US1453577A - Typewriting machine - Google Patents

Description

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F. H. ARMSTRONG TYPEWRITING MACHINE 3 sheets-sheet 1 Filed Sept. 30, 1918 v wmf,

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ATTORNEYS May l, 1923. 1,453,577

F. H. ARMSTRONG TYPEWRITING MACHINE Filed Sept. 30, 1918 3 Sheets-Sheet 2 ATTORN EY S ay 1, 1923. M535?? F. H. ARMSTRONG TYPEWRITING MACHINE Filed Sent. 30, 1918 "3' Sheets--Sheecl 3 ATTORN EYS Patented ay 1, 1923..

FRANK HUB/BERT ARMSTRONG, F AUBURN, NEW YORK, ASSIGNOR T0 CORONA TYPE- WRITER COMPANY, INC., OF GROTON, NEW YORK, .A CORPORATION 0l? YO TYPEWRITING MACHINE.

Application led September 30, 1918. Serial No. 256,195.

To aZZ whom t may concern Be it known that I, FRANK H. ARMsTRoNG, a citizen of the United States of America, and a resident of Auburn, county of Cayuga, State of New York, have invented certain new and useful Improvements in Typewriting Machines, of which the following 1s a full and clear specification. y

This invention relates to that class of paper-feeding devices in which is employed` a plurality of rolls spring-pressed against a cylindrical platen, means being provided for retracting the rolls downwardly away from the platen to release the paper, and one of the main objects of the present invention is to so construct the feed-roll supporting and actuating devices that they will be capable of being stamped up from sheetmetal, so as to thereby greatly reduce the amount of machine work usually required to properly fit and assemble the parts, as more fully hereinafter set forth. Thisinvention has other important obyects i n View which' will appear in the course of this specilication.

In the drawingsi Fig. 1 is a perspective view of mechanism embodying the preferred forni of my inventi0n,`the platen-roll being omitted from the drawing and one of the platen-supporting members being broken away for the purposes -of better illustration; l

Fig. 2 is a vertical longitudinal sectional View on the line 2-2 of Fig. 3;

Fig. 8 is a plan view of the mechanism as it appears in Fig. 1;

Figs. 4, 5, 6 and 7 are vertical cross-sections on the line 44 of Fig. 3 showing various positions of the feed-rolls with res ect to the platen;

ig. 8 is a cross-section of the platen-carriage showing in detail the manually-operable releasing-cain devices;

Figs. 9, 10,11, 12, 13 and 14 are detail Views of parts hereinafter specifically described. I

Referring tol the y drawings annexed by reference-characters, 15 designates the platen-carriage provided at each end with an upstanding flange 16 in which the ends of the shaft 17 ofthe platen 17 are journaled in the usual manner.

Extending between the end-flanges 16, the full length of the carriage, is a sheet-metal bar 18 which constitutes a rock-shaft by reason of the fact that each of its eXtreme ispbent downwardly to forma longitudinal flange 21 t6 stiffen the rock-bar, andthe front edge of this rock-bar is provided with four forwardly-extending lever-fingers 22, each of which at its extreme forward end is bent downwardly vand then upwardly to form a hook 23 which is open at its upper side. This rockable plate-like shaft 18 may be manually rocked by means of a camlever 24 pivotally mounted on platen-shaft 17 close to tlie inner face of one of the endianges 16 of the carriage, thecam part of this lever being provided with two working faces 25 and 26, adapted to alternately cooperate with the upper edge of an arm 27 formed integral lwith the rock-bar 18 and bent to lit fiatwise against the adjacent end 16 of the carriage so'that its free forward end will lie directly under the two working faces of the cam 24, said arm 27 being normally held up against one or the other of said workin - faces 24 and 25 by a retractile spring 28. hen the arm 27 lies against the cam-face 25, the rockable bar 18 will be in its normal position, i. e., with its upper face horizontal, and the feed-rolls, as hereinafter described, will be in their normal position against the platen or the work-sheet thereon;

but when the cam-lever 24 is turned to swing down the forward end of the arm 27 andy thus bring the other-cam face 26 into locking relation with the upper edge of the arrn 27, the rockable bar 18 will have its forward edge tilted downwardly and thus, -in the manner hereinafter set forth, cause the feedrolls to be retracted from working position.

