US1453580A - Typewriting machine - Google Patents

Description

May 15 A F. H. ARMSTRONG TYPEWRITING MACHINE Filed Novt 165,191?, s sheets-sheet 1 4 May 1,1923. y f

f F. H. ARMSTRONG TYPEWRITING MACHINE 1918 s sheets-sheet 2 Filed Nov, 16

l K A tm/l.

May l, 1923.

F. H. ARMSTRONG TYPEWRITING MACHINE Fild Nov. 16,1918 sheets-sheet y Patented May l., 1923.

mias-ai nRANK H. ARMSTRONG, on AUBURN,V NEW YORK, 'assrenon To sonoma Tyrnwnrfr'nn COMPANY, me., OF., GROCLON,v 'NEW YORK, 'Aeogeoea'rron ,OF NWSYORE. f p

TYPEWRITIN'G MACHINE.

Application `filed, November 16, 13,18. Ser'aLNo. 2625328;

To all whom t may concern.'

Be it known that I, FRANK H. ABM-- STRONG, a citrzen off the United Sta-tes of America, and va resident of Auburn, County 15 of, Cayuga, State of, Nevy York, have'l in- .vented certain new7 and useful Improvenl ents4 in Typevvrting Machines, Oifwhieh the, :folloyvingis a full and Clear specification.

.1,0 Tliisinvention relatesfto vthat Classof' paper@feeding,l deyiees broadly covered by mycofpending applieationerial No. 2,576,195, filed September 3Q, 1918., and the present improvements relate to devices for, support 15 ing the feed-roll shafts ,and releasingj the feedfrollsfronnthe. platen, as more fnlly hereinafter. 'set forth, `In fthe., drawings Fig. l is .a vewpartly in plan and partly 2 0 in herizontal section ofrso much of a. platenearrage asis neeessalytoshow my present improvements Fig. 2is a transfv'erlse vertical sectional vievv on'the line2-2` O.Fig,` l.; i

Fig. isa vertical longitudinal Vseetienal viewtaken on thelines 3 3 ofj Fig. l;

Figfe` isa seetien, takenA on tl1e lineA2 ,-2 oiEig. l. showingy therear .feed-rolls withdrawn from the platen;

Fig. a` similanview showing both the front and the near 4iieed-rrells Withdrawn from the platen;

Figs. ,6,7, 8v, 9 and. l0 are detail views herein after `described l1 isa detail v -ieW showing a modification hereinafter described g,

Figs. l2fto 'l8-` are detail views of other modifications, f Bejerrin@l to` the dnawings annexed by reerenee-,cliaraeterm designates a. platencarriagefprelvided at eachfend` 1with an upstanding flange' 16 which rthe ends of the shaft lffof'tl'ie platen 17 Vare journaled in thelusualmanner."

, 4,5 Ezit'ending between thei end-flanges' 16, the

iullflenth of fthefearriage, yis a rock-shaft 18 ;.W.lise ends yare j onr'naled in` saidhflanges 1,6. This. shaft isloat'ed behind. the platen,

ata, point abouton a vvhorizontal, level with provc'ledv with four forwardlyextending arms 19, and in -holes formed inihe 'forward ends ofthese arms are journaled gtheftwo' rear lfieed-roll-shafts y2O, each elryingagpair of Vfeed-rolls 22 loosely mounted OnftheSlhrft and spaced apart vhy- 'a looselyfn'aounted sleeve` 23. The arms 19. are 1 attached, t'ogthe rook-shaft 18 by, each havingitsfrear `end formed into an,` areh- 24:--Whose 'depending members24 are provided with holes forthe passage of said shaft, 4each-Or these mem-y bers 24: beingiprevided, .at `its' lewer',jerijl'n-v that is, `at a pointv under the shaft 18,-vvith ay lateral lug' 25 lying in anotch T26 formed y 65 in a collar-,27- a'lixedto theshaft alongside the member 424 by means of a set-screw 28,/

