US1453578A - Typewriting machine - Google Patents

Description

May 1, 1923.

F. H. ARMSTRONG TYPEWRITING MACHINE Filed Nov. 9, 1918 2 Sheets-Sheet 1 Patented May 1, 1923.

UNITED STATES PATENT Of'FliI l.

lil'ztliltllll H. ARMYS'JFRONG, Ull? AUBURN. NEW YCKRK. ASSIGNOR TU CURO'Nilr tfYiPEW'EYILTER TYPEWRIJPING': lYIIACI'IINE.

Application filed November To (all to 7mm it may concern:

Be :it lrnown that I, Fnanr: H. Antrs'rnono. 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 Typewrit ing lifachines. of which the following is a full and clear specification.

This invention has relation to that type of papenfeeding devices covered in my copending application Serial No. 256,195, filed September 2-30, 1918 and the object of the present iinliirovements is to provide a simple and easily-manufactured mechanism for nor mally pressing the two paper-feed-frames toward the platen, as more fully hereinafter set forth.

in the drawings l ig. 1 is a perspective view of the platen carriage provided with my invention the platernroller and the end-flanges being omitted Fig. 2 is a perspective view of the platencarriage with the paper-feed-roll-frames removed;

Fig. 3 is a vertical transverse sectional 'view showing the 'leedroll-frame in working peisiitioin this section being indicated by the dotted line 2%3 in Fig. 6 as well as in Fig. 1;

Fig. 4 is a partial longitudinal section edmwingthe feed-roll-frame in the same position as in Fig. 3;

Fig. 5 is a vertical transverse section on the line 5-5 of Figs. 1 and 6, the platen-roll being partly broken away;

Fig 6 is a partial longitudinal section showing the feed-rolhframe in a position corresponding to that in Fig. 5;

i i' and S are detail perspective views showing modifications of the rockable pressure members.

Referring to the drawings annexed by reference-characters, designates the platenci'irriage provided at each end with an up standing flange 16 in which the ends of the shaft 17 of the platen 1'? are journaled in the usual manner.

lilrtending between the end-flanges 16. the full length of the carriage, is a sheet-metal 9, 1918. Serial 1T0. 261,2550.

bar .18 which constitutes virtually a rockshaft by reason of the fact that each of its extreme ends is bent downwardly to form an car 19, which car is pivotally supported. on screw-pivot 20 threaded from the out side inwardly through the e iii-flange 16, the bar being rockable upon these pivots 20. This bar is located behind the platen and at a point about on a horizontal level with the under face of the platen. The rear edge of the bar is bent downwardly to form a longitudinal flange 21 to stiffen the rock-bar. and the front edge of this rock-bar is provided with four forwardlvextending leverlingers 22, each. of which at its extreme for ward end is bent downwardly and then up wardly to form a hook 23 which is open at its upper side. This rockable plate-lilre shaft 18 may be manually rocked by means of a cam-lever 2 lpivotally mounted on platenshaft 17 close to the inner face of one of the end-flanges 16 of the carriage, the cam part of this lever being provided with two working faces and 26, adapted to alter nately cooperate with the upper edge of an arm 27 formed integral with the rock-bar 1S and bent to fit 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 2" being normally held up against one or the other of said working-faces 24: and 25 by a retractile spring 28. When the arm 2? 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 worksheet thereon; but when the cam-lever 24. is turned to swing down the forward end of the arm 27 and thus bring the other canrface 26 into locking relation with the upper edge of the arm 27, the rockable bar 18 will have its forward edge tilted downwardly) and thus, in the manner hereinafter set forth, cause the feed-rolls 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 one or more of the feed-rolls 29, two being shown on each shaft in the present structure, a loose spacing-sleeve 32 being arranged between the front pair to space them apart. Each of the front-shafts 30 is journaled loosely in upstanding cars 33 formed integral with the forward ends of a pair of flat bars 34, and each of the rear-shafts 31 has each of its ends journaled in a pair of upstanding ears 35 formed integrally with the rear end of each of the bars 84, so that each set of rolls forms a substantially rectangular frame consisting of a front-shaft 80, a rear-shaft 31, and the two bars 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 the hooks 23 on the forward ends of the fingers bear downwardly upon the rear ends of the bars 34 and thus tilt said bars downwardly. In its preferred form, which is that illustrated, I arrange the bent ends of the fingers 22 so that each will lie between a pair of the ears 35 in such position that the shaft 31 will extend through the hook-like part 23 of the finger, the purpose in turning up the extreme end of the finger to form said hook being to engage the front face of the shaft 31 and thus assist in holding the parts in their assembled relation.