The feed-rolls 29 are arranged in two sets, one at each side of the mid-length of the platen. Each set consists of a front-shaft 30 and a corresponding rear-shaft 31, each shaft carrying oneor more of the feed-rolls 29, two being shown on each shaft in the present"structure, a loose spacing-sleeve 32 being. arranged between each pair to space them apart. Each of the front-shafts 30 is journaled loosely in upstanding ears 33 formed integral with the forward ends of a pair of dat bars 34, and each of the rearshafts 31 has each of its ends 'ournaled in a pair of upstanding ears 35 formed integrally with the rear end of each of the bars 347 so that each set of rolls forms a substantially rectangular frame consisting of a front-shaft 30, a rear-shaft 31, and the two bars 34 which connect corresponding ends of said shafts. The rear ends of the bars 34 are so located that when the fingers 22 are depressed the lower rounded portions of hooks 23 beardownwardly upon the rear ends of the bars 34 and thus tilt said bars downwardly. ln its preferred form, which is that illustrated, l arrange the bent ends of the lingers 22 so that each will lie between a pair of the ears 35 in such position that the shaft 31-will extend through the hooklile part 23 of the finger, the purpose in turning up the extreme end of the linger to form said hook being to engage the front face of the shaft 31 and thus assist in holdine' the parts is their assembled relation.

o assist in holding the shafts 31 against undue endwise movement in their supporting ears 35, l provide the bar 18 with forwardlyentending fingers 36 which are bent downwardly at their forward ends to lie in axial alinernent with said shafts, a slight distance from the ends of said shafts. ln the present construction, these shafts 31 need only be journaled loosely in the ears 35 so that they willl naturally have a. slight endwise movement in these ears; it is for this reason that l provide said stop-lugs 36. ln this way, .l avoid the necessity of providing the shafts 31 with stop-collars adapted to abut against the ears 35. For the same reason, l provide each of the forward ends of the-bars 34.with an upstanding stop-lug 37 in position to -restrict the endwise movement of the frontv of the dat bars 88 has a pivotal support about midway its length upon a plate 39, which plate is rochably supported at its ends by a pair of laterally-extending arms 40, each of these arms being provided with an integral pivot 41 whose axes are in transverse alinernent with each other, said pivots being journaled in upstanding ears 42 struck up from the platen-carriage. rlhe two roclrin plates 39 are normally pressed up towar nascere the platen surface by means of a spring 43 which connects a pair of upstanding arms 44 attached integrally to the pivot-ends of the arms 40, so that said spring constantly tends to rock the bell-cranks formed by the arms 40-44 in a direction to raise the supporting plate 39. lt will thus be seen that when the rock-shaft 18 is tilted to have its upper face in horizontal position', the fingers 22 will be in their raised position and the two roller-sets will be free to be pressed up against the platen through the medium of the bars 38 and their spring-actuated connections; and that when said bar 18 is tilted in the manner heretofore described the downwardly-bent ends ofthe finger-S22 will strike against the rear ends of all the bars 34 and first swing them downwardly far enough to retract the rear feed-rolls 29 but still leave the front feed-rolls in working position. ln this initial action the bars 38 pivot on the front-roll-shafts 30 and are depressed bodily against the action of spring 43. A further depression of the fingers 22 will swing the bars bodily downward about the axis of the rock-shaft 18 against the action of spring 43 (and thus bring about a corresponding depression of the forward ends of the bars 34) by the following means: Several (preferably 4) of the @ars 35 are each extended upwardly and rearwardly to a point above the upper flat surface of the rock-bar 18. thus forming hook-like levers 45. rl`he initial tilting of the rock-bar 18 and the bars 34 brings the rear extremities of the levers 45 into contact with said rock-bar 18 so that after the rear feed-rolls have been retracted from the platen these levers 45 interlock with the rock-bar 18 in the manner of a knuckle-joint and thereby cause the further tilting of the rock-bar 18 to carry down with it the forwardvends of the, bars 34, as shown in Fig. 7, in which position the spring 43 is extended to maximum and the rocking supportingplates 39 are pressed down fiatwise against the upper suriace of the platen-carriage 15. n

rl`he parts are locked in this off position by means of the cam-face 26 of the cam-lever hereinbefore described; and when the handleend of the cam-lever is drawn rearwardly, as shown in full lines in Fig. 8, to bring the other cam-face 25 into action, the spring 28 will draw the rock-bar 18 to normal position and thus permit spring 43 to restore all the feed-rolls to working position.

