US1804189A - Typewriting machine - Google Patents

Description

y 1931. R. VON REPPERT TYPEWRITING MACHINE 2 Sheets-Sheet 1 Filed Sept. 18, 1928 INVENTORI y 1931. R. VON REPPERT 1,804,189

TYPEWRITING MACHINE Filed sept. 18, 1928 2 Sheets-Sheet 2 3 Patented May 1931 UNITED" STATES PATENT OFFICE j momma vox nmrnm', or marrow), connnc'rrcur, assrenon mo nnnawoon nnuczrr rrsnnn count or NEW YORK, 1v. Y., A coarona'rron or DELAWARE mnwnrrrim mom Application filed September 18,- 1928. Serial No. 306,698. r

lustrated is durable and ositive in opera-- tion, and can .be caused to ction by a very light pressure on the keys, and has other ad'- vanta e's.

19. A eature of this invention lies in the smoothness with which the load is picked up by the power drum or roller when a type-bar 1gp'eration is started by the depression of a ey. r

Another feature lies in an automatic increase of friction-inducing pressure between a pendant and power-rollerafter a key has been depressed, whereby a result requiring considerable pressure is attained by a very apron 21 and act as stops. The apron is at 2 light pressure on the actuating key.

Other features and advantages hereinafter appear. Inthe accompanying drawings, 1

Figure 1 is a vertical'crossssectional view of a typing. machine, drawn partly in outline, and showing the power-driven typemechanism applied thereto, and with the parts in normal positions.

Figure 2 shows the key-actuated parts of the power-drive just after the key has been depressed, and wherein the pressure of the pendant against the power-roller has been automatically increased through cam-action. Figure 3 is a perspective view, showingihe key-actuated partsof the power-drive in nor.-

mal positions and partially assembled on the side frames which support them.

Figure 4 is a cross-sectional view through the lower portion'siof a e'writer-frame, and shows, in front elevation, a .power roller', gear-case and motor.

Figure 5 shows, in side elevation, all the elements of a power-driven typing action after the type-bar has struck the platen, and

been reset to normal, and the pendant is free .to be withdrawn in the direction o the 'arrowthereon. In this view also the key free to be reset by its sprisg as soon as the operwherein. three spring-connected; levers have Referring to the drawings, 10 represents generally the main frame of a power-driven. typewriting and computing machine, having main levers 11 fulcrumed at 12, which operate bell-cranks 13, to swing type-bars 14 against a platen 15.- The latter is mounted in a usual carriage 16, sliding on rails 17 and has a universal bar-18 which operates the escapemen't-mechanism, not shown. Also there is a stop-bar '19, on which the typebars lie when inert 7 At the front of the main frame are numeraland alphabet keys 20, guided by holes in an apron 21, and loosely pivoted at 22 t0 bell cranks 23, which are rockably mounted on rods 24 supported by side frames 25. The bell-cranks 23 are spaced on the shafts between pinned collars, and have'upwardlyextending ends or stops 26, 'which abut the inner frames are attached to the mainframe through set screws 29 passing through elongated slots 30, which permit adjustments'of said side frames.

On the lower right flange of the main framelO is a boss 31, as shown in Figure 4. This bossforms a bearing for one end of a driven shaft or power-roller 32, which at its opposite-end passes througha cut-out in.

said frame,and is journaled in a boss 33 carried bya gear-case 34. The power-roller is connected within the gear-case to a wormear 35, rotated by a worm 36, which is driven y a motor 37. The latter is attached-to the main frame 10 by set screws 38, while thear-case is attached to the same frame through bolts 39, and spacing sleeves or bosses 40. 1

The power-roller '32 has V-shaped annular grooves 41, which are engageable by pendants 42, having double beveled edges 43 that fit said grooves; The pendants. are plvotally suspended at44, on themain ortype-bar operating'jlevers 11, have an edge 45 partly cut 'awayto form a cam 46, and also have rounded-ofiends, as at v47. Thependants are 'ded at their lower ends bysaid grooves hifi their upper ends are held inahgnme'nt through the main levers 11, which can slide in slots 48. The. latter are equidistant in a comb-plate 49, which is attached to the main frame by set screws 50.

