US1737113A - Typewriting machine - Google Patents

Description

Nov. 26, 1929. A. B. ELY r AL TYPEWRITING MACHINE Original Filed Oct. 31, 1925 4 Sheets-Sheet 1 INVENTORS &

ATTORNEYS Nov. 26, 1929. A. B. ELY ET AL TYRE-WRITING MACHINE Original Filed Oct. I '4 Sheets-Sheet 2 lllllllllllflllllllllll INVENTORS ABE) m m E Y B ATTORNE Nov. 26, 1929.

A. B. ELY ET AL TYPEWRITING MACHINE Original Filed Oct. 51, 1925 4 Sheets-Sheet 3 mmw Nun Nov. 26, 1929. A. B. ELY ET AL 1,737,113

TYPEWRITING MACHINE Original Filed Oct. 31, 1925 4 Sheets-Sheet 4 LineLocA' Release/11 INVENTORS 14.8.5] & EL/farmon.

ATTORNEYS Patented Nov. 26, 1929 UNITED STATES PATENT OFFICE ALONZO B. ELY AND EDWIN I1- HARMON, OF GROTON, NEW YORK ASSIGNORS TO L C SMITH & CORONA TYPEWRITERS INC., 01 SYRACUSE, NEW YORK, vA CORPORATION OF NEW YORK TYPEVRITING MACHINE Original application filed October 31, 1925, Serial No.

1927. Serial This invention relates to improvements in typewritin machines, and more particularly to margin controlling means (including linelocking, line-lock alarm and line-lock-releasing mechanism) for use in such machines.

Features of the invention include improved adjustable means for controlling right and 1-efthand margins, improved line-locking and line-lock-releasing means, line-locking means shift-able with a platen carriage for preventing printing strokes of the type bars and relea'sa'ble from the keyboard of the machine, and provision of means for blocking printing strokes of the type bars through the medium of a type-bar-actuated universal bar for the carriage escapement.

Other features and objects of the invention will appear from the following description in detail of the preferred embodiment of the invention illustrated in the accompanying drawings, in which Fig. 1 is a vertical longitudinal sectional view, approximately through the center of the machine;

Fig. 2 a partial sectional view showing the case shift mechanism, the parts I-being in upper-case posit-ion;

Fig. 3 a rear elevation of the machine with the rear wall of the main frame broken away;

Fig. at a perspective'view of a part .of the line-lock alarm device;

Fig. 5 a fragmentary end view of the platen carriage;

6 a detail perspective view showing the left-handmargin stop on the carriage and the cooperating fixed stop;

Fig. 7 a detail perspective view .of the final stop for the carriage at the left-hand end of the carriage;

Fig. 8 a perspective view of the fixed stop device on the carriage bed;

Fig. 9 a rear elevation, partly in section, showing parts of theline-lock, alarm, marginrelease, and ,escapement devices;

Fig. 10 a top plan view showing the carriage bed with some of the parts associated therewith;

Fig. 11 a detail perspective view showing the line-lock lever and its mounting;

66,000. Divided and this application filed July 28, No. 208,988.

Fig. 12 a perspective View showing the linelock-releasing means, and also showing the right-hand margin stop about to engage and move the line-lock lever into locking position Fig. 13 a vertical sectional view of the escapement rocker an d bracket, the escapement rocker and dogs being in normal position;

Fig. 14 a fragmentary plan view of the line-lock-releasing means;

Fig. 15 a detail perspective view showing the line-locking lever in locking position; and

Fig. 16 afront elevation of the escape-ment mechanism, the escapement bracket being partly broken away.

This application is a division of our application -for Patent Serial No. 66,000, filed {3ctobe-r 31, 1925,

Referring to the drawings, it will be seen that the main frame of the machine is low or flat and comprises the side walls '1, front wall 2, rear wall 3 and a transverse partition wall 4, all formed as an integral casting. The flat transverse partition wall .4 inclines upwardly and rearwardly at an angle of 30 to a vertical plane. A slotted type-bar pivot segment 9 is secured to the front face of the transverse partition wall 4. Segment 9 is provided with the usual radial slots 13 in which the type bars 17 are pivotally mounted upon an arcuate pivot rod-0r wire 14. The segment and pivot wire lie in planes parallel with the plane of wall 4, i. e. in a transverse plane inclined rearward at an angle of 80 from the vertical. The heels of the type bars are pro vided with the usual tail lugs 20 connected by links 21 with sub-levers -23 pivoted on a curved pivot rod 24 mounted a radially slotted segment 25 lying in a horizontal plane and extending transversely of the frame below the forward ends of the type bars, with its concave edge facing rearwardly. 'Theseg ment 25 is secured at its ends to the main frame side walls 1. The sub-levers 23 are connected by vertical links 32 with the character key levers 34. The heads of the type bars are supported on a type rest 4572-473 and each carries two types.

