|6, while mounted to rotate with the shaft, is slidable longitudinally of the shaft to accommodate the transverse movements of the type carriage.

The type segment is acted upon by coiled springs |99 each attached toV one end of a bracket26| secured to the plate 'I6 and at its other end to one of the plates 68. These springs counter-balance the weight ofthe type segment and enable the same to..be lifted more easily by the power mechanism. n Y

As stated above, in the case of certain type bar mechanisms, it is desirable that the type should engage the work sheet with substantially the same force when the parts of said mechanism are in upper case positions as when they are in lower case positions. In order to secure this result, the parts of the type bar mechanism are constructed and` arranged as shown in Figs. 14 and 15, in which the roll 62, the lever 56, the link 54 and the lever 46 are illustrated diagrammatically. These figures respectively show the above parts in the positions which they assume in upper case and lower case positions and the said parts are illus- Vtrated in full lines in type bar retracted positions and in dot and dash lines in positions substantially at the end of their type bar actuating movement. Taking the line 94 extending from the centerV 93 of the pivot 13 through the center of the pivotal connection 88, with the parts in type bar .retracted positions, the parts are constructed and arranged so that the center of said pivotal connection is brought back to this line at The pulley 2|6 is mounted on a shaft 2|? k same angles with the corresponding positions of the link 54 in lower case and upper case positions and substantially the same movement or force will be imparted to the typebar. 1 Y Y Y Figs. 1 to 6 inclusive, show the type bar mechanisms arranged to impart substantially equal type impression' movements to the type bar in lower and upper case Positions. This construction, in actual practice, has been employed in the numeral typebar mechanisms, in which the upper case figure type impression surfaces have substantially the same areas as the corresponding lower case gure types. f

Figs. 16 and 17 show diagrammatically, the roll 62, the lever 56, the link 54 and the lever 46 constructed and arranged to impart a greater movement to the type bar to cause a heavier type impression when the parts of the type bar mechanism are in upper case position than when said mechanism is in lowercase position. Fig. 1,6 shows the parts of the mechanism in. upper case positions and Fig. 17 shows the parts in lower case positions, with the parts in full lines in type bar retracted positions and in dot-and-dash lines at substantially the end of their type bar actu-v ating movement. Again, taking the line 94 extending from the center 93 of the pivot I3 through the center of the pivotal connection 88 with the parts in type bar retracted positions, the parts are constructed'and arranged so that Vthe center of said connection 88 is not `brought the end of its type bar actuating movement both back to the line 94 at the end of the type bar Y actuating movement in either the upper ycase or the lower oase position of the parts but the final position of said center is below said line as clearly shown. In this case, the pivotal connection 82 is located at the same distance from the line 94 on opposite sides of said line in lower and upper case positions of the parts, as in Figs. Lle andV 15. With this construction, the path Vof the center of said pivotal connection 88 lies at a greater angle to the positions of the link 54 when the parts are in. lower case positions than when the parts are in upper case positions and the type bar will be given a greater movement to cause a heavier type impression when the parts are vin upper case positions. K

Fig. i8 discloses a modied construction by which the strengths ofthe type impressions may be regulated. In this construction'l the lever 56 consists of two parts of which one part 56a. is pivoted on the pivot rod 58 and a second part or arm 56h is adjustably mounted on the part 56a. The part 56h is formed with a slot 244 in which engages a holding bolt or screw 246 passing through an opening in the part 56a and the part 56h is provided with a second slot 248 in'which engages a boss or stud 56o formed on the part 56a, the part 56h being securedto thepart 56a by the screw or bolt 246.

By means of the above construction, the downwardly extending arm of the bell crank 56 may belengthened or shortened to adjust the length of the type impression stroke imparted to the type bar 22 thereby to adjust the heaviness of the type impression. Y

The type bars, when-retracted, are placed in a forwardly opening arcuate assemblage and they normally occupy the substantially upright posilbar segmentv I4 and the support 26 and by a supporting plate 83 mounted at its lower end in slots ases-,soo

85 and 81 in the segment: mand the-.supportl and having itsupperend attached tozsaid buffer ring. The buier-ring 'i9 supports. apadil of any suitablematerial arrangedV to bel engaged'by the type bars when said bars are in retracted positions.

