US1156061A

US1156061A - Electric type-writer.

Info

Publication number: US1156061A
Application number: US737225A
Authority: US
Inventors: Mansfield C Crawley
Original assignee: ADDOGRAPH CO
Current assignee: ADDOGRAPH Co
Priority date: 1911-10-28
Filing date: 1912-12-17
Publication date: 1915-10-12
Anticipated expiration: 1932-10-12

Description

Patented '001. 12, 1915.

2 SHEETS-SHEET i.

TSMIN M. C. CRAWLtY.

ELECTRIC TYPE WRITER.

APPucATloN FILED nsc.11. 1912.

WITNESSES:

, M. C. lCTTAWLETI ELEcTmc TYPE WRITER.

APPLICATION EILED DEC.I1. 1.912.

.0. 1 102. R T o 21u Tv 11H NA .Q v .TU cs 0H m E uw wz m Du. 1 6 O, 6 .s 1 N a 1 l W Mansfield ,yyrawleg UNITED sTATEs PATENT oEEIoE. g

MANsEIELD c. CEAWLEY, or LosANeELEs, CAIIr'oENIAAssIGNoR To ADDOGEAPH COMPANY, 'or Los ANGELES, CALIEoENIAfA CCEPCEATICN vor CALIFORNIA.

Specication of Letters Patent.

Original application led October 28, 1 911, Seriall'No. 657,311. vDivided and this application'led December 17,1912.- SelialrNQ.737,225. i

To all wLom it may concern: l

geles and I tate of California, have invented new andI usefull Improvements fin Electric Type-Writers, of which the 'followingis a specification. l l

This invention relates t0 electric typewriting machines and pertains particularly tomachines whichv are convertible for separate use either as a typewriter or 'as acomp'uter, and in which machine both the typewriting and computing functions may be, performedA at the same time; the present appllcation being a division of my originalapplication Serial N o. 657,311, led October28th, 1911,

has to do especially with the typewriting features. p

l"Ihe invention consists of the parts, and the combination and construction yof ,parts as will be hereinafter more fully described and claimed, having reference to the panying drawings, in which- Figure l is a longitudinal Section of the invention, partly in elevation. Fig. 2 is -a detail of the type and digit-bar operating mechanism. Fig. 3 is a detail in perspective 4 of the end portion of the type bar actuating arm. Fig. 4 is a detail in plan of the operative mechanism for returning the type bar actuator `to normal position. Fig. 5 is a front elevation of the machinev with parts broken away.

In the'drawings, A represents a key lever of the typewriting mechanism, which is provvided lwith the usual depressing button A',

and is fulcrumed at 2.

The inner end of the key lever A is pivotally connected toa vertically disposed operating arm 3, the upper end of which is guided on, and adapted to pass through, a' slotformed in a stationary segment 4, mounted on the frame 5 of the machine. A spring 6 mounted' on the operating arm 3,

lnormallv retains the latter in its lowermost position.

There are as many keylevers A and operating'arms 3 provided, as ]ust described,

as there are keys or buttons A on the typewriting portion of the machine. Disposed above the upper end of the operating arm 3, above the segment 4, is a type. bar actuating-ann 7, the lower end of accorni f which extends downward at 8 and. is nor- Be it known that I, MANSFIELD C. GRAW-1 LEY, -a citizen of the United States, 4residing` at Los An eles, in the county of Los Anprovided with a hooked portion4 12 which is ,adapted to be engaged by a reciprocating segmental actuating bar 13, when the lower end 8 of the arm 7 is moved upward by op f erating the arm 3,' as later described and as shown in Fig. 2.

of links 14 fromoutwardly extending brack- The'actuating bar 1-3 -is carried by means 'ets 15 mounted on a rigid `portion ofthe frame* 5. A stiff Aspring 16 normally bears against the'ba'ck of one yor more of the links 14l adjacent thebrackets 15 and tends to move and retain the actuating barI 13 in its forwardmost position, as indicated in dotted lines in Fig. 2. Y

Means are` provided for normally retaining the actuating bar 13 in its rearward position in opposition to the tension of the` l spring 416,- whieh means is adapted'to be operated by the depression of a key A to release the actuating bar 13 and permits its ybeing carried forward lby the spring 16.

