US1400702A - Typewriting-machine - Google Patents

Description

J. WALDHEIM.

TYPEWRITING MACHINE.

APPLICATION FILED DEC.I3, I919.

I Patented Dec. 20, 1921.

3 SHEETS-SHEET li Aw 6000006 .1. WALDHEIM.

T,YPEWRIT|NG MACHINE. APPLICATION FILED DEC-13' l9l9.

1 ,400,7Q2, Patented Dec. 20, 1921.

3 SHEETS-SHEET 3- I gm i faf FFE CE JOHN WALDHEIT/I, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO UNDERWOOD TYPE- WRITER COMIPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

c rYrnwRITr e-MAcnIivE.

Specification of Letters Patent. Pafignted Beg, 20, 1921,

Original application filed March 20, 1918, Serial No. 223,489. Divided and this application filed Decem- 'ber 13, 1919. Serial NO. 344,686.

To all whom it may concern:

Be it known that I, J OHN VV IDH IM, a citizen of the United States, residin in Elizabeth, in the county of Unionand tate of New Jersey, have invented certain new and useful Improvements in Typewritin Machines, of which the following is a specification;

This invention relates to typewriting ma chines, and more especially to the ribbonvibrating mechanism for such machines, and is herein disclosed as applied to a machine having two setsrof'type-bars adapted to print at different printing points, and embodying many of the features of the Underwood standard typewriting machine.

This application is a division of my copending application Serial No. 223,489, filed March 2-0, 1918 (now Patent No. 1,340,925, dated May 25, 1920). In machines oi this'a'nd other types it is frequently advantageousto have two ribboncarriers, which may be alternatively vibrated to bring a ribbon to the printing point, one carrier being idle, while the other is being vibrated. V

According to the present invention, there may be provided a single actuator, which is adapted to engage either of two vibrating levers, one vibrating lever serving to actuate one ribbon-carrier, and the other-serving to actuate the other ribbon-carrier, Where the machine embodies two sets of type-bars, there maybe a separate universal bar for each set of type-bars, and the actuator may en age with either of said universal bars. in order to hold the vibrating lever against sidewise movement, du'ringthe shiftin'goperation, each vibrating lever may be guided by bracket or member projecting from the segment which carries the type-bars. 11

the machine embodies a case-shift whichshifts the platen, there may be provided "means to insure engagement of the actuator with the vibrating lever irrespective ofthe position of the vibrating lever, this being usually needful'since the fulcrum of the vibrating lever usually shifts with the caseshift. Means may be provided for supporting each'ribbon-carrier, so that .it does not drop when its vibrating lever is disengaged from the actuator.

Other features and advantageswill-hereinafter appear.

In the accompanying drawings, 7

Figure 1 is a plan view,largely diagrammatic, of an Underwood standard typewriting machine having two sets-o1" type-bars,

and showing my invention applied thereto.

Fig. 2 is asectional side view of the Same. Fig. 3 1s a skeleton perspective rear view, showlng the rlbbon-vlbratlng mechanism.

In carrying out my invention, I have,

mounted two type- sets 10 and 10 iii-front of a platen 11, either one of which may be moved into effective relation therewith] Said type-sets comprise type-bars 12, which may be swung to print against the platen through the intermediary of bell-cranks 13,

actuable by sub-levers 14-. The free ends of the sub-levers 14, of which there are two sets, one associated with each type-set, project forwardly under hook-like portions 15 on keys or key-levers 16, so that they may be actuated by said key-levers and moved rela- "tively thereto when changing from one typeset to another.

To conveniently-change from one, type-set to another, the type-bars '12 are mounted on two -type-bar segments 17, which are supported by a cross-bar 18, forming part of a type-carrying truck 19 which is guided by a rail 20, extending in'the direction of the platen and secured to the machine frame 21. The type-carrying truck 19 may be moved from side to side of the machine frame 21, to render either type-set effective with the platen, and to move'the free ends of the sub levers 14 into effective relation with the en gaging portions 15 of the key-levers 16. This maybe done by means of a fingerpiece 22, forming part of the ltype-bar rests secured to the type-carrying truck 19.

bars 24 and 25, res ectivelv secured to the v P U a type-carrying truck, so that they may be actuated thereon.