The tWoeed rollZro-nt shafts 29=eachcarry a, pair Ol feed-rolls 30 looselymounted on theshaft and spaced apartbya loose sleeve 3. l,vthe ends of each shaft.' being j-ournaled in npstanding lugs 32` formedintegralJ-With the forward;v 'ends of A-apair of. transverse bars 84. The forward ends ely thesebarsifB/l provided with upstanding stop-lugs A,75l

which prevents undue kendvvise;movement of the shafts 29. The rear-endspf lthe,endfba-rs 34 pass rearwardly under the 'rear .shaft 2O and have their rear endsbent upwardly and rearwardly `and vdovvnwardlyto ferm-a hook 36 which is enga-ged Overlvhe reckfshallt 1S torthus tie the end-.barsand the front sh .29, to the rock shaft. These, heoks .engage-i they shaft at, a.l point between the fanghmembers 24 and are thns'prevented from undue lateralmovementfon-the shaft "and there is sufficient space between the sha-t' 18 and the top (,244I of the areh to permitlthe o rearfends of ther ban to hanea limited v e ical play independentlypithe re 'feed- 1'f. l.l:s./}2.` forined integrallanitneah u Y y ,Y is a lateral v lug 37 vwhich engages ,y the upper face olf-,the adjacent one., Ogtthebarsff.

Shah 1S. mar befQIWa-rflel lne/leed in, am snitable` manner.; L prefer the;A `means ill-ustrated in my aforesaid copendmgr appllarm 71.9. 90A v tion, which consists lin .affinnig to vone end'. 1

ofethe rocksha-t a vflviarcl n SSand providinga cam-lever 39 mounted@ on .the platen-shaft 11W). prov v with we Sterf-fassa e@ @del o;

reo

alternately engage the upper edge ot the arm 38, said arm 38 being normally drawn upwardly to thereby hold the rock-shaft and its connected parts in normal, working', position by means or' a coil-spring 42.

Any suitable means may be employed to resiliently and uniformly press upwardly against they transverse bars 34 to thus keep the feed-rolls against the work on the platen; for instance, I may employ the devicesshown in my aforesaid copending application, consisting of twolongitudinal bars 43, each bar being pivotally supported upon and inteilocked with a rockable plateA like yoke-member 44 pivotally mounted upon the topvof the platen-carriage, these rockable 4members being normally pressed upwardly (to thereby constantly press bars 43 against the under side of end-bars 34) by means of acoil-.spring 45 arranged at the rear ot the rock-shaft 18 and connected to upstanding arms y4G mounted `at the rear ends or" the rocking plates. f

lt will be observed that when the release cam-leverl39 is swung rearwardly to thus bring its stop-surface41 into engagement with the arm 38, the rock-shaft 18 will be in position to hold the arms 1 9 Vin a substantially horizontal position` in which posi tion both feed-rolls will be in contact with the work on the platen, the bars 34 willbe pressed upwardly against the lugs 37 and the hooks 36 will be held lightly in engagement with the under side of the members Q 2 4. lVhen the lever 39 is manually swung forward to ldepress thenarm, 38 and bring the cani surface into position tor locking relation with .this arm 38, the successive movements of the parts will be as follows: The

rear rolls 22 will be swung downwardly about the axis of the rock sha-tt away from the platen, and the bars 34 carrying the` hooks 36 will be swung sin'iultaneously downwardly against the action ot spring about the kaxis of the front teed roll shafts until ythese hooks engage the topside of `the rock-shaft; and then further rotation of the iocloshaft in thesame direction will swing arms 19 and the' rear rolls :'i 22 fartherl from the platen and cause the lugs. 37 to continue to press'upon the upper sides of the. end-bars 34 and thus, in the manner of a knuckle-joint, swing simultaneously down the forward ends of said bars and take the front rolls away from the platen, said bars swinging in unison with the armsy 19 about the axis of the rock shaft, the parts being held in this off position by the stoptace 40 of the release lever, as shown in Fig. 5.

It will be observed that all the feed-rolls are normally held against the platen by the Wiring-means which forces pressure-bars 43 upvf'ardlygthis spring-means in the pres ent instanceis a single spring 45, but it will be understood that the arrangement for this' purpose shown may be greatly varied without departing from the lpresent invention. It will be observed further that each pair oi' eed-rolls, whether frontor rear, may yield away from the platen without releasing the remaining rolls, thereby enabling the rolls to automatically compensate for variations in the platen surface as well as for variations in the thickness of paper. It'will be seen also that the construction described ensures alineinent between the axes o't both the t'ront and rear feed-roll-shai'ts and the surface of the platen, while at the same time all undesirable floating action of the feed-rolls is entirely avoided.

