US2383259A - Typewriting machine - Google Patents

Description

Aug. 21, 1945. ,1; J. KITTEL 2,383,259

TYPEWRITING MACHINE Original Filed July 5, 1943 5 Sheets-Sheet 1 INVENTOR JOHN JI KITTEL Aug. 21, 1945. J. J. KITTEL TYPEWRITING- MACHINE Original Filed July 5, 1943 5 Sheets-Sheet 2 dis INVENTOR V J'OHNJT K/TTEL BY 6% Wu A ATTORNEYS Aug. 21,1945. J. J. KITTEL TYBEWRITING MACHINE Original Filed July 3, 1943' 5 Sheets-Sheet 4 L M W m T W E @N wmw WK Y m g ml m ,1. wE Q A RN 0 %\N J 6 saw RN mwm "w "n.

mmw lilllll. m w QNW m k i Tb M wmw N N\ =51 nun u l u u mn w Q9 mm \MM 1 N. Wad 9E q 3H1, Q fig Aug. 21, 1945. J. J. KITTEL TYPEWRITING MACHINE Original Filed July 3, 1943 5 Sheets-Sheet 5 .ing application Serial Patented Aug. 21 1945 mawnrrma, MACHINE I John Joseph Kittel, St. Albans, N. Y., assignor to Royal Typewriter Company, Inc., New York, N. Y., a corporation of New York Original application July 3, 1943, Serial No. 493,450. Divided and this application March 4, 1944, Serial No. 525,059

14 Claims.

This invention. relates to typewriting or like machines, and more particularly to machines of this class in which mechanism usually operated by manual effort is operated by power supplied by a motor or motors, under manual control.

This application is a division of my copend- Number 493,450, filed July 3, 1943. 7

An object of the invention is to provide a power operated typewriter or like machine in which the power supplying and manual control mechanism is so arranged and so interconnected with other parts of a standard or more nearly standard kind customarily embodied in manually operated typewriters that the power and control mechanism may be operatively associated with such other parts with a minimum of modification of the basic machine construction.

Another object is to provide a machine of the class referred to with improved power drive mechanism for actuating, under manual control, parts performing usual typewriter functions, especially case shifting.

moving it to one of its positions.

. actuating mechanism and carriage drive escape- Figure '7 is a detail vertical section on the line f 1-1 of Figure 6 showing a pawl and ratchet one way drive construction, drawn on an enlarged scale;

Figure 8 is a detail view in elevation showing a cam roller detent mechanism as viewed when looking in the direction of the arrow 8 in Figure 6; 1

. Figure 9 is a fragmentary view partly in elevation and partly in vertical section, fore and aft Another object is to provide ease shifting mechanism of the character stated in which the effort for moving the shifting element to one of its positions is transmitted through a fluid coupling.

A further object is to provide an improved arrangement of drive connections for transmitof the machine, showing the case shift mechanism with a shiftable type bar segment in lower case position;

Figure 10 is a fragmentary vertical sectional view taken end-to-end of the machine and showing parts of the case shiftingmechanism in lower case position;

Figure 11 is a fragmentary horizontal sectional view substantially on the irregular lines I ll I of Figure 9 and showing the parts in the same positions as are shown in Figure 9; and

Figure 12 is a perspective view of a rockable latch member forming part of the case shifting mechanism, and its pivotal mounting element.

Introduction The invention is capable of being embodied in typewriting machines of various kinds. For the purposes of illustration it is shown in connection with a typewriter the general construction and arrangement of many of the parts of which conform to the well known Royal Standardtypewriter construction.

The typewriter illustrated comprises a main' the carriage B is urged to .move in the letter spacing direction under the control of an escapement mechanism unit generally\designated D.

, The escapement' mechanism comprises a fixed frame 6 which pivotall mounts a rocker 1 carrying a flxedjdog 8 and a pivoted dog 9 e005- erable in the usual manner with an escapement wheel Ill. The wheel I II is connected through a pawl "I to a pinion ll normally in mesh with an escapement rack l2 mounted on the carriage. A universal frame l3 includes arms l4 pivoted at Iii-l5 on a frame mounted bracket 46. The universal frame is urged rearwardly by a spring I1 and includes a universal bar It adapted to be i pulled forwardly upon the depression of one of the usual key levers or the space bar. Adjustably mounted on the frame I3 is a pressure plate l9 adapted to push against a roller 'Journaled at the lower end of a spring arm 2| carried by the rocker I. When the frame I3 is rocked clockwise as viewed in Figure 2, the plate is pushes the'roller 20 so as to rock the rocker 1 and 0perate the escapement mechanism D to effect a single letter spacing movement of the carriage in the usual manner. The usualspace bar (not shown) 'havingthe arms 2| is connected by a link M to the universal frame l3.

