US1988232A

US1988232A - Typewriter

Info

Publication number: US1988232A
Application number: US516195A
Authority: US
Inventors: John H Barr
Original assignee: BARR MORSE CORP
Current assignee: BARR MORSE CORP; BARR-MORSE Corp
Priority date: 1931-02-16
Filing date: 1931-02-16
Publication date: 1935-01-15
Anticipated expiration: 1952-01-15

Description

Jan. 15, 1935. J, H, BARR 1,988,232

TYPEWRITER Filed Feb. 1e, 1951 2 sheets-sheet 2 www Patented Jan. 15, 1935 PATENT OFFICE".

TYPEWRITER John H. Barr, Ithaca, N. Y., assignor to Barr-S Morse Corporation, Ithaca, N. Y., a corporation .y

l of New York Application February 16,;163L seria1No;,516,195 15 Claims. (01.197764) I This invention relates to typewriters, and` particularly to the control ofthe travel of the carriage in letter spacing direction.y Heretofore, itk has been'customary to provide tabulating mechanisms for typewriters, -but during-a tabulatingoperation; the movement of the carriagefis notv retarded and' therefore its rate of travel accelerates throughoutv the duration of a run, with resulting increase in the momentum of the carriage. The abrupt stopping of the rapidly moving carriage creates objectionable shocks, vibrations and jars. 1 f i An object of this invention is to provide ran improved mechanism for releasing the carriage 15 from its escapement, and for controlling its `travel in atabulating operation, in a novel and simple manner, and Y with which the rate of travel ofthe carriage when released lmay be selectively controlled.

A further object of theinventon is to provide. improved tabulating and carriage release mechanisms, lwith which the rate oftravel of vthe carriage, Awhen released, may bev controlled to any desired extent,v` with Whichthe control of Vthe `carriage Will be 'eiective before thercarriage is released,l and which' will be exceptionally simple, compact,' dependable, durable andl inexpensive.

Various other objects' and advantages will be` 30 apparent from the following description of an embodiment of the invention, and the novel features will be particularly pointed out hereinafter in connectionwith the appendedclaims.

' In the accompanying drawings; t

Fig. 1 is a plan of a portion of a typewriter having carriage releaseand tabulatingmechanisms, constructed" in accordance withA this invention;v U

Fig. v2jis` a sectional elevation of the same, 40 withthe section taken approximately along the Fig. 3 is a bottom plan of part of the details shown in Fig. 1; j l

' Fig/i4 is a sectional elevation of the mechanism of Fig. 1the section being taken approximately 'alongthe line 4-4 of Fig. 2;

Fig. 5 is airear elevation of part of the mecha- In theillustrated'embodiment of the inven- 'A tion, the typewriter includes a, frame 1 (Figs, 1.

Vor guide `which 'extends along opposite edges w55 andf2) havingfa forwardly "extending section-11. A carriagetrack or guide -12 is supportedl from frame 10` in any suitablemanner, such as Ebyl postsiB. A'carriage'14` is provided with a track i ofthe track `or guideA 12, 'and anti-friction balls or rollers 16 maybe interposed between`th'e tracks 'or-guides 12 and 15'. By this mounting the carriage may travel from side to'side lof-the frame -10 inwhat is known inthe art as' letter 10 spacing travel.

Ale'tter spacing, or step'by step, control rdevice 1'7; which isjalsocommonly known asan escapement device, is suitably'mountedv'onllan auxiliary frame 18 carried by the vbase orfframe V.i5 10. This escapement device includes an escapev ment Wheel 19which drives a pinion- 20 through y a ratchet clutch-21. VThe pinion 20fmeshes with a rackbar 22Which is -mounted on andy travels with the carriage; The carriage is actuated in 20 letter spacing direction by the usual spring actuated ilexible strap-23,(Fig. 5)", this movement being regulated by the escapenent :device 17. The ratchet clutch 21 permitsthe return travel of the carriage without operation o f-,the escape- 2'5 ment wheel, as usualy in present typey'vriters.

