US1566530A - Typewriter - Google Patents

Description

Dec. 22 1925- 1,556530 M. GARBELL M. GRBELL Dec. 22 1925- TYPEWRI TER 4 snees-sneez 2 Filed Jan. 31, 1921 M. GARBELL Dec. 22

TYPEWRI TER 4 sheets-Shut 3 Filed Jan. 31, 1921 Dee. 22, 1925.' 1,566,530

M. GARBELL TYPEWRI TER 4 Sheats-Sheet 4 Patentecl Dec. 22, 1925.

lseasso iP'ATfENf/r Ornos.

THPEWRITER.

.Application med Januaryei, 1321. serial No. V441357.

To (ZZww/zom, mag/ come/Wii Beiit known that I, ``MAX GARBELL, a citif Zen of VIthe :United States, residing. at Chicago, 2in the connty of Cook and State of ilinois, have invented a certain bnew and usefnl inproveinent in Typewriters, of whichthe following is a full, c1ear,.conois e, :ind exact description, reference being had to the accolnpanying drawings forniing a part of thisspecification;

ri`his invention reiates to iniproveinentsin typowriters, and'inore p'articul'ariy to ajribhongnide and vibrator therefor:

One object of the invention is'tovprovide a =ribbon vibrating inechan'isin of a simple and'efi'i'cient construction adapted to elevate the inkingI rihbon from-its ioWer inoperative position to a higheroperative or Printing positionnpon'actuation of any of the keys especiaiiy -in that class of typewriters known as visibie typewriters.

Another object of'the invention is to provideia combined inking ribbon Vibrator and iide of the type indicated in the preoedingI 1 .ragraph which is especiallyiadapted for that ch ss of typevritei's Wherein a plurality of different printin'g or case po'sitions 'is uti.;:ed,ithe rib'oon always being automaticrlly maintained in definite relations With ies aect 'to the printing point on the usual naen, -regardless ofthe relative case or i'ii-inting positions of the type bars and pla-e--.

,nother object of the invention'is'toproride a coinbined vibrator and guide for a niaiti-coior inking` -ribbon of a typewriter so arran-'ed that any one of the colors of the iibhon may be ntiiized in prin'ting the characters, the coinbined rVib'rato'r' and guide bein;T niovabie from inop'erative to' operative position upon actuation o'f -a printing `lkey So as to VInaintain the visibie Characteristics of lthe -typeWriter. v

Another object ofthe invention is to provvid'e a ribbon v-ibra'ting4 ineehanisinwhichiis adapted'towibrat-e the rihbonffronian'inoperative Ito an operative position Upon actuation of a printing irey in Whichjpredieter- -Inine'd `relation's are niaintained hetween'ithe rib'on and '-the pl ten, ingthat type of'ina- .chi'ne `where the L aten has a phir'alit-y of print-ing positions, the vibr'atingi detiicefbl his iap't ie Provide air 1 malti-color inking ribbon, pern'iittingthe use of jany color of the ribbon in any print-V ing oi arse position of the platen.

Vtherfobjects of the invention are: to provide a ribbon vibrating deviee, the position of'which Will always autoinatically be contrdlled in aecor'dance With the case or j'rinting position of thenplaten; to `provide a ribb'on vibrating device'of the character in-dicated inany of'the preceiding objects of the invention which'is adapted to beioperated by the nsual nniyersal'bar of the typewri'ter and in synchronism With the usualv esoapeni'ent inechanism; to provide a type- Writer having aV ribbon vibrating deviee in acoordance With any of the preceding objects of the invention inl which the platen carriag'e and carria'ge support are bodily reinovabie from; and replaceable on the main l`frame of the typewriter independently of an'dfiwithout involving' the manipulation of any portion of the ribbon Vibrating or guiding device onthe partofthe operator; and to provide a vibra'ting device characterized in accordance With any of the preceding objeets of the invention in Which'the vibrating devi'ce is eompact and therefore espeeially nsefui on a typewriter of the so-called por-table, type .as exeinplified 'in `my 'prior Patent 1,305,893, granted =June 3, 1919..