Pivotally connected to the bell-cranks 23 are links 51, which, at their other ends, are pivoted in one end of rockers 52. The latter are rotatable on a shaft 53, which is fixed in the side frames 25. The rockers arekept equidistant by spacing-Washers 54, and, as a unit, are positioned through various collars 55 which are provided with set screws. At the lower nd said rockers carry pawls 56, which are pivotally mounted thereon by studs 57. The pawls have stops 58 which normally abut pins 59 carried by the rockers. The

pawls also have ears 60 engaged by contractile springs 61, which are hooked through a cross-bar 62, supported by said inner frames. The pawls can engage intermediate levers 63 rotatably mounted on a shaft 64, which is carried by the side frames 25. The interme diate levers 63 have latch-surfaces 65, locking edges 66, escapement surfaces 67, recesses 68, ears 69, and ends 70 which are attached to contractile springs 71. Said levers are positioned to register with the pawls 56, are spaced by washers 72, and may be held on the shaft 64 through collars with set screws. not shown. .When inert, the intermediate levers normally rest against a stop-bar 73, which isfastened to said side frames.

On a shaft 74, which is supported by the side frames 25, are rotatably mounted pressure levers 75, which have hubs or spacers 76, and are positioned on the shaft by collars 77 having set screws. At their upper ends 78 the pressure levers are attached to the aforementioned springs 71. At their lower ends said levers have an enlargement or roller 79 which is attached by a stud; The rollers register with the pendants 42, while the pressure levers 75 register with the intermediate levers 63. The respective upper ends of the two sets of said levers may be offset slightly, and are kept a fixed distance apart by spacing-pins 80, which rideinside of the springs 71. The spacing of said levers is adjustable accpirding to the lengths of the spacing-pins use Connected to the intermediate levers 63, by contractile springs 81, are latch-levers 82. These are rockably mounted ona shaft 83, which is carried by the side frames 25.. The latch-levers are spaced apart by washers and are held as a unitby collars having set screws. The latch-levers when positioned are engageable by the pendants 42, the pawls 56 and the intermediate levers 63. The latch-levers have a pendant-driven arm 84, a latch-arm 85 and a pawl releasing arm 86. The latter has a rounded .end,.while all engaging surfaces are smoothed off to slide easily.

In Figure 1 are shown stems 87, which are pivoted on such main levers 11 as are operable by the digit-keys. Said stems, as drawn, are positioned for connection to a totalizer, not shown. These stems may also be suspended from another point on the main levers when this invention is used with a computing machine which underlies the typewriter. As this invention refers particularly to power-driven type-bars, said stems 87 have not been shown in Figures 2, 3 and 5. Also, as is common, lock-stems, not shown, may be attached to the main levers 11.

l/Vhen using this invention the parts aforementioned will first lie as shown in Figure 1, and the motor will have been started to continuously rotate the power-roller in the" direction-shown by the arrow thereon. As soon as a key is depressed its bell-crank 23 and link 51 will rotate a rocker 52, and a pawl 56 will abut and slide up the esca ement surface 67. During the actuation o the rocker 52, a pin 59 will abut a stop 58 and hold the pawl against the pull of a spring 61.

When the key has been fully depressed, said rocker 52'will abut the stop-bar 73. The pawl in the meantime will have swung the intermediate lever 63. This slides the latchsurface to a position where the latch-arm 85, through its spring 81, will abut the locking edge 66, and hold the intermediate lever 63. The latter in the meantime, through the end and through the spring 71, pulls on, and swings, the upper .end 78 of the pressure lever 75. The lower end or roller 79 of the pressure lever will then push against the pendant 42. Thelatter, through its beveled edges 43, will then engage one of the grooves 41 of the power-roller 32. The pendant will immediately be frietionally pulled down, whereupon its cam 46, through the roller 79, swings the pressure lever 75, to stretch the spring 71, and thereby force the pendant 42 to a still tighter engagement wlth said groove. The pendant and levers just described willthen lie in the positions shown by Figure 2. I

As the pendant is still further pulled down by the power-roller, it will abut and swing down the power-arm 84 of the latch-lever 82. This unlatches the latch-arm 85 from the locking edge 66, and disengages the levers 63 and-82. Concurrently, the releasing arin 86 will raise the pawl 56 from engagement with the escapement-surface 67. The pawl can then enter the recess 68, which permits the lever 63 to be pulled back, by the coacting springs 71 and 81, to abut the stop-bar 73. During this releasing operation the parts will assume the positions shown in Figure 5.

