US1453579A - Typewriting machine - Google Patents

Description

May 1, 1923;

F. H. ARMSTRONG TYPEWRITING' MACHINE 5 Sheets-Sheet 1 Filed Nov. 9

I I 30 3a 29 MVENTOR QMMM A'TToRNEYs May 1, 1923. 4,453,579

F. H. ARMSTRONG TYPEWRITING MACHINE Filed Nov'. 9, 1918 5 Sheets -Sheet M BY M 179W ATTORNEYS May 1, 1923. 1,453,579 7 i F. H. ARMSTRONG TYPEWRITING MACHINE Filed Nov, 9, 1918 5 Sheets-Sheet 5 INVENTOR MKW M 7.29am) ATTORNEYS Patented May 1, 1923.

UNITED sr FRANK H. ARMSTRONG, AUBURN, 'NEW YORK, ASSIGNOR TO CORONA TYPEWRITER,

COMPANY, INC., OF GROTON, NEW YORK, A CORPORATION OF NEW YORK.

'rYPEwRIrING MACHINE.

Application filed November 9, 1918. Serial No. 261,851.

T all whom it may concern:

die it known that I, FRANK H. ARM- s'rnoxu, a citizen of the United States of America, and a resident of Auburn, county of Cayuga, Statev of New York, have invented certain new and useful Improvements in Typewriting Machines, of which 'the following is a full and clear specification.

This invention has-relation to that type of paper-feeding devices covered in my copending application Serial No. 256,195, filed September 30, 1918, and the object of the present improvements is to provide a simple 1 and easily-manufactured mechamsm for normally pressing the two paper-feedframes toward the platen, as more \fully hereinafter set forth. In the drawings'-- Fig. 1 is a perspective view of a platencarri'age, the platen-roller and one endflange being broken away;

Fig. 2 is a longitudinal sectional view taken through one end of the carriage; Fig. 3 is a plan view'of Fig. 2, the platenroller being omitted, and part of the rockshaft being broken away;

Figs. 4, 5 and .6 are detail vertical sec tionai views showing the manner of pivotall ,"s1ipporting the transverse rock-bar;

- Figs. 7, 8 and 9 are detail views hereinafter described;

Figs. 10, 11, 12 and 13 are vertical sectional views showing the different positlons of the paper-feed mechanism; and

Figs. 14 and 15 are inafter described.

Referring to the drawings annexed by reference characters, 15 designates the p atencarriage provided at each end with an upstanding flange 16 in whlch the ends of the shaft 17 of theplaten 17 are journaled i the usual manner. Y

Extending between the end-flanges 16a the full length of the carriage, is a sheet-metal bar 18 which constitutes a rock-shaft vby reason of the fact that each of its extreme ends is bent downwardly to form an ear 19,

which ear is pivotally supported on a screw-.

pivot 20' threaded from the outside inwardly through the end-flange 16, the bar being rockable upon these pivots 20. ThlS bar is located behind the platen and at a point about on a horizontal level with the views of details hereunder face of the platen. The rear edge of the bar is bentdownwardly to form a longitudinal flange 21 to stiffen the rock-bar, and the 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 and 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 cam-lever 24 pivotally mounted on platen-shaft 17' close to the inner face of one of the endfianges 16 of the carriage, the cam part of this lever being provided with two working faces 25 and 26, adapted to alternately c0- operate with the upper edge of an arm 27 formed integralwith the rock-bar 18 and 'bent to fitv flatwise against the adjacent end 16 of the carriage so that its free forward end will lie directly under the two working faces of thecam 24, said arm 27 being normally held up against one or the other of said working- faces 24 and 25 by a retractile spring 28. When 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 and thus ,bring the other camface 26 intolocking relation with the upper edge of the arm 27, the rockable bar '18 will have its forward edge tilted downwardly I 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 each pair to space them apart. Each of the front-shafts 30 is journaled loosely in upstanding ears 33 formed integral on the forward ends of a pair of flat bars 34, and each of the rearshafts 31 has each of its ends journaled in a pair of upstanding ears 35 formed inte-- grally with the rear end of each of the bars 34, so that each set of rolls forms a substana pair of the 23 bear downwardly upon the rear ends ofthe bars 34 and thus tilt said bars downwardl In its preferred form, which is that illustrated, 1 arrange the bent ends of the fingers 22 So that each will lie between ears 35 in such position that the shaft 31 will extend through the hooklike 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 intheir 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 fingers 36 which are bent downwardly at their forward 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 reason that I provide said stop-lugs 36. In this way, I avoid the necessity of providing the shafts '31 with stop-collars adapted to abut against the ears 35. For the same rea- Gil . upon u on the upper son, I 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 front-shafts 30. The foregoing parts are constructed and arranged substantially as in my aforesaid copending application.

