Patent GB-1075782-A (GB)
Title: Improvements in or relating to typesetting machines
IPC: B41B25/00
Filed: 1964-07-08
Abstract: 1,075,782. Strip perforating machines; justifying type. HARRIS-INTERTYPE CORPORATION. July 8, 1964 [July 8, 1963], No. 28176/64. Heading B6W. In apparatus for preparing a perforated record tape to control photographic typesetting machines, of the general construction described in Specification 989,626, a tabulator control is provided. This control includes a ten by ten circuit matrix 35, Fig. 3, having its horizontal and vertical co-ordinate leads coupled directly with the tens and units outputs of a digital counter comprising a " units " counter 245 and a " tens " counter 250 which counters indicate in half picas the accumulated line length. Each cross point of the circuit matrix 35 represents a particular point in a line length, plug-in units, in the form of AND gates (Fig. 7), being inserted at selected cross points corresponding to the required " Tab " stop positions. Depressing " Tab " key 225, Fig. 3 extinguishes a control thyratron V4 and causes a pulse generator 227 to transmit pulses through its output line 232 to the line length accumulator 118. Accumulator 118 also receives pulses from the character spaced computer system described in Specification 989,626. Each pulse into the accumulator is equivalent to 1/64th of a pica. The output stage LC8 of the accumulator is coupled through an amplifier 233 to the input of an auxiliary one-quarter pica counter 235. The pulses available from the output of 235, which is equivalent to one half of a pica, are applied to a punch matrix gate 240, which is only open when the thyratron V4 is extinguished. When the gate is open, each pulse signals the tape perforator to punch a " Tab " code for every half of a pica during a tabulating cycle. The pulses available from 235 are also applied via a kern correct relay switches and phasing networks to the input of the digital counter comprising decimal counters 245 and 250. When the output of the decimal counters coincides with the amount predetermined by the " Tab " stop plug in the ten by ten circuit matrix 35, a positive pulse is applied to the grid of the thyratron V4 from the cathode follower circuit 260, which fires the thyratron and shuts down the pulse generator 227 and the punch matrix gate 240 until the next tabulating cycle commences. Depressing the kern or correct keys has the effect of energizing the kern correct relay to reverse the counting procedure in the character space computer system described in Specification 989,626, which includes the line length accumulator 118, and reverses the counting in the decimal counters 245 and 250. 1,075,817. Selective printers. SPERRY RAND CORPORATION. March 30, 1965 [April 1, 1964], No. 13507/65. Heading B6F. An electrographic selective printing apparatus comprises a matrix head 34, Fig. 1, slidably mounted on a rod 36 for movement along the printing line, and carrying a plurality of styli electrodes 42, Fig. 2, arranged in configuration of the numeral " 8 " and electrically insulated from each other. The styli comprise pins 44, Fig. 3, spring-biased into continuous contact with the record material 30 which is supported on a platen roller 32 and the styli are associated electrically in pairs to cause a current pulse to flow from one pin 44 (P1) along the chemically treated, electrically conductive surface of the record material 30 to another pin 44 (P2) associated therewith, whereby the current flow causes the chemically treated record medium 30 to change colour at the points in contact with said pins. Selected characters are printed by selective combination of the eleetrically associated pairs of pins, the selection being effected by driving circuits PC1-2 . . . PC13- 14, Fig. 4, one for each pair of pins and a print initiating circuit common to all of the individual driving circuits which generates and applies print initiating binary signals simultaneously to all the driving circuits, said driving circuits being conditioned by biasing potentials so as to be selectively responsive to the print initiating signals to energize the styli electrodes 42 associated therewith. In a modification all pins are energized individually and the platen :roller is grounded.