To assist in holding the shafts 31 against undue endwise movement in their supporting ears 35, I provide the bar 18 with forwardly-extending lingers 36 which are bent downwardly at their forwari'l ends to lie in axial alinement with said shafts, a slight distance from the ends of said shafts. In

the present construction. these shafts 31 need only be journaled. loosely in the ears so that they will naturally have a slight endwise movement in these ears; it is for this eason that I provide said stop-lugs In this way. I avoid the necessity of providing the shafts 31 with stop-collars adapted to abut against the ears to. For the some reason. I provide each of the forward ends of the bars 34; with an upstanding stop-lug 3? in position to restrict the endwise movement of the front-shafts 30. The foregoing parts are constructed and arrangei'l substantially as in my aforesaid copeudiny; applicat on.

Each of the rectangular frames. of which the parts 3% for the end-bars. is supported in the followin-r manner: pivotally hung upon the rear-: ia'l't 31, at a point between the rolls is an ei'pializing bar 33 whose forward end pres es flatwise upwardly against the sleeve 12 on the innit-shaft. the rear end of said bar 38 be ng widened and being; }.)l()\*i(l8ti with upstai'idiug cars 39 which form the co nection with said shaft 31, these ears serving also as stops to space the rolls 29. This bar 38 rests upon a lateral finger 40 formed integral with a rockable yoke 41 supported on the upper face of the platen carriage. The front end of this lockable yoke member is pivotally connected to the platen-carriage by an integral pivot 42 which is contined in a closed our 423 struck up from the platen-carriage, while the rear pivot 42 of this rockahle yoke has a bearing in the crotch formed by the car 43 formed intergrul with the platen-carriagc top. this ear 43 inclining upwardly and laterally toward the adjacent end of the carriage. The pivots 42 are held in the crotch formed by ear +14% by means of a coil-spring 43 .Ylliali connects the rockable yokes 41 at. the opposite sides of the center of the carrizqre-frarne. the connection to the yoke members ill beinp through the medium of up standing arms 44. The action of the spring 43 is to consantly tend to swing the yokemembers 41 iunvardly, so that their fingers to constantly press upwardly against the ba "s 38 and thus normally press the feedrcil-frinnes tmvard the platen. The employment of open pivot-receiving eyes at the rear ends of the yoke-members is advantageous in that niamifacture and assembly of the parts is facilitated. The yoke-members are. tilltlll. held in said open eyes 43' by means c! the spring 4 3. and lateral shifting of the yoke-members is prevented by locating (he upstanding arms H a? a point on the yokenacmbers where they will abut against the front edges of the ears l3 and thus act as stops to prevent dislocation of the yokemembers. It will thus be seen that when the rock-shaft 18 is rocked 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 bins 3S and their springmctuated connections; and that when said bar 18 is rocked by swinging arm 2' downwardly in the manner heretofore described the downv:ardly-bent ends of the fingers .22 will strike against the rear ends of all the bars 34 and first swing: them about the front feed-roll shafts tit) far enough to retract the rear feed-rolls 29 but still leave the front feedrolls in working position. During this initial action the rear ends of the bars 38 are swung downwardly and partially depress the swinging yokes -l-l against the tension of spring 43. A further depression of the tin gers 22 will swing the bars 34 and 38 downward about the axis of the rock-shaft i against the tension of spring 43 (and thurbring: abou a depression of the forward ends of the bars 34- and 38 and the front feed-roll shafts till so as to cast off the from feed-rol 2 by the following means: Several (preferably 4.) of the ears 35 am each ci-l'in-i'ltil upwardly and rearwardly to :1

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sesame point above the upper flat surface of the rock-bar 18, thus forming hook-like arms 15. The initial tilting of the roclobar 18 and the bars 34: brings the rear extremities of the arms into contact with said rook-bar l8 so that after the rear teed-rolls have been retracted from the platen these arms 415 in terlock with the rock-bar ill in the manner 01'' a knuchlegioint and thereby cause the further tilting); of the roclebar 1.8 to carry down. with it the forward ends of the bars 34:, as shown in Fig. 5 (and as fully set forth in my aforesaid copending application), in which position the spring 13 is iitended to maximum and the rocking supperting-plates 41 are pressed down flatwise against the upper surface of the platen-carriage l5. lhe bars 38 swing about the axis of rock-shalt 18 in unison with the bars 234i during; the final 0 st-oli movement of the rocloshatt, just described, owing; to the connection of these bars 258 with the rear toad-roll Sl'lt ftand the pressure of the 1" ont 'l eeitroll shatts on the forward ends oi; these bars during the downward swinging movement oi? bars 34 and the front ileedroll shafts about the axis of the rock-shalt. The :lront :leedrolls are thus cast oil against the tension pring 43 subsequently to the casting oil oi. the rear teed-rolls, the swinging n'ioveinent oi bars 38- about the axis oi: the roi'leshalft serving to lower the forward ends oi said bars and complete the depression oil? yolies ll to a sub stantially horizontal position. The parts are locked in this oil position by means of the cam-face 26 oil? the cam-lever hereinbeiore described; and when the handleend ot the cam-lever is moved rearwardlv, as shown in full lines in Fig. 3, to brinethe other ca1nface 25 into action, the springQPi will draw the rock-bar 18 to normal position and thus permit spring 43 to restore all the teed-rolls to working position.