Each sub-lever l i-has associated therewitha return-spring 26, to restore the connected type-bar 12 to its normal position, upon the return of the key-lever 16; the latter being restored'to its normal'position by a spring 27;

The key-levers 16 are pivoted on a common fulcrum-rod 28, supported on a slotted cross bar 29{ secured to the machine frame '21. V T he key-levers extend forwardly beneath the sub-= levers 14, out of the path of travel of the type-carrying truck 19 and the sub-levers 1 1 carried thereby, when the free ends of the latter are. moved into engaging relation with the hook-shaped portions 15 on said keylevers 16. 7

To maintain the effective relation between the key-levers 16 and the sub-levers 14, or, in Otl1'e1"\VOI-lS,"'CO guard against disengagement between said levers, during an a'ctua tion thereof, slotted guide- plates 30 and 31 are provlied for the key-levers 16 and the s levers '14, respectively, which avoid any poss1 sidewise motion of said levers relative to each. other while being actuated. The

guide-plate 30 for the l y levers 16 is preferably secured to the macl 1H6 frame 21, while the guide-plate 31, which guides e forward ends of the sub-levers 14:, is secures 0 the type-carrying truck 19 b means of s brackets 32 extending forwardly there-Mom.

To facilitate the mo ements of the typecarrying truck 19, anti-friction balls 88 are provided, which play in raceways 34 formed by grooves in the fixed rail 20 on the machine frame, and grooves in a rail secured to, the type-carrying truck 19.

By an inspection of 2, it will be seen that most. of the mechanism, carried by the type-carrying truck 19, is supported in front of the guide-rail 85 thereof Thus, there is an overhang which has a tendency to turn the rail 35 within the rail 20 and cause unnecessary binding. To guard against such action, I have provided guide-rail 36, extending underneath the ty e-carryinp uck 19, with which one or more rollers 37 1.1 .y

' gage, said rollers being rotatably supported on the slotted cross-bar 25 of s" truck.

The type-carrying truck 19 is normallv locked, to prevent accidental displacement, by means of a pawl 38 which normally enin one of two slots 39 and iihlfig. 1, according to which type-set is effective; said slots being formed in the cross-bar 25 of the truck 19. Vl henit is desired to change from one type-set to another, as for example fron'i type-set 1.0 to type-set lOfl-the pawl. 38 is moved out of the slot 39 by means of handle or finger-piece 11, Fig, 2, pivotally'mounted at the left-hand side/and at th front of the machine frame 21. 7 about its pivot 12 to draw on link 4L3 con nected with an arm 44-, projecting downwardly from a -ock-shaft 15, upon it .ich the pawl. is mounted. Said finger-piece l1 is moved until it strikes a fixed stop 46, at which time the pawl has been moved out of the slot 89. The type-carrying truck is then moved rigl'itwardly a trifle until the slot 39 is out of alinement with the pawl 38, at which timerthe operative may let go of the lingerpie'ce controlling the pawl, whena returnspring. 47 becomes effective to hold the pawl 38 against aback 48 formed between the slots ported at 58 on said carriage 52.

The handle is swung 39 and 40, on the bar 25. A continued movement of the type-carrying truck, by means of which time the pawl also drops into the slot- 40 by the influence of the return-spring 17, and the handle 41 moves backagainst afixed stop 50. Thus, the left-hand type-set is brought into effective relation with the platen, and is accurately positioned by means of the stop, and locked in said position by means of the pawl 38, without any special attention of the operative. To facilitate the entrance of the pawl 38 into the slots 89 and 40, the pawl or the slots may be provided with beveled edges. I

The platen 11 is mounted on a platen frame 51, supported for case-shifting movements, hereinafter described, on a carriage 52, which is arranged to travel for letter-feeding movements,rduring typing operations, on a front rail 53 and a rear rail-54 secured to the machine frame 21.