The present type actions are vsimilar in certain respects, to the type actions shownanddescribed in the patents to Foothorap Nos.y 1,251,361 dated. December 25, 1917, and 1,681,978' dated August 28, 1928, and contain the primari/fob'- jectives of slow and easy starting movement of the type bar, accelerated movement thereof as it approaches the printing point, locking ofthe bar against rebound at the end. of its retracting movement and smooth operation. As a type bar mechanism is started on a type impression stroke from the position shown in Figs. l. 2 and-,3, the arc of movement of the-.pivotaliconnection HH between the link 38 andthe lever 32.l is very nearly perpendicular to thearc of movement of the pivotal connection lillbetweenthev link 38 and the type bar 22 and, as the type bar descends, the paths of movement of the connections IUI and |92 become more nearly aligned. Therefore, the type bar will be started smoothly and easily and its movement will be accelerated as it approaches the work.

The tendency of the typel bar to rebound from the buier ring 19 is prevented by the substantially locking relation of the pivotal. connection [02, the pivotal connection lill and the pivot 34 of the lever SZYwhich are substantially in alignment at this time.

The parts of the type bar mechanism are constructedand arranged so that, during af type impression stroke of a type bar,.the pawl S28 is disengaged from the iluted roll` l i8 when thetype is a substantial distance fromA the worksheet and the type bar then executes the remainder of its stroke under the momentum of the parts of the type bar mechanism. The point in the `movement of a type bar at which the pawl isldisengaged from the fluted roll may be regulatedto vary the force with which the type is engaged with the Work sheet by the adjustment ofl the plate 32.

The present machine has a high degree of visibility combined with the advantages .of the shiftable type `segment for shifting case.

It is to be understood that, except as donned in the claims, the invention is not limited tothe particular construction and arrangement of parts of the illustrated embodiment of the invention but that the invention may be embodied in other forms within the scope of the claims.V

Having explained the nature and object ofthe invention and having illustrated and describeda construction embodying the invention in its pre'- ferred form, what is claimed is:

l. In a typewriting machine, a horizontally arranged substantially flat platen,l a pivoted type bar segment, a series of type bars pivoted on said segment and having their axes arranged in-an arc having its. center-'adjacent the typing point, types mounted on each type bar andarranged to engage a work sheet at the end of a down stroke of the type bar, a series of secondlevers pivoted on said segment upon axes arrangedin an arc substantially parallel with saidA rstarc, links, each pivotally connected directly with a type bar and with one of the second levers, through which the type bars are actuated, respectively, from the second levers, a series o f third levers pivoted on saidy segment upon axes arranged inasubstantallystraight;1ine, operating connec-l tionsrespectivelyfbetween:saidtsecond:levers and said thirdwlevers, mechanism forz-actuatinggsaid third levers respectively to 1 actua-te the, type bars and means,- ior'moving said ltype barfvsegment-:to shiftcase.

2.-. In la typewritingmachinaa horizontally arrangedsubstantially flat-platen', a pivoted type bar'segment', type barspi'voted'onl said segment andeach :having two -types-thereoneach arranged toengagealwork sheet atrthe endl of ardown stroke` of thetyp-e bar, aiseriesofr secondlevers pivoted on said segrnentand` alllhaving r Substantially the same:v dimensions, a: seriesoi linksrespectivel-y connecting said, secondxlevers with .said type-levers; a series of' third levers pivotedl on said segment and varyingtin dimensions from the center; tothev sides of saidsegment, a series of links respectively connectingv said second' levers with;.said third: levers, means for actuating said thirdleyers. toeactuatethe typef bars andA means forY shiftinggsaid type bar segment.

