US1060004A - Carriage-backsetting mechanism for type-writers. - Google Patents

Description

o. Q.. KAVLE. Y CARRAGE' BAGKSETTING MEGHANISM FOR ATYPE WRITERS.

vPatented Api.. 29, 1913.

PPLLQAIIOH FILED 00127, 1909,

2 SHEETS-SHEET l.

0. 0. KAVLB. CARRAGE BACKSBTTING MBGHANISM FOR TYPE WRITERS.

APPLIOATION FILED 00T.7, 1909.

Patented Apr. 29, 1913.

' 2 SHEETS-SHEET 2.

citizen. of the United 'L N Al TED STATES PATENT OFFICE. oscAR c. KAvLE, or slrnncusn, NEW Yorin, Assignee 'ro HARVEY A. Moyne, or

. sYRAcUsE, NEW YORK.

CARRIAGE-BACKSETTIN G MECHA'NISM FOR TYPE-WRITERS.

Specification of Letters Patent.

Patented Apr. 29, 191.3.

Application tiled October 7, 1909. Serial No. 521,522.

To all whom t may con/'cm Be it known that l, OSCAR C. Knvnn, a- Stutes, residing at Syracuse, in the countv of Onondaga and State .of New York, have invented a new and useful Improvement in Carriage-Backsetting Mechanisms for l`ype-Vffriters, of

i which the following is a specification.

This invention relates to typewriters and analogous machines provided with a carlria e which has n step by step movement, am? more particularly to improvements in means' for moving or setting the carriage back one or more steps or letter spaces.

In the back setting 'devices heretofore used of which I am aware, itis necessary to exercise care in depressing the actuating prevent the carriage space, that is, a -quick actuation of the key will givethe carriage momentum enough to casuse it to move two or even more than two spaces. VAttempts'have been made to overcome this defect by provid-ing means intended to loek'the carriage or esupement wheel so that it can not be moved more than 'one space by .each depression of the actuating key,1but. these devicesare effective .only whenthe key is fully depressed; and

even with such devices itis possible, by a quick partiel depression of the key, to give theV carriage n n impulse which will cause it to move more than the one space desired.

LThe primary object of this invention is to overcomev these objections 4and produce a mechanism for settingvback the carriage a step at La? time, which will'be positive and certain in action and will positively prevent the carriage from being set back adistance greater tho-n one of its forward step movements at each actuation of the back-setting key, Aregardless owhether the-key is actuated carefully or quickly and without especialcare. y

Other Iobjects of the invention are to prnduce a. carriage l back-setting mechanism which is of simple, inexpensive and durable construction, is easy to overste, and enables the cari-inge to lbe quickly set buck one or 'more steps'without danger of producing e greater-movement thereof than 1s intended; and also to improve vcorra e -bock-'setting mechanisms in the respects ereinafter described :mdnset forth inr the claims.

These results are attained byproviding a bncksctting'mechanism in which the manual force exerted 1n depressing lor actuating the back-setting finger key does not act directly l rear elevation, partly i-n section, of a, typewriting machine provided with n carriage back-setting mechanism embodying the invention, showing the normal position of the parts. Fig. 2, is 'a simil-ar view, showing lthe back-setting lever set in position for operai tion by its spring to set back the carriage. Fig. 3 is a lfragmentary vertical section in line 3-3, Fig. 4. Fig. 4 is a longitudinal sectional elevation substantially in line 4.-'4, Fig. 1. F ig. 5 is a. rontelevation, partly in section', ofthe bock-setting lever and associatedV parts.

Like reference characters refer -tolike parts in' the several gures.

A represents themain frameof u typewriting machine, B the peper platen, C the platen carriage, D the pivoted shift frame by which zthe carriage is 'shifted to place the platen in printing relation to different sets of type, E the poweroperated orA spring drum for causing the lateral travel of the carriage, F and f respectively the toothed wheel an cooperating holding dog of the ca rringe escapement, and G the pinion which is connected to the escapement wheel and meshes with a toothed rack g on the carri. re to govern the letter space' movements orf the carriage. The operation of these-parts is well known. They may be of any suitable construction, and -will differ" in different makes of typewriters.

H represents a ,pnwl lever or device which coperates withjsome suitable part (preferably theescapement Wheel) connected tothe carriage C for setting it back, that is, 'moving'it in a direction opposite -to its letter space omovements. This lever is connected to .s finger key or 'lever-by vhiohit is moved manually in one direction .to ace it in ,po` sition to engage and turn tie 4escepeinent wheel beckwardly, and it is .moved yin the fragmentary ment wheel F. The pawl has a tail. that ,i's-

normally held by 'a spring itz-against a stop ha on the lever, whereby the pawl is adapted tof yield in one direction only. As' the 'escapement wheel is mounted o n the shift` frame it swings slightly when the platen is shifted. The face of the pawl is therefore,

made 'wide enough to engage the wheel -in 'either of its' positions. The other end .of

. .it isfv etacha ly connecteduto'thekey lever.