The key-levers are guided in a slotted comb 4:0 and have portions adapted to cooperate with a stop pad 38 up against which all the mounted on the. main frame.

key levers are held when in normal inactive position. The pad 38 is preferably cemented on the under side of a horizontal step 39 on the key lever guide comb 40. Comb 40 is provided with lugs 41 at its ends which are held to walls 1 by screws 42. The main body portion of the comb-40 depends vertically from the forward edge of step 39 and is provided with a plurality of vertical guide slots for guiding the key levers. It will be noticed that the stems of the upper or rear bank of keys do notextend upward in front of the main vertical portion of the comb 40 but, on account of the reverse loops 36 (which extend through certain of the guide slots in the comb 40), said stems extend upward back of the pad 38 through a rearwardly extending horizontal shelf portion 45 of the guide comb member which is provided with a series of fore-and-aft extending guide slots 46 for the key stems of the rear bank of keys. The forward edge of shelf 45 is connected with the rear edge of pad step 39 by a vertical wall portion.

The mainportions of the key levers 34 all extend substantially horizontally rearward under the sublever segment 25 and the transverse partition wall 4, and then upward and rearward behind wall 4. The rear upper ends of all of the key levers are pivotally supported on a transverse pivot or fulcrum rod 51 held to the rearwardly bent upper portion of a sheet metal fulcrum-supporting plate 54, the main flat body portion of which I is secured to the rear face of the partition wall 4. The key levers 34 are provided with depending cars 59 adjacent the rear ends of the main horizontal portions of the lovers, which ears are connected by means of springs 60 with a sheet metal anchor bar 61, held in slots in bracket arms 124.

Universal bar mechanism for operating the escapement mechanism of the machine is Fulcrum plate 54 is provided with integral rearwardly and downwardly extending arms 63 in which a rock shaft 64 is rotatably supported on pivot screws 65. Shaft 64 is provided with upwardly and rearwardly extending rock arms 67 the upper ends of which are pivotally secured to the side bars 68 of a vibratory uni- Versal-bar-supporting frame by screws 69. This frame is substantially H-shaped in plan, the side. bars thereof extending fore and aft of the machine and being connected by a cross bar 70. The forward ends of the side bars 68 are rigidly secured to an arcuate escapement-operating universal bar 73 located and vibrating wholly within an arcuate groove or channel 9 in the back face of the type bar pivot segment 9. The universal bar 73 is adapted for operation directly by the type bars 17 which are provided with lugs 74 on their leading edges, slightly forward of their pivots, the lug on each type bar being arranged to engage the forward edge of the universal bar when the head of the type bar is broughtsubstantially to the highest point in its throw, i. e., in the vertical transverse plane of its pivot. he side bars 68 extend through suitable apertures in the transverse partition wall 4 and through suitable apertures registering therewith in the fulcrum plate 54. Side bars 68 extend downward and rearward from universal bar 73 and the rear ends thereof are pivotally connected by screws 77 with the upper ends of a pair of upwardly and rearwardly extending links 78, which are pivotally supported at their lower ends by screws 79 on bracket arms 80 integral with and extendingforwardly from a bracket 81 secured to the rear wall 3 of the main frame by means of screws 82. Screws 69 and 77 are disposed in the same horizontal plane, and screws 79 are disposed in the same horizontal plane as rock shaft 64 so that the universal bar 73 will vibrate in a path substantially perpendicular to the plane of the type bar segment and pivot wire between the front wall of recess 9 and the front face of frame wall 4.

The universal bar frame 6870 is adapted to operate the carriage escapement mechanism which is mounted upon and shiftable with the platen carriage shift frame. The

crossbar of the universal bar frame is provided with an integral, fiat, depending escapement-actuating tappet 87 extending in a plane at right angles to the direction of vibration of the universal bar frame and parallel with the plane of shift of the platen carriage, as hereinafter described. A spring 88 (Fig. 3) extending forward from the rear end of the left side bar 68 of the universal bar frame and having its forward end anchored to the fulcrum plate 54, is adapted to normally hold the universal bar 73 against the forward wall of channel 9 in the segment 9.

The escapement operating frame 6870 is also adapted to be operated by the space bar 91 which is secured to the forward ends of a pair of rock arms 94 rigidly secured to a shaft 95 journalled in ears 97 on key lever guide comb 40. The rock shaft 95, near the middle thereof, is provided with a forwardly and downwardly extending rock arm 98 and a link 99 is pivotally connected thereto by means of a screw 100. The link 99 extends rearward under segment 25 and wall 4 to a stud or screw 102 secured in the left one of the rock arms 67 which, as previously pointed out, support the escapement universal bar frame 6870. The rear end of the link 99 is provided with slot 103 extending in the direction of movement of stud 102 and in the forward end of which said stud 102 is normally engaged, so that the type bars engaging the universal bar 73 may move the frame 6870 rearward without rocking the space bar 91 and, likewise, the space bar 91 may be operated at any time to move the frame 6'870 independently of the type bars.