In the modification s liown in, Figs; 12, 13 and 14, it will be observed that instead of the hook 36 I connect each ofthev bars 34 to the rock-shaft by means of ,a pair ot' upy standing ears 52 adapted to fit between the arch-members 24, these ears lbeing provided with holes through which the rock-shaft 1S `extends and these holes being vertically elongated to permit the necessary lost-motion or play between the bars 34 and the rock-shaft. i

ln this modification, thevarch-niembei's 24 extend rearwardly instead of upwardly,so that the 4connecting arch-member (24') liesv at the rear ot the rock-shaft. l

In the modiiication shown in Figs. 15 and 16, the hooks 36 are employed, but the vertical limitation ot movement of the bars 34 is obtained by providing the depending' end of the hook with lateral lugs 53 which engage under the arch-members 24; whilein the iorm of device shown in Figs. 17 and 18, the upward movement of the rear-ends of the bars is restricted by means of a lug 54 extending rearwardly far enough to engage the under side of the arch-member 24.v It will be observed from the foregoing that the losteinotion knuckle-joint connection between the rear ends ot the bars 34 and the actuating rock-shaft may be greatly varied without departing from the spirit of my invention.

rlhe rear leed-roll-shafts may be held against undue endwise movement in substantially the same manner as the front shafts are held. these front shafts being desirably held against endwise movement by meansot' upwardly-heut ears on the forward ends of the bars 34; for instance, one of. the karch members 24 maybe provided with an eaixor lug 5() extending forwardly tar enough to form an abutment for the adjacent end oi the shaft 20, or the top member 2.4 (which connects these members 24 may be provided with a torwardly-extending lug 51, as shown in Eig. 1l, or as shown in Fig.. 13 the lu'g37 may be turned upwardly to'form a stop-'lug 52. lt will be further desirable that the lugs'25 shall have a slight lost-motion inv the platen a' limited distance without rotating the rool .-shaft-18, as-shown more.vv partandem feedfroll shafts, feed-rolls on`- said tandem. shafts, independent supports for the front and rear feed-roll. .shafts extending forwardly from the cast-off shaft, connectionsV between the rear ends of said supports and the` cast-olf vshaft whereby either rollshaft` may move away from theplaten in-` dependently of the other while the cast-off shaft isstationary, and means whereby, first one and then both vof said shaft supports is rockedy away from the platen about the `axis ofthe east-off shaft when the cast-off shaft l isvrocked in, one direction.

, 2. In a paperfeed mechanism,the com. bination of a platen, a' cast-off rock-shaft extending.longitudinally of the platen,means for rocking said casteoff shaft, a pair of tandem feed-roll shafts, feedLrollgs on saidv tandem shafts, independent supports for the front vand rear vfeed-roll shaftsfextending forwardly from thecast-off shaft, connections between the rear ends of said supports and the cast-off shaft whereby either4 rollshaft may move 'away from the platen independently of the other while the cast-off shaft is stationary, means whereby first one and then both of said shafts supports is rocked4 away from theA platen about the axis of the cast-off shaft when the cast-off shaft is rocked in. one direction, and spring-urged means common to both shafts for yieldably forcing the shafts toward the platen.

3. a paper feed mechanism, the .combination of a platen. a cast-off rock-shaft ex* tending longitudinally of the platen, means for roc-kings aid Aeast-off shaft, a pair of tandem feed-roll shafts, feed-rolls on said tandem shafts, independent supports for the front and rear feed-roll shafts extending forwardly from the cast-off shaft, connections between the rear ends of said supports andthe cast-off shaft whereby either rollshaft ina-y move away from the platen independently of the other while the cast-off shaft is stationary, and means for yieldably holding the rolls on one feed-roll shaft against the platenv through the medium of the other feed-rollshaft support.'