The escapement rack I2 is mounted on a ball 22 which is pivoted as at 23 on the carriage end plates 24 and 25. Springs 23 espectively interposed between the carriage end plates and'rearwardly'extending arms 21 integral with the ball .22 normally hold the rack l2 down in engagement with the escapement pinion. i I, For permitting tabulating movements of the carriage B,

the bail 22 and the rack K2 are rocked clockwise as viewed in Figure 1 by a tabulating rack lift lever pivoted on the main fram and being formed with an ear 80 engageable with the bail 22 in the usual manner. The carriage is equipped with a tabular stop frame 3! mounting a plurality of key-settable stops (not shown);

Mechanism (not shown) cooperable with the stop fingers on the frame 3| may, for example,

be of the kind illustrated in the patent to Lewis the margin stop 36 operates a line lock lever 40 so that when the carriage is brought to rest by the center stop 39 the key levers cannot be operated. The line lock lever 40 is pivoted as at 4| on'the center stop 39 and is formed with a downwardly extending arm 42, the lower end of which is connected by a link 43 to one arm 44 of a lever 45 pivoted as at 46 on frame brackets 41. A spring 48 interposed between the lever arm 44 and a frame mounted ear 49 urges thelever 45 and line lock lever 40 to non-line locking position, movement of the parts under the urge of the spring 48 being limited by engagement of a stop projection 50 on the lever 45 with the frame A. Another arm 44 of the lever 45 is connected by a link 5| to a key lever blocking device, which in the form shown comprises a line lock plate 52 pivoted as at 53.

'I'he usual case shiftmember, in the form shown a type bar segment E, is mounted for vertical shifting 0n the frame A, and is equipped with a pivotwire 54 which mounts the usual complement of type bar members. one of which is shown at 55. Each type member 55 is formed with a short arm it connected by a link 51. to an intermediate lever 58 pivoted as at 59 on the key lever bracket carried by the frame A. The bracket 30 also mounts the key levers 6| which are pivotedon a fulcrum shaft '32 and are urged upwardly against a stop 63 by retuming-springs 64. Each key device BI is connected by a link 65 to a front lever 36,pivoted as at 61 on the frame either in typewriters in which manually applied force is relied upon for actuating the type bars, or in typewriters in which depression of a key lever controls the action of power means which applies the actual force for moving the type bars to printing position. In the illustrative embodiment depression of a key lever is utilized to disable a restraining device so as to permit power operable means to apply the efiort for moving the associated type bar.

It will be understood that a key lever 6|, the type bar 55 and associated parts shown in the drawings are representative of each of the plu-- rality of type bar actions and associated key mechanism although only one complete type bar action is shown. The description of one complete type bar action is intended to serve as a description of the other type bar actions.

The similarity of the construction thus far de-- scribed to the construction of the known Royal Standard typewriting machine will be apparent to those familiar with the art. Some other parts to be referred to hereinafter also will be recognized as being of known construction.

General description In accordance with the invention claimed herein, power operated mechanism controlled by manually operable keys supplies the effort for the performance of the case shifting operation. A

' prime mover F, preferably an electric driving motor, transmits cushioned, power through a fluid coupling slip or impositive drive device G for normally urging the carriage B in the letter spacing direction under the controlof the escapement mechanism D.

Each type bar action is loaded by power means comprising a spring 19 which urges the associated type bar to move to printing position but which normally i prevented from acting by restraining mechanism H. Means are provided for individually releasing the restraining mechanism H associated witheach key lever and type bar in response to operation of that key lever and movement of the carriage in the letter space ingdirection.

Returning of the carriage B to line starting position is effected by transmitting drive from the motor F through reversing gearing generally designated I controlled by mechanism not shown herein but which is fully disclosed in the copending parent application Serial Number 493,- 450 and disclosed and claimed in divisional apthe hubs I and IN.

plication Serial Number 525,058, died March 4, 1944.