Patented oct.' 12, 1915.

The above-mentioned means are constructed as follows: Pivotally mounted on a bracket 17 on the actuating bar 13 is a link 18, which extends rearward of the bar 13 and connects with a 'crank 19 loosely mounted on a shaft 20. 'The outer end of the crank 19 carries a pawlf21whichis adapted to be engaged with, and disengaged from, a ratchet 22 rigidly mounted on the shaft 20. VThe pawl 21 is held out of Contact with the-ratchet 22 when-the bar 13 is in its rearwardmost position` Vby means of a stationary cam 23 mounted on a hanger on vthe frame 5', on which cam the outer end of the-pawl 21 is designed to ride, as later described. AWhen the pawl 21 is disengaged '.fromthe-ratchet 22,' the crank 19 is free to move or be held stationary, `independent of the revoluble shaft 20 on 'which it is mounted and which shaft is adapted to be, constantly rotated through gears '24 and 25, by means of a motor 26.

It wil1|be seen that, -by obstructing'the crank 19 at a point corresponding to the position. it will assume when the actuating barl 13, carrying the link 18, is in its rearwardmost position, the actuating bar 13 will be prevented from being moved forward, and that by relieving the crank 19 at this point the spring 16 will carry the bar 13 forward with considerable velocity. j

The mechanism for locking the crank 19 consists of a depending pawl or dog 27 pivoted at its lupper end to the frame 5, the crank engaging member 27 of which is nor- Vmally disposed in the path of travel of the outer end of the crank 19 in such manner as to prevent further movement'of the latter when it reaches this point, as later described. The dog 27 is normally retained in its crank engaging position, by means of a spring actuated bell-crank lever 28, which is pivoted vat 29 to a fixed member on the frame 5,

and has a projection 28 on its lower end which bears against'the back of an extended portion of the dog 27. A spring 30, is wound around astud on the lever 28 and bears between a rigid pin and the lever 28 in such manner as to exert an inward pressure on the lower end of the lever 28.

The device for releasing the dog 27 from engagement with the crank 19, comprises a link 31, one end of which is provided with a slot into which a pin 32 on the dog 27 extends, and the other end of which engages a curved releasing bar 33 which is located f between the segment 4 and the actuator bar arm 3'v upward through the guide slot 1n the stationary segment 4. This brings the upper end lof the operating arm 3v into contact with the downwardly inclined end 8 of the arm v7, thus moving the latter upward on its pivotal mounting so as to dispose the hook12. in front of the actuating-bar 13, as shown in Fig. 2.A As the inclined portion 8 of the arm 7 movesupward, the bar 33 is moved backward by reason of the in.-

lclined portion 8 bearing` against the bar at a point 45 from its center, thus acting as a wedge to move the bar y33 backward on its pivotal mountings'34. The rearward movement of the bar 33 carries the slotted link 31 rearward therewith, so asrto throw the projection 27r on the lower end of the dog 27l voutof engagement-'with'the crank 195, which vpermits the latter toA rotate on the shaft 20 and thus release' :the bar' 13. y The bar 13 is then caused to move forward by means of the tension of the springs lbearing against the links 14, the links 18 pulling upon the loose crank 19 .to carry the` pawl 21 over the vcam surface 23, the cam 23 per-A mitting the pawl 21 to traved free from engagement with the ratchet 22 while the bar 13 is moving in a forward direction. rlhe springs 16 act on the link 14 to impel the actuating bar 13 forwardwith considerable velocity, the forward movement of the bar -13 acting to impel the type bar 10 upward against the platen roll 35 through the arm 7 which has been previously disposed in front of the movable bar 13, as before described. A uniform impact of all the typev in the machine on the platen roll is insured for the reason that one spring or set of springs 16 control the forward movement of the actuator-bar 13, which bar operates on all the type bars. The moment the impression is made by the typerbar 10, the spring 9j returns it and the arm 7 to the normal position shown in Fig. 1. In the meantime, the pawl 21 has been carried clear of the cam 23 by means of the link 18 and crank 19,`which are carried forwardr by the actuating bar 13.