The upstanding arms 44 of the bell-cranks are desirably each provided with a series of two or more notches 46 to enable the spring 43 to be connected thereto farther from or nearer to the pivots 4l, to thereby vary the leverage exerted by the spring. The bearings 42 for the pivots 41 are desirably stamped up from the body of the platen-carriage, as

shown particularly in Fig. 14. The manner of connecting the supporting-plate 39 to fltle lll) pressure-bar 38 may be greatly varied withlout departing from my linvention, but, for

the plate 39, to thereby form virtually al pivotal lockingv connection between the bar 38 and said plate 39. For the purpose of providing thel pressure-bar 38 with a broad bearing upon the rocking-bar 39, said bar is elongated transversely of the platen-carriage (at 49) and the hooks 48 are arranged at the extremities of said transverse extension or enlargement, this enlargement forming virtually a bar lying in the same horizontal plane with the main part of the bar 38 and at right angles thereto. This bar-like enlargement 49 is formed integral with the -bar 38, and the hooks 48 at the ends of this enlargement are formed integrally therewith by simply bending down the hook-like ends of the bar. For compactness, it is desirable that when the feed-rolls are thrown downwardly to released position,V the rockingplate 39 will lie directly against or near to the upper surface of the platen-carriage, as shown in Figs. 6` and 7, and, in order that the depending hooks 48 will not interfere with this action, the platen-carriage plate is provided withholes 50 to permit the hooks to pass down through the platen-carriage plate.

It will be' observed that the two extremities of each of the bars 38 are bent downwardly to vpass under the bars'34 and that at polnts coincident with these bent-down ends the platen-carriage is' provlded wlth holes y51 to permit these bent ends to pass down through the top-plate `of the platencarriage when the bars 38 are depressedto their lowermost position; in this way, oompactness in my device v is further provided for. f

The sheet-metal paperide an .52 is provided at its forward e ge wit depending ears 53 which are rigidly fastened to the rear face of the' scale-bar 54. The paper,- guide is provided at intervals with on itudinal slots 55 through which the feed-ro ls extend, and, for the purpose of ensuring a positive movement up and down of theV uide in unison ,with the feed-rolls, I rovi e the guide at' each end with a depen ing ear 56 for enga ement with the adjacent front feedroll sha 30, said ear being provided with a 'hole vthrough which the shaft extends.

It will be observed thatv the hooks 23 fit loosely between the upstanding ears 35 and that the upwardly-extendin extreme ends of these lugs are each tapere upwardly; the

object of this is" to avoid clamping against' the inside faces ofthe two upturned lugs and yet maintain a locking relation between the feed-roll-frames and the rock-shaftV ,whereby the roll-frameswill have great freedom in independently adjusting themselves to the work on the platen. It will be observed also that the space between the shaft 3l and the upper face of the bar 34 is greater than the thicknessy of the hook 23, thereby providin for a. certain degree of play or lost motlon in the connections between the frames and the hooks 23; the'object of this is to permit the rear feed-roll-shafts to adjustl themselves to inequalities of platen and paper without resistance from the rock-shaft and also to permit endwise tilting of the frames' and bars 38 on plates 39 as well as straight up and down movements of the frames and bars 38 against the pressure of plates 39.

It will be observed further that the mannerv of connecting the vforward .feed-rollshafts to the rear feed-roll-shafts and the rear feed-roll-shafts to the rock-shaft holds all the parts securely' in position and 4yet permits a high degree lof torsion-like actlon of the parts to thereby compensate for inequalities of platen or paper.