Back spacing of the carriage through distances corresponding to a predetermined small number of letter spacing increments is eflected by driving the carriage through the reversing gearing I under control of a separate back spacing escapement mechanism unit J disclosed in the. parent application Serial Number 493,450 and disclosed and claimed in the aforementioned divisional application Serial Number 525,058, flied March 4, 1944. 7

Normally the type bar segment E is held in its upper position by mechanism generally designated K which is adapted to be released in response to depression of a shift key lever 82-for permitting the segment to be moved downwardly by gravity. The segment E is restored to its upper position by lifting mechanism generally designated L operated from the motor F under control of a shift release or reset key lever 83.

The platen C is adapted to be turned for line spacing by spring powered mechanism M also disclosed in parent application Serial Number 493,450 and disclosed and claimed in the aforementioned divisional application Serial Number 525,058, filed March 4, 1944.

Carriage driving mechanism The motor F is equipped with a shaft 80 journaled as at 55-55 in the housing 88 or the reversing gear I. The shaft 86 turns in the direction of the arrow 51 and, by means oi. a worm I82 and worm wheel I24, transmits drive through the reversing gear I to a chain gear lit which is driven in the direction of the arrow 89 for effecting carriage letter spacing travel and in the direction of the arrow 90 for returning or back spacing the carriage.

The chain gear as drives a chain 9I which in turn drives a chain gear 92 fast on a shaft 03 journaled at one end as at 94 in a frame bracket 95. Adjacent its other end the shaft is connected at 98 to the propeller element 91 of the kinetic type fluid coupling G which may be of the kind disclosed .in the patent to John J. Kittel No. 2,279,141, granted April 7, 1942. The conpling runner element 90 houses the propeller 91 and the fluid 99, and is formed with hubs I00 and IM journaled respectively in bearings I02 and W3 carried y the bracket 95. .The end of the shaft 93 adjacent the coupling G is journaled by bearings IIl I interposed between the shaft 03 and A bellows seal I05 prevents escape of fluid past the hub IN. A gear I06 secured as at I01 to the runner hub I00 meshes with a rack I08 mounted on the carriage end plates by brackets I09 and H0.

Inoperation, when the machine is conditioned for the typing of a line, the motor F drives the coupling propeller 91 through the reversing gearing I in a direction tending to transmit drive through the fluid 99 to rotate the runner 98 and gear I08 and move the rack I08 and carriage B in the letter spacing direction. The carriage can beheld at rest by the escapement mechanism D because of the impositive drive characteristics of the fluid coupling G. Whenever the escapement mechanism is operated so as to release the carriage for letter spacing travel, the fluid-transmitted effort becomes eilective for advancing the carriage. by the escapement mechanism, the cushioning effect provided by the fluid coupling G prevents the occurrence of any undesirable shock or strain.

During letter spacing operation the chain gear II is driven in the direction of the arrow 88.

For returning or back spacing the carriage, the gearing I is set to cause the chain gear 88 to rotate in the direction of the arrow This will drive the propeller '1 of the coupling G in the opposite direction, thereby reversing the direction of rotation of the gear Ill and driving the rack I08 and carriage in the reverse or return direction.

Typin mechanism The mechanism for operating and tor controlling the operation of the type bars 55 is claimed in the parent application Serial Number 493,450 and is similar in some respects to mechanism disclosed in the co-pending application of John J. Kittel, Serial Number 493,449, filed July 3, 1943. Depressing of a key lever II is not made eflective for applying manually exerted force for moving the type bar 55 on its printing stroke, but is utilized for releasing the restraint on a spring 19 connected between the intermediate lever 58 and an adjusting plate I51. pivoted as at I58 on the frame A. When released, the spring 19 contracts and rocks the lever 58 counterclockwise, thereby swinging the type bar 55 to printing position.

Depending from a curved slot I55 in the lever 58 is a link I50 piv ted at its lower end to a cam follower lever iii in turn pivoted as at I82 on the 1 frame A. The lever iti is equipped with an antifriction roller I63 which normally is held against upward movement by the restraining face I66 of a releasable bar lock keeper itb pivoted as at I56. The roller m3 also is releasably restrained against upward movement by the crest of one of the eight lobes ifi'i on a resetting member comprising a cam I58 secured to a shaft I59 journaled on the typewriter frame A by suitable hearings on supporting plates I10 and Iii. A detent roller Q12 mounted on a lever I13 pivoted as at I14 on the supporting plate H0 is urged by a spring I15 anchored on a stud H6 into contact with a detent wheel I11 secured to the cam shaft I69 by a set screw M1 for yieldably maintaining the cam I58 I counterclockwise thereby moving the keeper face When the carriage is brought to rest with the crest of a lobe I81 directly above the roller I53. Thus, both the bar lock keeper IE5 and the cam I88 normally prevent rising of the roller I 53 and therefore normally restrain the lever 58 from being rocked by the spring 19. In