3i In aftypewriting machine, a horizontally ar ranged: substantially flat platen, a pivoted` type bansegment, aseriesfofl type bars pivoted on said segmentupon axes arranged inan arc havingv its centeriaadjacent the typing point, types mounted on each type bar and arranged'to engage awork sheet at'the endof a down stroke of the type'fbar, av series ofsecond levers' allof substantially the same dimensions pivoted on said segmentA upon axes arranged-:in an arc substantially parallel with said first arc, a series of' links connecting saidsecond levers with saidtype levers, a series of; third levers pivoted' on said segment upon axes arranged substantially in a straight line and said'levers varying in'dimensions4` from the `center tothe sidesv of said segment, connections respectively between the second levers: and thethird levers for operating the second levers, means' for actuatingsaid third levers to actuaterthet'ype bars andi means for moving said'type bar'segmentto slfiiitcase.

4. .Inta typewriting machine, a horizontallyfarranged substantially flat-platen, a pivoted type bar segment, a typebarf pivotedon said segment, types;- mcunted; on' said type bar and. arrangedto enga-gela` work: sheet at theend of a downward stroke'v of the type bar, av second lever pivotedlon said segment, a link connecting the type bar with the second lever, a. thirdlever pivoted on said segment, a'link connecting the second levert4 and the'thirdl lever, afourthile-ver pivoted independently of.' saidfsegment, a link connecting the third leverfandthe` fourth. lever, al fth lever pivotedY independently-ofjsaid segment, .an operative connectionbetween thefth lever and the fourth lever; for operating the vfourtlrlever `from the lfifth lever` and means for shifting,v said segment and thereby shifting the pivotal connection between the third',` link andthird lever from a position onk oneside of a lineconneoting the axis ofthe segmentwith the pivotal connection between said link and thefourthi lever-to a: position on the other-qsidef of said line -at substantially the" same distance therefrom.

5 .1In a: typewriting. machine; aehorizontally arranged: substantially `flatn platen', a4 pivoted type bar segment, a seriesfof 'type bars pivoted on `said segment and: each havingtypes'arranged to en*- gageaeworkf sheet at theend of a down'stroke of theA` type bar, a seriesof secondlle'vers pivoted ort. said segment' and having substantiallyA the same: dimensions,V a series-4 orr links; respectively connecting theA second. leverswith the typen bars.

a series of third levers'pivoted on said segment and varying in dimensions from the center tothe sides of the segment, a series of links respectively connecting the third levers with the second levers, a series of fourth levers pivoted independently of said segment and having their arms contive connections respectively between theV fifth leversV and the fourth levers located at different distances from the axes of the fourth levers, means for actuating the fifth levers to actuate ythe corresponding type bars and means for shifting said type bar segment.

6. In a typewriting machine, a horizontally arranged substantially flat platen, a pivoted type bar segment, a series of type bars pivoted on said segment upon axes arranged in an arc having its Vcenter adjacent the typing point, types mounted on each bar and arranged to engage a work sheet at the end of a down stroke of the type bar, a series of second leversv pivoted on said segment upon axes arranged in an arc substantially parallel with said first arc, a series of links respectively connecting said second levers and said type levers, a series of third levers pivoted on said segment upon axes arranged substantiallyy in alignment, a series of links connecting said third levers and said second levers, a seriesl of fourth levers pivoted independently of said segment upon axes arranged substantially in a straight line, a series of links connecting said fourth levers and said third levers, means for actuating said Vfourth levers to actuate the type bar and means for moving said type bar segment to shift case.

7. In a typewriting machine, a horizontally arranged substantially flat platen, a pivoted type bar segment, a series of type bars pivoted on said segment upon axes arranged in an arc, types mounted on each bar and arranged to engage a work sheet at the end of a down stroke of the type bar, a series of second levers pivoted on said segment upon axes arranged in an arc substantially parallel with said first arc, a series of links respectively connecting said second levers and said type levers, a series of third levers pivoted on said segment upon axes arranged substantially in a straight line substantially parallel to a line tangent to the latter arc, a series of links connecting said third levers and said second levers,. a series of fourth levers pivoted independently of said segment upon axes arranged substantially in a straight line, a series of links connecting said fourth levers and said third levers, means Vfor actuating said fourth levers to actuate the type bar and means for shifting said type bar segment.