It will be observed further that my manner of connecting the parts of the feed-rollfran'ies together andv locking them to the rook-shaft avoids the use of rivets and screws or other machined parts and at the same time provides a construction whose parts are so interlocked that the omission of any one art in the particular construction shown wou d destroy the functions of all the other parts, since the shafts of the rolls not only support the usual feed-rolls but also lock the feed-roll-frames to the' releasingv rock-shaft at the rear. It will beobserved further that the employment of the type of hook shown I pactible typewriters, such, for instance, as thegCoronfn in which the space between the laten-roll and the top-face of the carriage 1s 'so limited that it is dflcult to arrange an efficient feed-'roll-release or cast-oil mechanism in` said space. .I have designed the preferred form of my mechanism with a view of locating the cast-0R devices at the rear ofthe j-platen and partly in the bite formed between the rear-face of the platen and the top-face of the carriage, none yof the parts of this cast-od' mechanism being extended into the space between the center of the platen-roll and the carriage-top. ln the structure l have illustrated herein, as well as in the several modifications thereof l have disclosed in copending applications, this cast-off or releaslng mechanism is so constructed and arranged that it operates by engagement with Ythe rear-edge or part ofj the feed-roll-frame, that is, the part which projects into the bite between the carriage vand the platemthe preferred construction embodying a rock-shaft adapted to be rocked forwardly to first depress the rear feed-roll-shaft and then pry or leverage down the front feed-roll-shaft, a sort of knuckle or Erule joint connection being provided between the feed-roll-frame and the rock-shaft to bring about this successive retraction of the rear feed-rolls and the front feed-rolls. ln this way, as stated, l avoid locating any of the roll cast-Cif devices underneath the platen, so that l am enabled to select from a wide range of constructions an efficientvmechanism, not being restricted in the selection of the mechanism to such as would be required if the cast-off devices had to be located in the very narrow space between 'the platen and the carriage.

' rlhe nature and scope of the invention having been thus indicated and its preferred embodiment having been specifically described, what is claimed as new is:

1. ln a paper feed mechanism, the combination of a platen support, a platen on said support, front and rear feed-roll shafts, transverse members supporting said shafts, manually rockable means adjacent the rear feed-roll shaft and having an'up-and-down sliding connectionv ywith said shaft and adapted t0 engage and depress the rear ends of said members when rocked in one direction, means for locking the members to said rockable means to rock as a unit therewith after a preliminary depression of the rear ends of the members, and yieldable means connected with said members for normally holding the feed rolls against the platen.

- 2. ln a paper feed mechanism, the combination of a platen support, a platen on said support, front and rear feed-roll shafts, transverse members supporting said shafts, manually roclrable means adjacent the rear feed-roll shaftv and having anup-and-down lsliding connection with said shaft and adapted to engage and depress the rear ends of said members when rocked in one direction, means for locking the members to said rockable means to rock as a unit therewith after' a 'preliminary depression of the rear ends of the members, and a yieldable su port upon which said members are rochabl mounted.

. of said feed-roll shafts when sai maaar? 3. ln a typewriting machine, a sheet-metal rock-shaft pivotally supported at the rear of the platen and adapted to havefits front edgetilted downwardly, a-paper feed-roll frame and means whereby the tilting of said shaft moves said feed-roll frame away from the platen.

4. ln a typewritin'g machine, a rockable sheet-metal bar or plate arranged at the rear of the platen provided with forwardly-extending integral fingers, and a movable feedroll frame adapted to be depressed by said fingers.

5. ln a paper feed mechanism7 the combination of a platen, a support for the platen, tandem feed-roll shafts, feed rolls on said shafts, tiltable supporting means for the shafts spring-urged toward the platen, a manually rockable part provided with upwardly facing hook-like members through which the rear feed-roll shaft extends and adapted to exert downward pressure on the shaft-supporting means adjacent the rear shaft 'to tilt said means, and upstandingV members on said. shaft-supporting means normally spaced from said roclrable part and adapted to be engaged thereby to lock the shaft-supporting means to rock with said part after an initial tilting of said means by said hook-like members.

6. ln a typewriting machine, a platencarriage having upright end danges, a sheetmetal rockable plate or bar extending between said anges and having integral ears at its ends, pivots connecting said ears to said end flanges, means for rocking said plate-like shaft, feed-rolls, and means whereby the rocking of the shaft releases the feed-rolls.

7. ln a paper feed mechanism, the combination of a platen, a support for the platen, tandem feed-roll shafts, feed rolls on said shafts, bars extending transversely 0f the platen in which said shafts are journaled, a. spring-pressed member extending longitudinally of the platen and loosely engaging under said bars intermediate the feed-roll shafts, and manually` rockable means coacting with said bars ad'acent one dmeans is rocked in one direction for first swinging the bars about the other feed-roll shaft and then swinging the bars bodily with said rockable means and continuously forcing said spring-pressed member away from the platen.