Other objects of the inventi'on Will more i eLearly appear from the description and ciain'is hereinafter following.`

In the drawings fornnng a part of this speeification, .Figure 1 is a top 'plan View of a typewriter showing niy improvements in connectiontherewith, a portion of the type- Write/r beingr broken away in order to, Inore ciearly illustratecertain features of'the iniiention. Inthis figu're the keyboard is oinitted. Figure i2 is .a vertical, sectionai view` taken thru the machine and -correspending substantially to the line 2 -2 of Figure 1,' all of Vthe parts bein'g'shown in their normal orinoperatiyeposition. Eignre is. la detali `persp'e'ctiye offthe,rihhon Nvihrat'or anfd guide' jpropershown disassoriated from the rest ofth'e typewriter With Jdie exeeption of one 01: two parts jasjhereinafter described andisassoeiated also from eertain coopera'ti'ng parts l(iarriefd by thev FDWQSo-"f-.aed 15-211'8 en- 'vracal, sent nal views, eorr'espond- Plate-n Gerai-eee as by the -pivot rod 25.

platen and Vcarriage and illustrating more particularly the' color shift mechanism. Figure 7 is a detail, sectional viewupon an enlarged scale corresponding substantially to the line 7-7 of Figure (S. nd Figure 8 is a perspective view corresponding substantially to Figure 3 but illustrating another embodiment of the invention, parts being broken away in Figure 8 in order to accommodate the figure on the sheet.

In said drawings, the main frame of the machine is indicated at 10, the same being of any desired form suitable to accommodate the various other parts of the typewriter. In the typewriter to which I have shown my invention applied, I employ a plurality of radially arranged, reciprocating or trust type bars 11, each of which carries at its inner end a vertically extending type block 12 having a plurality of printing type characters 1311, 13b andl 13c thereon arranged in a vertical series and spaced from each other, the lower characters 13*M preferably being the lower case characters, the intermediate characters 13b being the upper case or capit-alsand the topmost characters 3'3 being numerals and punctuation marks, etc. Each type bar 11 carries a horizontally extending rack 14 at its front or outer end with which is adapted to engage a segmental gear 15 pivoted as'indicated at 16 to a portion of the main frame, the segmental gear being adapted to be oscillated by means of a link 17 attached to a lever arm 18 at one endV and to a key lever 19, the latter being -fulcrumed at its inner end as indicated at 20 to a common fulcrum bar 21. For a. .more detailed description of the type bar action reference may be had to my said prior Patent 1,305,893 and for the details of the type block reference may be had to my pending application, Serial No. 420,892, filed November 1, 1920. The type blocks are a-dapted to slide upon a table 22 in reciprocating to and from printing position, being suitably centered at the extreme inner end of their movementnby a guide 23. As is customary, I provide a universal bar 24 pivotally mounted on the main frame of the machine A spacer key of' lever type is indicated at 26, the same being fulcrumed,asindicated at 2? to a suitable bracket carried bythe main frame ofl the 1,5ee,sso

machine, a spring 28 reacting against the spacer'key to normally influence it toward the position indicated best in Figure 2.