The moment the pawl 21 is released from the cam 23 a spring l21, on the pawl .throws it into engagement with the rotating ratchet wheel 22 on the shaft 20, so that as (the,

ratchet revolves the crank 19 will be carried therewith, thus pulling upon the link 18 to return the bar 13 back'to its normal position, in opposition to the -spring l16 where it is retained by the dog 27, reengag-v ing the crank 19. The moment the crank 19 is engaged by the dog 27, the heel of the pawl 21 strikesthe cam 23 which action rocks the pawl 21 and releases it from engagement with the ratchet 22, in whichv released position itis retained by the cam 23` iasl until the crank 19 is again releasedfrom the dog 27 and isfagain moved forward by the springs 16, as before described. The moment the bar 13 starts-'back to its rearward position it releases the hook'12 on the arm 7, thereby allowing the spring 9 to pull ythe arm 7 downward until the lower end of the' inclined portion 8 comes yin contact with lthe slotted segment 4, the lower end 8 of the arm 7 moving rearward into contact with the edge of the actuating.' arm 3 ex-` tending through the segment 4, so as to move the latter rearward against the tension of the spring 6, as shown in dotted lines in Fig. 2, thespring 9 at the same time restoring the type'bar 10 to normal. j As this occurs, the spring 6 returns the arm 3 and keylever A to normal, the upper end of the arm 3 `passing' beneath the -lower end of the wedge-end 8 in position for another operation, and the releasing bar 33 assuming its former position over the inclined portion 8 of the arm 7.

'to retract the bar, and means forV retainingv the bar in its rearmost positlon in opposiopposition w the spring members.

The platen roll 35 is'mounted on `a carriage 36, which is adapted to travel back and forth on a trackway 37, as is common in typewriter construction.,l As vthe operation` of the platen roller 35 and the' carriage. 36 forms .no part of the present invention, the mechanism here shown.

Having thus described my inventionwhat I claim and desire'tosecure by Letters Patent is.-

l. The combination with aseries of .type l bars and a bank of key levers, of a reciprocating bar for actuating the type bars, spring means for advancing the b ar, a rotary motor, and means operable by said motor to retract the bar.

2. The combination, with a series of type bars and a bank of key levers, of a reciprocating bar for actuating the type bars,

spring means for advancing'the bar, a ro-v tary motor, means operable by said m'otor tion to the spring advancing means. l

3. The combination with a series of type bars and a bank of key levers, of a reciprocating bar for actuating the type bars, spring means forv advancing the bar,l a rotary ino-- tor, means operable by said motor to retract the bar, means for retaining the bar in its rearmost position in opposition tothe spring advancing means, means operable by a key` lever for connecting a typebar to the re ciprocating bar, and means actuated by said connecting means to release the bar.

4. The combination with a series lof type bars and a bank of key levers, of an arm pivoted o n each of the type bars, said arm having an. inclined portion and a hooked portion on its outer end, a reciprocating actuating bar, springr members for advancing the actuating bar, and means operated by a key lever for disposing the hooked portion of said arm in the path of travel of the Y actuating bar.

5. The combination with a series of type bars and a bank of key levers, of an' arm pivoted on each of the type bars, said arm having .an inclined portion and` a hooked portion on its outer end, a reciprocating actuating bar,spring members for advanc-` ing the actuating bar, a rotary motor, means operable by saidvmotor to-retract the actu` ating bar, and means for normally holding the actuating bar 'in its retracted position in 6. The combination with a series of type bars and a bank of key levers, of'an Aarm-- pivoted on each of the type levers, said arm having an inclined portion and a `hooked portion on its outerY end, a reciprocating- 'actuatingban spring members `for advancing the actuating bar, arotaryrmotor, means operable by said motor to retract the. actu.-vv

for operating the same isnot ating bar, means vfor normally holdingithe actuating bar in its retracted position in opposition to the springl members, and means by which. the operation of a key lever will dispose the hooked portion- 0f the arm in front 'of the actuating bar.