the pawl lever is provided with ayhole'z' in wluch engages the rear end of an intermediate lever I-;which extends forwardly A bene'ath 'and isucentrally pivoted 'to the top platea and is connected at its front end b'y' -a link 1I.to.,anl operatin orkeyleven K.

f The linktv i preferably: as a -pin zand Thiskey lever, which "may be .connected .and mounted similarlygto the key-levers (not shown) :for operating the -type-bars,is preferably the maehme and provided at its front end with 'a finger key l', which is located in the upper'iorrear bank of-'keys in the keybard,

. L'r'epresents .a leaf springnwhicll's secured-by a s'crew l, or otherwise, to the unf' derside ofthe top plate and bears-at its free enda ainst a. lug-l on the' pawl lever .H;' 40' and represents a coilspringwhich'is attachedjla't" one endoto the linkl i and' at its otheriend to a. screw mlwhich is screwed into anut m s'eagted in .a countersunk' hole inthe top plat'e,and can be adjustedto' regulate Vthe tensioniof the, spring. Mxlby turning' the nut m;

Wh n 1t 1s desired to set back the carriage" thelnger key l7a -is depressed, which acts through the described connectionseto move the pawl 4lever H ffrom the normalposition shown 'in Fig. 1 to theposition'shown in FigxQ.V During this movement olf lever the"escapement wheel -is'held stationarybyfits dog f, and the pawl It yieldsv and rides over-two teeth of the escapementwheel and assumes the 4position shown' in Fig.v2,

infront of thesecond tooth, read-y to engage this tooth andf turn the wheel backwardly during the return movement ofthe lever. The springs L and' M are strained by the depression of the. linger key,V and vwhen the vlinger key is released these springs raise the finger key and return thepawl lever to their normal positions, and as the 55 pawl is then held rigid with -the lever by the located at the left-hand side 'of stop h5, it engages the tooth of the escapement wheel in rar of it and turns the wheel backwardly, z'. e., to the left in Figs. 1 and 2, a distance nearly equal to two tooth the' tooth, leaving the wheel free to move forwardly under the influence of the carriage driving spring, a distance less than one tooth space, or'until -arrested by the holding dog f. The lower end of the pawl lever vis adapted to strike the topplate a to limit its movement by the key lever, and its return is limited oy a lug thereon engaging the hub of the" spring drum E. After the parts have returned to their normal positions the escapement wheel will have been' forced 'back and will be held one tooth spacefrom where it was before the'key lever was depressed. The Wheel is thus moved backwardly more thanv'one 'tooth space in order'to give the holding dog; f an opportunity to move into holding relation to the tooth' next to the one previously engaged by it. jWhen'used jyvith amescapement of diiferent construction .the p awlmay .son of. the 'construction lof. the .esoapement,

to 'setthe wheel back one. tooth space.

` It willbe'underst'ood from the above that 'the carria and Mg'an that it: does not begin lts movenent until the key lever is released and per- `mitted to start back 'to its normal-position.

.The-carriage is-,set back'by the power of the springs and notbythemanual vforce the springs, andstrains. the springs, or `causes thern. to operate. Theosprin act alike 'an `Vall cases, and! it makes .no iierence whether thekey bedeprssed quickly or ;slowly,ior`v whether or notit. be released v'springs will .act quickly if permitted to do so,and they will act slowlyif the `operator dwellson the key', but in any `case they spaces, when it'passes out of contact'with be made to move' the wheel either a 'greaten or' a less distance as may be. requiredby. rea- Y set back by the .springs L. x

'applied to 'the Akey 4Aleverby'the operator which sets or places. .the pawl in osition 'for operation on the escapementfw eel by." l

Aproper .action of'the mechanism is Vthat the ey lever be depressed to. itelimitw The lwill setthe carriage 'back one, and only y ,on'e, letter space for each de ression of the :key lever. The'action lcan repeated as Vfast' as desired'ifit'be vdesired to settghef `carriage back'more than one letter s ace. TheV separate adjustable spring l\ isused to return the key.lever, as' it is useful in lsecuring the proper vaction of the back set- .ting pawl when Iirst'-v adjusting the parts, and at any future time when it may be necessary to reinforce the pawl-operatin Either the, spring L vor the spring M could -beused -alone and made adJustable if de sired, but it ispreferable to use the' two spring Llshould the latter become weakene o distance equal to one of'its' springsand make the lighter-one, M, ad` just'abl'e. 'One or more springs or a diie'rent sort of a motor or'p'owersdevicewhich o Perates as described-to Vset backthe carriage afterthekey lever'has been actuated, and which operates on the carriage through the escapementwheel or.other element, can

be used, 'and the invention is therefore not restricted to the described. construction of the back-setting mechanism.

I claim as my invention 1. The combination with a paper carriage liavinga' ,motor dri ven step-by-step forward movement, of mechanism for setting back. the carriage including a power device by the power of which the carriage is set back aforward step movements each time said mechanism is operated,f and a manually operable device for causing the operation 'of said power device, substantially as set forth.