4. :In a typewriting machine,` the combination of a platen carriage, a platen rotatably mounted on the.v carriage, a manually operable castfoff rock shaft j ournalled onthe carriage, a .rear feed roll, supportingmeans erfinden @aan iai-.waaien are@ 'rock shaft, a `front ,feedwfrolh supporting` means for vthe'.froritfeed roll vhavinglan upand-down 'lostmotion pivotal connection withthe rock shafty and engaging the under side of the .rear feed roll. supporting means, means for yieldably urging the` roll supporting mea-nstoward the platen,` andmeans lrigidly heldto the rock shaftengaging the. rear feed roll supporting meansfor successivelyr casting off the. rear and front feed rolls when the rock shaft isrotated inl onedirec tion'.

5. In ak typewritingmachina-the nationof a platen carriage, a platen rotatably `mountedfon the. carriage, 'a manually .opera-ble cast-off. rock. shaft journalled on the carriage, .a rear feed roll, means for supporting 'the rear feed ro-ll from they Aroclr yshaft 'to vhave a limited movement. toward and from the, plateny independent of rotation ofthe rook shaftk and ,to-swing away from the platen, about the axis of the rock shaft, when said shaft is rotatedv in one direction,

a front feed roll, supportingmeans for..A the front feed roll pivot-ally. connected -with the rock shaft and adaptedto be engaged ,and

roekedzabout. theaxis of the rock shaft by the rear feed. roll supporting means to v cast- I offx the front feed roll, and means commento both feed rolls for yieldable pressing the feedrolls towardthe platen.

6.v Ina typewritingmachine, the `combinationA of a platen earriage,a platen rotatably mounted.v on the earriage,a east-off rook shaft` journalled on the carriage, front and rear `feed ro-lls, independent supports for the feed rolls carrying the feed rolls adja-y cent their forward ends, yconnections be-` tween the rear ends of" said` supports land the rock shaftrwherebyeither feed roll may swing` away from the platenjindependently of rotation of the rock shaft, spring means common to both feed rollsfor pressing the same toward theplaten, and meanson the rockshaft for swinging the rear feed roll and itssupport away from the platen about the axis of they shaft, the support for the rear roll" being adapted to swing thesupport'for the front roll about the axis of they rock shaft during thefinal portion of its cast-off movement. i y o 7. In'k a typewriting machine, a platen carriage, a platen rotatably kmounted.thereon, a rockshaftijournalledonthe carriage, i

means forrocking said shaft, rock arms on theshaft, a reanfeed9 rol-lsupported by said rock ar1n`s,a front feed rolL members sup.- portingV :said feed roll .having lost-niotion pivotal connections at theirfr'ear ends with the rock "shaft and engaging under the rook arms, andmeans 'for yieldable pressing the meniberstoward the platen. y

i' 8. a ftypewriting ,machine` a,` platen carriage, a platen rotatablyyniountedthere` .a rock.sl-iaftv journal'led onthewcariiage,

means for rocking ysaid shaft, rock arms on the shaft, a rear feed roll supported by said rock arms, a front feed'roll, members supporting said front feed roll having last-motion pivotal connections at their rear ends with the roclr shaftand engaging under the roel: arms, and means for lexerting. a uniform pressure on said members intermediate the front and rear feed rolls.

9. In a typewriting machine, the combination of platencarriage, a platen rotatably mounted on the carriage. a cast-off rock shaft journalle'd on the carriage, means for rocking said Cast-off shaft', two pairs of supporting` members of different length extending in the same direction from thev rock shaft, connections between one end offsaid members and the rock shaft whereby when theA shaft is rocked in one direction the shorter pair of members will swing with the shaft away from the platen and then press thelonger pair of members away from the platen during the final portion of the movement of said shorter members, parallel feed roll shafts -journalled in saidpairs of-members adjacent the free ends of the members, feed relis onsaid shafts, and means on the carriage controlled by a single spring for urging both pairs of members toward the platen l0. ln a. typewriting machine, a platen carriage, a platen rotatably mounted onthe carriage, a manuallyrockab'le cast-off shaft journalled on the carriage, tandem feed roll shafts,`rolls on said shafts, independently supporting means for -the feed roll shafts pivotally held'at one end to the. cast off shaft and extending` in the same direction from the shaft, means on the rock-shaft adapted` when the shaft is rotated. in one direction to engage and rock the supporting s means for Aone feed roll shaft away from the platen and cause said supporting means after the roll supported thereby leaves the platen to lock the other' roll shaft supporting means to the rock yshaft and thereby cause both roll shaft supporting means to swing in unison away from the platen during further rotation of the rock shaft.

