Patent GB-235573-A (GB)
Title: Telegraph typewriters
IPC: H04L17/22
Filed: 1924-06-23
Abstract: 235,573. Kleinschmidt Electric Co., Inc., (Assignees of Kleinschmidt, E.). July 5, 1923, [Convention date]. Letter-spacing mechanism; electric driving- mechanism. - The paper carriage of a typeprinting telegraph is driven by a continuouslyrunning motor and is controlled for letter-spacing by means of mechanism arranged so that the movement of the paper carriage is practically continuous, interruption of the movement. occurring only during impression of the types; the letter-spacing mechanism is associated with carriage-returning and tabulating mechanisms. The carriage, feed-rack 235, Fig. 2, engages a pinion 182 on a shaft 183 geared to a shaft 150 provided with a loose worm-gear 149 which is held by a spring 152 in frictional engagement with a collar 151 on the shaft, and is driven continuously by a worm 148 on the shaft 105 of an electromotor. The shafts 183, 150 are geared together by pinions 180, 179, the pinion 180 having a clutch-member 345 engaging a clutch-member 346. An escapement wheel 156 on the shaft 150 co-operates with teeth 159, 160, Fig. 5, on an arm 158 which rocks on a shaft 161 and is held by a spring 165 in engagement with a pin 164 on an arm 163 secured to the shaft. A universal bail 167. having the front edge 169 in the path of surfaces 170 on the type-levers, is supported at the rear by arms 166 on the shaft 161. The tooth 159 normally engages a tooth 157 of the escapement wheel. When the universal bail is engaged by a type-lever, the escapement arm 158 is depressed, the tooth 159 releases the tooth 157, and the escapement wheel turns slightly until the tooth 157 is caught by the tooth 160. On return of the type-lever, under control of a cam 91, a spring returns the universal bail, the tooth 160 is released from the tooth 157, and the escapement wheel turns until the following tooth 157 is caught by the tooth 159. To absorb the shock of starting and stopping the paper carriage, the pinion 182 may be mounted loosely on the shaft 183 and be provided with a pin which passes through a gap in a collar fast on the shaft and is connected to the collar by a spring. The pinion 182 mav be seated on a fast pinion 181 gearing with a ball-guide rack 238. Specification 218,643 is referred to. Carriage -returning mechanism. - During the letter-spacing movement of the paper carriage, a spring 357, Fig. 9, is wound, and when the carriage-return signal is received the pinion 180 on the shaft 183 is raised to separate the clutchmembers 345, 346 and thereby permit the spring to return the paper carriage. The spring is connected at the ends to the shaft and a sleeve 349 which is prevented from rotating by a pivoted detent 354 engaging a ratchet-wheel 352. The upper end of the shaft is mounted in a ball bearing 361 in a hanger 362, and the sleeve has a collar mounted in the hanger. When the carriagereturn signal is received, a bar 108 rocks an arm 368 on a shaft 364, and arms 363 on the shaft raise the pinion 180. During carriage-return, the pinion is retained in elevated position by means of a latch 373 connected to an arm 369 on the shaft 364 and having a notch 379 adapted to catch on a plate 374 when the latch is raised. When the carriage has been returned, a, pin 377 thereon releases the latch and permits the parts to return to normal position. A dash-pot is provided for arresting the carriage. Line-spacing mechanism. - As described in Specification 218,643, this mechanism is operated by linkage connected to the bar 108 controlled by the carriage-return signal, or to a separate signal-controlled bar. Tabulating - mechanism; carriage - releasing arrangeanents. - A notched plate 325, Fig. 5, carrying adjustable tabulating-stops 342, is secured to arms 327 on a sleeve 326 which can rock on a shaft 247 and has an arm 328 normally abutting on a pivoted stop 331. The tabulating- signal controls a bar 108 connected to a link 338 having an incline 337 for engaging a pin 336 on a finger 355 on the escapement arm 163. When the tabulating-signal is received, the escapement arm is raised above the escapement wheel 156 to release the carriage, and the finger 335 lifts the stop 331 and permits a spring 329 to rock the arm 328 and plate 325 and move the tabulating- stops into the path of a co-operating carriagestop 344. A lug on the finger 335 then engages a lug 345 on the arm 328 and retains the members in displaced position until the stop 344 engages a tabulating-stop, whereupon inclines on these stops co-operate to rock the arm 328 and plata 325, thereby permitting the escapement arm to descend and arrest the carriage. The stop 344 is secured to the end of the ball-guide. rack 238.