The platen 301 is supported for impact of the type on the upper front quarter thereof and for case-shift movement in a plane parallel with the plane of the type bar pivot wire 14 and wall 4, so that the printing point shifts in changing case in a plane inclined rearward at 30 to the vertical. The shift frame for the platen carriage and the means for guiding and shifting said frame will be now described. On each of the side walls 1, just back of the partition Wall 4, sheet metal brackets 132 are secured to the respective side walls, together with sheet metal plates 138 which are provided with V-shaped grooves or ball races 139 lying at an angle of 30 to the vertical, i. e. parallel with wall 4. The brackets 132 are provided with the forwardly projecting arms 124 to which the transversely extending spring anchor bar 61 is held as previously set forth. The brackets 132 are further provided with inwardly bent lugs 151 which lie in a plane at right angles to the plane of shift of the platen and are provided with stop screws 152. Thestop screws 152 cooperate with rearwardly projecting lugs 154 formed on sheet metal brackets 155, which are secured to the under side of the flat carriage bed 157 at opposite ends thereof and are held in spaced parallel relation by a tie rod 162.

The shift frame brackets 155 are formed with forwardly projecting angle pieces 169 provided with elongated apertures 171 extending in a plane at an angle of 30 to the vertical, i. e. parallel with wall 4 and typebar pivot wire 14, to form raceways for the balls 172 mounted in the apertures 171 and rolling in the V-grooves 139 of the race members mounted on the side walls 1 of the main frame. A ball-bearing support is thus provided for the platen shift frame whereby the platen 301 and its traveling carriage are guided to shift in a plane parallel with the inclined plane of type-bar pivot wire 14. Stop screws 152 are adapted to engage the lugs 154 to limit the downward movement of the shift frame or determine the normal lower-case position of the platen. The uppercase shifting movement of the platen and shift frame is limited by stop screws 173 which are secured to the brackets 155 and are adapted to engage the under sides of rearwardly projecting lugs 178 on inwardly projecting arms 179 formed as part of the brackets 132.

A rock shaft 180 is provided with forwardly projecting rock arms 181 carrying laterally projecting pins or studs 182 engaged in slots 183 in the angle portions 169 of the shift frame brackets 155. The rock shaft 180 is j ournaled on pivots on the side walls 1 of the main frame. The platen carriage and shift frame are adapted to be shifted from normal lower-case position (shown in Figs. 1 and 3) to upper-case position (sh-own in Fig. 2), by means of a shift key lever 189 pivotally mounted at 191 on a bracket 193 secured to the right-hand side wall of the main frame, the rear end of key lever 189 being slotted or forked (as shown in Fig. 2) to engage the laterally projecting stud 182 on the right-hand one of the rock arms 181, so that power may be applied to the shift frame for shifting the platen through the torsion frame (formed by shaft 180 and arms 181) by depressing shift key 198 on the forward end of the shift key lever 189. The carriage 221, 298, 299 is mounted to travel transversely of the machine, bearin s 219 and 248 being interposed between the carriage and the carriage bed 157.

The escapement mechanism shifts with the platen carriage and carriage bed. The feed rack 254 is held to the bottom of the carriage base plate 221, and the escapemen- t dogs 257 and 258 are adapted to cooperate therewith for feeding the platen carriage from right to left. The dog rocker 259 is formed with thelixed or holding dog 258 integral therewith and bent up at right angles to the plane of the main transverse body portion of the dog rocker, and also formed with depending pivot ears 286. The stepping or loose dog 257 is pivotally supported upon the fixed dog 258 in front of the fixed dog, by means of a screw 260 extending transversely of the rack. Dogs 257 and 258 extend upward through an aperture 261 in the carriage bed 157, and the dog rocker 259 is pivotally mounted on pivot screws 262 extending transversely of the machine and threaded through depending ears 263 and 264 of a bracket 265 which has its flat body portion secured by screws 266 to the under side of the carriage bed 157. Bracket 265 is provided with an aperture 267, registering with the aperture 261, through which dogs 257 and 258 project into positions to cooperate with the feed rack 254. The loose dog 257 is normally engaged with the rack.