8. ln a typewriting machine, the combination of a platen-carriage, a platen rotatably mounted on the carriage, a pair of paper-feed-rolls spaced apart circumferentially of theplaten, means for rotatably sup' por-tin the rolls in spa/ced relation, springpresse means on t e carriage normally forcing said roll-supporting means toward the platen, a roch-shaft journalled on 'the Lasse?? carriage, and means connecting the rockshaft to the roll-supporting means for swinging the supporting means first about an axis coincident with the axis of one feedroll and then about the axis of the rock-shaft againstl the pressure of the spring-pressed means. I

9. In a typewriting machine of the class set forth, a platen-carriage, a. roller platen on the carriage, a rock-shaft journaled on the carria arranged at the rear of the platen an provided with a plurality of forwardly-extending hooks, a frame lying/ under the platen, a set of front andV rear feed-rolls carried by the frame, and means for moving said frame toward the platen, the shaft of the rear feed-rolls engaging in said hooks.

10. yIn a'typewriting machine of the class set forth, a rock-shaft at the rear of the platen provided with two pairs of forwardly-extending hooks, two sets of feed-rollers each embodying afront-shaft and a rearshaft and transwisely-extending connecting bars, said bars and shafts forming a frame,-

and each of said rear-shafts engaging in a pair of said hooks, for the purpose herein set forth. y

11. In a typewriting machine of the class set forth, a rock-shaft at the rear of the 1pllaten provided with downwardly -bent ooks opening upwardly, a normally pressed-up feed-roll frame adapted to be tilted downwardly at its .rear edge by said hooks when said rock-shaft is rocked forwardly, and a rear feed-roll shaft carrying feed-rolls and engaging in saidhooks, for the purpose set forth.

12. In a typewriting machine of the class set forth, a sheet-metal rock-shaft extending the length of the platen and having an integral forwardly-extending arm lying flatwise against one end of the platen-frame, a lever for rocking the rock-shaft pivoted adjacent to the aforesaid arm andv adapted to contact therewith to rock the rock-shaft, a spring for holding the rock-shaft and its arm in normal position against said lever, and means whereby when said rock-shaft is rocked the paper-feed devices are released.

13. In 'a typewriting machine of the class .set forth, a platen-carriage, a roller platen on the carriage, a set of feed-rolls embodying a rear-shaft and feed-rolls and a frame in which said shaft is journaled to have an endwise play, and a rock-shaft jonrnaled on.-

the carriage at the rear of the platen and provided with a forwardly-extending finger or ear adapted to arrest endwise movement of said feed-roll shaft.

14.' In a typewriting machine of the class set forth` two sets of feed-rolls and a vertically-movable frame for each, each frame embodying a rear feed-roll shaft having any endwise play in said frame, and a rook- ,shaft for releasing said feed-rolls from the ving apertured ears adjacent each end of the bars and front and rear feed-roll shafts jonrna-lled in the apertured ears on each pair of bars and removable endwise, feedrolls on said shafts, a manually rockable device cooperatin with the end bars to shift the feed-rol s away from the'platen and separablyinterlocked with ,the feedroll frames through the medium of the rear feed-roll shaftsI` bendable parts on said rockable device for holding the rear feed-rollshafts against withdrawal from their bearing ears, and bendable parts on the end bars for holding the front feed roll shafts against Withdrawal from their bearing ears.

16. In a typewriting machine, the combination of a platen-carriage, a roller platen on the carriage, a feed-roll-frame embodying bars extending transverselyunder the platen and front and rear feed-roll-shafts supported on said bars, feed-rolls on the rollshafts, and a roll-cast-off rock-shaft provided with rock-arms coacting with `said bars to cast-olf the feed-rolls, said rock-arms being interlocked with the rear ends of the bars to preventI undue endwise movement of the feed-roll-frame and having a ivoted connection with the rear vfeed-ro -shaft adapted to permit vertical movement of the feed-roll-shaft relatively to said arms when the cast-off rock-shaft is in normal position.

17. In a paper feed mechanism, the combination of a platen, a pair of tandem feedroll shafts, feed-Nfl: on said shafts, end members extending, transversely of the platen in which said shafts are journalled, manually rockable means for shifting said shafts and members away from the platen interlocked with said end members and the rear feed-roll shaft to permit up-and-down movement of the shafts and vmembers independently of said rockable means and restrain movement thereof longitudinally and transversely of the platen, and means for vieldably urging said members and .shafts toward the platen. v

18. In a paper feed mechanism, the combination of a platen carriage, a platen supported in the carriage, a feed-roll frame, front and rear feed rolls on the frame, yieldable means urging the frame toward the platen, a rock-shaft having a flat face 'ournalled on the carriageat the rear o the frame, means for rocking said shaft, forwardly extending ,arms carried by Said shaft adapted'to press downwardly on the frame adjacent the rear feed-roll and depress the rear part of the frame when said shaft is rocked in one direction, and arms on the rear of the frame normally spaced from the flat face of the rock-shaft and adapted to be engaged by said fiat face upon further rocking of the shaft in the same direction to lower the forward part of the frame.