As soon as the pendant is released, the associated springs 71, 81 and 88 will return the pressure lever, the pendant, the latch-lever and the intermediate lever to normal positions, as shown in Figure'l. Concurrently, the spring 61 has restored the pawl 56 to a 63 and 75 from "by the aforesaid spring 71. Were this to re-- normal position against the pin 59 through release of the key.

- The spacingin 80 will prevent the levers being pulled too near together sult, the roller 79 might still abut the pendant,'and the latter mightstill remain engaged by the groove 41., Through the tension of the spring 81 the power-arm, when depressed, tends to push the pendant away from the power-roller, through anangular engagement with the rounded end 47. This-helps to release the pendant from the groove.

When the pendant releases itself, it will have caused an upwardly-swung type-bar to be stopped by the platen. The release of the pendant is so timed that no strain will be met by the type-bars when so stopped. -After stoppage, the type-bars are restored through the springs 88. I

hen the depressed keys are released, the springs 61 in acting to restore the rockers 52 and pawls 56, will also restore said keys to normal position through the links 51. The

keys are kept from rising above said position through the stops 26 on the bellcranks 23. 1

As above explained, an automatic increase of friction is set up to insure an increased" driving force. This increased driving force will readily overcome the resistance met in actuating the typing action of a typewriter.

This automatic overcoming of resistance therefore, relieves the operator from the necessity of exerting an undue pressure on the keys. This latter benefit becomes even more I apparent when operating a combined computing machine which has additional mechanism to be actuated. p 5

After the manual initiation ofa cycle of operation the cycle is completed automatically, as described, and the pendants and springconnected'levers are restored to normal. This occurs irrespective of. the release of a key, which is restored by a separate spring when the finger is removed. The speed of an operator therefore does not afiect the speed of the power-driven type-bars, which will always function to insure a uniform and proper .imprint of a type against a work-sheet.

When a key is depressed its initial thrust is cushioned by the light tension of a spring A further result of this cumulative tension is to gradually increase the friction between the pendants and thefrotating power-roller.

The normally-inert-pendantstherefore may be gradually put in motion. The latter bewith aninitial slippage between the pendants and said roller, which is gradually overcome. The initial friction occurs on the lower and narrower end of the pendants, and is suflicient to move the pendants to where their card engages the rollers on the pressure levers. The friction then is automatically increased, as previously explained. The re- .sult is to put inert members into motion smoothly, and without strain.

The springs 61 and 81 that cushion the depression of the keys also cushion the stoppage of the downwardly-traveling pendants when the latter engage the power-arms 84. Through the cushioning of the key and pend- .ant actions therefore, sharp blows are avoided, which minimizes the pound or noise transmitted to a stand or table top.

This invention permits variation of pressure on the keys without adverse results. A heavy pressure is automatically reduced before stoppage, while too light a pressure merely'fails to actuate a type-bar, an indexing mechanism, or both. When properly adjusted, a too light pressure cannot set an index-pin without an associated type-bar striking the platen, or vice versa. Errors in computing are therefore avoided. The speed of the power-roller canbe varied mechanically or electrically, to function with machines having a few or many parts to be put in motion- The key-action and associated levers may all be relatively adjusted on the side frames, and the assembled unit may then be adjusted in relation to the powerroller. v

.Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others. 05

Having thus described myv invention, I claim: I

1. In a machine of the character described, the combination of a constantly-rotating power-roller, a typing mechanism COIIIPI'IS ing a friction pendant .adapted to be operatively connected to the power-roller for actuation thereby, a pressure lever, a pressure roller pivoted on the pressure lever and adapted to be pressed against the pendant to es.- tablish operative connection between the pendant and the power-roller, .a set lever adapted to be set in effective position to induce typing operation, a spring connected to the set lever tending to hold it in normal position,' a lock to lockthe set lever in .efiec- -tive position, a spring connecting the set lever to the pressureilever to actuate the pressure lever through the medium of'the spring whenever the set lever is set in effective position, and a key-operated mechanism to set the set lever. in effective position and induce ac- I tuation of the typing devices.

.2. In amachine of the character described,

izs

power-roller, a typing mechanism comprising a friction pendant-member adapted to be operatively connected with the power-roller for actuation thereby, key-operated means to move the pendant-member into operative connection with the power-roller and comprising a spring, through which movement is transmitted from the key to the pendantmember, to initiate movement of the pendantmember, and a cam on the pendant'memher to tension the spring upon movement of the pendant-member, to thereby increase the pressure between the pendant-member and the power-roller and increase the power transmitted to the pendant-member from the power-roller.