In the type of machine which I have illustrated, the platen is adapted for vertical movement or case shifting relative to the type bars, the platen being indicated at 29. Said platen is rotatably mounted in any suitable manner on a platen carriage 30 which is adapted for reciprocating or longitudinal movement transversely of the machine by means of rails 31-31 forming a part of said carriage and cooperating rails 32-32 rigidly carried by a carriage support 33, there. being a plurality of anti-friction balls 34 interposed between the sets of tracks 31-32 to reduce friction. As will be understood by those skilled in the art, a suitable'escapement mechanism is employed to effect the step byl step movement of the platen transversely of the machine, such escapement mechanism not being shown as the same is deemed unnecessary for an understanding of my invention. The carriage 30 and'carriage support 33 together constitute what may be termed the combined platen carriage support and carriage, and said combined carriage support and carriage, as an entirety, is vertically movable or shiftable relative to the main frame of the machine. To provide ,for this movement, the carriage support is provided with vertically eXtending enlargements 35--35 near each end thereof, the same being vertically axially recessed soas to telescope on a corresponding pair of upstanding posts 36-36 carried by the main frame of the machine. In addition to the vertical case shift movement provided for, the combined platen support and carriage is readily'bodily verticallyV removable from the main frame of the machine. Although I have not herein shown any case shifting means, as the same are not deemed essenti'al to an understanding of the present invention, a satisfactory form of such means permitting of the case shift and removable features above enumerated, is disclosed in my pending application 360,958, filed Febrv 24, 1920, to which reference may be had.

Referring now more particularly to the ribbon vibrator and guide, I have shown a multi-color inking ribbon 37 having an upper portion 37a of one color and'a lower portion 37b of another color. Said ribbon exbtends crosswise of the machinevin a well by any suitable means, not shown. The ribt' bon guide proper and vibrator is best shown in Figure 3, where it will be seen thatI employ two vertically elongated loops 39 39, each having an Opening aO-LO topermit the msertion'and remove] of the ribbon and,

after it is once inserted, the ribbon Will be held Vertical and unwrinkled, as shown in Figures V2, 4 and 5. The loops 39 .are each provided With doWnW-ardly .extending bars 41-7-41 each of said bars 41 having .anenlargement .as indicated at 42, at vWhich point is Secured a laterally extended .cylindrical pin 43, for the purpose hereinafter described. The bars 41 are vertically ,efuided by any suitable means, that Which I have shownv comprising a plate 44securedat its upper endto a part of .the main frame 11.0* and at its lower end hooked under .a fiXed braclet or plate 45 and a supplemental plate 46 se cnred to said part 110 of the main frame by a machine screW 47 or vother equivalent means. The plate 44'at'itsupper end has outturned flang'es 48-48 at eachside thereof and the plate 46 has coope-rating rght,-. angled flanges 49 at each side,-the two sets of flanges 48 and 49.-tog-ether forming subst-antial'ly rectangular VerticallfyY extending guiding' openings for the bars 41. Near the bottoinof the plate .44, the same is so stamped as to provide a pair of horizontally andirearwardly extended fianges 50 .50, each .of which is slotted in aiinement With the Jaforementionednpper guides so as to guide the bars 41 at their lower ends. The plate 44 is also preferably provided With integral upwai-.dly and inwardfly Iextended bracing' bars 44 44a which, at wtheir-v .upper ends, are hoo-ked over the universal fulcrum 21 as indicated at 44b in Figure 2; Arl-tho'the ri'bbon guide proper is formed of two separate .elements 39-41, as just'described, for c0nvenience, the same is referred to hereinafter as a single element or ri'b'bon guide proper.