order to discontinue the restraint of both the keeper I65 and the resetting member I58 and permit the spring 19 to contract and drive the type bar to printing position it is necessary to displace the restraining face I60 of the keeper I65 from above the roller I63 and also to rotate the cam I68 so as to allow the roller to move into the depression between two cam lobes IE1.

The barlock keeperl55is adapted to be rocked upon depression of the associated key SI for displacing the restraining face I64 from above theroller I83. For this purpose an arm I18 on the keeper I65 is connected by a link- 118 to the key operated lever 66. Thus, upon depression of the key BI, the link will rock the lever 55 clockwise to pull on the link I18,and rock the keeper I65 I64 away from the roller I83.

Thereafter, to enable the spring 19 to actuate the lever 58, link 51 and type ha: 55, the cam I58 is rotated one-eighth of a revolution. While the depresson between the lobe I51 last positioned above the roller I83 and the next adjacent lobe is presented above the roller the lever IBI is free to rock clockwise, Hence the spring 19 contracts and engaging a fixed part of the frame A. If the screw I19 is turned to rock the adjusting plate I51 clockriage travel.

wise as viewed in Figure 2, the springs 19 associated with the respective type bars will be subjected. to additional tension so as to be capable of swinging the type bars 56 into printing position with more force. Adjustment of the tension of the springs 19 is accompanied by a variation in the force reqi'iff''d to depress the key levers 6|, thus requiring a heav er touch to effect operation of a type bar. This is because additional tensionin of thesprings'19 causes the rollers I-83 to be held against the keepers I65 with greater force, thereby requiring additional manually applied effort for moving the keepers I85 from engagement with the rollers I83.

For operating the escapement mechanism D in response to the depression of a key lever 8|, a supplemental universal bar I88 is pivoted at I68 and is engaged by projections I8I formed respectively on thebar keepers I65. An arm I82 on the supplemental universal bar I88 is connected to the I escapement frame I3 by a pull rod I83 having its rear end hooked at I84 to embrace the rod I6 on the universal frame I3. .Thus, when a key lever 6| is depressed, the associated keeper I65 is swung counterclockwise to the position shown in Figure 2, thereby rocking the supplemental universal bar I88 counterclockwise and swinging th universal frame I3 clockwise to actuate the escapement mechanism. When the key lever is released, the springs I1 and 84 will contract to restore the parts to their, positions.

The cam shaft I69 is rotated step-by-step in response to carriage letter spacing travel and moves through one-eighth of a revolution in response to each letter spacing increment of car- Connections between the carriage driving mechanism and the cam shaft I69 in clude a gear I84 secured to the front end of a shaft I85 and meshing with the carriage driving gear I88. A gear I88 secured to the rear end of the shaft I85 meshes with a gear I81 rotatable on a shaft I88 and meshing with a gear I89 fast on a, shaft I98 journaled as at I9I and I82. A sleeve I93 freely rotatable on the shaft I98 is fast with a ratchet wheel I94 engageable by a pawl I95 carried on an arm I86 fast with the shaft I88. A spring I91 urges the pawl I95 into operative. engagement with the ratchet wheel I94. A spiral gear I98 fast with the sleeve I93 meshes witha spiral gear I99 secured to the cam shaft I69. When the carriage moves in the letter spacing direction, the gears I86, I84, I88, I 81, and I89 rotate the ratchet shaft I98 in the direction of the arrow 288 (Figure '7) and move the one way drive device I 94-I95 and sleeve I93 through one-eighth of a complete revolution for each single letter spacing movement of the carriage. Drive is transmitted from the sleeve I93 through the spiral gears I98 and I99 to rotate the cam shaft I89 also through one-eighth of a revolution for each letter spacing increment of the carriage movement.