19. ln a typewriting machine Aof the class set forth, a rear rock-shaft journaled beyond the rear side of the platen, a"til'table frame embodying front and rear feed-rolls located between the platen and its bed-plate, and means whereby the rocking of said shaft will first tilt the rear rolls away from the platen and subsequently Atilt the front rolls away from the platen, said means embodying devices carried by the rock-shaft and adapted to engage the rear edge of said frame and devicesl carried by said frame adapted to engage the rock-shaft to impart the final tilting movement.

20. 1n a paper feed mechanism, the combination of a platen, members extending transversely. of the platen` front and rear feed-roll shafts supported'by said members, feed rolls on the shafts, a rock shaft, rock arms on said shaft having depending U- shaped forward end portions embracing the rear feed roll shaft and overhanging the rear ends of the transverse members, means for rocking said shaft to depress the rear ends of the transverse members through the medium of said rock-arms, and means on said transverse members adapted to engage over the rock shaft after depression of the rear ends of the members to cause the members and rock shaft to swing as a unit about the axis of oscillation of the rock shaft, and spring-urged means loosely engaging undersaid transverse members intermediate the feed-roll shafts.

21. In a typewrit-ing machine. the combination of a platen-carrage` a roller platen on the carriage. a feed-roll-frame under the platen, yieldable means on the carriage for normally pressing the frame toward the platen, front and rear feed-trolls on the frame, and rockahle cast-off means on the carriage adapted when rocked in one direction to vfirst engage and depress the rear part of the frameand subsequentlyv also engage the frame at a different point to cause the frame to rock bodily with said rockable meansduring a further movement of said means in the same direction.

22. ln a type writing machine of the class set forth, a platen-carriage, a roller platen on the carriage, two feed-roll frames, each embodying a front-shaft carrying a feed roll and a rear-shaft carrying a. feed-roll, means on the 'carriage for normally pressing said frames toward the platen, and means for forcibly pressing said frames with nasse?? their rolls away from the platen, said means embodying a rock-shaft journalled on the carriage carrying fingers which engage the rear edoes of each of the frames at its opposite ends so as to tilt the rear edges of the frames downwardly, and .means cooperating between the frame and the rock-shaft for subsequently forcing the front edges of the frames away from the platen.

lin a typewriting machine of the class set forth, a platen-carriage, a platen rotatably mounted on the carriage, a feed-roll frame embodying a pair of transverse bars and roll-shafts connecting the ends thereof, a longitudinal bar extending underneath said transverse bars, a supporting device mounted on the carriage underneath the center of said longitudinal bar, and means for normally pressing said supporting device toward the platen, the ends of said longitudinal bar having a rockable, connection with the transverse bars and its center having a connection with said supporting device rockable on a transverse axis.

24. In a typewriting machine of the class set forth, a platencarriage, a platen rotatably mounted on the carriage, a feed-roll frame embodying a pair of transverse bars and roll-shafts connecting the ends thereof, a longitudinal bar extending underneath said transverse bars, a supporting device mounted on the carriage underneath the center of said longitudinal bar, and means for normally pressing said supporting device toward the platen, said transverse bars. and said longitudinal bar being flat and having a loose fiatwise bearing upon each other, for the purpose set forth.

25. In a typewriting machine of the class set forth, a platen-carriage, a roller platen on the carriage. a feed-roll frame embodyingl feed-rolls and a pair of transverse flat bars provided with bearings for the shafts of said feed-rolls` a longitudinal fiat bar arranged between the bas-e of the platen carriage Aand said fiat baies and having its ends engaging Hatwise against the under side of said transverse bars, and means for normally pressing said longitudinal bar toward the platen.