3. In a machine of the character described, the combination of a constantly-rotating power-roller, a typing mechanism comprising a friction member, a pressure mechanism to press the friction member into contact with the power-roller, a key-mechanism v adapted to engage and set the pressure mechanism in efiective position, a detent to' lock the pressure mechanism in effective position, and means connected to the typing mechanism and adapted to be effective in a prede termined position thereof, to disengage the key-mechanism and release the detent from the pressure mechanism to free it for resetting movement.

4. A machine of the character described, comprising a constantly-rotating powerroller, a typing mechanism comprising a friction member adapted to be frictionally con nected withthe power-roller for-actuation thereby, a pressure member to press the friction member into contact with the powerroller, a set lever connected with the pressure member and adapted to be set in effective-pm sition for typing operation, a detent to lock the set lever in effective position, a keymechanism comprising a spring-held detent to set the set lever in effective position, and means connected to the typing mechanism and effective at a predetermined position thereof to release the detent for the set lever and the detent of the key-mechanism, to thereby release the friction member from the power-roller for resetting movement.

5. In a machine of the character described,

a constantly rotating power-roller, a typing mechanism comprising a main lever, a friction pendant pivoted tothe main lever and adapted to be operatively connected with the power-roller for actuation thereby, a pressure-lever to press the friction pendant into co-operation with the power-roller, a setlever adapted to be set in effective position, to induce typing operation, a spring connecting the set-lever with the pressure-lever to transmit movement from the set-lever to the pressure-lever, through the medium of the spring, a key-operated mechanism to set the set-lever in effective position, a lock-detent to lock the set-lever in effective position, a cam on the pendant, to be effective upon move ment of the pendant to actuate the pressurelever and increase the pressure against the pendant, and means connected to the typing mechanism and eifective in a predetermined position thereof, to .release the lock-detent for the set-lever and to disconnect the keymechanism from the set-lever, to thereby disconnect the pendant from the power-roller for resetting movement.

6. In a machine of the class described, the combination with a constantly rotating roller, a typing device, a lever for driving said typing device, a key disconnected from said type-driving lever, a pendant mounted on said type-bar-driving lever and engageable with the rotating roller, and a pendant-controlling lever having means engageable with said pendant to swing the pendant into engagement with the rotating roller to be reciprocated thereby and drive the typing device, of intermediate mechanism connected to the key, and connectible with the pendantcontrolling lever to set up a type-device driving pressure between the pendant and the rotating roller, by the power derived from the depression of the key, means operable by the depression of the key to maintain the key-setup driving pressure independently of the key, and means carried by said pendant and operable during its reciprocation by the roller, to strengthen the key-set frictional engagement between the pendant and roller for a more positive typing action.

7 In a machine of the class described, the combination with a constantly rotating roller, a typing device, a lever for. driving said typing device, a key disconnected from said type-driving lever, a pendant mounted on said type-bar-driving lever and engageable with the rotating roller, and a pendant-controlling lever having means engageable with said pendant to swing the pendant into engagement with the rotating roller to be reciproca-ted thereby and drive the typing device, of intermediate mechanism connected to the key, and connectible with the pendantcontrolling lever to set up a type-device driving pressure between the pendant and the rotating roller, by the power derived from the depression of the key, means operable by the depression of the key to maintain the keyset-up driving pressure independently of the key, means carried by said pendant and operable during its reciprocation by the roller, to strengthen the key-set frictional engage ment between the pendant and roller for a more positive typing action, and means engageable by the reciprocating pendant, operable to release the pressure maintaining means to release the'pendant from its frictional engagement with the roller prior to tilt; full typing reciprocation of the pendan said type-bar-driving lever and engageable with the rotating roller,' and a pendant-controlling lever having means engageable with said pendant to swing the pendant into en-- gagement with the rotating roller to' be reciprocated thereby and drive the typing device, of mechanism to enable the keyto operate the pendant-controlling lever and force the pendant into a frictional engagement with the'roller by the depression of the key, said mechanism including a rocker connected to the key, a lever intermediate the rocker and the pendant-controlling lever to be driven by the rocker, and a connection between the intermediate lever and the pendant-controlling lever, operable to convey the key-power to the frictionally driven pendant.