7. The combination with a series of type Vbars'and a bank of key bars, of an -arm pivoted on. each of the type levers, said arm having an inclined portion anda hooked portion on its outer end, a reciprocating actuating bar, spring members for advancing the actuating bar, a rotaryv motor, means `operable v by said motor to retract the actuating bar, means for normally holding the actuating bar in its retracted positionv in opposition to .the spring members, means'by which the operation of a key lever will dispose the hooked portion ofthe arm in front of the actuating bar, and a means operable by said last-named means for releasing the actuating bar to allowv it to be moved forward by the spring members.

8. Ina type'writing machine, the combiv.nation with a series of type barsand a bank 0f key levers, of ay motor, a shaft'driven continuously by. saidl motor, a' crank loose on said shaft, an actuating bar, means for operating the type bars by the actuating bar-on wa-rdly, spring 4.members for moving the actuating bar foi-' wa'rdly,- and means `by which the `forward movement of the actuating bar will-operate 'a type bar, said means comprising an arm on 'the type bar having a hooked portion engageable with the actuating bar.

10.` The combination with a series of type bars and a bank of 'key levers, Aof a motor, a shaft driven continuously by said motor, a crank loose on said shaft, an actuating bar, a

rod connecting said crankto saidactuating bar, means for engaging-the crank to the shaft'to move the actuating bar' rearwardly, means by whichl the forward movement of the actuating bar will operate' a typebar,

saidfmeans comprising an armon the type bar .having a hooked portion'engageable with p the actuating bar, and means forlv normallyretaining theactuating bar in its rearward vposition in oppositionto the Spring members, 11.v The combination with a series of type barsand a bankfof'key levers, of a motor', a'

shaftdriven continuously by said motor, a crank loose on said shaft, an actuating bar, a rod connecting said crank to said actuating bar, means for engaging the crank to the shaft to move the actuating bar rearwardly, spring membersfor moving the actuating bar forwardly, means by which the forward movement of the actuating bar will operate a type bar, said means comprising an arm on the type bar having a hooked portion engageablewith the actuating bar, and means .for normally retaining the actuating bar in its rearward position in opposition to the spring members, said means including a dog engageable with said crank to limit its movement.

12. The combination with a series of type bars and a bank of key levers, of a motor, a shaft driven'continuously by said motor, a crank loose on said shaft, an actuating bar, a rodconnecting said crank to said actuating bar, means for engaging the crank to the shaft to move the actuating bar rearwardly, spring members for moving the actuating bar forwardly, means by which the forward movement of the actuating bar will operate a type bar, said means comprising an arm on the type bar having ahooked portion engageable with the actuating bar, means operable by 'a key lever lfor throwing said hooked Aportion of the arm into engagement with the actuating bar, means for normally retaining the actuating bar in its rearward position in opposition to the spring members, said means including a dog engageable with said crank to limit its movement, and means'operable by the key lever for disenygagin the dog from the crank.

13. h e combination with a series of type bars and a bank of key levers, of a motor, a

`shaft driven continuously by said motor, a

crank loose onv said shaft, an actuating bar, a rod connecting said crank to said actuating bar, means for engaging the crank to the shaft to move the actuating bar rearwardly,V including a ratchet on the shaft and a pawl on the crank engageable therewith', spring members formoving the actuating bar forwardly,vmeans by which the forward movement of the actuating bar will operate a type bar', said meanscomprising an arm on the typebar having a hooked portion engageable with the actuating bar, means for normally retaining the actuating bar in its rearward position in opposition to the spring members, said means. including a dog engageable4 with said crank to limit its movement, and means operable by the key lever for disengaging the dog from the crank.

14. In a typewriting machinehaving a series of type bars, a series of key levers corresponding to the type bars, an actuating bar foroperatingjthe type bars, a rotary motor, meansincluding a clutch mechanism operable by the movementof the actuating bar, by which the motor will move the actuating bar in one direction, spring means ,for moving the actuating bar in the other direction, and means operated from a key lever for controlling the operation of said spring means.