The depending ear 264 at the right-hand end of the dog-r0cker-supporting bracket 265 is provided with a downwardly and forwardly projecting arm 285 having a hole in its lower end in which the lower end of a dog rocker return spring 287 is secured, the upper end of the spring being hooked over an arm 288 extending rearwardly and downwardly from the right-hand pivot car 286 of the dog rocker 259. Bracket arm 285 is pro vided with an inwardly projecting stop lu 289 adapted to cooperate with the forward edge ofa downwardly and forwardly extending rock arm 290 depending from the righthand pivot ear 286 of the dog rocker 259 to arrest the rearward movement of the dogs 257 and 258 under the action of the spring 287 with dog 257 engaged in the rack. The

lower end of the rock arm 290, which extends downward below the stop lug 289, is provided with a forwardly projecting nose 292 normally disposed opposite the lower portion of the rear face of the inclined operating lug 87 carried on the type-bar-actuated universal bar frame 6870. As the inclination of the escapement-operating lug or shoe 87 is the same as the plane of the case-shift movement of the shift frame upon which the dog rocker is mounted, the shifting movement of the dog rocker arm 290 with the carriage bed when the platen moves to upper-case position will merely position the nose 292 higher up along the rear face of the lug 87, the nose 292 on arm 290 moving up in a plane parallel with the face of the lug 87 The power drive of the platen carriage from right to left under control of the escapement dogs is obtained by the usual spring drum 293, on which is secured and wound one end portion of the usual draw band 594 passing overa pulley 595 journaled in an opening 596 in the carriage bed, and attached at its other end to a screw 602 (Fig. 9) threaded upward into the carriage base plate 221. Drum 293 is rotatably mounted upon the carriage bed 157. Rearward movement of the universal bar tilts the dog rocker to carry the loose dog out of the rack and the rigid dog into the rack, the carriage feeding one letter space upon return of the universal bar and dog rocker to normal position.

The platen carriage comprises the base olate 221, and end plates 29S and 299, the lower ends of which are secured to the ends of the carriage base plate 221. The shaft of the platen 301 is rotatably mounted in the carriage end plates 298 and 299 and provided with the usual finger wheels or knobs 302.

A suitable paper-feeding means is provided upon the platen carriage, including a paper table and guide 325, the front feed roller 330, and the rear feed rollers 334. A bracket 339 secured to the base plate 221 is provided with a rearwardly projecting car 341 in which the end 342 of a rock member 343 is pivoted, the other end of said member being provided with a forwardly and upwardly extending rock arm 344 formed with a finger piece at its upper end and pivotally supported on the reduced inner end of a screw 313 tapped through the right-hand carriage end plate 299. This forms a feed-roll-releasing roclr member which is provided near the pivot ear 341 with an upwardly extending rock arm 346, to which a wedge 347 is pivotally secured, the point of the wedge being directed toward the front of the machine between the rear face of the paper table 325 and the rear feed roller shaft 333. A .return spring 349 is connected at its forward end with lever 344 and at its rear end to a bracket or rock arm 350 mounted on the notched margin stop bar or rock shaft, as hereinafter described. The

paper-feeding and releasing means are the invention of F. H. Armstrong and are more fully shown and described in an application for patent therefor filed by him April 23, 1925, Serial No. 25,277, now Patent No. 1,619,013, dated March 1, 1927.

The left and right margin stops 364 and 365 are slidably mounted upon a graduated margin stop bar 366 of square cross-section, which is provided with notches 367 in the front face thereof, with which perforated ears 368 of springy metal clips 369 are adapted to cooperate, the clips 369 being secured at their lower ends to the respective margin stops 364 and 365 by screws 370, as more particularly shown in Figs. 6 and 12. Flat springs 598 held between the clips and mar gin stops by screws 370 normally press the upper ends of the clips rearwardly. By this arrangement the positions of the respective margin stops 364 and 365 along the bar may be adjusted to limit theleft and right margins, and the stop positions may be determined by the scale 371 on the rear face of the stop bar. The lower end of the left margin stop 364, as indicated in Fig. 6, is adapted to engage a rearwardly extending stop lug 372 formed integrally with the rear carriage gib 251 and thereby limit the return movement of the carriage toward the right. Gib 251 has a base flange held to the bottom face of the carriage bed 157 by screws 252.

The margin stop bar 366 is rockably supported on the end plates 298-299 of the platen carried by journal screws 373 passing through and j ournaled in apertures in the end plates and having threaded ends screwed in socketsin the ends of the bar 366. By thus mounting the bar 366 the latter may be rocked to move the lower ends of the margin stops thereon out of the field of the cooperating stop members 372 and 413 on the carriage bed to thereby permit additional movement of the carriage in either direction. The left margin stop 364 may be thrown out of the field of the stop lug 37 2 by rocking the rod 366 by pulling forward a finger piece 374 secured to the left end thereof. The finger piece 374 is provided with a forwardly bent lug 375 adapted to engage the rear side of the platen 301 and limit the forward movement of the finger piece. If the left margin step 364 is released by thus rocking the scale bar 366, and the carriage is moved farther to the right beyond the stop lug 372, the margin step 364 will simply ride over the right-hand cam face of the stop lug 372 and not interfere with the movement of the carriage when the carriage is again fed from right to left.