9. In a machine of the class described, the

' combination with a constantly rotating roller, va typing device, a lever for driving said typing device, a key disconnected from said type-driving lever, a pendant mounted on said type-bar-driving lever and engageable with the rotating roller, and a pendant-controllinglever having means engageable with said pendant to swing the pendantinto engagement with the rotating roller to be reciprocated thereby and drive the typing device, of mechanism to enable the key to operate the pendant-controlling lever and force the pendant into a a frictional en agement with the roller by the depression 0% the key,

' 'said mechanism including a rocker connected to the key, a lever intermediate the rocker. and the-pendant-controlling lever to be driven by the rocker, and a connection between the" intermediate lever and the pendant-controllinglever, operable to convey the key-power to the frictionally-driven pendant, said connection including a spring secured to the ends of thetwo levers and a spacing-pin between said levers operable. to establish a workable tension for the spring to move the. pendant into contact with the roller, the spring then becoming flexed by the key-power to convey a pressure against the pendant to frictionally engage the roller. 1

10. In a machine of the class described, the

I combination with a constantly rotating roller,

a typing device, a lever for driving said typin devic'e, a key disconnected from said typerivinglever, a pendant mounted on said type-bar-dr'i lever and engageable with the rotatingro er, and a pendant-controlling lever, having means engageable with said pendantto swing the pendant .into en-.

gagement with the rotating roller to be reciprocated thereby. and drivethe typing device, of intermediate mechanism connected to the key, and connectible with the pendantcontrolling lever to set up a type-device driving pressure between the pendant and the rotating roller, by the power. derived from the depression of the key, said mechanism including aflexible connection with the pendcombination with a constantly-rotating roller, a typing device, a lever for driving said typing devlce, a-key disconnectedfrom "said type-driving lever, a pendant mounted on said type-bar-driving lever and engageable with the rotating roller, and a pendant-controllin lever having means engageable with sai pendant to swing the pendant into en agement with the rotating roller to-be recipro- 'cated thereby and drive the typing device, of.

intermediate mechanism connected to the key, and connectible with the pendant-controlling lever to set up atype-device driving pressure between the pendant and the rotating roller, by the power derived from the depression of the key, and latching means released by the depression of'thekey and operable to interlock with the key-set-up mechanism and maintain a driving pressure forthe pendant independently of the key.

: 12. In a machine of the class described, the combination with a constantly rotating roller, a typing device, a lever for driving said typing device, a key disconnectedfrom said type-driving lever, a pendantv mounted on said type-bar-driving lever-and engageable with the rotating roller, and a pendant-controlling lever having means engageable with key, and connectible with the. pendant-con trolling lever to set up a type-device driving pressure between the pendant and the rotating roller, byv the power derived from the depression of the key, andlatching means released by the depressiomof the key and operable to interlock with the 'key-set-up mechanism and maintain a driving pressure for the endant independently of the key, said late 'n means having an arm engageable by the row of the reciprocating pendant to break-the interlock of the latch with the key-set-u mechanism to release the pendant from its iction-inducing ressure.

13. In a machine of "the c ass described,

the combination with a/constantly rotating roller, a typing device, alever for driving sai typingndevioe a key disconnected from said t 'ving lever, a pendant-mounted on said type-bar-drivmg lever and engageable izo with the rotating roller, and a pendant-controlling lever having'means engageable with said pendant to swing the pendant into engagement with the rotating roller to be recip= rocated thereby and drive the typing device, of intermediate mechanism connected to the key, and conneetible with the pendant-controlling lever to set up a type-device driving plessure between the pendant and the rotating roller, by the power derived from the depression of the key, and latching means released by the depression of the key and operable to interlock with the key-set-up mechanism and maintain adriving pressure for the pendant independently of the key, said latching means having an arm engageable by the throw of the reciprocating pendant to break the interlock of the latch with the key-set-up mechanism to release the pendant from its friction-inducing pressure, said latching means also having an arm operable torelease the depressed key when said interlock with the key-set-up mechanism is broken.

14. In a machine of the class described, the combination with a constantly rotating roller, a typing device, a lever for driving said typing device, a key disconnected from said typedriving lever, a pendant mounted on said type-bar-driving lever andengageable with the rotating roller, and a pendant-controlling lever having means engageable with said pendant to swing the pendant into engagement with the rotating roller to be reciprocated thereby and drive the typing, device, of intermediate mechanism connected to the key, and conneetible with the pendant-controlling lever to set up a type-device driving pressure 1 between the pendant and the rotating roller,

by the power derived from the depression of the key, means operable by the depression of the key to maintain the key-set-up driving pressure independently of the key, and a cam carried by the pendant and operable during the reciprocation thereof by the roller, to cam the pendant-controlling means for a greater friction-inducing spring pressure against the pendant after the pendant has been set in motion by the roller.