The letter-feeding movements of said carriage are controlled by an'escapement comprising an escapement wheel 55, which is geared to the typewriter carriage by means of a pinion 56 and rack 57 meshing therewithysaid rack being pivotally sup- A suitablespring-drum 59 constantly urges the carriage 52 leftwardly, and thus tends to 1'0- tate the escapement wheel 55, which is provided with teeth 60, engaging with a loose dog 61 and a fixed dog 62 on a dog-rocker 63 [which is caused to vibrate back and forth each time a type-bar12 is caused to print.

To do this, each type-bar is provided with a heel 64, which, as the-type-bar approaches the printing point, engages with a universal bar 65 to move the latter rearwardly to transmit said movement by means of a crossbar 66 thereon, Fig. 2, to a floating interponent 67, provided with a cross-bar 68 which engages with the dog-rocker 63 to move the latter against the tension of a return-spring 69; thusfreeing the loose dog, so that it may.

be moved by a spring'YO, Fig. 3, to bring it into effective relation with the next tooth 60 of the escapement wheel At the same time the fixed dogmoves into holding rel-ation with the tooth 60 just disengaged by the loose dog 61. When the type-bar leaves the platen to return to its normal position the wheel whereupon the universal but is hioug otell mounted on a bl latter moves until the loose dog 61 is arrested on the dog-rocker 63, e ter-spece movement the tygeheing su which upper-ts the bars of the eoi'respon tlve relation with s is correspono aliel movem'e said guidih 3 73, Fig. 3 secured to 73, when ino'vedq projecting ah it the universal bar 65 their ends hv u I upwardly from the versal bar.

65 is a] o moved her intermediary or" an 22-11 p werdly from he rock-she 73, iich swings u hell-crank 1 8, conhec they to eiid iv.-

the type-her segmen i L projecting of if ElhCl'iLIiiI moves the lower part of the iuiivei'sel her, tofwhich it is otell ted b 11 s 81, s part c:

sal b o The ii'oug'l 'liui'v -i*ockei' o I may 0 ilgilg FY9111" #2, Fig, 3 00111321 t 83 pivotul'y smiport Chet 8 noon wiich the l'oexei' 63 and the escepe ient wheel 5e ai'e also supported. \JeiJ eck-shaft 83 lrs two upwardly-ext o connected by t cross-her 68 pouch-t ward euc of v by liil: 8'7, e 7 ac.

,rren ecl to in with tl extending upw y from the 73061 A space-her 8 m he i d to escapement hieche.

.h down wardly-projectiiig an A 9* the recs-shaft 83 of the swing reme rock the latter and actuate-the dog-rec ei's 1 through the intei'medieryot the interponent 67, thus vibrating the loose and fixed dogs thereon, between the teethot the escepeineut wheel 55, to effect e letter-space -i ovement oi the cerriege in manner heifeinbei oi'e described. It will he understood with this 211'- i'angenient, that the escupement may be ectueted, by the space-l er, without idly actuating the universal bar 65.

'The pieteu ll may be shifted from lowercase to ug ier-ease position to facilitate typin with lower-cm e and up eiJ-cuse types 92 end 93, respectively, by su'tahle shift-keylevers 94-, of which there may he one e1- i'enged at each side ofthe machine. Each shift-key-levei 94 may be pitotziily supports Qltlllg their forward ends at shittlOG, which moves bodily iuoweid when said shift-frame 96 is actuated, thus movv1e platen 101. being ed 00 during let lilteil. Said pl s iiftin uiove'iie forwardly troiii 2 her 102 on said ph o with a couiiteiozilauce s in the Under;

i e V i .t-o it'ecilitete the shining movements of the giateu Returnspi'ings, similar to the return-springs 27 for the key-levers 16; Hwy he provided for the cese-shittdte levers 94-. 7