Secured to another part 210 of the main frame at the same horizontal level bas'the part 11.0 but in front thereof, is a .stamped plate braeket 51 lhaving` a pair of laterally spaced depending` arms 52-52; Said brac-ket may be Secured by vthe machine screW 54 and in order to prevent the zbracketl from tWis-ting where only one securing screw is .eniployed, the braclet may be provided With horizontallj: disposed fianges extending' nn-V (ler the part 210 of the main frame. A horizontallf,T extending' fulcrum or pivot pin 56V is mounted in said arnis 52 nearV the bottom thereof. Pivotally mounted on the pin 5.6 is yoke-like or -sha-ped fulo-rum lever having par-,allel side arnis 57 57 connected .at their outer end by a cross piece 58. Pivotall;` connected to the outer Aend of said lever 7 -8. ndicated at 5S;) is another yoke like lever 50 having a pair of spaced arms (it l which are curved atlirst doWIiWardlv and lthen inclined at their lower .eds indieated at 62 `62, said arnis strfaddlingithel bai-sieti .of the ribbon* guide and .Vibratozz Title lower ends of each of said arms 61 areforined with elongz'ated slots 63631n which .extend the .43 so. as; toiproride efpaetal butsliding connection between the arms .61' and the* irib'bon .vibrator guide. 6l61 is. also ,provided on one side thereof With afor'wardly .or'...outW.ard1ly .extended lever arm 64 which carries a piVot-,bolt 465 exten dine; thru a Vslot 66 .in .a bell .crank lever 67, V.th-ereby providing an adjustablezpivotal The lever connection? between said bell cranklever 67 i and. the yoke lever .6l6l -Thebell1 crfank leverv 617 is piyotally attached as indicatedv at 68 lto a' depending armor bracket `of thefmain` franee A coil Spring` 69 ismounted on the pi-Vot pin .68, said ,Spring haVngfon-e .end thereof, 10, hooked under .onearm of the bell cran'k lever.l the other end .of .the sp'ringenf. gaging the bracketBS, so that .the springl69 normally tends to elevate .the varin 67% of-the hell .cranfk lever. The other arm 67.ofthe bell crank lever which is extended -n .a eral down-Ward direction haspivota'lly se-` curedtheneto lat its; lower end as ndicated'b at *,0,,on e endof a link? 1 Whichfisextended. 1

to and operatively conneoted With a suitable part of the escapement mechanism so' as vio actuate, the latter, Suchescapement meohae nisinnotbeing shown ,asthe'same is deemed unnecessary. The outer or :ior-ward end of the Yarm 67%l of the hell ,cra'nk lever is .pirotance With' adjust-,ment ofV Vthe yoke lever 57-458 about its fulcrum 5,6,.as'-hereinafiter described, the. relative positionsof the pivot pins 56' and 6,5 Will not be dijsturbed.

VThe yole or -vshaped lever 57.758 at its inner aend has rigid-,ly or integrally for-med theile'with a .centrally `disposed armg which is curied ,Clownwardly as indicated; ,at 73, then slightlyinclined.downwardly from the horizontalfor a distance as indicated at 131? and iinally Aextended up-Ward'ly as in-. dicated at 739 and formed With a generally horizontally ,disposed shoulder or stop V74. The end 731? iscentered andv guided in a slot 75 formed in a .clownwardly nclined triang-ular! shaped section 4.6-a of the plate 46. To permit the arm 7,3` to extend thru the plate 44, thelatter is `suitablyout away as nclicatedl at 44% :tension `spring 7.6 is seeu-redat its ,Upper .end as indioated atpireferafblyto the nnerend ,of the ,sciew' and atits lower .end as indicatdat-f to the crossrpiece 58 lof the. yole lever? .,5 7=T;58f, said spr-ing 76 -ac,tn r to elevater-the enter ,end ,ofl the yoke .lever so far asit isperinitted todoso. v, V v lsfe Ting: nowmom. nartioalerlyfofge 81 is so positioned that, when the bell crank i toV 79 is in the full line position shown in Figure 6 and the platen carriage is in its lowermost printing position, as shown in Figures 2 and 4, the stop or shoulder 74 Will be depressed to its lowermost normal position as shown in Figure 4 and so that the uppermost section 37a of the ribbon will be the one which is employed in the Operation of the machine, it being observed that the ribbon is below the normal. printing position for the lower case -type'characters as shown in Figure 4 so that the typewritten matter is visible, as will be understood by those skilled in the art. Asl the platen carriage is given a case shift to either the intermediate o-r uppermost type character level, it is evident that the stop shoulder 81 of the bell crank 79 will be elevated correspondingly, thereby permitting the tension Spring 76 to elevate the free end ofvthe lever 57-58 and correspondingly the pivotal Connections 59 of the yoke level 61 which in turn elevates the ribbon vibrator guide so that the latter always maintains predetermined relations with respect to the platen and point of printing.