15. In a machine of the class described, the combination with a constantly rotating roller, a typing device, a lever for driving said typing device, a key disconnected from said typedriving lever, a pendant mounted on said type-bar-driving lever and engageable with the rotating roller, and a pendant-controlling lever having means engageable with said pendant to swing the pendant into engagement with the rotating roller to be reciprocated thereby and drive the typing device, of intermediate mechanism connected to the key, and conneetible with the pendant-controlling lever to set up a type-device driving pressure between the pendant and the rotating roller, by the power derived from the depression of the key, and means operable by the depression of the key to maintain the key-set-up driving pressure independently of the key, the driving pressure maintaining means including a latch-lever automatically interlockable with said intermediate mechanism during the reciprocation of the pendant.

16. In a machine of the classdescribed, the combination with a constantly rotating roller, a typing device, a lever for driving said typing device, a key disconnected from said typedriving lever, a pendant mounted on said type-bar-driving lever and engageable with the rotating roller, and a pendant-controlling lever having means engageable With said pendant to swing the pendant into engagement with the rotating roller to be reciprocated thereby and drive the typing device, of intermediate mechanism connected to the key, and conneetible with the pendant-controlling lever to setup a type-device driving pressure between the pendant and the rotating roller,

by the power derived from the depression of the key, and means operable by the depression of the key to maintain the key-set-up driving pressure independently of the key, the dr1ving pressure maintaining means includlng a latch-lever automatically interlockable wlth said intermediate mechanism during the reciprocat-ion of the pendant, said latchlng lever having means engageable by the reclprocatmg pendant to release the driving pressure maintaining means at the end of the reciprocation of the pendant to release the type-device to type by its momentum.

17 In a machine of the character described, the combination of a rotating power-roller, interponents pivotally connected to mainlevers and engageable with the power-roller, the interponents connected to associated typing and computing mechanisms, said members supported on the main frame, inner frames having slots, screws through the slots to attach the inner frames to the main frame, the inner frames cross-connected and su porting an apron, keys, rockers, lnterme ates, latch-members, and pressure-members rotatably supported by the cross connections, and adjustable thereon through set-collars and spacers, the keys linked to the rockers and the rockers carrying pawls to engage and rock the intermediates, the latter spring-linked 'to the pressure-members, the latch-members spring-connected to the intermediates to engage and hold the'latter through springtension when rocked, the rota-t 1e members adjustable with each other and forming a unit which, through said slots, is adjustable with the main frame, whereby the pressure-members may be located to engage and actuate the interponents when the keys'are depressed, to establish proper frictional engagement with the power-roller, to actuate the typing and computing mechanisms.

18. In a machine of the class described, the combination with a constantly rotating roller,

a typing device, a lever for driving said typing device, a key disconnected from said 'typethe rotating roller, and a pendant-controlling lever having means engageable with said pendant to swing the pendant into engagement with the rotating roller to be reciprocated thereby and drive the typing device, of mechanism to enable thekey to operate the pendant-controlling lever and force the pendant into a frictional en agement with the roller by the depression 0 the key, said mechanism including a rocker connected to the key, a pawl on the rocker to be driven thereby, a lever intermediate'the pawl and the pendantcontrolling lever to be-rocked by the driven pawl, a tensioned spring connecting the intermediate lever with the pendant-controlling lever without tension, and a-lever for latching the intermediate lever at a normal position where the pendant-controlling lever is without tension against the pendant.

. 19. In a machine of the class describedfihe combination with a constantly rotating roller, a typing device, a lever for driving'said typing device, a key disconnected from said type-driving lever, a pendant mounted on said type-bar-driving lever and en ageable With the rotating roller, and a pen ant-controlling lever having means engageable with said pendant to swing the pendant into engagement with the rotating roller to be reciprocated thereby, and drive the typing device, of-mechanism to enable the key to opcrate the pendant-controlling lever and force the pendant into a frictional engagement with the roller by the depression of the key, said mechanism including a rocker connected to the key, a pawl on the rocker to be driven thereby, a lever intermediate the pawl and the pendant-controlling lever to be rocked by the driven pawl, a tensioned spring connecting the intermediate lever with the pendant-controlling lever without tension, a stop, a lever for latching the intermediate lever at a normal position against said stop, and a spring connecting the latching lever and the intermediate lever to maintain a tensioned abutment between said levers, the tensioned abutment being broken by the pawl drivin against the intermediate lever to vibrate t e pendant controlling lever to control the pendant-pressure.