Y A'iibhon o ugh whi ch ribbon passes con-spools ctious oi ent all. roller the ribbon- 4 are h'iouiiteu \i which contain the iihh iugs being secured type-carrying tilLl '1; 1 9 roller 110 13 mounted done by a ribbon-vibrator lever 114, which,

when the universal bar 65 of the associated type-set is actuated, swings about its pivot 15 through the intermediary of an up wardly-projecting arm 116 on the floating interoonent 67 which actuates the do J. 3 b

rocker of the escapement mechanism. The connection between the lever 114 and the interponent 67 comprises a pin 117 projecting laterally from the lever 114, which engages in a slot 118 in the upwardly-projecting arm 116 of said interponent. Thus, when the interponent 67 is moved rearwardly during typing operations, the forward end of the ribbon-vibrator lever 114 is moved upwardly to bring the ribbon 105 into the path of the printing types 92 and 93.

The ribbon-vibrator levers 114 may be connected, one at a time, with the interponent 67 when the associated type-set is rendered effective. To do this, they are slidingly supported on their pivot 115 in the form of afulcrum-rod which is secured by ears 119 to the shift-rail 100, so that the levers 114 may be moved sidewise of the machine to connect either one with the interponent 67. To assist in moving the ribbonvibrator levers 114 with their associated type-sets, when changing from one type-set to another, there is provided for each lever 114 a bracket 120, embracing the latter, and which is secured to the associated type-bar segment 17.

To illustrate more clearly the changing from one type-set to the other and the connecting and the disconnecting of the ribbonvibrator levers 114 with the interponent or actuator 67 during such operation, let it be assumed that the type-set 10 is to be rendered effective. The operative first unlocks the type-carrying truck 19, by means of the handle 41, as hereinbefore described. He then moves the type-carrying truck 19 toward the right-hand side of the machine by means of the finger-piece 22. During the early part of this movement, the pin 117 on the ribbon vibrator lever 114, associated with the type-set 10, leaves the slot 118 in the arm 116 of said interponent, Fig. 3. During the latter part of the movement of said truck 19, as the type-set 10 approaches its effective position, the pin 117 on the ribbonvibrator lever, associated with said typeset, enters the slot 118 in the arm 116, after which the stop 49 on the truck engages with the pawl 38, to position said type-set 10, and the pawl 38 then drops into the slot 40, thus locking the type-carrying truck 19 in its changed position.

To facilitate the entrance of the pins 117 into the slot 118 of the arm 116 of the interponent 67, said pins may be slightly pointed at their free ends.

During case-shifting movements of the platen 11, the ribbon-vibrator 108 of the effective type-set moves therewith, so as to maintain the same normal relationbetween the platen and the section of ribbon at the typeguide 109. T 0 do this, the fulcrum-rod 115 for the ribbon-vibrator levers 114 is moved with the shift-rail, through the intermediary of the ears 119, during case shifting 114, and consequently the effective ribbonvibrator 108. To guide the'ribb'on-vibrator.

lever substantially parallel to itself during this movement, so that the forward end thereof raises or lowers the ribbon-vibrator 108, the slot 118 in the upwardly-projecting arm 116 of the interponent' 67 is vertically disposed and elongated, so as to allow the pin 117 on the ribbon-vibrator lever 114 to move up and down therein, thus guiding the connected lever.

It will be understood thatonly one ribbon-vibrator108 is connected with the interponent 67 at a time, and that the disconnected ribbon-vibrator 108 would have a tendency to drop relatively to the type-bar segment. To avoid this, each ribbon-vibrator 108 is provided with ears 121, bent forwardly therefrom, and which normally rest on the base of the type-guides 109, and also engage with the sides of said typeguides, so as to be guided thereby, during vibrations thereof. 1