The right end of the margin stop bar 366 is provided with a sheet metal stop arm 350 (previously referred to) provided with a stop finger 376 adapted to engage the guide bar 249, held against the rear edge of the carriage base plate 221 by screws 250, thereby limiting the forward movement of the lower ends of the margin stops 364 and 365 under the action of the spring 349. The spring 349 was previously referred to as being connected to the rock arm member 344 for releasing the paper feed rollers. The stop arm 350 is provided with an inwardly projecting ear 377 to which the rear end of the spring 349 is secured, and is also provided with an inwardly projecting lug 378 lying adjacent to and parallel with the margin stop bar 366 for limiting the longitudinal movement toward the right of the right hand margin stop 365. The margin stop bar 366 is provided with a notch at 37 9 into which the outer edge of the lug 341 loosely enters, so that the latter will take the end thrust on the stop bar 366 and also serve as a means for limiting the movement of the margin stops 364 and 365 toward the center of the platen carriage. As shown in Fig 3, the rear face of the scale bar 366 is provided with a separate set of graduations 371 for each of the margin stops 364 and 365.

The right margin stop 365 is provided at its lower end with a stop nose 380 having a straight edge on the left edge thereof to serve as a stop for limiting the feed movement of the carriage toward the left and also to engage the rearwardly projecting lug 381 on the upper end of a bell clapper or hammer 382 mounted on a spring stem 383 secured by a screw 384 to the rearwardly offset end of a bracket arm 385, as shown in Figs. 3, 4 and 9. The bracket 385 is punched out of sheet 1 metal and is provided with a laterally extend ing arm 386 having a forwardly bent lug 387 which enters a hole 388 in the right shift frame bracket 155. The bracket 385386 is also secured to the right-hand shift frame bracket 155 by means of a screw 389 passing through the stem 390 of the bell 391 and screwed into a threaded hole in the right shift frame bracket 155 to thereby hold the bell 391 and the bell hammer bracket 385 in proper relation by means of a single screw and the lug 387. The lug 381 of the bell hammer 382 normally lies in the path of the nose 380 of the right-hand margin stop 365, so that at a predetermined point before the margin stop reaches the line lock stop lug 413 the bell hammer will be moved and released to strike the bell. The right-hand edge of the nose 380 of the right margin stop 365 is beveled, as shown, so that upon the return movement of the carriage said nose may pass the bell hammer lug without interfering with the return movement of the carriage.

The depending nose 380 of the right margin stop 365 is adapted, as the carriage feeds from right to left during the writing operation, to engage the stop lug 413 on the rear end of an irregularly shaped line lock lever 414 pivotally mounted on a screw 415 passing through the dog rocker supporting bracket 265 and screwed into carriage bed 157.

The rear or laterally swinging end of the line lock lever 414 is provided with a clownwardly extending lug 416 normally offset to the right of dog rocker arm 288, and which is adapted to be moved over the arm 288 (as shown in Fig. 15) to prevent upward movement of said arm thereby to prevent actuation of the dog rocker and universal bar 73 by the type bars. In other words, the key action will be locked so that the type bars cannot reach the platen, and the escapement will be locked against operation. Normally the line lock lever 414 is held in retracted position,-that is, so as not to block operation of the escape mentby means of a spring 417 which (as shown in Fig. 11) is connected at its forward end to an ear 264 of the dog rocker bracket 265. In order to limit the retracted position of the lever 414 the latter is provided with a rearwardly projecting finger 419 adapted to engage the head 420 of one of the screws 252 (previously referred to as adapted to secure the large gib 251 to the under side of the carriage bed), as shown in Figs. 10 and 12. Lever 414 is guided between a lug 600 on the main body of bracket 265 and a guide lug 599 on the bracket ear 264.

The spring 417 will normally hold the depending lug 416 out of the field of the arm 288 of the dog rocker, thereby permitting rocl-zing of said rocker by universal bar 73 to effect the usual step-by-step feed of the carriage as the type key levers are operated. When, however, the margin stop 365 reaches the predetermined end of the line, after having rung the bell 391, the nose 380 thereof will engage the lug 413 and move the line lock lever 414 to the position shown in Fig. 15, thereby moving the depending lug 416 over the arm 288, blocking vibration of the latter and preventing step-by-step feed movement of the dog rocker. W hen this occurs it is sometimes desirable torelease the line lock and permit additional feed of the car riage to the extent of a few spaces so that a word may be filled out if necessary. For this purpose a margin or line-lock-release key 421 is provided in the keyboard. This key, in the present instance, is carried on the forward end of a lever 422 pivoted at 423 on a screw 424 threaded into the lower end of a depending arm 425 on the bracket 193 on the right side of the machine, as will be seen in Figs. 1, 2, 10, 12 and 14. The forward end of the key lever 422 is provided with an extension 426 adapted to pass through one of the guide slots in the main vertically slotted web of the key lever guide comb 40. The key stem 428 of the line-lock-release key lies in line with the stems of the back row of type keys 35 and is guided in one of the slots 46 provided the upper shelf-like portion of the guide comb 40 for the key stems of therear bank of keys. The margin release key stem 428 is preferably provided with a laterally projecting bent-over lug 429 adapted to engage the upper horizontal face of the shelf adjacent the slot 46 in which the key stem slides to thereby limit the amount of depression that may be given to the line lock release key.