2; The combination with aV paper carriage having a motor driven step-b -step forward movement, 'of mechanism for setting back the carriage includinga spring actuated d evice by the power of which the carriage is set back a distance equalto one .of-its forward step movements each time said devicev is actuated, and -means operable at will \to cause the actuating of'said spring'actated device', substantially as set forth,

l 3 The combination with a. paper carriage Y having 'a motor-driven step-by-step forward movement, of mechanism for settingback the carriage comprising a spring for moving the carriage, and. a key. forstraining said spring, substantially as 'set fortlnf 4., The combination with a papercarriage having a st ep-by-step forward movement,

"'iirst engagea tooth of sa1d Wheel .and par- 105' ofmechanism for setting backthe carriage.

comprising a4 device for moving thecan,A

riage, aspring for operating said device t6V move thecarriage backwardly, and a key tor placing said device in position for peration and .straining said spring, substantially as set forth.v

5. The'comhination with a paper carriage, and mechanism for mbving the carriage for` wardly step by step, of mechanism for set-V ting bachthe' carriage a step at a time, in-v cluding. a spring by the power of which the carri-age is set back, and means operable at will for straining said spring whenever its action is desired, substantially as setforth.

6. In a typewriting machine, the 'combination with a carriage having a step-by-stcp forward movement, of a spring and mecha.

nism actuated thereby for' setting back the carriage, a back-setting finger key4 located at the keyboard, and connections for strain-f ing said springwhcnsaidkey Ais actuated, said spring and mech anism' acting-'to set backthe carriage one step for each actuation of saidback-setting key, substantially as set forth.

` mechanism for 7. The combination witha paper carriage having Va stepby=step forward movement, of a'spring, a key for straining said spring, and means which are actuated b said spring. to set back the carriage upon t e' release of 70 said key, vsubstantially as setfrth;

8. The combination with a' paper carriage having a step-by-'step forward movement, of i setting back the carriage comprising a spring for moving the carriage, anl adjustable auxiliary spring whichassists said first spring, and means for straining both of said springs, substantially as set forth.

and mechanism for moving the carriage for# wardly step Vby step including a toothed wheel, of mechanism fortu'rning said toothed wheel backwardly to set-'backtle carriage, comprisinga awl lever, a pawl mounted 8g on saidlever -o swing in substantially the plane of the tobthed wheel and ,toyield and ride over the teethof said wheel "when, the pawl lever is manually moved in one direction and to engage and turn the toothed wheel ,when vthe pawl leveris released and is permitted.to move in the opposite direction, and `power means for swinging said pawl lever in said opposite direction, sub# stantially-as set-- forth. .1.95 110. The 'combinationfwith a papercarriage, and mechanism'formoving the carriage forwardly `step by step including.; al toothed 1wlieel,jof mechanism for turnin' and adapted when'mbved in onedirectionto tially rotate said wheel and then clear said tooth, means for oscillating said pawl levelfV and means for limiting themovements 'di said pawl lever, substantially'as set forth.'-

11. Tl1e.coinbination `within' paper e'arno riagehaving a st ep-by-step forward movement, of mechanism for setting back. the carriage comprising a toothed'wheel, a'pawl 'normally disengaged. from said toothed wheel,inanually-operable means for `posi- .-tioning said pawlto engage said toothed wheel, and a spring wli'ch is strained by said manually-operable means and acts to' move said pawl and tnrn'said toothed wheel a vstep -eachgtinie said mannally.- operable 120 means are actuated,` substantially as seL- forth.

12. Thecombinati0n with a p'apr cars riage, printing mechanism, and power# drivenmeans controlled by the printing ,mechanism for producingwi step by step forward movement of the carriage, of mech` anism` for setting back the carriage including a power-'actuated device the power of.which the carriage isset back, and a la 9. The-combination with a paper carriage, 80

" special finger lrey which acts when moved manually to store power in said poweractu ated. device and when released to permit the stored power to actuate said device, subst.mtiallfy 'as set forth.

13. The combination withV a paper carridge, printing mechanism, and powerdriven means 'controlled .bythe printing A Q .controlled means for setting. back t e carmechanism for producing a step by'step forward movement of the carriage, of mecha.- nism for setting back'the carriage including 1 a back-setting key, and a sring which is 1909 i o said key und Y, acts to set back the carriage when said key 15 strained by the actuation is released, substantially as set forth. p

-14. The combination lwith a paper carringe, printing ,mechanism,- and power drivenmea'ns controlled by 'the printing mechanism for producing a step by step forward movement of the carriage, 'of mecha Ilism -for setting back the carriage'including a back-settmg key, a spring which is strained by 'the actuation of said key', and

-means actuated by said spring when said key is 'released und voperating throu l1- said ria e, substantially as set forth.

l itness my hand, this 2nd day of October.

osoARc. KAVLE.

Witnesses:

.CHESTER U. REID, -O'rro A7- SCHILLY.

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