It will further be seen that only the connected ribbon-vibrator 108 will be raised with the platen 11 during caseshifting movements of the same, the otherribbonvibrator remaining in its lowermost position; but, as the fulcrum 115 moves up during case-shifting of the platen, the rear part of the ribbon-vibrator lever 114, associated with the last mentioned ribbon vibrator, swings, thus moving the of register with the slot 118. If the operative should change from one type-set to another, while the platen is in the upper-case position, I have provided means to guide the pin into the slot 118. This may include cams 123 at either side of the arm on the interponent to guide the pin 117 properly into the slot 118, thus establishing the connec-' pin 117 thereon out v said ribbon-vibrator 108 so that the ribbon 105, carried thereby, bears the proper relation to the platen. V

To avoid lifting the ribbon-vibrator levers 114 out of engagement with their respective guide-brackets 120, when the platen is being shifted to upper-case position, I have pro vided each guide-bracket with, upwardlyprojecting ears 124. These ears are of such a length that they will retain therebetween their associated ribbon vibrator levers 114 when they are in their upper-case positions.

The ribbon 105 may be fed from one to the other of the spools 106, during the typing, by means of the downwardly-extending arm 91, comprising part of the swinging frame 82 which is actuated through the intermediar by eit i r one of the universal bars 65, as hereinbefore described. The free end of said arin has a slot 125, through which extends a rod 126 between two arms 127, projecting rearwardly from a rock-shaft 128, so that the latter may be actuated by the arm' 91, thereby vibrating a pawl 129' engaging with aratchet-wheel 130 on a main ribbon-feed shaft 131, carried by truck 19 thus causing rotary movements of the latter; said pawl 129 being mounted on an arm 132 projecting forwardly from, and secured to, said rockshaft 128. A holding pawl 133 engages with said ratchet-wheel 180 to prevent backward rotation thereof. It will be understood that the ribbon-feeding pawl 129 is vibrated back and forth, at each printing operation, through the intermediary of the type-bars 12 which engage with the universal bars 65. The rotary movements or the main ribbonfeed shaft 131 are transferred through beveled gears 13% thereon to drive the vertical countershafts 135, upon which the ribbonspools 106 are mounted, through the intermediary of. beveled gears 136 arranged at the lower ends of said vertical countershafts.

It should be understood that there are two sets of the gears 134, 136, and that only one set is in mesh at atime; and that the main ribbon-feeding shaft is slidable lengthwise in the type-carrying truck to connect either one of the gears 134: thereon, with its asso-. ciated gear 136 on the vertical counter-shaft or ribbon-spool shaft 135.

From the foregoing, it will be understood that either type-set, when in effective relation with said keys, may beefiective to actuate the ribbon-feeding mechanism, and that therod or cross-bar 126 is;carried by the type-carryingtruck 19, and is movable relatively to the downwardly-projecting arm 91, at which time the cross-bar 126 slides relatively to said downwardly-projecting arm 91 through the slot 125 in the latter.

In illustrating my invention, I have shown it as applied to the Underwood typewriting of the floating interponent 67 having an actuating lever, an actuating element, adapted to cooperate with either of said levers, and means for moving said levers and said ribbon vibrators sidewise to con- 1 nect said levers-one at a time with said actuating element and to concomitantly bring the ribbon vibrators to the printing point;

2. In a typewriting machine, the combination with a platen, of two ribbon-vibrators spaced apart'transversely of the machine, ribbon-vibrator-levers for said ribbon-vibrators, a common fulcrum for the latter, a single actuator for said ribbon-vibrator-levers, said actuator being adapted to engage with either ribbon-vibrator-lever but only one at a time, andmeans to cause a relative movement between said ribbon-vibrator-levers and said actuator to render either ribbon-vibrator efiective and to bring it to the printing point.