A rearwardly projecting finger 430 located back of the pivot 424 of the line lock release key lever is connected with the upper end of a spring 431 which is secured at its lower end to anchor bar 61 and is adapted to hold the line lock release key in normal position and restore it to that position after the key has been depressed. The rear arm 432 of the release key lever back of pivot 424 extends upward and rearward substantially parallel with frame wall 4 to a point in front of and slightly higher than the upper edge of wall 4 which is of reduced height at its right hand end as indicated at 601 in Fig. 14. The key lever arm 432 is connected by a rearwardly and downwardly extending link 433, passing through cut-out 601, with the depending lug 434on the outer arm 438 of an inwardly extending line-lock-releasinglever 435 pivoted at 436 on a screw 437 threaded upward into the lower face of the carriage bed 157, as will be seen in Figs. 9 and 10. The lever 435 is provided with an inner arm 439 extending inwardly along the under face of the carriage bed and offset rearwardly and upwardly at its inner end where it is provided with a nose 440 normally lying over the free end of the line lock lever 414 in position to engage the front face of the depending end or nose 380 of the right margin stop when the latter has engaged the stop lug 413 and shifted the line lock lever to locking position, as shown in Fig. 15..

It will be seen that when the line-lock-- release key 421 is depressed, after the dog lug 416 of the line-lock lever 414, the nose 380 of the right margin stop 365 will be pushed rearward back of lug 413 by the nose 440 of the lever 435, thereby permitting the spring 417 to restore the line-lock lever 414 and permit the dog rocker arm 288 to be vibrated in the usual manner each time the escapement universal bar 73 is actuated for the step-by-step feed of the carriage, lug 41 3 passing in front of nose 380 when key 421 is depressed. It will be noted that the left edge of the stop lug 413 on the line lock lever is beveled (see Fig. 15) so that after the line lock release key has been operated to release the lug 413 from the margin stop nose 380, the latter, when the carriage is returned toward the right, will be cammed rearward by the beveled face of the stop lug 413 so that the platen carriage may he re stored without interference from the margin stop or line lock lever. Link 433 swings up and down during case-shift movements,

about its pivoted connection with key lever arm 432. 1 1

In returning the platen carriage to the right for starting a new line the left margin stop 364, as previously explained, isadapted to engage the lug 372 on the gib 251 and thereby determine the left margin on the paper. If, however, it is desired to write within the left margin, the margin stop 364 is thrown out of the field of the lug 372 by manual operation of the finger piece 374 to rock the margin stop bar 366, thereby permitting the carriage to be moved an additional distance to the right. The final stop of the carriage in its movement to the right is adapted to be determined by the nose of a stop lug 441 secured by a screw 442 to the base plate 2'21 of the carriage near the left end plate 298 there of, as will be seen in Figs. 3, 7 and 9. The nose of the stop lug 441 is adapted to engage the left-hand overhanging projection 443 of the gib 251 on the carriage bed, thereby preventing further movement of the carriage toward the right.

It will be observed that the line-locking member, when in looking position, prevents actuation of the dog rocker which, in turn, prevents actuation of the universal bar, and that the locked universal bar will arrest any actuated type bars as they approach printing position and before said type bars are in position for type thereon to make an impression. It also will be observed that the type bars are held againstprint-ing by an arcuate universal bar which is mounted on the main frame and is locked by line-locking means shifting with the platen; that the line-locking means is releasable by a key on the main frame at whatever letter-space position the line-locking means is set to lock the carriage, and that the releasing means is operable in whatever case position the carriage may be when the line is locked.

vVhat we claim is 1. A typewriting machine comprising a main frame; a platen shift frame mounted therein for shifting movement at an angle of approximately 30 to the vertical; a linelock release lever pivotally mounted on said shiftframe; a line-lock release key lever pivotally mounted on said main frame; and a. link connection between said release lever and the key lever, whereby the release may be operated by the key lever in either the normal or shifted position of said shift frame.