15. The combination of a key lever, a vertically movable operating arm pivoted thereto, stationary segment, a slot in the segment in which the operating arm is guided, yieldable means for normally retaining the upper end of the operating arm below the upper surface of the segment, a pivoted type bar, an actuating arm pivoted thereon, the outer end of said actuating arm positioned to be raised by the vertical movement of the operating arm, and spring operated means engageable with the actuating arm whereby the type bar will be rocked on its pivot.

16. The combination of a key lever, a vertically movable operating arm pivoted thereto, a stationary segment, a slot in the segment in which the operating arm is guided,

yieldable means for normally retaining the upper end of the operating arm below the upper surface of the segment, a pivoted type bar, an actuating arm `pivoted thereon, the outer end of said `actuating* arm positioned to be raised by the vertical movement of the operating arm, vand spring operated means engageable with the actuatingarm whereby the type bar will be rocked on its pivot, said spring operated means normally retained in a retracted position under tension and adapted to be released by the upward movement of the operating. arm.

17. The combination of a key-lever, a vertically movable 'operating arm pivoted thereto, a stationary segment, a slot in the segment in which the operating arm is guided, yieldable means forl normally'retaining the upper end ofthe operating arm below the upper surface of the segment,- a pivoted type bar, an actuating arm pivoted thereon, the outer end of said actuating arm positioned to be raised by the vertical movement of the operating arm, a spring propelled actuator bar positioned to engage with the actuating arm when the latter is in its raised position, said actuator bar normally retracted under tension, and means operable through the upward movement of the operating arm for releasing the actuator bar to permit it to move forward and act on the actuating arm and thereby rock the type bar on its pivot.

18. The combination of a key lever, a vertically movable operating arm pivoted thereto, a stationary segment, a slot in the segment in which the operating arm is guided, yieldable means for normally retaining the upper end of the operating arm below the upper surface of the segment, a pivoted type bar, an actuating arm pivoted thereon, the outer end of said` actuating'arm positioned to be raised bythe vertical movement of the operating arm, a spring propelled actuator bar positioned to engage with the actuating arm when the latter-is in its raised position, links on which said actuator bar is sus- Eended, a spring for advancing the actuator ar operative on said links, and means for normally retaining the actuator bar in a retracted ositon in opposition to the spring. 19. Tiie combination of a key lever, a vertically movable operating arm pivoted thereto, a stationary segment, a slot in the segment in which the operating arm is guided,

yieldable means for normally retaining the yieldable means for normally retaining the upper` end of the operating arm below the upper surface of the segment, a pivoted type bar, an actuating arm pivoted thereon, the outer end of said actuating arm positioned to be raised by the vertical movement of the operating arm, a spring propelled actuator bar positioned to engage with the actuating arm when the latter is inits raised position, links on which said actuator bar is suspended, a spring for advancing the actuator bar operative on said links, means for normally retaining the actuator bar in a retracted position in opposition to the spring, and means operated by the upward movement of the actuating arm for releasing the actuator bar to permit it to move forward and act on the actuating arm and thereby rock the type bar on its pivot.

20. The combination of a key lever, a vertically movable operating arm pivoted thereto, a stationary segment, a slot in the segment in which the operating arm is guided,

upper end of the operating arm below the upper surface of the segment, a pivoted type 4` bar, an actuating arm pivoted thereon, the

outer end of said actuating arm positioned to be raised by the vertical movement of the operating arm, a spring propelled actuator bar positioned to engage with the actuating armwhen the latter is in its raised position, links on which said actuator bar is suspended, a spring for advancing'the actuator bar operative on said links, means for normally retaining the actuatorbar in a retracted position in opposition to the spring, comprising-a link connected at one end to the actuator bar, a loose crank to which the other end of the link is pivoted, and means for temporarily blocking the crank against movement. 4