26, lln a type-writing machine of the class set forth, a platen-carriage, a roller platen on the carriage, a feed-roll frame embodying feed-rolls and a pair of transverse flat bars provided with bearings for the shafts of said feed-rolls` a longitudinal flat bar arl ranged between the base of the platen carriage and said flat bars and having its ends engaging Hatwise against the under side of said transverse bars. and means for normally pressing said longitudinal bar toward the platen, said means embodyinga fiat plate arranged transversely of the platen and adapted to support the longitudinal bar approximately at its mid-length, and spring means normally tending to press said flat plate toward the platen, whereby when the feed-rolls are moved to released position said bar and said plate lie flatwise against the top-face of the platen-carriage.

27. ln a typewriting machine of the class set forth, a platen-carriage, a roller platen on the carriage. a feed-roll frame embodying front and rear shafts carrying the feedrolls, transverse bars provided with journals at their ends for the ends of said feed-rollshafts. a longitudinal 'bar engaging Said transverse bars, and means fornormally pressing said longitudinal bar toward the platen to thereby normally tend to force the feed-rolls into feeding position, said means embodying a rockable plate mounted on the carriage underneath said longitudinal bar provided with an Opening. said longitudinal bar being provided with laterally-extending hooks extending down through said opening to therebv lock the plate to the bar but permit limited independent rocking motion of the bar and the plate.

2R, ln a typewriting machine of the class ret forth. a platen-carriage, a roller platen on the carriage. a pair of feed-roll frames each embodying a feed-roll-shaft and a pair of transverse bars supporting the ends of said shafts. means for independently pressing said frames toward the platen embodying a sheet-metal longitudinal bar arranged underneath each frame and adapted to have its ends engage under said transverse bars, a sheet-metal roekable supporting plate mounted on the carriage under the center of each longitudinal bar and having a loose rocking connection therewith. and means for normally swinging said supporting and rocking plates toward the platen. said longitudinal bars and said rocking plates being arranged flatwise with reference to each other so as to lie closely adjacent to cach other and the base of the platen-carriage when the feed-rolls are moved to released position.

Q9. ln a typewriting machine. a platencarriage. a platen on the carriage, a paperfeed mechanism embodying two separate frames each having a front feed-roll-s-haft carrying a pair of feed-rolls, a paper-guide having two depending ears adjacent opposite ends thereof each pivotally connected to the outer end of one of said shafts. and means for depressing said shafts to take the rolls and guide away from the platen.

30. In a tvpewriting machine, a platencarriage and a shaft mounted therein'cirrying a platen. a paper-feed-roll arrangement embodying a rock-shaft. this rock-shaft being provided with an arm, and a cam-lever for rocking said shaft through the medium of said arm, said' cam-lever having its bearing on said platen-shaft.

31,1n a typewriting machine, a vrockshaft journaled in the platen-carriage, a feed-roll-frame having -a feed-roll shaft at its rear edge supported entirely by the frame andhingedly engaging said rockshaft, said rock-shaft being provided With a lug which servesto lock said feed-roll shaft to said feed-roll-frame and the rockshaft.

` 32. In a typewriting machine. a paperfeed-frame having transverse bars provided at their rear-ends each' with two upturned lugs having alined shaft-holes and each being also provided with upsta'nding integral lugs at their forward ends also provided with shaft-holes, feed-roll-sha'ftsl journaled in the holes in said lugs, means independent of the rear feed-roll-shafts for preventing undue endwise movement of the rear-shafts, and upstanding lugs on the forward ends of the transverse bars for preventing undue endwise movementof the front-shafts.

33. In a typewriting machine. a paperfeed-roll vmechanism embodying a rockshaft having at one end a forwardly-projet-ting integral arm curved laterally between its free end and its connection to said rock-shaft. a feed-roll-frame connected to said rock-shaft and having a rear feed-rollshaft slidable endwisely out of its bearing, this shaft being in alinement with the curved part of said arm so that'said shaft may be drawn out endwisely Without striking against said lever.

34. ln a typewriting machine. the combination of a platen-carriage, a platen on the carriage. a feed-roll-frame, tandem feedrolls on the frame, and means mounted on the platen-carriage yieldably pressing the frame toward the platen. said means embodying-a bar arranged longitudinally with respect to the platen and bearing against said frame at its ends. a member on the carriage rockable about an axis extending transversely of the carriage, said bar being mounted on said member mtermedlate the ends of the bar to rock about an axis ex-` tending transversely of the carriage, and spring means for rocking said member toward the platen.

ln `a typewriting machine, a platencarriage, a platen on the carriage, front and rear paper-feed-rolls. a frame supporting the rolls including transverse bars, a longitudinal bar having its ends pressing upwardly against the under side of said transand may' also tilt both sidewise and endwise with respect to the platen while in action.