1 In order to adjust the inking ribbon to employV a different color section thereof, as for instance the lower color section 371), the bell crank 79 is adapted to be manually set or adjusted by means of a rod 82 pivotally connected to the arm 7 9b of the bell crank as indicated at 88. Said rod 82 is slidably supported at its lefthand end as viewed in Figure 6 on the carriage support 83 by means of a stud 84 extending thru a slot 85 in said rod. The rod 82 at its end has a dependin'g finger piece 86 by which it may be pushed in or out as will be understood. VVhere a twocolor ribbon is employed, the rod 82 and bell crank 79 will have two adjusted positions and in order to more easily determine these positions without any particular care on the part of the operator and maintain them in either of said positions, said slot 85 is preferably formed with two circular enlargements 85fl--85a at each end in which is adap-ted to frictionally engage a conical plug 87 slidably mounted 011 the stud 84 and yieldingly impelled inwardlyby means of the Spring 88 which react's against said block at one end and against the head of the stud 84 at its opposite end. By shifting thebell crank 79 from its full' line position to dotte d line position shown in Figure 6, the stop or gauge shoulder 74 will bepermitted to correspondinglyA rise a's'best indicated .in 4Figure Lasa-,530

6, thereby permitting elevation of the ribbon vibrator guide a sufficient amount to bring the lower part 37b of the ribbon in proper position to be struck by the lower case keys. Case shifts of the platen carriage will maintain the relations of the ribbon and platen even with the bell crank 79 shifted to dotted position, `as will be understood.

-From the preceding, it will be seen that the ribbon vibrator guide rises and falls in accordance with the nlaten and that the particular color section of the ribbon desired may be determined by setting the bell crank 79. VVhen one of the keys or spacer is actuated, the universal bar 24 will be depressed in a wellknown manner, thereby depressing the arm 67:t see VF igure 3) ofV the bell crank 67 and thru the intermediary of the yoke lever 61-62, will vibrate or elevate the ribbon guide to inking position. lSimultaneous with the Operation of the universal bar and the bell crank 67 the escapement mechanism will also be operated as previously described,.

thru the intermediary of the link 71. Due to the alinement of the pivot pins 56 and 65, heretofore mentioned, which'will always obtain regardless of the case po-sition of the carriage or the color section of ribbon being employed, the throw or oscillation of the yoke lever 61-62 will remain the same so that the various adjustments and conditions provided for in the ribbon vibrator do not afect the throw or movement of the ribbon itself, a very important consideration in this type of mechanism.

Due to the unavoidable variations which may occur in the manufacture of the various parts and assembly thereof, certain adjustments may be necessary and particularly is this true. with respect to the usual escapement mechanism. Inasmuch as my improved ribbon vibrator and the escapement mechanism are actuated from a common member, the universal bar 24, adjustment to take care of variations in the escapement mechanism might effect the throw of the ribbon vibrator guide unless special means are provided to permit independent comp'ensation with respect to the vibrating mechanism. To this end, each of. the keys 19 and spacer lever 26 may be formed with a slotted enlargement as indicated at 26a in Figure 2, where engagement is obtained with the universal bar. This permits the lower engaging edge of the key lever or spacer lever to be readily adjusted by either squeezing with a pair of pliers or by spreading with a screw driver o-r the like, inserted thru the slot.