2. The typewriting machine as claimed in claim 1, in which a platen carriage traveling on said shift frame carries fore-and-aft-rockable margin stops and said line-lock release lever on the shift frame is pivoted on an upstanding pivot to cooperate withone of said margin stops to rock the same to release the carriage for additional forward movement.

3. The typewriting machine as claimed in claim 1, in which a spring is connected with said line-lock release key lever for restoring the latter and said line-lock release lever to normal position.

l. In a typewriting machine, a main frame; a carriage bed; a platen carriage movable across the frame on the bed; a marginstop bar on the carriage, rockable about an Xis extending transversely of the frame; a right-hand-margin stop adjustable along and rockable with said her and extending therebelow; key-operated type bars; an escapeme'nt rocker mounted on the bed; a universal bar operable by the type bars to actuate the rocker; a locking member yieldably held in inactive posit-ion and pivotally supported on the bed for movement by the pendent stop portion into a posi ion for directly holding the rocker against actuation to lock the ma chine against printing and carriage feeding; a stop on the bed engageable by said member to arrest the member and margin stop in ma chine-locking position; a release lever pivotally mounted intermediate its ends on the bed and extending transversely of the machine and the inner end of which is in front of the pendent portion of the margin stop when the machine is locked; a key lever mounted on the main frame, having an up-anddoi\-n swinging key arm and an upstanding arm; and a connecting link extending rearward from said upstanding key-lever arm to the outer end of said release lever.

ihe typewriting machine as claimed in claim at, in which the bed is mounted on the main frame to shift up and down to change case, and the universal bar and type bars are mounted on the n ain frame and do not partake of the case-shift movement of the carriage and its bed.

6. in a typewriting machine, the combina tion of a main frame, a key-operated caseihift frame, a platen carriage on the shift 'rame, key-operated type-bars on the main "reme, a universal bar mounted on the main rains for movement by the type-bars during impression strokes of the type-bars, a margin atop traveling with the carriage, escapement mechanism for the carriage including a dog ca rier mounted on the shirt frame for movement by sai universal bar during impression strokes of the type bars in all case positions of the shift frame, a line-locking member mounted on the shift frame for movement by said margin stop into a position for holding the dog carrier against movement by the universal bar, means normally holding said linelocking member out of locking position, a device movably mounted on the shift frame for disengaging said margin stop and linelocking member, a margin-release key lever mounted on the main frame and a connection between said key lever device for actuating said device in all case positions of the shift: frame.

7 In a typewriting machine, a carriage support; a traveling platen carriage mounted on the support; a gib held to the carriage support and engaging over a part of the carriage; initial and final left-hand carriage stops mounted on the carriage for engagement with said gib; means on the carriage for disengaging the initial stop from the gib; a right-hand margin s op on the carriage; a cooperating stop on the-carriage support engageable by the right-hand margin stop; and key-operated means for disengaging the right-hand margin stop from'its cooperating stop.

8. In a typewriting machine, a carriage bed; a platen carriage traveling over said bed; a gib engaging over a part of the can riage and extending under the carriage bed; fastening screws for the gib extending up through the gib and threaded into the car riage bed; a line-locking member pivoted under the carriage bed having two spaced edge POfilOilS alternately engageable with the head of one of said screws to determine the releasing and locking positions of the linelock member; a spring normally urging the line-locking member into releasing position; and a right-hand margin stop on the carriage tor moving the line-locking member into locking position.

9. In a typewriting machine, a carriage bed; a platen carriage traveling over said bed; a gib engaging over a part of the carriage and extending under the carriage bed; fastening screws for the gib extending up through the gib and threaded into the carriag'e beo; a line-locking member pivoted under the carriage bed having two spaced edge portions alternately engageable with the head of one of said screws to determine the releasing and locking positions of the lineloek member; a spring normally urging the line-locking member into releasing position; a right-hand margin stop on the carriage for moving the line-locking member into locking position; and a left-hand margin stop on the carriage engageable With said gib to ar rest the carriage.

10. In a typewriting machine, a main frame; a carriage support; a platen carriage traveling on said support; a right-hand margin stop mounted on the carriage to rock fore and aft of the machine; a line-locking member mounted on the carriage support to swing transversely of the machine; a single stop on the carriage support engageable by said linelocking member to determine both the releasing and locking positions thereof; a spring normally holding the line-locking member in releasing position in the path of traveling movement of the right-hand margin stop; a margin release key lever pivotally mounted intermediate its ends on the main frame to rock up and down; a lever pivotally mounted on the carriage support intermediate its ends and extending transversely of the machine with its inner end in position for engaging and rocking the margin stop when said stop has swung the locking member to locking position; and a link connecting the outer end of said lever with the rear end of the margin release key lever.