8. In a typewriting machine, a horizontally arranged substantially flat platen, a pivoted type bar segment, a series of type bars pivoted on said segment upon axes arranged in an arc, a series of secondlevers pivoted on said segment upon axes arranged in an arc substantially parallel with said rst arc, a series of links respectively connecting said second levers and said type levers, a series of third levers pivoted on said segment upon axes arranged substantially inl a straight line substantially parallel to a line tangent to the latter arc, a series of links connecting said third levers and said second levers, a series Vof fourth levers pivoted independently of said segment upon axes arranged substantially in a straight une 'substantially paraui to the latter line, a series of links connecting said fourth levers and said third levers, means for actuating said fourth levers to actuate the type bar and means for shifting said type bar segment to change case. 'f

V9. `In a typewriting machine, a horizontally arranged substantially iiat platen, a type bar segment shiftable toward and from the platen, a series ofY type bar mechanisms each comprising a type bar pivoted on said segment, types mountned on said bar and arranged to engage a Work sheet at the end 0f a down stroke of the type bar, asecond lever pivoted on said segment, a link connecting the type bar and said second lever,

. a third lever pivoted on said segmenta link connecting the third lever and the second lever, a fourth lever pivoted independently of said segment, a link connecting the fourth lever and the third lever and means for shifting the segment thereby shifting the pivotal connection between the link andthe third lever from a position on one side of the median line of the type bar mechanism to a position on the other side of said line at substantially the same distance therefrom.`

l0. In a typewriting machine, a substantially flat platen, a type bar segment, a series of type bar mechanisms comprising type bars pivoted on said segment upon axes arranged in an arc having its center adjacent the typing point, types mounted o-n'each type bar and arranged to engage a worksheet supported on the platen at the end ofla stroke of the type bar, in which the type is moving in a direction substantially perpendicular to the platen, a series of second levers pivoted Y on said segment lupon axes arranged on an arc substantially parallel With said rst arc, operating connections respectively between said second levers and the 'type levers, a series of third levers pivoted on said segment upon axes arrangedin a l ing its center adjacent the typing point, types' mounted on each type bar and arranged to engage a worksheet supported on the platen atthe end of a stroke of the type bar, in which the type is moving in a direction substantially perpendicular to the platen, a series of second levers Vpivoted on said segment upon axes Varranged on an arc substantially parallel with said first arc, links, each pivotally connected directly with a type bar and with one of the second levers, through which the type bars are actuated, respectively, from the second levers, a series of third levers pivoted on said` segment upon axes arranged in a substantially straight line, links, each pivotally connected directly with a second lever and with a third lever, through which the second levers are actuated. respectively, from the third levers, mechanism for actuating said third levers respectively to actu- Y ate the typebars selectively, means for supportimparting case shifting movements ment.v

ases-soo 12. In a typewriting machine, a'substantially bar lmechanisms comprising type bars pivoted on said segment upon aXes arranged 'an are having its center adjacent the typing point, types mounted on each type bar and arranged to engage a worksheet supported on the platen at the end of a stroke of the type bar, in which the type is moving in a direction substantially perpendicular to the platen, a series or second levers pivoted on said segment upon axes arranged on an-arc substantially parallel with said 'first arc, and all having substantially the same dimensions, operating connections respectively between said second levers and the type levers, a series of third levers pivoted on said segment upon axes arranged in a substantially straight line, and varying in dimensions from the center to the sides of said segment, operating connections respectively between said second levers and said third levers, mechanism for actuating said third levers respectively to actuate the type bars selectively, means for supporting said type bar vsegment. for movement with relation to the platen to shift case and means for imparting case shifting movements to said segment.

13. In a typewriting machine, a substantially nat platen, a type bar segment, a series of type mechanisms comprising type levers pivoted on said segment, and having their axes arranged in an arc the center of which is adjacent the typing point, types mounted on each type bar and arranged to engage a work sheet supported on the platen at the end of a stroke ofthe type bar when the type is moving in a direction substantialiy perpendicular to the plane of the platen, a series of second levers pivoted on said segment upon axes arranged in an arc substantially parallel with said rst arc, operating connections between said type levers and said second levers, a series of third levers pivoted on said segment, operating connections between the second levers and the third levers, mechanism for actuating the third levers respectively to actuate the type levers selectively, means for Supporting said type har segment for movement with relation to the platen to shift case and means for imparting case shifting movements to said segment.