In Figure 8, I have shown a different methodV of compensating for the variations and adjustments mentioned in the preceding paragraph which provides for a quioker adjustment than in the case of the Structure illustrated -in Figure 2 although' the latter may Vhave a slight advantagel in the; cost of manufaoture. The femb'odim'entv ,sliown in Figure 8, is distinguished, broaclly; from the einbodiment shown inFigure 3,b,y utilizing an vadjustable connection between the parts of the lcver which aredirectly interposed between the universal -bar operated bell crank 67 and the" ribbon vibratoruguide proper. In Figure 8, 164 correspondsrtothe arm 64, th'e samebeing pivoted as indicated at 159 to. the yoke lever 157,-.-158. The down'wardly dependent arms' 161-161 which are connected by an integral cross piece -161a as in the case of Figure, are ,independently.pivoted on the pin 159 so that relative'pivotal movement between the level' arm 164 on theone hand andthe farm'161 on the other hand is permitted. iThis'r'elativeV pivotal movement is governedby a tension Spring 89attached at one. end-toan upstandingfinger 164a and at its other .end to an upstanding finger 161 `The. lever arm 164 is provided with astamped' integral flange 164b in whichis mounted an adjustable screw stopV 90 adapted toV engage with a finger 161b formed .integrally with the cross piece 161a. SaidV finger 161b is also adapted to coop'erate with another adjustable screw stop 91v threadedin a. fiange 157*1 formed integral with the yolre lever 15 158. The cross piece 158 has formed integrally therewith at its center an arm 17 corresponding to the arm 73-74 of. the structuresho-wn in Figure 3, the position of which is determined in accordance with the position ofth'e stop 81 carried by the platen carriage support;

VVitli -he construction lllustrated'in' Figure 8,' it is evident that the position of'the yoke lever 1574-158Hwi1l beIgovernedlthe same as in thejcaseof the yoke lever 57-458. Adjustm'ent of thet'un-iversal bar,"as for instance' to take care'of changes ne'cessary in the esc'ap'ement mechanismwill in turn affect the. lever aim-164. VVhen said adjustment has been ob-tained, the screwstop' 90 is then adjusted soas to engage finger 161b and thereby properly position the level' arm 164 and bring its' pivotal connection (corresponding to 65) with the' bell-crank lever (corresponding to 67%67-6TB) Vi'n alinement with the pivot or ful'c'ruml (corresponding to 58)V of the yoke lever 157- 158. vTh'e adjustablescrew stop 91' is then adjusted to such a position that it wil'l be en'g'aged/V by the` finger 161b whenthe ribbon guide and lever arms 161 haveV beenmoived to their op'erative or'printing position. Et is evident that, upon depression of the universal bar and consequent depres's'ion of the leyer arm 164,V the lever arms` 161 will follow the movements of the lever armd 164 under the tension ofthe spring' `89`t thereby elevate the I'ibb'ovnvibrator` guide until the latter has reac'hed its perinitted up'p'ermost position-when .further movement. isrprevent ed by engagenient-I .of the finger .161b with theadjustable screw stop 91..`

, From the preceding descriptiomiit will be seen that, with my improvements, allV possible conditions with respect t'ofthe relative positions' .of a multi-.color `ribbonland therpl'aten. are, automa-tically talen care of with the exception of: the `manuallyf set means utili'zed in the color positioningstop.

It will'xfurthermore be obsei'ved that Trenioval of the platen and theicombinqedplaten'f vcarriage and' carriagel support bodily from the main frame of the machine' does not ret-v quire any manipulati'on of the operator to effect disconnection of any parts rela tingi to the ribbon vibrator and guide but on the conti'ary the platen' and the combined carriage' andcarriage support may be rei'nove'd andreplaced'at will and tlieproperrelation of the ribbon` vibrator with respect to the plat'en` Will: always be'maintained. I have hereinsho-wnand described' what I ,now consider the preferred`-n1anner of carryingout the inventio, but the same is by way of illustration only'and'lnot by; way of'limitation. I am aware that various: changes and. mo'difications may be Fmadein'the Vdetails of construction and arrangemen't of parts and all such changes' and modifications that come within the scope of i the claimsl'ap'pende'd h'ereto are contemplated.` f