Each of the rectangular frames, of which parts 34 form the end bars, is supported the flat outer ends of sheet-metal arms 38, these arms being formed integral with and extending inopposite directions at right bars 39 pivotally mounted face of the platen-carriage, t ese two bars 39 extending transversely of the carriage and lying parallel with each other. The front ends of the bars-39 are provided with forwardly-projecting integral pivots 40 which work in cats 41 struck up from the bottom-plate ofthe platen-carriage; and the rear end of each bar 39 is pivotally connected to the platen-carriage by a lug 42 stam ed up from the platen-car riage plate ant including upwardly and laterally therefrom to form an open crotch. These two lugs 42 extend in opposite directions, that is, toward the respective ends of the platen-carriage, and the rear ends of the bars 39 are normally held in the crotche: formed by these lugs by means of a coilspring 43. whereby it will be unnecessary to employ closed pivot-holding ears at these rear ends of the bars 39, thereby contributangles to fiat ing not only to cheapness of manufacture but also to ease of assembling the parts.

The spring 43 is connected to the bars 39 by means of upstanding rock arms 44 provided with notches in their vertical edges to receive the hooked ends bf the spring, these notches being duplicated along the said vertical edges to enable the spring to be adjusted bodily inwardly and outwardly on these arms tothereby vary the tension of the spring. The upstanding rock arms 44 are connected to the bars 39 at a distance from their pivotal-points in the'lugs 42, this offsetting of the arms 34 being obtained by mounting the same on the outer ends of laterally-extending arms 45 formed integral with the rear ends of bars 39. To prevent undue endwise JllOVGlIlQllt of the bars 39 rearwardly, each bar is provided along its inner edge with a stop-lu '46 which is adapted to abut against the front edge of the adjacent pivot lug 42. It will be observed shaft 18 is ro'cked to a position in which its I upper face is 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 arms 38 and their spring-actuated connections; and that when said bar 18 is rocked by swinging arm '27 downward in the manner heretofore described the downwardly-bent. ends of the fingers 22 willstrike against the rear end of all the bars 34 and first swing them downward about the front feed-roll-shaft far enough to retract the rear feed-rolls 29 but still leave th. front feed-rolls in working position.

further depression of the fingers 22 will swing the. bars 34 clownwardly about the axis of rock-shaft 18 (and thus bring about a corresponding depression of the forward ends of the bars 34) by the following means:

Several (preferably 4) of the ears 35 are each extended upwardly and rearwardly to a point above the upper flat surface of the rock-bar 18. thus forming hook-like roe-k arms 45. The initial rocking of the rockbar 18 and the bars 34 brings the rear extremities of the arms 45 into contact with said rock-bar 18 so that after the rear feedrolls have been retracted from the platen these arms 45 interlock with the rock-hai- 18 in the manner of a knuckle-joint and thereby cause the further rocking of the rock-bar 18 to swing the bars 34 with the rock-bar. as shown in Fig. 13. in which posit1on both springs 43 are extended to maximum and the angular rocking members 38,

. ing provided with a I pendent movement of the bodily up and down,

-bers to restore all the hereinbefore described; and when the bandle-end of the cam-lever is moved rearwardly, as shown in full lines in Fig. 14, to bring the other cam-face 25 into action, the spring 28 will draw the rock-bar 18 to normal position and thus ermit the springs 43 and the pairs of angu arrocking meming position. The bars 34 have loose rockarms 38 and the angugradually del'ar supporting members are pressed by said bars to positions flat upon,

the base of the carriage as-the shaft 18'is rocked in a direction to cast-off the feed rolls.

It will be observed that the outer extremities of the arms 38 are bentdown-. wardly at 38' to pass under the bars 34; and that at points coincident with'these' bentdown ends the platen-carriage is provided' with holes 51 to permit these bent ends to pass down through the top-plate of the platen-carriage when the bars 38 are depressed to their lowermost position; in this way, compactness in my device is further provided for.