il. In a typewriting machine. the combination of a platen carriage, a platen rotatably mounted on the carriage, a cast-oft rock shaft `iournalled on the carriage, tandem fee-d rolls, independent supporting means for the rolls located at the same sideof the rock shaft and pivotally held at one end to the shaft to swing about the shaft, said supporting means beinginterlocked with each other against relative movement longitudinally of 'the shaft, mea-ns on the rock shaft for holding one 'of said supporting means against movement longitudinally of the shaft and adapted to looksaid supporting 'means 'to the shaft-to rock therewith away from the platen when the shaft is rotated in one lirection', the other roll supporting means being` roclable away from the platen by the supporting means which is directly locked to the shaft after a predetermined movement of the rock shaft.

' l2. In a. typewriting machine, the Combination of a platen carriage, a platen rotatably mounted on the carriage, a cast off rock-shaft j'ournalled on the carriage, front and rear feed rolls, independent superposed supporting means carrying the rolls at their forward ends and interlooked with each other against relative movement longitudinally of the shaft, the supporting means for the rear roll being pivotally connected at its rear end with the rock shaft and the supporting means for the front roll having a pivotal and limited up-and-down sliding connectionat its rear end with the rock shaft means on the rock shaft for swinging the' rear roll supporting means downwardly awa-y from the platen and Causing the same tofirst depress the rear end lof the front roll supporting means and kthen rswing said front 'roll' supporting means about the rock shaft.

13. In a typewriting machine, the combination of a platen carriage, a Aplaten rotatably mounted `on the carriage, a cast off rock-shaft journalled on the carriage, front and rear' feed rolls, independent superposed supporting means carrying the r'ollsattheir forwardends. and interlocked with each other against relative movement longitudinally of the shaft, the supporting. means for the rear roll being pivotally connected at its rear end with the rock-shaft and the supporting means for theY front roll having' a pivotal and limited up-and-down sliding connection at its rear end with` the rock shaft, means on the rock shaft for swinging the rear roll supporting means downwardly away from the platen and Causing the same to; first depress the rear end .of the front roll supporting means and then swing said front roll supporting means about the rock shaft, and spring urged means on the platen pressing the front roll supporting means t0- ward the platen against the rear roll supporting means.

14. ln typewriting machine, the combination of a platen carriage, a platen rotatably mounted on the carriage, a'cas't off rock-shaft jo'urnalled on the carriage, front and rear feed rolls, independent superposed supporting means carrying the rolls at their forward ends and interlocked with each other against relative movement longitudinally of the shaft, the supporting means for the rear roll being pivota ly connected at its rear end with the rock shaft and the supporting means for the front roll having a pivotal and limited up-and-down'sliding, connection at its rear end with the-rock shaft, means on the rock shaft for swinging .the rear roll supporting means downwardlyl front roll supporting .means about theroclr shaft, and spring urged lmeans onthe carriage loosely engaging under the frontroll supporting means intermediate. the front and rear rolls and pressing the front rollsupport-ing. meansupwardly against the rear` roll supporting' means. y

15. In a typewriting machine, arplaten carriage, a platen rotatably mounted onfthe carriage, tandem feed roll shafts, rolls on saidshafts. a cast-off rockV shaft journalled on the carriage, a pair of members pivot-ally held to said rock shaft supporting the rear roll shaft at their forward ends, a pair of members engaging under the first pair of members and supporting the front roll shaft at their forward ends and having their rear ends bent to form downwardly facing hooks through which the rock shaft extends, and means on the rock shaft interlocked with the rear roll shaft supporting members to permit the same to have a limited pivotal movement on the rock shaft whenl the rock shaft is stationary and to lock the same to the rock shaft when the shaft is rotated. 16. In a typewriting machine, a platen carriage, a platen rotatably mounted on the carriage, tandem feed roll shafts, rolls on said. shafts, a castoif rock shaftjournalled on the carriage, a. pair of members pivotally held to said rock shaft supporting the rear roll shaft at their forward ends, a pair of members engaging under thel first pair of members and supporting the front roll shaft at their forward ends and having their rear ends bent to form downwardly facing hooks through which the rock shaft extends, means on the rock the rear roll shaft supporting members to permit the same to have a limited pivotal movement on the rock shaft when the rock shaft is stationary and to lock the same to the rock shaft when the shaft is rotated, means on the carriage loosely engaging under the front roll shaft supporting members at points intermediate the front and rear rolls, and a spring for pressing said means upwardly against said members.

