Patent GB-1144081-A (GB)
Title: Improvements in or relating to phototypesetting apparatus
IPC: B41B25/00
Filed: 1966-03-11
Abstract: 1,144,081. Photographic type-composing; strip-perforating. HARRIS-INTERTYPE CORP. 11 March, 1966 [12 April, 1965], No. 10892/66. Heading B6W. Strip-perforating; justifying type.-The keyboard machine is of the general construction described in Specifications 998,714 and 1,075,782 but contains the following additional mechanism. A dial (40, Fig. 1) controls a switch (333, Fig. 9B) to insert a " point size change " signal in the tape, and to set a selector switch (325) to insert a signal indicating the new point size. A lever (42) controls switches (350, 351, 360, 361) to insert a signal for selecting one of two matrix discs in the photographic machine and to select one of two fonts on the selected disc. An end-of-line-code, which may be " accept line " (carriage return key), " reject line " (reject key on auxiliary keyboard), or " non-justify " (key on auxiliary keyboard). These signals control a stepping switch (428, Fig. 14). If the line contains less than ten code units, a stepping switch (400) acts to insert " skip tape codes to make up a desired minimum length between end-of-line signals. The circuit illustrated in Fig. 14 then controls the insertion of five more signals, namely (1) fractions of points, if any, in desired line spacing, under control of a printed circuit switch (445, Fig. 1), (2) full points in line spacing, under control of a second printed circuit switch (455), (3) number of interword spaces to be justified, under control of a counter (125, Fig. 5), (4) piclets available for justifying, under control of the stages LC1-LC32 of a second counter (118), and (5) pieces available for justifying, under control of the stages LC64-LC2048 of the second counter (118). Three " skip tape " signals are then inserted to leave a length of tape available for spacing. Record tape.-The tape, Fig. 4, perforated by the keyboard machine, comprises eight code channels (a-h), channel (h) having a perforation in the case of function signals and not in the case of character signals. The end-of-line code comprises nine code signals, namely, the " end-of-line " signals, the five more signals referred to above, and the three " skip tape " signals. Photographic type-composing.-The general construction of the composing-machine is is disclosed in Specifications 912,202, 998,771, 1,008,146 and 1,073,088, but additional mechanism in disclosed. The space computer (725, Fig. 15) is shown in detail in Fig. 36. An energy absorbing brake is provided in the stepping motor drive for the film carriage, and shown in Fig. 23. The motor control circuits are shown in Fig. 24. The justification computer shown in block form in Fig. 15 and comprising a length memory, length counter, word space counter and word space memory, is shown in detail in Fig. 37. The end-of-line (EOL) controls are shown in detail in Fig. 38. An " accept " signal at the second reader (520) is passed to the code director circuit shown in Fig. 39, and to a manual stop control switch (916). If the switch is open, the machine stops. Otherwise, a signal is passed to a stepping switch (930), thence to the carriage return relay, causing the film carriage to return to normal position for the next line, when a " carriage-at-home " switch opens. Also, the memories LM, WM are reset to zero for the next line. A signal is passed to the leading control stepping motor for line-spacing the film. Signals are passed to the WM memory for the number of interword spaces in the line, and to the LM memory for the remaining space. The stepping switch (930) is reset when the carriage is in home position and the line-spacing operation completed. A pulse generator is energized to feed the tape until the next EOL code reaches the first reader (515). A " multiple justification" signal inhibits line spacing and sets into the WM and LM memories a new set of justification values for the next line, to align it with the previous line. After a "reject." signal, no characters are selected or functions performed until the next EOL signal initiates a further EOL sequence. A "non-justify" signal causes predetermined standard word spaces be inserted by selecting an opaque part of the matrix disc. A " tabulate " code, through circuits shown in Figs. 40 and 24, produces spaces of pica, and a "leader tabulate" code causes dots or dashes to the inserted from the end of the characters in a column to the next column, while tabulating. A " select non-space " code, through a circuit shown in Fig. 41, gives a selected character a space greater than normal, or causes it to be photographed at less than normal width. A " kerning " code causes space to be subtracted after photographing a character. A " cut film " signal results in advancing the film to move the last line out of the carriage, operates a solenoid (1468, Fig. 43) to project a knife into the path of the film, and causes the carriage to move to its furthest-from-home position, severing the film in the process. This may be preceded by several. EOL signals to ensure sufficient advance of the film. Utilizing the combination of machines disclosed, a tape is produced which contains character selection codes and information as to space remainder and number of word together with instructions for font change, point size change, corrections, kerning and leading, but which does not carry data concurring relative or actual character width, such information being produced in the photographic machine. Several tapes can than be produced simultaneously by a plurality of keyboard machines, and utilized in succession at a much higher speed by the photographic machine.