The sheet-metal prox'ided at its forward ed mg ears 53,which are rigidly fastened to the rear face of the scale-bar 54-. The paper-guide is provided at intervals with paper-guide pan 52 is ongltudinal slots 55 through which the feed rolls extend. and, for the purpose of ensuring a positive movement up and down of the guide in unison with the feed-rolls, I provide the guide at each end with a depending car 56 for engagement with the ad Jacent front feed-roll shaft .30, said ear behole through which the shaft extends.

The pivotal connection of the roll frames with the rock shaft 18 and the vertical play of the rear. feed-roll shafts permitted by the space between the shafts and the bottoms of hooks 23 and the space between the bottoms of hooks 23, and bars 334. permit indefeed-roll frames and also permit either the front or rear edge of either of the frames to swing away from the platen. while the rock shaft is in normal position, as more fully set forth in my application before referredto. As either of the angular supporting members may swing independently of its com anion member. it will be obvious that eit' er end of either frame may swing away from the platen.

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

feed-rolls to work-' ge with depend-'- \l v .1. In a-typewriting machine, the combination of 'a platen carriage. a platen rotatably mounted on the carriage, a feed-roll frame. tandem feed-rolls mounted in the frame, and

a pair of springurged niem'bers engaging opposite ends of the frame and plvotally mounted on the platen, carriage to swing about axes extending transversely of Y the platen. i v 2. In a typewriting machine the combination of a platen carriage. a platen rotatably mounted on the carri age,'a feed-roll frame. tandem feed-rolls mounted in the frame; means for positively Y shifting the frame away from the platen to cast-off the feedrolls. a pair of rocking-members mounted on the carriage and engaging the frame adjacent opposite ends of the frame. and a single spring for rocking both of said'members toward the platen.

3. In a typewriting machine, thecombination of a platen carriage, a platen rotatablv mounted tandem feed-rolls .mounted in the frame, and a pair of spring-urged members mounted on the platen carriage to swing about axes extending transversely of the platen and engaging the frame adjacent opposite ends of tandem feed-rolls.

.tion of a platen carriage, a platen rotatably mounted-on the carriage. a floating feedroll frame, tandem feed-rolls mounted in said frame, a' pair of members mounted on the platen carriageto swing about axes extendmg transversely of the platen and exertingpress'ure on said frame at two longitudinally spaced points intermediate the tandem feed-rolls, and a single spring-for normally swinging both ofsaid members toward the platen.

5. In a tvpewriting machine the combination of a p aten carriage, a platen rotatably mounted on the carriage; a feed-roll frame. tandem feed-rolls mounted in said frame. cast-off mechanism for shifting said frame toward and from the platen, connections between the cast-off mechanism and the frame for permitting a limited movement of either or'both longitudinal edges ofthe frame toward and from the platen'independently of on the carriage,.a feed-roll frame,

the castofl mechanism and restraining sidewise and endwise movements of the frame, a pair of pressure mounted on the carriagelto swing about axes extendin transverselyof the platen and engaging t e frame ad acent opposite ,end's of the frame at points intermediate the tandem feed-rolls. and a single spring for forcing said members toward the platen with anniform pressure.

6. In a typewriting machine, the combine a platen .rotatably g tion of a platen carriage,

mounted on the carriag a feed -rollfram members pi votally.

cach provided with an arm extending tandem feed-rolls mounted in the frame, a pair of members extending transversely of the carriage and pivotally connected adjacent their opposite ends to the carriage and longitudinally of the carriage under the feedroll frame. said arms extending in opposite directions and engaging the frame adjacent opposite ends of the frame, and'a spring connected with said members to cause said arms to exertu'niform pressure on the frame.

7. In a typewriting machine, the combination of a platen carriage, a platen rotatably mounted on the carriage, a pair of feed-roll frames arranged end to end, tandem feedrolls mounted in each frame, cast-off mechanism for simultaneously shifting both frames awa v from the platen, two pairs of rocking members mounted on the carriage, the two members of each pair exerting pressure on one frame only at points adjacent opposite ends of the frame and intermediate the tandem feed-rolls in said frame. and a pair of springs each of which is connected to one pair of said members to cause each pair of members to exert a uniform pressure on the frame engaged thereby.