Normally, each type bar actuating spring 19 is restrained by engagement ofthe associated roller I63 with a lobe I61 and with the associated keeper restraining face I84. When a key lever 6I is depressed, the associated keeper I85 is swimg to the position shown in Figure 2, thereby rocking the supplemental universal bar I88 and operating the escapement mechanism D. in the manner previously described. When the carriage moves in response to operation of the escapement mechanism the cam shaft I69 is rotated as explained above. As the cam lobe I81 which was in contact with the roller I63 prior to operation of the key lever 6| moves from above the roller I63, a cam depression will be presented above the roller I83 and the roller will be enabled to rise so as to permit the spring 19 to move the type bar 55 to printing position, the retreating cam lobe piloting the. type bar to typing position. The type bar will reach printing position when the cam shaft has moved through one-sixteenth of a revolution, the parts then being positioned as shown in Figure 2. During the next one-sixteenth of a revolution of the cam shaft I89, the next or following cam lobe I61 will engage the roller I63 so as to move the arm I6I downwardly, thereby restoring the type bar 55 to its position of rest, reloading the spring 19, and enabling the restraining face I64 of the keeper I85 to move over the roller I83. The

parts then will have been returned to their normal positions and the escapement mechanism D will have arrested the carriage and the cam shaft I 69.

As shown in Figure 2, the shape and size of the cam I88, the mounting of the type member 55, and the connections between the roller I 83 and the type member 55 are so interrelated that the roller I83 is out of contact with the cam I88 when the type member 55 reaches typing position. Thus the cam I68 is effective for restrain ing or piloting the type member during part of the typing stroke but not during the last part of the stroke. spring .19 can be effective for varying the force of the type impact.

In the event it is necessary for a service man to perform a type bar aligning operation, requiring the manual raising and holding of individual type bars in or near printing position, the cam shaft I89 is set to position depressions between cam lobes I81 of each cam I68 directly above the rollers I63 associated with the respective type bars 55. I69 in this position, the set screw I11 is loosened and the detent wheel I11 is slid to the left, as viewed in Figure 6, and is turned together with the cam shaft I69 until a pin I11 on the detent wheel enters a hole I11 in the supporting plate I18. The settable means I11 I11 will position the cams I88 with cam depressions immediately below the rollers I83 as shown inFigure 2, that is with the cams displaced angularly one-sixteenth of a revolution from the normal position. Any type bar 55 may then be manipulated by hand after releasing the associated bar lock keeper I85 by depressing the key lever 6|.

Case shifting mechanism The case shifting segment member E is biased to a. lower position by its own weight but normally is held in its upper position for the typing of small letters by the releasable means K including two links 288 pivoted to the segment as at 28! and pivoted as at 282 to a shift frame generally designated 283. The shift frame 283 comprises arms-284 and 285 connected to a tie rod 286 and respectively being fitted with pintles Consequently the adjustment of the 1 For setting the cam shaft 23! and 233 journaledin'frame bearings 239 and 230. The shift frame arm 234 is formed with a vertical extension 29| equipped with a cam follower roller, 292 normally engaged by the cam and 293 of a secondary release latch or interponent 294 pivoted on the tie rod I93 and on a shouldered screw 295 (see Figures and 11) extending through the mounting plate Ill and into the tie rod I33.

The interponent latch 294 comprises spaced arms 236 and 291 connected by a cross bar 293, and an extension 299 on the arm 291. A spring to rock the lever 326 clockwise as viewed in Figure 300 interposed between the extension 299 and a post 30l on the mounting plate |1| urges the latch 294 to rock clockwise from the normal position' shown in Figure 1. However the latch 294 normally is held in its Figure 1 positionby engagement of a roller302 on the arm 293 with a retainer 303 on a segment release latch or retainer device 304 which is pivoted on a headless screw 305 threaded at 309 in the frame A. A link 301 is pivoted as at 303 to the shift key 32 and is pivoted at 309 to the segment release latch 304. Asshown clearly in Figure 12, the release latch 304- comprises spaced arms H0 and 3 connected by a cross bar 3|2, the retainer 303 extending upwardly from the arm 3l0.

In operation, when the shift levei-- 82 is depressed and rocked counterclockwise as viewed in Figure 1, the link 301 will be retracted to rock the segment release. latch 304 clockwise to the position shown in Figure 9. With the retainer 303 in this displaced position, the roller 302 can move downwardly, thereby enabling the spring 300 to rock the secondary release latch 29.4 to the position shown in Figure 9. This will displace V 82 is released it will be returned to its normal position by a spring 82*.