An operating :member orlever 24, (Figs.` 2 *and f 7) is pivoted by a pin 25 to an upstanding arm 26 of vthe escapement frame 18, andthis lever '24 is provided with a laterally'extendinggarm 3o 27 which engages in anvarmular groove "of the movable member 28fof the rcllitcrh`21jso that when the lever 24 is rocked*itrwillvjfshiftf the movable clutch member'28 into disengaged'relation with pinion 20, and against-.the action-of clutch spring 29, (Fig. 2).Y v y I The lever 24 has a ,free 'endg 30 extending into a position for'l engagement vby a'cam 'bar 31 (Figs. 2 and 4)r which is mounted'on'. and moves with the carriage and forms part lof the 'car-f 4.()k riage release mechanism. One. form 'of such carriage release mechanism is disclosed* and claimed in `my prior patent, 1,697,899, v-issued January 8, 1929 to which referencejmaybe had fora full disclosure. `The cam gbarlrisoperated laterally of its length towardand from the lever 24 by a lever 32, as explained in said patent. When said lever 32 is'operated, thej cam bar 31 is depressed vfand engages'and rocks'the u lever 24 in a directionto disengage the clutch 50 from the pinion 20 andrelease `the carriage.' The carriage 14 is also 'provided' with ade"- pendinswinging, tabulating frame k33 (Figs. -2 and .5); on the scale bar 34 of vwhich '1 are mounted any desired number of tabulator` also bent angularlyandrotatably mounted `iii-an of travel of the stops 35.

10, adjacent ,tottheifrear edge of jithe: typewriter,k

and is rotatably mounted adjacent to its ends in bearings 38 and 39 (Fig. 3). The rod 37 e tends in a direction approximately parallel to` the direction of letter spacing travel of theicar riage.

which the rod 37 extendsfor the rod a'rhas fixed thereon an arm 41 which extends through the opening into a position-adjacent jtoftle :48w limits A screw 42 (Fig. 3) in the bearing .endro'seimoremsntzofftherod:.37.:in;,onegdirection,

sind: axcollar ,A3 yonzithegrrod 37, :by its; abutting faussement .unthaithe bearing 3.9:,1imits endwise movementnofathefrdd :.B'r'in.; the other direction. i'liheeendzfoff thernodmwhichfis adjacent .to`V` the bearinsii'iiis )bant laterallytorfonn `acrankzarm tthstfextendsfunwardlythrough an opening A45 nithennlateel 'and isgpivotally connected tofone @W129i iaiflnkffolnrodr- The `10cl1`46 lextends for- Nsa'ndlmofz thetnpewniteriandalong-the extension 11 of the frame 10 (Figs. 1 and 6) a-ndgat its forwalidend.ispivotallyxconnected to one.:a rrn Vof arbol! crwnkfleverfiI-whichin ,tur-n is'ipivoted in anbearngztplatef 48;;0 the ,-'frama i :F516bell:showdown-474s connected-,to .a tabulaterv iLkQY- 4,9., grand the latter .fis guided in its umyement: by- .they lever-A7 andy by ia spring actued lverrQ to which the'skeyi 49-zis,alsopivotally mnnected. When 1- ,the key 4,9 :'fis depressed, -the rod 37 `will he lrockedl @regularly --iin a Counters y .tlmbrace arm-41 andisspivotally connected to the armgllrby thef-pin52. .i'Il-ief other end of the link fisnprpyided with]v an `aperture iin which .is rotatably sqpportedanangular end-53 of a .stir,r rup element 54. `The othenendf element54is aperture Jn. i, the ,end L30. .,of A...the lever 24 which actlllsh. .cl'llilqhl `,'Ihe Vlink ,451. thereforev is .supported ,at lone .end .i for tpivotal .and endwise fmteinent by .therocking of .theelement 54 in its 69ml-action to the leverZl. .,In ,this `.`r`espect"the element acts something like astirrup -which therefore when it is shifted, .through `ac'ztuati'on ofgtabhiator.keyjasfirito, rhepathhf a tabuiator stop; .that is, lflom ,the positionshown in Fig. 2`,'nt the positionshowningigql the forked .endl-.prime @link 5.1 vwill pibe elevated .and also mivfd `tornarcithe,escaperxient,device. .'lnelink 51,.betw6e31-ts-ends, .ispr,ovided a. .brake shoe Qrpa'd 55. whichis.bronghtintoengagement withrasln'faqe of ,thenarriagesuchas the lower At a point adjacent f to bearing 38, .the plate 10 is provided withjanpeningl acrossv edge of the carriage guide 15, when the link 51 is elevated through upwardy movement of the arm 41.