3. In a typewriting machine adapted to print at a single printing point, in combina tion, a plurality of ribbon-vibrators spaced apart transversely of the machine a carriage on which said ribbon-vibrators are mounted, said carriage being movable transversely of the machine to bring any one of said ribbon-vibrators to a position for use at said printing point, a lever connected with each'of said ribbon-vibrators and movable therewith transversely of the machine, and a single actuator for said levers adapted to cooperate with any one of them when the corresponding ribbon-vibrator is brought to efi'ective position adjacent the printing point. 7 i

4C. In a typewriting machine, in combination, a platen, two. ribbon-vibrators spaced apart transversely of the machine, a lever connected with each of said ribbon-vibrators to actuate thesame, projections on the adjacent sidesof the two levers, an actuating member between said levers and provided jection in case such relative movement between the ribbon-vibrators and levers and the actuating member is effected when the case-shittmechanism is in upper-case position. r

5. In a typewriting machine, in combi nation, a platen carriage, two type segments side by side transversely of the machine, a set of type-bars in each segment adapted to be swung to a point substantially at the center of the corresponding segment, a univen sal bar supported on each of said segments, a ribbon-vibrator supported on each of said segments, a segment carriage supported for novement transversely of the machine to bring either segment and the corresponding vibrator to the printing point, a lever connected to each vibrator and loosely mounted on transverse rod to be slid therealong, devices embracing said levers adjacent said rod and connected with said segment-carriage to cause the levers to move therewith, and an actuator positioned behind the printing point and adapted for operative engagement with the universal bar and the lever corresponding respectively to the segment and ribbon-vibrator brought to the printing point.

6. In typewriting machine, in combination, a platen carriage, two type segments side by side transversely of the machine, a set 01: type-bars in each segment adapted to be swung to a point substantially at the center or" the corresponding segment, a universal bar supported on each of said segments, a ribbon-vibrator supported on each of said segments, a seg1nent-carriage supported for movement transversely of the machine to bring-either segment and the corresponding vibrator to the printing point, a lever eonn'ectcd to each vibrator and loosely mounted on a transverse rod to be slid therealong, devices embracing said levers adjacent said rod and connected with saia segment-carriage to cause the levers to move therewith, an actuator positioned behind thev pri operative engagement with the universal bar and the lever corresponding respectively to the segmentand-ribbon-vibrator brought to the printing; point and a platen-carriageescapement mechanism operable by said actuator. V T

7. In a typewriting machine, the combination with a ribbon carrier and a vibrator, oi an actuator adapted to be engaged therewith, means tor shitting them relatively to tng point and adapted for each other, a type segment, and, a bracket on the segment embrac'ng the vibrator.

8. In typewriting inarhine, the combination with a ribbon carri-r and vibrator, of an actuator adapted to be engaged therewith, means for shifting-teem relatively to each other, a type segment, a case shift device on which the vibrator is pivoted, and a bracket on "the segment adapted to guide the vibrator during the case shitting operation.

9. In a typewriting machine, in combination, platen carriage, a type segment movable to and from effective position with respect to the printing point, type-bars journaled in the segment, a universal bar srop rted on the segment and operable by s2 )e-bars, a separately supported ribbon acmator actuable by the universal bar only when the segment is in effective position, and an escapernent for the carriage actuable by the actuator.

10. In a front strike typewriting machine, the combination with a type segment and a platen carriage, of type journaled in the segment, a universal bar supported on the segment'and operated by said type bars, a ribbonactuator behind the universal bar,

a rocker behind the actuator to support it, a

second rocker supporting its front end, and an escapement for the carriage operated by the actuator.

11. In a front'strike typewriting machine. the combination with a type segment and a platen carriage,'of type bars journaled in the segment, a universalbar operated by the type bars, a pair of rockers on the segment supportingthe universal bar, a ribbon. actu ator, a pair of rockers supporting said actuator, an escapement actuated each actuation of the universal bar.

12. In a front strike typewriting machine, the combination with a type segment and a platen carriage, of type bars journaled in the segment, a universal bar operated by the type bars and carried by. the segment, a separately supported ribbon actuator, an

abutment on the universal bar, a co'c' perat-v ing abutment on the actuator whereby the bar operates the actuator, escapement for the the carriage, and an abutment on the actuator adapted 1 to operate the escapement. f

' JOHN ALDHEIM,

Vvitnessesz J ENNIE P. THORNE,

CATHERINE A. NEWELL.

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