I claim:

l. Ina typewriter having* alnainl frame,V

a platenplat'en c/arria'ge, carriage support,v type bars proyided 'with a p'l'ura'lity of spaced' printing type' characters' thereon,

means for eifecting a relative'ca'se Shift between thetype bars and tlieplatentokaccordwithdifferent'printing positionsfand an inkingl ribbon: the combination-with' a rlbbon vibrat'or; of avibrator l'eyer; asu'pf-` port pivoted to the mainl frame and'to which the vibrator' lever is pivotetl'j said support being automati'cally positionedvn'accordance with the vrelatifvev case hift positions Jof the platen and :type bars; an Operating flever pivotally connec'ted tov the Vibrator lever', the

piv'otalaxis ofsai'd opera'tingV lever .being lit) lio

relative-vcaseshift be- V tween the type barsV and the plat'en to accord f with different print'ingf p'os'ition's'i,` and an inking" rbbon: the combination with ar'ibbn vibrator; of a'yibr'ator lever; a support pivoted to'the inain frame and to which the vibrato`A lever is pivoted, said support being automatically positioned in accordance with the relative case shift positions of the platen and type bars; an Operating lever pivotally connected to the vibrator lever substantially in alinement With the pivotal aXis of said support Whereby the relative normal positions of the vibrator and platen remain substantially ,constant in all case shift positions; and means for actuating said Operating leve said carriageV support having means co-operable With a part of'said support to determine the position of'the latter.

3. In a typewriter having a main frame, a platen, type bars provided with a plurality of spaced printing type characters thereon, means for effecting a case shift of the platen, and a multi-color inking ribbon the combination With a ribbon vibrator; of a vibrator lever; a movable support mounted on the main frame and to which said vibrator lever is pivoted, said support being automatically positioned in accordance with the case shift position of the platen; an Operating lever pivoted to the main frame and operatively connected With the vibrator lever; means for actuating said Operating lever upon actuation of a type bar, and manually set'means for varying the normal position of the vibrator to present different portions of the ribbon for printing.

4. In a typewriter having a main frame, a platen, type bars provided With a plurality of spaced printing type characters thereon, means for effecting a case shift movement of the platen, and a multi-color inking ribbon: the combination with a ribbon vibrator; of a vibrator lever; a support pivoted to-the main frame and to which the vibrator lever is pivoted, said support being automatically positioned in accordance With the case shift position of the platen; an operating lever'pivotally connected to the vibrator lever substantially in'alinement With the pivotal aXis of saidsupport whereby the normal relative positions of the vibrator and platen remain substantially constant in all case shift positions of the platen; means for actuating said Operating lever; and manually set means for varying the normal position of the vibrator to present different portions thereof for printing.

5. In a typewriter having a main frame, a platen, type bars provided with a plurality of spaced printing type characters thereon, means for eifecting a case shift movement'of the platen, and a multi-color inking ribbon; the combination with a ribbon vibrator; of a vibrator lever; a support pivoted to the main frame and to which the vibrator leveris pivoted, said support being automatically positioned in accordance with the case'shift position of the platen; an Operating lever pivotally connected to the vibrator lever substantially in alinement With the pivotal axis of said support Whereby the normal relative positions of, the vibrator and platen remain substantially constant in all case shift positions of the platen; means for actuatingsaid Operating lever;

and manually set means for varying the normal position of the vibrator to present dif ferent portions thereof for printing.

6. In a t-ypewriter having a main frame., a platen, means for efecting a case shift thereof, an inking ribbon, and a universal bar; the combination with a plurality of type bars having a plurality of type characters thereon; of key levers for actuating said type bars and' adapted to cooperate with said universal bar; a ribbon vibrator normally positioned in an inoperative position said vibrator being -shiftable to tWo operating positions for each case-printing position thereof; means automatically operable from said universal bar for elevating said ribbon vibrator to operative position'upon actuation of a' type bar; and mechanism Cooperable With said means for shifting the operating position of said vibrator to said two different positions for each case-printing position thereof and maintaining Constant the normal inoperative and operative position thereof in accordance With each case printing position' of theplaten, said mechanisin including a lever directly supported by the main frame and aii adjustable abutinent means coacting with the lever.