21. The combination of a key lever, a vertically movable operating arm pivoted thereto, astationary segment, a s'lot inv thesegment in which the operating arm v1 s guided, yieldable means for normal y retamlng the upper'end of .the operatmg arm below the upper surface of the segment, av plvoted type bar, an actuating arm pivotedthereon, the outer end of said actuating arm positioned to be raised by the vertical movement of the operating arm, a spring Ipropelled actuator bar positioned to engage with the actuating comprising a link connected at one end to the actuator bar, a loose crankto which the other end of the link is ivoted, means for temporarily blocking tllie crank against movement consisting of a dog, and means operated by the upward movement of the operatingar'm for disengaging the dog from the loosel crank to permit the actuator bar to advance. .p

22. The combination of a key lever, a vertically movable operating arm pivoted thereto, a stationary segment, a slot in the segment in which the operating arm is guided, yieldable means for normally retaining the upper end of the operating arm below the upper surface of the segment, a pivoted typey bar, an actuating arm pivoted thereon, the outer end of said actuating arm positioned to be raised by the vertical movement of the operating arm, a spring propelled actuator bar posltioned to engageV with the actuating arm when the latter is in its raised position, links on which'said actuator bar is suspended, a spring for advancing the actuator bar operative on said links means for normally retaining the actuator bar in a retracted position in opposition to the spring, comprising a'link connected at one endfto the actuator bar, a'loose crank to which the other end of the link is pivoted, means for temporarily blocking the` crank against movement consisting of a dog, means operated by the upward movement of the operating arm for disengagingl the dog from the loose crank to permit the actuator bar to advance, and motor driven means for retracting the actuator bar in opposition to the spring. l .23. The combination of a key lever, a vertically movable operating arm pivoted thereto, a stationary-segment, a slot in the segment in which the operating arm is ided, yieldable means for normally retaining the upper end of the operating arm below the upper surface of the segment, a pivoted type bar, an actuating arm pivoted thereon, lthe outer end of said actuating arm positioned to be. raised bythe vertical movement-of the operating arm, a spring propelled actuator bar positioned to engage with the actuating arm when the latter is in its raised position, links on ,which said 'actuator bar is suspended, a spring for advancing lthe actuator bar ,operative on said links,-means for normally retaining the actuator bar in a retracted position in opposition to the spring, comprising a link connected at one end to the actuator bar, a loose crank to which the other 13o end oflthe link is pivoted, means for temporarilyy blockingithe crank against movement consisting of a dog, means operatedby the upward'movement of the operating f arm for disengaging the dog from the loose crank to permit the actuator bar to advance, and motor driven means acting on the crank for retracting the actuator bar.

24. The combination of a key lever, a verl@ tically movable operating arm pivoted thereto, a stationary segment, a slot in the segment in which the operating arm is guided, yieldable means for normally retaining the upper end of the operating arm below the upper surface of the segment, a pivoted type bar, an actuating armpivoted thereon, the outer end of Asaid actuating arm positioned to be raised by the vertical move-v ment of the operating arm, a spring propelled actuator bar positioned to engage with the actuating arm when the latter is in its raised position, links on which said actuator bar is suspended, a spring for ad vancing the lactuator bar operative on said links, means for .normally retaining the actilator bar in a retracted position in opposition to the spring, comprising a link connected at one end to the actuator bar, a loose crank to which the other end of the link is pivoted, means for temporarily blocking the crank against movement consisting of a dog, means operated by the up-` ward movement of the operating arm for disengaging the dog from the loose crank to permit the actuator bar to advance, motor driven means acting on the crank for retracting the actuator bar, including a pawl mounted on the crank, a continuously revoluble shaft, and a ratchet on the shaft with 4o which the pawl is engageable.

25. The combination of a key lever, a vertically movable operating arm pivoted thereto, a stationary segment, a slot in the segment in which the operating arm is guided,