The shoe or pad engages the carriage `be Y fore the arm 41 is fully elevated, and hence during further movement o f arm`41 thevshoe or pad 55 will rock upon the carriage as a fulcrum, and the .endnf ,thelink 51 Ato which .thefelernent 54 isdconneeted` Willczbe depnessed. Thejdpression of that end of link 51 creates'a downward pull mppon the stirrup element 54, and throughit rotates the lever 24 to open the clutch 21 and "1"'elease the carriage from the escapement'device. The,,carriageisthenfreeto travel until stopped bylthe.engagement,`f' atabulator stop 35 with the arm,4 l,-`and :during such travel the carriage n is frctionally retarded by the brake shoe or pad ir55, s'ofthaty its Jmoverrient isv not too rapid.

Thot-bearing 39 for the rod 37 is adjustable laterally of the rod 37 to a limited'extent by vreasonof; slots-56, (fEig: 3l :intherbearing through that vwhen the carriage 1.isre1eased-=or itswfitee {tabulatingf movement-thearmi411willi betexactly .in line with the stopy 35'V for :proper .engagement therewith. f

y Infoperation '29 suppliesgtheinitial:spring-#tensionitouholdrthe .pad-55 against the. carriage. ..Whenthe link-.51 is operated, as has been alreadyf-desribedH-to disengagethe ,clutch @.21 the action Acompressesv Ath*@clinton` `spring29. @The yramaunt-.of compressorrotthe springh29 isfli-mitedeby fthepossible motonofA the clutch piece, but` the key 4&9` mayy be still .further depressed because of flexibility of connectingpartsVand thegreater this depression .the tgreateiptlfie :amount: of ,pressure whichw-ill be applied `to `the v.pad 55, andA consequently the greater the frictional resistance against thepull of the,carriagedriving means ,23,7 vand the slower thefmovementof thecarriagefand'the -less the impactfat stop.. *Y

.This depressioncf s key 49 .is Lregulatedrby 4a stop,.screiivj,49o-,FigL..6, locatedJ in.a rigid lmember of vthe typewriterirame, aszll, so'that wheni-the key 49,isidepitessedlintthe operation of tabulating, .itsf 'd' wnwardmovementgis lxnitedandgcontrolledrbytsaidstoprsciiew 49a.,A ,It screw :is adjusted to shorten the downward travel; of ikey 49, then the amounttof ,f .pressure iori-Spad 4,55 is lessened landQ-thescarriagewill move withl relatively greater speed becausef less friction.. 4If

the stop ,scr.ew,49a .be adjusted allowegreater depression of' key '49,k then greater pressure takes place, with =greater tensionP applied.` to pad,5'5,an`d

the speed offjtiavelof .the}.carriage correspondingly lslowedfclnwn. Wear of .theirictionpad maybe compensated forby Lthe adjustment-of the screw 49a. y v It will benoted `that inthesequence of functional performance Vofftlfie'y parts. las described, thefrictionaltcoritrlpf .carriage will .be applied before ,the vclutchnof .the escapement 4mechanism can be disengaged to release carriage `forfits .free travel, and after .the .carriage lha-s reaehed '.the end df saidtravel, .and cornes to .restagainstlthe .tabulator stop, this frictional control is not removdQ--untilafter the `teeth of the clutch have againengaged' This prevents rebounding of the carriage and the .possible incorrect engagement .of clutch teeth.

The operation of the device would appear. to be clear fromy the foregoing description, but will be briefiy set forth. In the normal use of the typewriter, the tabulator key 49 is elevated, the arm 41 is in its lower or unobstructing position, shown in Fig. 2, yand the clutch between the escapement wheel andthe pinion 20 is effective .or.c1osed. The carriage is given the usual-step by step letter spacing movement during the operation'of the printing mechanism, and may be returned to a new position for the beginning of anew line. f i If one desires to release the carriage for movementin letter spacing direction independently of the escapement device, it is merely necessary to operate the carriage release mechanism through the lever 32 (-Figs. 1 and 4)'. Through operation of this .lever the cam bar 31 is depressed and this bar in turn rocks the lever24 to open the clutch 21 between the pinion 20 `and the escapement wheel 19.'v 'Ihel carriage then travels in either direction WithoutY restriction by the` escapement device. When the lever 32 is released, it is returned to its normal position by its own mechanism, as set forth' in my prior patentv hereinbefore referred to, the spring` 29 of the clutch returns-theclutch to closed position, and the lever 24V is, returnedito its normalv by reason of its support by the stirrup element 54. As soon as thelshoe kengages the carriage, the link 51 will `be rocked upon the carriage as a fulcrum, at the shoe, the stirrup element will be pulled downwardly, and the lever Y 24.will be rocked in a direction to open the clutch and release the carriage for free travel independently of the escapement wheel.