20. In a machine of the class described, the combination with a constantly rotating roller, a typin device, a lever for driving said typing evice, a key disconnected from said type-driving lever, a endant mounted on said type-bar-driving ever and engageable with the rotating roller, and a pendant-controlling lever having means engageable with said pendant to swing the pendant into en gagement with-the rotating roller. to be reciprocated thereby and drive the typing device, of mechanism to enable the key to operate the pendantcontrolling lever and force the pendant into a frictional engagement with the roller by the depression of the key, said mechanism including a rocker connected to the key, a pawl on the rocker to be driven thereby, a lever intermediate the pawl and the pendant-controlling lever to be rocked by the drivenpawl, a tensioned spring connecting the intermediate lever with thependant-controlling lever without tension, a stop, a lever for'latching the intermediate lever at a normal position against said stop, and a spring connecting the latching lever and the intermediate lever to maintain a tensioned abutment, between said levers, the tensioned abutment being broken by the pawl driving against the intermediate lever to vibrate the pendant-controlling lever to control the pendant-pressure, thevlatching lever having means to interlock with the pawl-driven intermediate lever to maintain the key-set pressure against the pendant during the reci riocation of the pendant.

said typin said type-driving lever, a pendant mounted on said type-bar-drivinglever and engageable with the rotating roller, and a pendantcontrolling lever havin means engageable with said pendant to swm the pendant into engagement with the'rotatmg roller to be reciprocated thereby and drive the typing device, of mechanism to enable the key to operate the pendant-controlling lever and force the pendant into a frictional en agement with the roller by the depression 0 the key, said. mechanism including a rocker connected to the key, a pawl on the rocker to be driven thereby, a lever intermediate the pawl and the pendant-controlling lever to be rocked by the driven pawl, a tensioned spring connecting the intermediate lever with the pendantcontrolling lever without tension, a stop, a lever for latching the intermediate lever at a normal position against said stop, and a In a machine of the class described, the

combination with a. constantly rotating roller, a typing device, a lever for driving device, a key disconnected from pendant-controlling lever to control the pendant-pressure, the latching lever having means to interlock with the pawl driven intermediate lever to maintain the key-set pres sure against the pendant during the reciprocation of the pendant, the latching lever also having meansengageable by-the pendant at the end of its reciprocation to break the interlock thereof and release the intermediate lever to remove. the pressure from the pendant and release the pendant from the control of the'rotating roller.

22. In a machine of the class described, the combination with a constantly rotating roller, a typing device, a lever for driving said typin device, a key disconnected from said typeriving lever, a pendant mounted on said type-bar-driving-lever and engageable with the rotating roller, and a pendantcontrolling lever having means engageable with said pendant to swing the pendant into engagement with the rotating roller to be reciprocated thereby and drive the typing device, of mechanism to enable the key to operate the pendant-controlling lever and force the pendant into a frictional engagement with the roller by the depression of the key, said mechanism including a rocker connected to the key, a pawl on the rocker to be driven thereby, a lever intermediate the pawl and the pendant-controlling lever to be rockeclby the driven pawl, a tensioned spring connecting. the intermediate lever with the pendant-controlling lever without tension, a

stop, a' lever for latching the intermediate lever at a normal position against said stop, and a spring connecting the latching lever and the intermediate lever to maintain a tensioned abutment between said levers, the tensioned abutment being broken by the pawl driving against the intermediate lever to vibrate the pendant-controlling lever to control the pendant-pressure, the latching lever having means to interlock with the pawldriven intermediate lever to maintain the key-set pressure against the pendant during the reciprocation of the pendant, the latching lever also having means engageable by the pendant at theend of its reciprocation to break the interlock thereof and release the lntermediate lever to remove the pressure from the pendant and release the pendant from the control of the rotating roller, the latching lever having other means to disengage the pawl from the intermediate lever to release the depressed key at approximately the same time said latching lever releases the intermediate lever. A

' RICHARD VON REPPERT.

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