yieldable means for normally retaining the upper end of the operating arm below the upper surface of the segment, a pivoted type bar, an 'actuating arm pivoted thereon, the outer end of the said actuating arm posi- 5e tioned to be raised by the vertical movement of the operating arm, a spring propelled' actuator bar positioned to engage with the actuating arm when the latter is in its raised position, links on which said actuator bar is suspended, a spring for advancing the actuator bar operative on said links, means for normally retaining the actuator bar in a retracted position in opposition to the spring, comprising a link connected at one end to e0 the actuator bar, a loose crank to which the other end of the link is pivoted, means for temporarily blocking the crank against movement, consisting of a dog, means operated by the upward movement of the operat- Ge ing arm for disengaging the` dog from the loose crank to permit the actuator bar to advance' motor driven means acting on the crank for retracting the actuator bar, including a pawl mounted on the crank, a continuously revoluble shaft, a ratchet on the '70 shaft with which the pawl is'engageable, and means whereby the pawl is held out of engagement with the ratchet on the forward movement ofthe actuator bar arranged to permit the pawl toengage the ratchet on theend of the forward stroke of the actuator bar to cause the crank to rotate with the ratchet to retract the actuator bar.

26. The combination of a key lever, a vertically movable operating arm pivoted thereto, a stationary segment, a slot in the segment in which the operating arm is guided, yieldable means for normally retaining-the upper end of the operating arm below the upper surface of the segment, a 85 pivoted type bar, an actua-ting arm pivoted thereon, the outer end of the said actuating arm positioned to be raised by the vertical movement of the operating arm, a spring propelled actuator bar positioned to engage with the actuating arm when the latter is in .Y its raised position,links on which said actuator bar is suspended, a spring for -advancing the actuator bar operative on `said links, means forlnormally retaining the actuator bar in a` retracted position in opposition to the spring, comprising a link connected. at one end to the actuator bar, a loose crank to .'whichthe otherl end of the link is pivoted,

means for temporarily blocking the crank against movement, ,consisting of a dog,

means operated by the upward movementl of .the operating arm for disengaging the dog from the loose crank to permit the actuator bar to advance, motor driven means acting on the crank for retracting the actuator bar, including a pawl mounted on the crank, a continuously revoluble shaft, a ratchet on the shaft with which the pawl is engageable, means whereby the pawl is held out of engagement with the ratchet on the forward movement of the actuator bar arranged to permit the pawl to engage the ratchet on thel end ofl the forward stroke of the actuator` bar to causethe crank to rotate with the ratchet to retract the actuator bar, means for causing the dog to rengage the crank on the end of the back stroke of the actuator bar, and means for disengaging the pawl from the ratchet just before the rengage ment of the crank.

27. The combination of a key lever, a vertically movable operating arm pivoted thereto, a stationarysegment, a slot in the segment in which 'the operating arm is 125 guided, yieldable means for normally.. retaining the upper end ofthe operating arm below the upper'surface of the segment, a pivoted ltype bar, an actuating army pivoted thereon, the outer end of the said actuating arm' positioned to be raised by the Vertical movement of the operatingarm, ay spring propelled actuator bar positioned to engage With the actuating arm when the latter is in its raised position, links on which said actuator bar is suspended, a spring for advancing the actuator bar operative on said links, means for normally retaining the actuator bar. in a retracted position in opposition to the sprin comprising a. link connected at one en to the actuator bar, a loose crank to which the other end of the link ispivoted, means for temporarily blocking the crank against movement consisting of a dog, means operated by the upward movement of the operating arm for disengaging the dog from the loose crank to permit the actuator bar to advance, motor driven means acting on the crank for retracting the actuator bar, including a pawl mounted on the crank, a continuously revoluble shaft, a ratchet on the shaft with which the pawl is engageable, means Whereby the pawl is held out of engagement with the ratchet on the .forward movement of the actuator bar arranged to permit the paWl to engage the ratchet on the vend ofthe forward stroke of the actuator bar to cause the crank to rotate With the ratchet to retract the actuator bar, means for causing the dog to reengage the vcrank on the end of. the back stroke of the actuator bar, means for dise gagin the pawlfrom the ratchet just before t e rengagement of the crank, and a motor for rotating said shaft continuously.

.28.. In a typewriting machine, the combination of a series of type bars, an automatically operating universal bar for severally actuating said bars, spring means for advancing the actuator, a selective means for the type bars, rotary motive means .to retract said actuator and means for controlling the operation of the universal bar.

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

MANSFIELD C. CRAWLEY. Witnesses:

A10. FORBES, H. M. BUCHANAN.