14. In a typewriting machine, a substantially ilat platen, a type bar segment, a series of type bar mechanisms `comprising type bars pivoted on said segment and respectively having type heads each arranged to move in a direction 'substantially perpendicular to the plane of the platen adacent the end of a type impression stroke of the corresponding type bar, types mounted on each type head and arranged to engage a work sheet supported on the platen, a series of second levers pivoted on said segment., operating connections between the type bars and the second levers, a series of third levers pivoted on said segment, operating connections between the second levers and the third levers, mechanism for actuating said third levers respectively to actuate the type bars selectively, means for supporting said type bar segment for movement with relation to the platen to shift case and mea-ns for imparting case shifting movements to said segnient. f

1'5. In a typewriting machine, a substantially flat platen, a type bar segment, a. series of type bar mechanisms comprising type bars pivoted on said segment and respectively having type heads each arranged to move in a direction substantially perpendicular to the plane of the platen adjacent the end of a type impressionstroke of' the corresponding type bar, types mounted 'on each type head and arranged to engage a .work sheet supported on the platen, a series ofv second levers pivoted on said segment and having their axes arranged in a circular arc, operating con'- nections between said type bars and lsaid second levers, a series of third levers pivoted on said seg ment and having their axes arranged in a substantially straight line, operating connections between said second levers and said third levers, mechanism for actuating said third levers respectively to actuate fselectively the type bars, means for supporting said type bar segmentwith relation tothe platen to shift` case and means for: imparting case shifting movements to said seg ment. f

16. In a typewriting machine, a substantially at platen, a type bar segment, a series of .typ mechanisms comprising type levers pivoted on said segment, types mounted on each type lever and arranged to engage a work sheet supported on the platen at the end of a stroke of the type leverin which the type is moving in a direction substantially perpendicular to the plane of thev platen, a series of second levers lpivoted on said segment and having their axes arranged in a circular arc, said second levers all having substantially the vsame dimensions, operating connections between said type levers and'said second levers, a series of third levers pivoted on said segment and having their axes arranged in a substantially straight line, said third levers varying in dimensions from the center to the sides of said segment, operating connections between said second levers and said third levers, mechanism for actuating said third levers respectively to actuate selectively the type bars, means for supporting said type bar segment for movement with relation to the platen to shift case and means for imparting case shifting movements to said segment.

17. In a typewriting machine, a substantially flat platen, a type bar segment, a series of type bar mechanisms comprising type bars pivoted on said segment, and respectively having type heads each arranged to move in a direction substantially. perpendicular to the plane of the 'platen adj acent the 4end of a type impression strokeA of the vcorresponding type bar, types mounted on each 'type head and arranged to engage a work sheet sup..

ported on the platen, a series of second leversv pivoted on said segment, and all having substantially'the 'same dimensions, operating connections between the type bars and the second levers, aV

series of third levers pivoted on said segment, and

varying in dimensions from the center to the sides of said segment, operating connections between the second levers and the third levers, mechanism' for Vactuating said third levers respectively to actuate the type bars selectively, means'for sup--A porting said type bar segment for movement with` relation to the Vplaten to shift case and means for imparting case shifting movements to said segment.

18. In a typewriting machine, a platen,a type bar segment shift'able with relation t0 the platen, a series of type bar mechanisms each comprising a type bar 'pivoted on said segment, types mount -oted independently of said segment, means i111-- cludi-ng 'a link connecting 'the latter lever and' the second lever, means for shifting the 4segment and;

thereby shifting the' pivotal connection between the latter link and the second lever from a posi-` tion on one side of the median line. Vof ithe type barrnechanism to a position on the otheri side of said lineat substantially the same distance therefrom and means .for actuatingthe `third lever to actuate theY type jbar, theparts'being constructed and arranged so thatthe pivotal connection between the latter-link and' the third lever moves at a'substantial angle to said vline oted independently of saidsegment, -meansV including a link connecting the latter lever and the second lever, means for shifting the segment and thereby shifting the pivotal connection between the latter link and the second lever from a' position on one side of the median line of the type bar mechanism to alposition on the other side of said line at substantially the same distance therefrom, and means forractuating the third lever to actuate thev type bar,`the parts being constructed and arranged so that the pivotal connection between the latter link and the third lever moves at a greater angle to said line duringthe actuation of the latter lever to actuate the type bar when the type bar mechanism is in lower Vcase position thanwhen said mechanismY is in upper case position. i Y