.Thisfree travel of the carriage is retarded however by the pressure of the brake shoe 55 upon the carriage, andthe carriage will travel until stopped by the engagement of a tabulator stop 35 with the free end of the arm-41. There` upon when the key 49 is released, the parts will return to normal positions andthe Ybrakeshoe will be removed from its engagement with` the carriage. It will be noted that in the operation of the tabulator mechanism, the brake shoe is always applied to the carriage vto control the vtravel of the latter, before the clutch is operated to release the carriage, and is not disengaged been herein described and'illustrated in order to explain the nature of the invention, may be made by those skilled in art within the principle and scope of the invention, as explained in the y y riage, tabulatng mechanism operable upon said' clutch to disconnect the escapement device from said carriage and a rock shaft mounted in a pairvof bearings andhaving a single stop arm for positioning .in path rof travel of saidl carriage, one of said bearings embodying means for adjusting the shaft and stop longitudinally theretoland the other bearing adjustable laterally. 2. In a typewriter, a frame, a carriage movable onA said frame in letter spacing direction, a tabulatorr stop mounted on said carriage for travel therewith, an `arm movable into and out of the path of travel of said stop with lsaid carriage, meansfor causing step by step movement of said carriage, including a clutch operable to release said carriage forfree travel in letter spacing direction, means connecting said arm and clutch, for operating, said clutch to release said carriage when said arm moves into the path of travel of vsaid stop, and meansop'erableby said connecting means and engageable with said carriage by the movement of said arnifi'nto the-path of said stop, for frictionally controlling the free travel of thecarriage. 3. `A typewriter comprising a frame, a carriage movable on said frame in letter spacing direction, an escapement device, means including a clutch for connecting the escapement device with the carriage and controlling the travel of said carriage, a tabulator stop on said'carriage movable therewith, a pivoted arm swingable into and out of the path of movement of saidstop, a link pivoted at one end to said arm, a clutch operating member, an element pivotally vconnected at one end to said clutch operating mem-v ber and at its other end to the other end `of. said link, whereby as said arm moves into and out of the path of travel of said stop, the end'of the link remote from said arm will; swing idly about the connection between said element and clutchv member, and a brake shoe connectedwto said link, and engageable with said 'carriage When said arm moves into the path fof travel of said'r stop, whereby continued movement of said arm in the same direction will cause rock-l ing of said link by the engagement of said brake shoe as a fulcrum and through said element op-` erating said clutch to release said carriage frox'n nected therefrom by said clutch, a lever operating said clutch, means carried by the said carriage and-operable on said vlever to release the carriage, tabulating mechanism also operable` upon said lever to release the carriage and stop it after a desired position isreached, and means operable by said mechanismr vand lcontrolling the @rate ,of Y'travel ioffysaid carriage when .said fear# .riage-:is released. 1.,

57.- In. a :typewritenza frame,r acarriage .movable l non. said tramejin :letterspacing-direction,ia step by step control device, means.cconnectins` device to said carriage including :a Lclutch, whereby sadgrlevice normally controlsi ther-travel of Y#the carriage, -stepwby step,l and :may be discon- .nected therefromby .said clutch, va `lever Voperat- .ing` said clutch, means Vcarried ,by Y the said carvriage and operable on fsa-id :lever to release `the rcarriage, tabulating mechanism also operable Vupon .said flever togreleasefthe carriage .and stop it after a desired; :position i'sreached,` and a brake carried and operable by Vsaid ftabulating mechanism into trictiona'l engagement with said carriage @when '-said lever is `operated to `release Athe said carriage.V f