To facilitate the rocking}; oi the bars lt? on the fingers d0, the upper face of these lingers are converted. lln the modification shown in F 8, the arm 44: is formed on the outer corner of the yoke-member ll, where it will not serve as stop-member but will increase the leverage exerted by the spring 43 because of its location at point farther from the pivotalpoint oi? the yokemember; and a special stop-lug); 14- is employed in this structure. lln Fig. 7, there shown a lateral car 452 which is companion to the flat ear ll and which assists said ear 4:2 in forming a stop to im 'iiuge against ear 413' to limit the upward swing: of the yoke. It will he observed that the levei tingers 4L5 are capable of being bent upwardly and downwardly with respect to the upper o l the rock-shaft 18; this permits a nice individual adjustment of these fin ers to he made so that alter the parts are ac -ii- -iilileil an adjustment of these parts may be made such as will ensure all the fingers acting in unison.

The nature and scope oil? the invention having been thus indicated and its preferred embodiment having been specifically descril'ied, what is claimed as new is:

i. in a ty Ji-nvritinn' machine, a platen carriu rge, a platen on the carriage, a :leed-roll- :trame on the carriage ha ring;- trout and rear teed-roll shafts, teed rolls on said shafts, means tor torci up the trains do wn ward l v aw ay from the platen, and means for resiliently pressing said frame upwardly toward the platen embodying a rociiable ;'olce-lili:e mcn1 ber pivotally mounted on the platen-can riago, a spring for actuatini g" said member, and a bar su u ioited on said member pivotally connected to one oi? the shafts oi the fli dell-I0ll-flh'ltlll6 and normally bearing; upwardly against the under side oil? the other shaft.

2. ln a typewriting machine, a platen car riage, a platen rotatably nioiiinted ou the carriage, a tteeifl-roll-irame, means for forcing the frame away From the platen, and. means tor resiliently pressing said frame toward the platen eniboi'l ving a rockable member pivotally mounted on. the platen-carriage, the pivotal means at one end ol this member C(illl-llF-tlllg oi an open eye on the carriage and a pivot on. i-ied by the rocliablc uieml'ier, and a s irinp; or holding said pivot in said eye and serving at the same time to actuate the rocliable member.

:1). in a typewritingr machine, a platen carriage, a platen on the carriage, a teed-rollirame, on the carriage having front and real ieed-roll-supporting shalt, feed rolls on the shel'ts, means for itOlClllQ, the frame down wardly away from the platen, and means for resiliently pressing said frame toward the platen embodying a bar pivot-ally hung from one oil the sluifilts of the iced-r0ll-liraine by means oi? integral ears formed on the her, said bar having its other end pressing upwardly against the other shaft of the feedroll-trains, and spilug-actuated means nori'nally pressing upwardfi on said bar.

4. in a t' 'pewriting machine, a platen earriage, a platen on the carriag ge, a feed-rollframe on the carriage, means "For forcing the frame away from the platen, and means for resiliently pressing said frame toward the platen eiubi'idyinn a roc-hable member on the plate i-cai'riagle the pivotal means at one end of this rocltable member consistingof an open eye and a pivot worleiiip; therein, a spring for holi'lin this pivot in said open eye and rocltingr the member in one direction, and a stopuueuiber on the rocltable her for pr. outing); endwise movement roclnihle member.

in a typewriting; machine, a platen can i, a platen on the earrings, :1 teed-rollll U rear feed-roll-supporting shafts, means for forcing the frame downwardly away from the platen, and means for resihently pressing said frame toward the platen embodying an equalizing bar connecting the front and rear shafts of the feedroll-frame midway their ends, a rockable member mounted. on the platen-carriage, and a spring for actuating said member, said member being provided with a finger engaging the under side of said equalizing bar and having its engaging face rounded to form a pivotal support for said equalizing bar.

