Patent GB-910782-A (GB)
Title: Improvements relating to type-composing machine
Inventor: MOYROUD LOUIS MARIUS
IPC: B41B27/20
Filed: 1959-04-17
Abstract: 910,782. Justifying type; strip-perforating machines. INTERNATIONAL PHOTON CORPORATION. April 4, 1960 [April 17, 1959], No. 13218/59. Drawings to Specification. Class 100 (3). A type-composing machine includes an electrically-operated memory for storing coded character identity information, the memory comprising two crossed sets of leads having a memory element at each point of intersection, each element being electrically driven from a first to a second state by co-incident electrical signals on the two leads extending to the associated intersection, the leads of the first set corresponding sequentially to character positions in the line and being sequentially energized during a line storage operation, and the leads of the second set being energized, simultaneously with the energization of each lead of the first set, in accordance with a code combination significant of the identity of the required character at the particular character position corresponding with the lead of the first set simultaneously energized. There are fifteen " X " wires of the first series and one hundred " Y " wires of the second series. The typewriter initiates character width and character identification signals as described in Specification 807,752, which are delivered through a distributer comprising a series of relays to the selected " X " wires under the control of timing circuits, and also delivers pulses to a bush connected to the typewriter carriage which contacts a series of terminals in a printed circuit, connected to the "Y" wires. The magnetic cores are bi-stable, and after the end of a line, the arrangement of the cores as between their two magnetic states forms a stored memory. Corrections can be made by operating the back-space key, when a double strength reverse pulse is passed through the " Y " wire, which restores all triggered cores in the column, also causing pulses to be produced on the corresponding "X" wires to subtract the width of the erased character from the justification counter to which the character widths are also transmitted. Operation of the carriage return key returns the carriage and brush to their starting positions and initiates the reading out of the previously stored line through a read distributer controlled by timing circuits. Interlock circuits are provided to prevent overlap of read and write operations. Beading proceeds as a result of sending pulses in succession on the " Y " wires, which pulses are distributed by a relay circuitry. The timing circuits are controlled by cams. The reading of a line can proceed at the same time as the writing of the next. line by using an interlock brush interlocked with and in advance of the write brush. If the read circuit stops to await completion of certain machine functions, as is common, the typist may catch up with the read distributer, in which case the interlock brush engages a terminal receiving pulses from the read pulse generator, and locks the keyboard, until the read circuit has moved several steps ahead. In another form, the typewriter is replaced by a tape-reader for reading a tape previously prepared on a typewriter or punching mechanism having no width identifying means. The typewriter carriage is replaced by a write distributer. The tapereader transmits the identity and width signals to the " X " wires and the width information to a justification counter, and stops when justification is desirable, as described in Specification 910,783. The read distributer of the memory works two steps in advance of the write distributer, under control of an interlock circuit. The end-of-line pulse from the tape resets to zero the write distributer, and the end-ofline signal read by the read distributer resets the latter, the tape reader remaining at rest until the read distributer has re-started and moved two steps. In another form, two memories are used, used alternatively for writing and reading by means of a relay. When one memory is set for writing, the "Y"  wires are energized in turn through one of two brushes. Two " X" wires are provided for each row of cores, one for transcription and the other for corrections, one or the other series of " X " wires being selected by a correction relay. The individual "X" " wires are selected by relays responsive to the keyboard. Each pulse is sent through the " Y " wire and any selected " X " wires in series. While one memory is being filled by operation of the keyboard, the other memory is being read with the use of a decoder selecting the " Y " wires in succession. A character can be corrected by using the backspace key, which moves the platen back one step, operates the correction relay to connect the width " X " wires to reading circuits, and sends a pulse on the " Y " wire to erase the stored information in the column. The information read from the memory in all the forms described may be transmitted to a photographic type-composing machine, a stripperforator, or a line-casting machine. Specifications 691,738, 857,791, 902,157 and 904,684 also are referred to.