8. In a typewriting machine. the combination of a platen carriage, a platen on the carriage. a feed-roll frame on the carriage. means for forcing the frame away from the platen. a pair of members pivotally mounted on the carriage to swing about axes extends ing transversely of the carriage and engaging the frame adjacent opposite ends of the frame. each of said members being provided with an actuating arm, and a spring connecting said actuating arms to cause the members to exert a uniform pressure at different points on the feed-roll frame.

9. In a paper feed mechanism. the combination of a platen. a plurality of sets of tandem feed-rolls. a plurality of pairs of pivotally lll)])()llttl pressure-distributing memhers. each of said pairs of members cooperating with a different set of tandem feed-rolls to press the same toward the platen. and a plurality of springs each of which is connected with a different pair of pressure-dis- .tributing members to swing the two members connected therewith in opposite directions about their pivots toward the platen.

1 In a t \pe\v1'iting machine. the combination of a platen carriage. a )laten on the carriage. apair of tandem feed-rolls. means for rotatabl v supporting the rolls in spaced relation. a pair of pressure memberspivotall v mounted on the carriage and connected with the roll-supporting means at different points to permit independent or simulta- Htuti movement of the rolls awa v from the platen and endwise tilting of the rolls relatively to the platen, and cast-off means for swinging'first one and then the other of said rolls away from the platen against action of said pressure members. a

11. In a paper feed mechanism, the combination of a platen, a floating feed-roll frame. tandem feed-rolls in the frame, a pair of pivotally supported members on which said frame is mounted to tilt at either end or either longitudinal edge away from the platen, and a spring connected with both of .said members to normally rock said members members at either of a plurality of points to vary the pull of the spring thereon.-

13. In a paper feed mechanism. the comblnation of a pair of pivotally supported members. a coil spring (onnected at its ends withsaid members to normalllv swing the members in opposite directions about their pivots, and a feed-roll frame having tandem feed rolls thereon and loosely supported directly on said members intermediate the tandem feed-rolls at points spaced apart longitudinally of the rolls.

14. In a paper feed mechanism. the combination of a platen. a feed-roll frame. tandem feed rolls on the frame, and a pair of spring-urged pivotally supported members on which said frame is mounted at spa-red aligned points to move away from the platen against the pressure of either or both members and to rock on said members about an axis extending transversely of the pivotal axes'of said members through the points" of connection of the members with the frame.

15. In a paper feed mechanism. the combination of a pair of tandem feed-roll shafts. feed rolls on said shafts, a platen, a pair of pressure members each pivotally mounted to swing about an axis extending transversely of the platen. means connected with both shafts at points spaced apart longitudinally of the shafts and supportedon said members to rock about an axis extending longitudinallv of the shafts and intermediate said shafts. and spring means for normally rocking said members in opposite directions about. their pivots towardthe platen.

16. In a paper feed mechanism. the combination of a platen. a plurality of feed-roll frames. tandem feed-rolls in each frame. a plurality of springs. and means interpo ed between each spring and a difierent one of said frames for independently yieldahlv pressing opposite ends of its associated frame toward the. platen. each of said f 'ames being liltably mounted on its associated spring pressed means to rock thereon about an axis extending longitudinally of the frame substantially midway between the tandem feed-rolls.

17. In a. paper feed mechanism, the-combination of a platen, a plurality of feed- 7 roll frames, feed-rolls in said frames, a plutwo members connected therewith in opposite directions about their pivots toward the platen.

18. In a-paper feed mechanism, the combination of a platen, a plurality of feed-roll frames, feed-rolls in the frames, a plurality of. pairs of oppositely swinging members,-

each of said pairs of members loosely engaging a different frame adjacent opposite ends springs normally swin ing the two members connected therewit in opposite directions about their pivots toward the platen, and cast-off means for simultaneously forcing the frames away from the platen having direct lost-motion connections with the frames permitting the frames to yield relatively to the platen independently of movement of the cast-off means.

19. In a paper-feed mechanism, the combination of a platen, a plurality of pairs of swinging members, a plurality of springs each normally urging one pair of said members toward the platen, a plurality of feed roll frames each resting loosely on one pair of said swinging members adjacent opposite ends of the frame, a. set of tandem feedrolls in each frame, and rockable means connected with all of said frames for first tilting the frames on said swinging members about the axes of the forward feed rolls and then swinging the frames bodily. about the axis of oscillation of said rockable means. of the frame, independent springs oonnec-t ing the pairs of members, each of said This specification signed this sixth day of November, A. D. 1918.

FRANK H. ARMSTRONG.

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