The shifting of the segment E is cushioned by shock absorbers provided at each end of the segment andreachcomprising a pin 3|! having threaded connection with the segment as at 3"! and passing through a frame lug 319. Cushioning springs 320 are mounted on each pin 31'! both above and below the associated lug 3|9, the positions of the springs being variable by adlusting nuts 32L Means actuated by power supplied from the motor F through the fluid coupling G are provided for returning the segment to its upper position. A resetting cam 322 is keyed as at 323 to the cam shaft "59 so as to rotate therewith and to be slidalble axially thereon. A spring 324 interposed between the mounting plate Ill and the resetting cam 322 yieldably urges the cam to a normal position shown in Figure 11 wherein the cam is displaced axially out of the plane of a cam follower roller 325 mounted on the arm 291 on the secondary release latch 294. During normal typing operation the cam 322 rotates with the cam shaft I53 but has no effect upon the roller 325.

For shifting the cam 322 into position for cooperation with the roller 325, a lever 326 pivoted as at 32! on a bracket 328 is equipped with a pm 329 extending into a groove 330 in the hub of 292 to the right as viewed in Figure 9 to rock the 11. The pin. 323 will then shift the cam 322 into the plane of the interponent roller 325. While the shirt reset lever 83 is held depressed the operator strikes a key lever lil. This effects a letter spacing carriage step movement accompanied by a step rotation of the shaft Hi9 and the resetting cam 322. When the camshaft and cam 322 are rotated a lobe on the cam will raise the roller 325, thereby rocking theinterponent 294 counterclockwise from its Figure 9 position to its Figure 1 position. The cam end 283 will force the roller shift frame 283 back to its normal position as shown in Figure 1. The segment E will be returned to its upper or normal position just a little before the type bar reaches the printing point. The spring 32 will then return the shift .key 82 and the segment release latch 304 to their normal positions with the retainer 303 again disposed under the roller 302 on the secondary latch 294,

the parts then all being set for the typing of small letters with the segment E supported in its upper position. The cam-urging spring 321 acts through the cam 322, lever 326, and link 33| to return the shift release lever 33 to its normal position.

Safety lock mechanism Means claimed in the copending divisional application Serial Number 525.060, filed March 4, 1944, are provided for preventing operative depressing of more than one key lever 6| at the same time, thereby making it impossible for two or more type bars to collide and/or jam. The usual and rocks the blocking part 52 rearwardly from its normal forwardly offset position to the position shown in full lines in Figures 2 and 3. The

line lock plate 52 will then be disposed directly under the toes 335 of the aligned key lever abutments 334 so as to prevent operative downward movement of the other key levers. This operation of the safety lock does not disturb the line lock lever 40 because the link 5| interposed between the line lock plate 52 and the line lock lever 40 has its front end connected to the line lock plate 52 by a one way drive connection including a part 335 of the link 5| and a slot 331 in the line lock plate. Thus rearward movement line locking plate caused by depression of a key lever 6| will not move the link 5|.

The safety lock device prevents the operation of more than one key lever when the motorF is running and also prevents the depressing of more than one key lever when the motor is shut off. Thus damaging of the type bar mechanism is avoided.

- Ribbon spool drive The usual ribbon spool driving shaft 338 is driven from the motor F through the fluid coupling G and gearing I. A pinion 339 meshes with the gear Hi6 and transmits drive in one direction only through an enclosed ratchet device 340 to a shaft all which is connected through a uni-- versal coupling 342 to the ribbon spool driving shaft 338. a

' Summary It is apparent that mechanism embodying the' invention disclosed herein provides for the smooth performance with minimum manual effort of of which need not be changedat all.

The fluid drive connection between the prime mover F and the type bar spring resetting mechanism, the traveling carriage, and the case shifting mechanism provides for both rapid and smooth operation free from undesirable shocks and noise. The flexible, cushioning drive transmitting characteristics of the fluid coupling are especially advantageous in a construction in which the power for performing several typewriting functions is supplied by a single motor or prime mover. There always is available an adequate source of smooth, cushioned power for the performance of. any one or the simultaneous performance of more than one operation.

The mechanism described with reference to the drawings embodies the invention in the form now preferred, but it is evident that changes may be made without departing from the invention as defined in the claims.

I claim:

1. In a typewriter or like machine, a case shift member movable selectively to two positions and being biased toward one of said positions; a cam follower connected to said member; a cam en-- gageable with said follower and,normally positioned to maintain said member in the other of said positions against said bias; a shift key;

means responsive to operation of said shift key for moving said cam to enable said follower to move under the urge of said bias and to thus permit movement of said shift member to said one of said positions; a shift reset key; and power driven means responsive to operation of said shift reset key for actuating said camto move said follower against said bias and to thereby move said shift member back to said other of said positions.