20. In a typewriting machine, a platen, .a type bar segment shiftable toward and from the platen, a series of type bar mechanisms, each comprising ra type bar pivoted on said segment, types mounted on said bar, a second lever pivoted on said segment, means comprisinga link connecting the type bar and said second lever, a third lever pivoted independently ofV said segment,` e means including a link connecting the' latter leverY and the second lever, mechanism for actuating the latter lever to actuate the type bar.. and

means for shifting the segment and thereby shifting the pivotal connection between the latter link and the second lever from a position on one side y of the median line of the type bar mechanism tot a position on the other side of said line at substantially the same distance therefrom, and means for actuating the third lever to actuate the type bar, the parts being constructed and arranged so that`the pivotal connectionbetween the latter link and the third lever moves to av position in said line at the end of a type bar actuating stroke of the third lever when the type bar mechanism is in both'upper case and lower case positions. f

21. Ina typewriting machine, a substantially flat platen, a type bar support, a series of type bars pivoted on said support and each having a type arranged to engage a WorksheetV supported on the platen at the end of a stroke of the type bar Vin which the type is moving in a direction' the center toward the sides of the series, ,a seriesof operating connections respectively `between the third levers and the Ysecond levers, a series` offourth levers having their arms respectively connect'ed with the third levers of decreasing lengths from the center portion tothe sides of the series, Va series of links respectively connecting the fourth 22. In a typewriting machine, a substantiallyV flat platen, a typebar support, a series of type bars, pivoted on said support upon aXesarranged in an arc, a type mounted on each bar andary ranged to move in aY direction substantially pernecting the bell cranks respectively withthe inpendicular to the plane of thev platen adjacent the end of a typeimpressionstroke of the'corresponding typev bar, a series of second levers pivoted upon laxes arranged in an arc substantially parallel with said rst arc, a series of links respectively connecting said second levers and said type levers, a'series of third levers pivoted upon axes arranged substantially in a straightv line parallel to a tangent to the `latter arc,'a

series of Voperating connections Vrespectively be` tween said third levers and said second levers, a series of fourth levers pivoted upon axes arranged substantially: in a straight line parallel to the latter line, `a series of links respectively connecting said fourth levers and saidV third levers and means for actuating said fourth levers to actuate the type bars. j l

23. In a-typewriting machine, a substantially. flat platen, a forwardly opening segmental series of radiallyldisposed Vpivoted type barsv normally located substantially perpendicular to the platen, a series of second levers, linksv respectively connecting the second levers with kthe type bar, a series of third levers, operating connections respectively between the third levers and the second levers, a series of bell cranks respectively for actuating the third levers, a series of links, each pivotally connected directly with one of the belly cranks and with a third lever, a series of parallel levers pivoted at their rear ends upon axes arranged substantially in a straight line, said levers extending forwardly from their axes, and operating connections respectively between the'parallel levers and the corresponding bell cranks tok actuate the bell cranks and therebyto actuate the type bars. Y Y

24'. In a typewriting machine, a substantially at platen, a shiftable type bar segment, a for- Y perpendicular to the platen, a series of bell crank Vlevers pivoted independently of said segment upon iixed axes arranged substantially in a straight line, operating connections respectively between saidbellcrank levers and the corresponding type bars to actuate the type bars, comprising a series of intermediate levers pivoted on said segment, means for connecting the intermediate levers respectively with the type bars, means for contermediate levers, a series of parallel levers pivoted attheir rear ends uponV axes arranged substantially in a'straight line, said parallel levers extendinggforwardly from their axesoand `operating connections between the bell'crank lever andthe parallel leversfor actuating said bell crank levers. ,Y

- MILES H. .u

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