lsaid tabulating. -meclf,1 anism,f.or, controlling Ythe rate of travel of --carriage.` y f 3 -7. VIn antypewritelnlafframe, ar carriage move able along said frame in1v letterspaci-ng;direction, a step. byV-step control device, means,k including agclutcli connecting `said device to said carriage, whereby` said carriage may Lbe` released from said device .by operation ,-ofsaid clutch, anoperating.member Yfor. v,said clutch, an element ,piv-

oted .at one end to said member,l a` link pivoted' tothe other `end of the said-element, a `tabulator stop movable ivithvsaid carriage, .an arm pivoted onsaid frame 4for. movement into vand out o1' the vpath of travel .of said stop with said carriage, the `other end of :said '-lin-kbeifng `pivotally connectedlto said arrn,-a brake padicarried :by said link and operable:tlierebyA into engagement with .said carriagel by the movement of said-arm into .the ,pathof saidstop, whereby continued movementof said arm in the-samedirection will pressthe` pad against the carriage to :frictionally control `theI rate of traveloiv thecarriage, and

Will .also rock. thelink about said lpad as a fulcruxnto .force said-operatingmember -i-n a direc-l tionto release. said clutch and disconnect -the carriage from., said .dev-ice. ,l 1 i "8. In a typewriter, a trame, acarriage movable along the .frame in letter spacing direction, a letter 'spacing control device, means connecting said device to said carriage and lincluding a` clutch, ja lever pivoted`4 on said frame and Loper,- ating sai'd clutch., lan element pivoted to said lever rand depending therefrom, a link 'pivoted 'at one end to thedepending end of said element,

mechanism including 'a pivoted carriage travel limiting arm in turn pivoted to th'e otherend of said llink, the .axis of oscillation of `said pivoted armbeing approximately parallely to the axis ofr the .'pivoted lconnection of said-link to -said element, and airbrake pad carriedby said link and engaging v'with lsaidcarriage when said mechanism is Yoperatedfto klimit the travel of said igcarriage', :whereby...upon. operation of :said

-arm finto' carriagedimtting mosi'tnoxi;A frst will 'rockabout rits r connection fto said tele@ fment until :said -brake* engages Fsaid.y carriage;v and then upon thecarriage .'ascagfulcrum. toxlpull upon said element, rock said leverand disengage lthe clutch. l n Y 19. :In a. itypewriterpaeframe, :acan'iageimov- .able along the .frame'in letter .spacing direction,

.a letter:spacingfcontroldevice, means connect# ing :said device' .to said carriage andxiincludinga clutch, 1a lever ,pivoted on ;saidframe azndeopereating said fc'lutch, anzialment-pivotedntosaid :lever and Jdependingtherefrom, alink pivoted at one end lof the fdepending 'fend of.;said element, mechanism. .including a pivo'ted Afc'arriaaxgre vPtravel limiting. 'arm in .tum ptvotedxto the other-Lend of said link, the axis of oscillation offs'aidiplvted armbeingaapprcimately parallel the'axis of.

brake .engages said carriage, .and 'ltliene viupon the 'carriagel'as a fnlczium to'pullluponsaidfelement, rock saiijdflever and disengage thelcluteh, and meanszcarriedirby the carriage and operable vu-pon said` lever "in .all 'positionsofV -theewrriese for rocking 4said, :lever to lopen #the clutch operation of "said1.mechmflisml f f 5551;(1; an' a t 'write 51a, r fr epa carriage movable along said frame in letter spacing direction, a'rod extending" approximately parallel with 'the direction of `traveloffsaid' carriage;f-a'fpairfof bearing'stlfor-said. rod'spaoed vapart along the length fof fsaid rod, anf'arm fl'xedfiupox-r-:saidrod to extend Slatera'lly tnerefrornv adjacent y-one'enii oflthe rod, the-bearing a'dja'cerV 'tothe/otherend of .the rod fbeing Vadjustable i lrectionllatenally @of v.the length oflsaidyroel, sa d'jotherfend of the 4rod 'having-a eran-k section, mechanism carried by said frame land connected'lto'saidcrank section for rocking said `-about its longitudi nalfaxis, a stop@movable with said' "carriage 'in letter spacing fdirecti'on, the '-'free end-of 'said "armY being' normally out of 'the path-fof l said' stop and operable into can'iag"limitingposltiorr when said meehanismfis oper-ated, alinkconnected to saidarmymeansmounting :thefothe'r en of said link for" pivoted and endwise A-m'ovement,"a brake Aoperable by 'said linkfinto engagement with `the carriage to retardffrictionally 'thel travel of the carriage, letter spacing control-mechanism connected to-said -carriag`e, and means" operating automatically andlconcomitantly 4with the' operi' ation of `said *forreleasing-saiid 'carriage from Athe control -of said `letter` spacing control mechanism when said arm 'is shifted into' posi-y tion Vto limit travel 'of the-carriage. n

