Patent GB-420084-A (GB)
Title: Apparatus for preparing records to be used in controlling type composing machines
IPC: B41B25/00
Filed: 1933-05-24
Abstract: 420,084. Type-making machines. TELETYPE CORPORATION, 1400, Wrightwood Avenue, Chicago, U.S.A.-(Assignees of Krum, H. L. ; 85, Robsart Road, Kenilworth, Illinois, Reiber, A. H. ; 6712, North Artesian Avenue, and Goetz, M. T. ; 4630, Beacon Street, both in Chicago, both in U.S.A.) May 24, 1933, Nos. 14993, 14994, and 14995. Convention dates, May 26, 1932, June 2, 1932, and June 4, 1932. [Class 100 (iii)] Strip-perforating machines; keyboards; justifying type.-Relates to machines for perforating recordstrips for controlling composing- machines, and, more particularly, line-casting machines employing expansible spacebands. Selecting and punching mechanism. The key-levers 26, Fig. 2, of the machine, which is of entirely mechanical construction, act on pairs of code-bars 35, 36, which are supported on T-shaped rocker-arms 40, 41, Fig. 3, the bars of each pair being notched in a complementary manner, so that, when one bar is depressed, the other rises. The rockerarms act through bars 46 and levers 49 on punch-interference bars 70, Fig. 12. The key-levers also act on pairs of bars 33, 34, which are also supported on T-shaped rockerarms and serve to operate the counting- mechanism. The bars 33, 34 are not notched, but are operated by lugs 110, 111 on code-bars 106, which are mounted to slide on the keylevers. The bars 106 are pivoted at their rear ends to a rocker-member 108, which can be adjusted by means of shift-keys to vary the action on the counting-mechanism according as upper or lower case characters are being composed. The rocker-member is held in either position by a detent 120, and a coloured indicator shows the position occupied. The punches 71, Fig. 12, are operated by the interference-bars 70 and a hammer 74, which is actuated by a lever 75 and a cam 78. The lever 75 is mounted on an eccentric shaft 86, which can be rotated by means of a handle to disengage the lever from its cam. Counting - mechanism. The key - operated bars 33, 34 rock Y-shaped levers 59, which control the setting of a series of notched discs 146, Fig. 6. Recesses in the discs are engaged by arms on a set of T-shaped transfer-levers 147, which are carried by a lever 149 and are brought into engagement with the levers 59 by a cam 153. According to the setting of the levers 59, the discs 146 are rocked in one direction or the other, and their adjustment permits one of a series of spring-pressed rods 156 to move into a set of aligned notches in the discs, and to move a stop-member 166, Fig. 5, connected therewith radially inwards. Cooperating with the stop-members 166 are a series of selecting-plates 188, axially slidable in a barrel 192 secured on a shaft 186, which constantly tends to rotate under the action of a friction clutch 177 connecting it to a driving- shaft 183. One of the plates 188, always in the same position, is projected by a camoperated finger, and the previously projected plate is withdrawn by a flanged collar 189 operated by a cam, so that the barrel rotates until the projected selecting-plate 188 encounters the projected stop-member 166. Indicating-mechanism. The rotation of the shaft 186 is communicated by worm-gearing to a pointer moving over a scale to indicate the progress of the line. At the end of a line, the shaft of the pointer is moved axially by a cam, which is brought into action by the " elevator " key-lever, to disengage the pointer from its driving-mechanism, and to permit it to be returned to initial position bv a spring. The initial position of the pointer is determined by a stop adjustable in an arcual slot in the scale. The stop is carried on a pivoted arm, which can be turned through an angle of about 180‹ to increase the range of adjustment. The justifiability of the composed line is indicated by a pair of pointers 278, 279, Fig. 18, which are differentially operated at each depression of the space-key, the distance between the pointers indicating the amount of expansibility of the spacebands in the line. The pointers are operated from a ratchet-segment 286 through separate pairs of toothed segments having different gear ratios. At each depression of the space-key, the segment 286 is advanced a step against spring pressure by a pawl 289 pivoted to a cam-operated slide 291. The space-key lever tilts a latch 304 and thereby releases a lever 305, which, under spring action, lifts the pawl 289 into engagement with the segment. The lever 305, which is mounted on the slide 291, is lowered again by meeting a fixed projection 307, and the pawl is then retracted by a spring. A detent 293 retains the segment 286, and is tripped at the end of the line to permit the pointers to return to initial position. When the line is of justifiable length, as indicated by the meeting of the length-of - line pointer with the pointer 279, a signal-lamp is lighted. The circuit of the lamp is closed by a pivoted U-shaped member 316, Fig. 17, which carries a pivoted bar 320 having at its ends rollers 321, 322, which are engaged by cams 323, 324 connected to the line-pointer and the pointer 279 respectively. Operating-mechanism. The cam-shaft, by which the various operations are effected, is initially driven from a constantly running shaft through a friction clutch, which is permitted to act when a latch is withdrawn by the action of a universal bar. After a partial rotation, a cam co-operating with a stationary member allows a grab-clutch to close, so that the cam-shaft is positively driven for the remainder of a half-revolution. A second clutch, controlled by the " elevator " keylever, brings into action the cams for effecting the return of the pointers of the indicating- mechanism.