2. In a typewriter or like machine, a case shift member movable selectively to two positions and being biased toward one of said positions; a cam follower connected to said member; a cam engageable with said follower and normally positioned to maintain said member in the other of said positions against said bias; a retainer device for releasably holding said cam in its normal position; a shift key connected to said retainer device and being op rable for moving said retainer device to release said cam and to thus permit movement of said shift member under the urge of said bias to said one of said positions; a shift reset key; and power driven means responslve to operation of said shift reset key for actuating said cam to move said follower against said bias and to thereby move said shift member back to said other of said positions.

3. In a typewriter or like machine, a case shift member movable selectively to two positions and being biased toward one of said positions; a first rockable member connected to said case shift member; a cam follower on said first rockable member; a second rockable member; a cam on said second rockable member adapted when in normal position to engage saidfollower for holding said shift member in the other of said positions; a roller on said second rockable member; a third rockable member having a retainer face normally engaging said roller for holding said second rockable member in its normal position; and key controlled means for rocking said third rockable member topermit movement of said roller and said second and first rockable members and consequent movement of said shift mem- I ber to-said one of said positions.

4. In a typewriter or like machine, a case shift member movable selectively to two positions and being biased toward one of said positions; a first rockable member connected to said case shift member; a cam follower on said first rockable member; asecond rockable member; a cam on said second rockable member adapted when in normal position to engage said follower for holding said shaft member in the other of said positions; a roller on said second rockable member; a third rockable member having a retainer face normally engaging said roller for holding said second rockable member in its normal position, key controlled means for rocking said third rockable member to permit movement of said roller and said second and first roc able members and consequent ,movement of said shift member to said one of said positions; 'and key controlled powerdriven means for moving said second rockable member back to normal position to thereby cause said cam to'drive said follower and said first rockable member for moving said shift member back to said other of said positions.

5. In a typewriter or like machine; a case shift member movable selectively to two positions and being biased toward one of said positions; and mechanism for moving said member from said one of said positions to the other of said positions comprising an interponent operatively connected to said shift member, a follower on said interponent; a shaft; a cam constrained to rotate with said shaft but being movable axially thereon into and out of position for cooperation with said follower for actuating said interponent; means for rotating said shaft; and key controlled means for shifting said cam into and. out of position for cooperation with said follower.

6. In a t: pewriter or like machine; a case shift member movable selectively to two positions and being biased toward one of said positions; and mechanism for moving said member from said one of said positions to the other of said positions comprising an interponent operatively connected to said shift' member, a follower on said interponent; a shaft; a cam constrained to ro-' tate with said shaft but being movable axially thereon into and out of position for cooperation with said follower for actuating said interponent; a spring yieldably holding said cam out of its position of cooperation with said follower; key actuated mechanism for shifting said cam into said position; a motor; and connections including an impositive drive fluid coupling said motor and said shaft.

7. In a typewriter or like machine, a case shift member movable selectively to two positions and being biased toward one of said positions; a flrst rockable member connected to said case shift member; a cam follower on said first rockable member; a second rockable member; a cam on ,said second rockable member adapted when in normal position to engage said follower for holding said shift member in the other of said positions; a roller on said second rockable member; a third rockable member having a retainer face normally engaging said roller for holding said second rockable member in its normal position; key controlled means for rocking said third rockable member to permit movement of said roller and said second and first rockable members and consequent movement of said. shift member to.

said one of said positions; a motor driven shaft; a cam follower on said second rockable member; a resetting cam constrained to rotate with said shaft but being movable thereon into and out of position for cooperation with the cam follower on said second rockable member for actuating the latter to; move said shift member to said other of its positions; and key controlled means for shifting said resetting cam into and out of its position for cooperation with said cam follower. 8. In a typewriter or like machine, a set of printing members; key-controlled power means for moving said printing members to printing position; means for. retracting said printing members from printing position; a case shift mem-' ber movable selectively to two positions; releasable means for holding said case shift member in one of said positions; shift control means for reing effective for moving said printing members to a printing position independently of transmission of drive by said fluid coupling shift reset control means for effecting transmission of drive from said motor through said fluid coupling to actuate the returning means and to thus move said case sh'ift member to said one of said positions; and means for moving 'said releasable means to again hold said case shift member in said one of said positions. v

9; In a typewriter or like machine, a set of printing members; key-controlled power means for moving said printing members to printing position; means for retracting said printin members from printing position; a case shift member movable selectively to two positions and being biased toward one of said positions; latch means for holding said case shift member in the other of said positions; shift key-controlled means for releasing said latch means to enable said case shift member to be moved by said bias fecting transmission of drivefrom saidmotor through said coupling to actuate said returning means and to thus move said case shift member to said other of said positions; and means for then moving said latch means to again hold said case shift member in said other of said positions.