`11. In a typewriter,- aframe, 'a' carriage mov' able along .said frame 'in letter spacing direction; a rod extending vapprloximately parallel with vthe direction of ctravel of said' carriage; a pair of bearings for said) rod gs'pa'cedy apart along the length of said rod; an arm fixedupong'said'rod to extend laterally ,therefromA adjacenttoione end of the rod, the bearing jadjacenttothejother end Aof the rod being"` adjustable" 'in -afdi`rection laterally of the' lengtliofsaid "rod, 'said' otherv end -of the -rod havingfa'cranlr section",rnechafl nism carried by said frame and connected'with said crank section forrocking sali'd'lrodk about its longitudinal' axi'sf,fa stopflmovable withrsaitl-fear?"- rage during letter spacing travel, vthe free end of said armbeing normally out of the path of said stop and operable into carriage limiting position in the path of said stop when said mechanism is operated, said arm being adjustable angularly about the axis of said rod by lateral adjustment of said other bearing, and means operable concomitantly with said rod and arm for releasing said carriage for travel in letter spacing direction until said stop engages said arm.

12. In a typewriter, a frame, a carriage movable on said frame in letter spacing direction, a, tabulator stop mounted on said carriage for travel therewith, an arm movable into and out of the path of travel of said Vstop with said carriage, means for causing step by step movement of said carriage, including a clutch operable to release said carriage for free travel in letter spacing direction, means connecting said arm and clutch, for operating said clutch to release said carriage when said arm moves into the path of travel of said stop, means operable by said connecting means and engageable with said carriage by the movement of said arm into the path of said stop, for frictionally controlling the free travel of the carriage, means including a tabulator key for operating said arm, and adjustable means for limiting the movement of said key in a direction to release the carriage, whereby the friction on said carriage during its free travel may be varied by adjustment of said limiting means.

13. In a typewriter, a frame, a carriage mounted on said frame for relative travel in letter-spacing direction, an escapement controlling the letter spacing travel of said carriage device, a tabulator stop carried by said carriage, an arm shiftable into and out of the path of travel of said stop with said carriage, tabulator key mechanism operable to shift said arm into the path of said stop, means operable by said key mechanism concurrently with the movement of said stop, for releasing said carriage from said escapement device, a brake attached to and moving with said arm and engageable with said carriage to control the rate of travel of said carriage while said arm is in theY path of travel of said stop and said carriage is released from said escapement device, and means for limiting the movement of said key mechanism for varying the pressure of said brake on said carriage during a tabulating operation.

14. In a typewriter, a frame, a carriage mounted on said frame for relative travel in letter-` said stop for releasing said carriage from said escapement device, a brake attached to and moving with said arm and engageable with said carriage to control the rate of travel of said carriage while said arm is in the path of travel of said stop and said carriage is released from said escapement device, said arm being mounted on a shaft for oscillation therewith in its movement into and out of the path of said stop, and bearings for said shaft adjustable to shift said shaft both laterally and longitudinally at said arm in orderv to adjust the brake and said arm with respect to the stop.

15. In a typewriter, a frame, a carriage mounted on said frame for travel in letter spacing direction, means including an escapement for controllingr letter spacing travel of said carriage, key operated means for releasing said carriage from'the-control of said escapement, yielding means for operating the carriage in letter spacing direction when said carriage is free to move in that direction, a brake operated by 'said key operatedl means whenever the carriage is `re moved from the control of said escapement, said carriage `having a non-yielding portion engageable by said brake, ywhen said brake is operated by said key operated means, for frictionally controlling the travel of said carriage while said carriage is removed from the control of said escapement, and an adjustable stop limiting the movement of said key and thereby the degree of JOHN H. BARR.