11. In a typewriting machine, a main frame; a carriage support; a platen carriage traveling on said support; a right-hand margin stop mounted on the carriage to rock fore and aft of the machine; a line-locking member mounted on the carriage support to swing transversely of the machine; a single stop on the carriage support engageable by said linelocking member to determine both the releasing and locking positions thereof; a spring normally holding the line-locking member in releasing position in the path of traveling movement of the right-hand margin stop; and means for rocking the margin stop out of engagement with the locking member when said member has been actuated by said stop.

12. In a typewriting machine, a carriage support; an escapement dog-rocker; a bracket held to the support and on which the dog-rocker is pivoted; a line-locking member pivotally held to the carriage support independently of the bracket adjacent one end of the memberto swing into and out of a position for blocking operation of the dog rocker; a spring connecting said member with said bracket and normally holding the member out of its blocking position; and a pair of spaced lugs on the bracket cooperating with opposite faces of said member between its pivotiand free end to support and guide the same.

13. In a typewriting machine, a carriage support; a platen carriage movable on said support across the frame; a rockable marginstop bar extending longitudinally of the carriage and journalled thereon; a right-handmargin stop adjustably held to said bar to rock therewith; an escapement for the car- 'iage including a dog rocker mounted to rock about an axis extending transversely of the machine; universal bar mechanism for actuating said dog rocker; a pivoted line'locklocking member movable directly by the margin stop into a machine-locking position in which it is interposed directly in the path of movement of a part of the dog rocker, said member being'pivotally mounted to swing about an up-and-down extending axis; a spring normally urging said pivoted locking member out of locking position; means for iting swinging movements of said locking 1* ember in both directions to maintain the same in the path of travel of the margin stop; a releasing lever extending transversely of the machine and pivoted intermediate its ends to swing about a fixed up-and-down extending axis; and key-operated means connected with one arm of said lever to swing the other-arm of the lever across the path of movement of the margin stop, said last-mentioned lever arm extending in front of the margin stop when the machine is locked.

14. In a typewriting machine, a main frame; key-operated type bars on the main frame; a vibratory universal bar structure ope able directly by the type bars and mounted on the main frame; a platen carriage; a key-operated up-and-down movable caseehift frame upon which the carriage is mounted to travel transversely of the machine; a carriage escapement including a dog rocker mounted on the shift frame; a tappet carried by said universal bar structure, clirectly engageable with said dog rocker to ac tuate the rocker in all case positions of the shift frame a stop mounted on the carriage to travel therewith and to shift transversely of the path of travel of the carriage; a line-locking member mounted on the shift frame for movement relatively thereto, said member being located in the path of travel of the stop and shiftable directly by said stop from an inactive position into a machine-locking position in which it is directly engageable by the rocker to block actuation both of the rocker and universal bar structure; a spring normally holding said member in inactive position; a key lever mounted on the main frame; a releasing member mounted on the shift frame; and means connecting said keyv lever and releasing member for actuating said releasing member in all case positions of the shift frame to di ectly engage and move said stop transversely of its path of travel out of engagement with the line-locking member when the machine is locked.

15. In a typowriting machine, the combination of a main frame; a key-operated caseshift frame; key-operated type bars on the main frame; a universal bar mounted on the main frame for movement directly by the type bars during the latter part of the impression strokes of the type bars; a platen carriage on the shift frame; a margiustop on the carriage; a carriage escapement including a dog rocker mounted on the shift frame and oper able directly by said universal bar in all case positions of the shift frame; a line-locking member mounted on the shift frame for movement directly by said stop from an inactive position into a machine-locking position in which it directly holds the dog rocker against movement by the universal bar to thereby prevent fecding of the carriage by the type bars and making of impressions by types on said type bars; means normally holding the linelocking member in inactive position; a device mounted on the shift frame for disengaging said step and locking member; a margin-release key lever mounted on the main frame; and means connecting said device and key lever for actuating said device from the lever in all ease positions of the shift frame.

16. In a typewriting machine, a main frame; a key-operated up-and-down movable case-shift frame; a platen carriage on the case-shift frame; a rockable margin stop bar extending longitudinally of the carriage and j ournalled thereon; a right-hand-margin stop held to said bar to rock therewith and having a pendent portion; line-locking means operable by said stop; a line-unlocking lever extending transversely of the machine and pivoted intermediate its ends on the shift frame to swing about an up-and-down extending axis; an angular key lever mounted on the main frame, having an up-and-down swinging key arm and an upstanding fore-and-aft swinging arm; and a link connecting said upstanding key lever arm with the outer end of said unlocking lever, the inner end of said lever extending in front of the pendent portion of the margin stop when the machine is locked and being movable rearwardly against said pendent stop portion to rock the stop and bar to a position releasing the line-looking means. I

In testimony whereof we hereunto affix our signatures this 25th day of July 1927.

ALONZO B. ELY. EDWIN L. HARMON.

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