7. Ina typewriter, the combination With a` main frame; of a platen, platen carriage and carriage support movably mounted on said main frame and adjustable to different case printing positions; a universal bar; a ribbon vibrator supported from the main frame independently of-theplaten carriage and support; ineans for vibrating said vibrator upon actuation of the universal bar and providing a similar Operation of the vibrator independent of the case position of the platen; and an adjustable stop cooperable with said last named means to determine the normal inoperative position of said vibrator, the position of said stop varying in accordance with the case position assumed by the platen.

8. In a typewriter having a main frame1 a platen, a platen carriage, a carriage support, type bars provided With a plurality of spaced printing type characters thereon, and means for effecting a case shift movement of the platen, the combination with a ribbon vibrator; of a vibrator lever; a movable support mounted oii the main frame and to which said lever is pivoted; means for automatically moving said support to different positions in accordance with the case shift position of the platen; an'operating lever pivoted to the main frame and pivotally connected With the vibrator lever:

naeabee means for actuating sai-id' Operating lever;

and manually set means for-varying the normal position of the vibrator to thereby present different portions of the ribbon for printing, said manu'ally set means being mounted on the platen earriage support.

9. A ribbon vibrator for a typewriter having a main frame, said vibrator including: a fulcrum lever pivotally mounted about a fixed pivot at one end; a tension spring extending between said fulerum lever and the main frame; a vertically movable ribbon vibrator; a second lev-er pivotally mounted adjacent the free end of said fulcrum lever, said second named lever having operative engagement with the ribbon guide and adapted to impart vertical movement to the latter; a third lever pivotally supported from a fixed portion of the frame and adapted to be oscillated upon actuation of the usual universal bar, said third lever having pivotal connection withthe second named lever substantially in alinement With the fiXed pivot of the fulcrum lever; and a stop shoulder carried by said fulcrum leverv and rigid therewith, the position of said shoulder and fulcrum lever being adapted to be determined by the easeprinting position of the typewriter plate'n.

10. A ribbon vibrator attachment adapted to be attached to the main frame of a typewriter, said attachment comprising: a braeket adapted to be'secured to a. rigid part of the typewriter frame, said bracket carrying a relatively fixed pivot; a vibrator guide adapted to be secured to another part of the typewriter frame; a vibrator vertically slidablyv mounted in said vibrator guide; a fulcrum lever pivotally mounted at one end on said fixed pivot; a stop shoulder rigid With respect to said fulcrum lever and the position of which is adapted to be determined by a cooperating member carried by the platen carriage support; and a lever pivotally .monnted intermediate its ends adjacent the free end of said fulcrnm lever, said second named lever having operative engagement with the ribbon vibrator to effect vertical movements of thev latter, the opposite end of said second named lever being adapted part of the main frame and operativelyl connected at one end to the universal bar land at its other end to a link adapted to ac-tuate an escapement mechanism; of a combined ribbon guide and vibrator proper, adjustable to different Operating positions to bring different zones of the ribbon in cooperative relation to the type of the bars; means for imparting vibratory movement to said vibrator proper in its different Operating positions and operable from said first named lever; means for determining the normal inoperative position of Vsaid last named means in accordance with the caseprintingv position of the platen; and adjustment means determinative ofthe different Operating postions'of said vibrator guide andalso determinative of the normal position of the actuating means for each operative position of the vibrator guide with respect'to the universal bar independently of therelation between the said escapement link actuator and the universal bar.`

f 12. In a typewriter, the eombination'with a main frame; of a platen, a platen earriage,

and a carriagersupport; a universal bar; a combined vibrator and guide for a multieolor inking ribbon supported from the main frame and operable from the universal bar from inoperative to operative position, upon movement of the universal bar; and an adjustable stop on the carriage support,

with the combined vibrator guide in all positions thereof to dete-rmine the normal 90 said stop being in continuous engagementf.

position of the latterwith respect to the i p-laten in accorda-nee With, the partic-ular color of the ribbon desired for use.

In witness that I claim the: foregoing, I have hereunto subscribed my name this 12th day of January, 1921. f

MAX GARBELL.

Images