17 In a paper feed mechanism, the combination of a platen, a cast-off shaft. tandem feed-roll shafts, feed rolls on said tandem shafts, means for rocking said cast-off shaft, independent supports for said tandem feed-roll shafts, pivotal connections between.

said shaft supports and the cast-off shaft whereby either feed-roll shaft may move away from the platen when the cast-olf shaft is stationary, spring-urged means connected with the support for one shaft for pressing the same toward the platen and against the other shaft support, and a conshaft interlocked with lwardly about their pivots. f v

nection between the cast-.offfgshaft and said' v other shaft suppoitffor' forcing botlrfst'i'pf ports awayfrointhe platen.

. 18: Inapap'er feed mechanism, thegcomf.A

binationtof a platen, a cast-off shaft, means forfrockingsaid yshaft,'twov interconnected sets of rock arms' extending 1n thesame direction from Saidshaft and movable inde' `pendently thereof 'toward 1 and from 5 the platen, tandem feed-roll-'shafts supported by saidtwo setsk of lrock arms,.rolls 'on said'` tandem shafts, connections :between the cast.y off'shaft'fnandonezsetof rock arms for swinging both: interconnected sets lof .arms away` from the platen-when, the `cast-off 'shaft is rocked, a pressure distributing member connected with one of said sets of yrock arms intermediate the feed-roll shafts Afor pressing both interconnected sets of arms toward the platen, and a 'spring-urged support onv which said member is tiltably mounted substantially midway its ends to rock about an axis extending transversely of the platen.`

19. In a paper feed mechanism, the com-y bination of a platen, a cast-off shaft extending longitudinally of the platen at the rear BlH of said platen. a'plurality of pairs offorwardly extending independently rockable arms pivotally held atv their rear ends to the cast-off shaft, a plurality of rear feed-roll4 shafts each supportedby one of said ypairs of arms, a plurality of pairs of forwardlyl extending members havinglpivotal and upand-dow'n slidingconnections with the castoff sha-ft at their rear ends and loosely enof said pairs of members, feed rolls on the a.. gaging under the rock arms, a plurality o f front feed-roll shafts each supportedby one front and rear feed-roll-shafts, a plurality y of pressure-distributing members each vengaglng under one of said pairs of members intermediate the feed-roll shafts, yieldable means for supporting said members to l'move at either or both. ends away from theplaten,

and means on the rook shaft for causing the` rock arms to rock therewith away frommthe platen.

20. In a paper feed mechanisnnthe comi bination of a platen carriage, a platen on the carriage, a plurality of rear feederoll shafts, a plurality of front feed-roll shafts,

feed-rolls on all the shafts, independent pairs of rock arms each supporting one shaft andall pivotally supported on the'carriage at the rear of the platen, said front feed-roll shaft supporting arms havingan upand. down sliding movement on their pivotal normally engaging the under y 1 support and side of the rear feed-roll shaft vsupporting arms, means forv `yieldably pressing they front feed-roll shaft supporting arms lup- Wardly against the rear feed-roll shaft" supf `v i all the porting arms, and meansfor rocking downrear feed-roll shaft supporting arms 21. In a paper feed mechanism, the coinbination of a platencarriage, a platen on the carriage, a rock sha-ft joiiriialled on the carriage, means for rocking said rock shaft, independent arms each having a direct pivotal and up-and-d'own sliding connection with the -rocl shaft, a feed roll supported by` said arms, ymeans for independently pressing` the arms toward the platen, and means on said rock shaft for rocking the arms away from the platen when said shaft is rocked in one direction.

22. in a paper feed mechanism, the coinbination of platen carriage, a platen on the carriage, a rock shaft joiirnalled on the carriage, means for rocking said rock shaft, independent arins each having a direct pivotal and Lip-and-down sliding connection with the rook shaft, ra i'ieed roll supported by the platen about the axis or" the rock shaft When said. shaft is rocked in one direction. This speeilieation lsigned this sixth day of November, A. D. 1918.

FRANK ii. ARMSTRONG.

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