36. ln a typewriting machine, a platencarriage, a platen. on the carriage,'a feedroll-carryiifig-frame,l tandem feed-rolls in the frame, a longitudinal bar arranged between the platen and the base of theJ platencarriage for pressing said trame toward the platen, said bar beingr enlarged laterally at a point approximately midway its length and provided at the ends of said enlargement with depending hooks, a rocking member mounted on the platen-carriage and provided with an opening for the reception of said hooks to thereby rockingly connect this member with said longitudinal bar, and spring means for normally pressing the rocking member upwardly toward the platen.

37. ln a typewriting machine, a platencarriage, a platen on the carriage, a feedroll-carrying-frame, tandem feed-rolls 1n the trame, a longitudinal bar arranged between the platen and the base of the platencarriage for pressing said frame toward the platen, said bar being enlarged laterally at a point approximately midway its length and provided at the ends ot said enlargement with depending hooks, a rocking member mounted on the platen-carriage and provided with an opening for the reception of said hooks to thereby rockingly connect this member with said longitudinal bar, and spring means for normally pressing the rocking member upwardly toward the platen,vsaid longitudinal bar being dat in cross-section and said rocking member being likewise rlat in cross-section, whereby said bar and said `rocking member may lie close against the base ot the platen-carriage when they are. depressed to release the rolls.

38. ln a typewriting machine, a platencarriage, a platen on the carriage, a pair ot feed-roll-frames arranged end to end on the carriage, means for positively forcing the frames away from the platen, and collapsible spring-urged means for resiliently pressing said frames toward the platen pivotally mounted on the platen-carriage and adapted to lie flat against the said trames when the frames arey forced away from the platen.

39. ln a paper feed mechanism, the combination ot a platen carriage, a platen thereon, a pair ot feed-roll frames arranged end to end along the platen, tandeni feed `rolls in each frame, a pair ot rockable members pivotallyv held to the carriage to roclr toward and from the platen about axes eX- tending transversely of the platen, a single spring connected at its opposite ends with said rockable members and normally urg- Leader? ing the members toward the platen, and a pair ot pressure-distributers roel-:ably mounted intermediate their ends on said rockable members and each extending longitudinally of a diderent frame and pressing there-against substantially midway between the tanden feed rolls in the frame.

40. In a typewriting machine, a platencarriage, a platen on the carriage, a feedroll-frame and means for depressing it awa fromA the platen embodying a rock-shall journaled on the carriage made ont sheetmetal and having a lat top-plate yand a rear depending plate, and means for normally pressing the teed-roll-frame toward the platen embodying a coil-spring arranged longitudinally of the platen and housed in the angle formed by the plates forming the rock-shaft.

41. ln a paper feed mechanism, the combination of a platen carriage, a platen thereon, a plurality of feed-roll trames, tandem feed-rolls in the trames, a plurality ot spring-urged devices mounted on the carriage and normally urged toward the platen, and members ulcrumed on said devices and each supporting a different one ot said frames to tilt therewith an ay from the platen at two opposite sides ot the frame and to tilt relatively to said member to permit either of the other two sides of the trame to move away from the platen.

42. ln aV paper feed mechanism, the combination of a platen carriage, a platen thereon, a plurality of leed-roll trames, tandem feed-rolls in the trames, a plurality oit spring-urged devices mounted on the carriage and normally urged vtoward the platen, members tulcrumed on said devices and each supporting a different one of said frames to tilt therewith away from the platen at two opposite sides ot" the frame and to tilt relatively to said member to permit either of the other two sides of the trarne to move away from the platen, and a single spring urging all of said devices toward the platen.

43. lln a paper feed mechanism, the combination of a platen carriage, a platen on the carriage, a spring-urged device mounted on the carriage and normally forced toward the platen, a tiltable member pivoted on said device intermediate its ends, a feedroll frame, and tandem feed-rolls inthe trame, said frame being supported bn said tiltable member to rock thereon about an axis extending transvermly of the pivotal axis of the tiltable member.

rl`his specification signed this sixteenth day of September, A.. D., 1918.

realm ramener aensraone.

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