10. In a typewriter or like machine, a set of printing members; key-controlled power means for moving said printing members to printing position; and means for retracting said printing members from printing position; 'a case shift member movable selectively to two positions and being biased toward one of said positions; latch means for holding said case shift member inthe other of said positions; shift key-controlled means for releasing said latch meansto enable said case shift member to be moved by said bias \to said one of said positions; returning means for moving said case shift member from said one of said positions to said other of said positions;

a motor; a kinetic type fluid coupling between said motor and said returning means, said power means being effective for moving said-printing members to printing position independently of 5 transmission of drive by said impositive drive coupling shift reset key-controlled means for effecting transmission of drive from said motor through said coupling to actuate said returning means and to thus move said case shift member to said other of said positions; and means for then moving said latch means to again hold said case shift member in said other of said positions. 11. In a. typewriter or like machine, a set of printing members; key-controlled power means :15 for moving said printing members to printing position; means for retracting said printing members from printing position; a case shift member movable selectively to two positions and being biased toward one of said positions; latch means for holding said case shift member in the other to said one of said positions; returning means for moving said case shift member from said one of said positions to said other of said positions; a motor; an impositive drive coupling between said motor and said returning means, said power means being effective for moving said printing members to printing position independently of transmission of drive by said impositive drive coupling shiftreset key-controlled means for efof said positions; shift key-controlled means for releasing said latch means to enable said case shift member to be'moved by said bias to said one an impositive drive coupling between said motor and said returning means; key actuated means for controlling said returning means, said power means being effectiv for moving said printing members to printing position independently of transmission of drive by'said impositive drive coupling shift reset key-controlled means for effecting transmission of drive from said motor through said coupling to actuate said returning means and to thus move said case shift member to said other of said positions; and'means for then moving said latch means to again hold said case shift member in said other of said positions.

12. In a typewriter or like machine, a set of printing members; key-controlled power means for moving said printing members to printing position; means for retracting said printing members from printing position; a case shift member movable selectively to two positions and being biased toward one of said positions; a cam follower connected to said case shift member; a cam engageable with said follower and normall positioned to maintain said case shift member in the other of said positions; a shift key; means responsive to operation of said shift key for effecting movement of said cam to enable said follower to move and to thus permit movement of said case shift member to said one of said positions; a shift reset key; a motor; and means controlled by said shift reset key and including an impositlve drive fluid coupling for transmitting drive from said motor to said cam'for moving said case shii't member back to said other of said positions, said power means being eflective for moving said printing members to printing position independently of transmission or drive by said fluid coupling.

13. In a typewriter or like machine, a set'bf printing members; key-controlled power means for moving-said printing member to printing position; means for retracting said printing members from printing position; a case shift member movable selectively to two positions and being biased toward one of said positions; and mechanism for moving said case shift member from said one of said positions to the other of said positions comprising an interponent operasaid follower for actuating said interponent to move said case shift member; a motor; driving connections including an impositiv drive fluid coupling between said motor and said cam; and

thereby move said case shift member to said other of said positions, said power means being effective for moving said printing members to printing position independently of transmission of drive by said fluid coupling.

14. In a typewriter or like machine, a set 01' printing members; key-controlled power means for moving said printing members to printing position; means for retracting said printing members from printing position; a case shift member movable selectively to two positions; a spring partially counterbalancing the weight of said case shift member but not sufllciently to prevent said case shift member from moving by gravity to its lower position; lifting means including a motor, and an impositive drive fluid coupling for transv mitting drive from said motor to said case shift member for moving said case shift member to its upper position; releasable means for holding said case shift member in its upper position; and key means for controlling said lifting means and said releasable means, said power means being eilective for moving said printing members to printing position independently of transmission of drive by said fluid coupling.

JOHN JOSEPH KIII'EL.

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