6. In a typewriting machine, the combination of a platen carriage, a platen rotatably mounted on the carriage, a pair of floating feed-roll frames arranged end to end, tandem feed-rolls mounted in each of said frames, and yieldable means for supporting said frames and pressing the same toward. the platen, said supporting means being connected with the frames substantially midway the ends of the frames at points at opposite sides of the longitudinal center lines of the frames.

7. In a typewriting machine, the combination of a platen carriage, a platen on the carriage, a floating feed-roll frame under the platen, cast-off mechanism for the frame having a pivotal vertical lost-motion connection with one longitudinal edge of the frame and interlocked with the frame to restrain side and endwise movements of the frame, and yieldable means interposed be tween the frame and carriage engaging the frame substantially midway the ends of the frame adjacent both longitudinal edges of said frame and forming with the cast-off mechanism the only supporting means for the frame.

8. In a typewriting machine, the combination of a platen carriage, a platen rotatably mounted on the carriage, tandem feedroll shafts, two feed-rolls on each of the shafts, a manually rockable cast-off shaft, connections between the cast-off shaft and feed-roll shafts for successively casting off the feedrolls when the cast-off shaft is rocked in one direction, a pressure distributing member engaging both feed roll-shafts between the aligned feed rolls on each shaft, and yieldable means on the carriage having a rocking connection with said member at a point intermediate the feed-roll shafts.

9. In a paper-feed mechanism, the combination of a platen, a pair of tandem feedroll shafts. feed-rolls on each shaft at both sides of mid-length of the shaft, a springurged member, pressure equalizing means loosely and rockably mounted on the springurg'ed member intermediate the shafts and pressing against said shafts midway the ends of the shafts, and a pair of rigid members in which the ends of the shafts are mounted.

10. In a paper feed mechanism, the combination of a platen, a pair of tandem feedroll shafts, a member extending transversely of the platen and pressing against the shafts toward the, platen substantially midway the ends of said shafts. fccd-rolls on each shaft at both sides of said member, and springurged means supporting said member iutcrmediate the shafts to tilt at either end away from the platen and pressing said member toward the platen.

11. In a paper feed mechanism. the combination of a platen, a pair of tandem feedroll shafts, a member exiending transversely of the platen and pressing against the shafts toward the platen substantially midway the ends of said shafts, fced-rolls on curb shaft at both sides of said member. a pivoiall mounted device tiltably supporting :nid. member intermediate the shafts 1o ield :11 either end away from the platen. and a spring nori'i'mlly swinging said device in a direction to press said member toward the platen.

In a paper feed rii-chanism, ihc combinction of a platen, a pair of tandem fccdroll shafts, a member extending, transversely of the platen and pressing against the shn l'i's toward the platen substantially miduxrv the ends of said shafts, feed-rolls on each shaft at both sides of said member, a pivolnl-ly mounted device on which said member is rockably supported intermediate the shafts to move away from the platen at either end. a spring normally swinging said device in a direction to press said member toward th platen, means for maintaining the shafts iz: spaced relation, and means cooperating wiii; said lnst-mentionci'l means for forcing thc shafts away from the platen to cast-oil the feed-rolls.

13. In a paper feed mechanism, the com-- bination of a platen carriage, a platen on the carriage, a spring-urged device having a separably interlocked rocking connection with the carriage, a pair of tandem feed-roll shafts, and a pressure-distribiiting member engaging both shaft substantially Ylll(l\\':l their ends and tiltably supported intcrmcs diate its ends on said device.

14. In a papenfced mechanism, the combination of a platen carriage, a platen thereon, a pair of swinging members having sepnrahly interlocked pivotal connections with the carriage, a spring connected with said members to swing the members about their pivots in opposite directions toward the platen and hold said members against disconnection from the carriage. and iced .rolls pressed toward the platen through the medium of said members.

15. In a paper-feed mechanism. the combination of a platen carriage, a platen thereon, a pair of swinging members having separably interlocked pivotal connections life an ry-3,578

with Him camriage, a spring; connovm] Wibh said members to swing thaz mcmi rs on their. pivots in opposife directions toward tha pla'ien and hold said mamhers a; inst dis connection from the carriage, two sets of: tandem feed-r011 shafts arranged side by side along the platen, feed rolls on the shafts,

and. a pair of pzrcssu IQ-(hSlJiihl1mm 1005915 seated on the firm ends 0']: said members and Arch connected with a different set of tandem 10 fEGd-IOH. shafts.

This specification signed this sixth day of 1?? ovenlher, A. D. 1918.

FRANK H. ARMSTRUNG.

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