Patent GB-1006876-A (GB)
Title: A record sensing device in selective printers and like data processing equipment
IPC: B41J21/16
Filed: 1961-10-03
Abstract: 1,006,876. Sensing record cards. S.C.M. CORPORATION. Oct. 3, 1961 [Oct. 24, 1960], No. 23819/64. Divided out of 1,006,873. Heading G4M. [Also in Division B6] Record controlled input arrangements: sensing perforated cards.-A program device controlled by interchangeable records and associated with movable carriage type data input and output devices comprises a perforated record card support structure 46, Fig. 1, fixed to the rear of, e.g. a typewriter frame 32 and adapted to receive through an opening 68, Fig. 4, a selected one of a plurality of interchangeable perforated record cards 48, and a record card sensing brush assembly 50, which is cantilever supported at its upper end from the rear edge of a support plate 52 and fixed for a reciprocal movement to a carriage 40 of a typewriter 30. The support structure 46 includes a back wall 242 having mounted thereon a commutator board 200, which comprises a metal base-plate 201, Fig. 8, to which is fixed an insulating plate 202, having a printed circuit including a group of horizontally extending, vertically spaced conductor strips 204, equal in number to the number of brushes 140, Fig. 4, of the brush assembly 50. The brush assembly in its movement with the carriage 40 moves longitudinally across the commutator board 200, with the perforated card 48 interposed between the board 200 and brushes 140. A perforation 54 (Fig. 2c, not shown) indicates that when the carriage reaches the column in which the perforation appears the data processing mechanism associated with the typewriter 30 is to perform the function indicated by the row associated with the perforation. In operation the perforated card 48 following insertion into the opening 68 is pressed against the brush assembly 50 by the commutator board 200 which is provided for this purpose with a plurality of guide studs 270, Fig. 9, which project through aligned apertures in the back wall 242. The movement of the commutator board 200 toward the brush assembly is effected by pivotal movement of shaft 280, controlled by knob 84 and geared to a traversely extending shaft 288 carrying cams 292 and 294. A further cam 300 is provided on shaft 280, which is fitted with an interlock including locking plates 340, 344 having locking dogs 356, 362, Fig. 14, co-operating with grooves 338, 336, respectively, to prevent movement of the commutator board 200 toward the brush assembly if the perforated card 48 is inserted in improper orientation, or in the absence of a card. The locking dogs 356, 362 are operated by sensing pins 364, 366 adapted to co-operate with the perforation 62, Fig. 1, in the record card 48. By this arrangement both locking dogs 356, 362 will be out of engagement with grooves 336, 338 when the sensing pin 364 is in alignment with the perforation 62. Keyboard arrangements: electric signal input arrangements.-The typewriter 30, Fig. 1, of the data processing plate input and output device is provided with a conventional keyboard 34 having a supplemental row of control keys 36 arranged in front of a space bar 38. The keyboard is provided with suitable means by which depression of any key on the keyboard will generate a signal for transmission to associated data processing equipment and suitable means for actuating the keys upon receipt of predetermined signals from the associated data processing equipment.