Patent GB-405267-A (GB)
Title: Improvements in or relating to type setting type-casting and like machines
IPC: B41B25/00
Filed: 1932-07-26
Abstract: 405,267. Type-making machines; type-writers. ARMSTRONG, J. J. V., 12, Church Street, Liverpool.-(Johnson Corporation, C. B. ; Charlotte, North Carolina, U.S.A.) July 26, 1932, No. 21004. [Classes 100 (iii) and 100 (iv).] Strip - perforating machines ;justifying type; relay type-lever actions carriagereturning mechanism linelocking devices ; types.-A device for preparing a control-sheet for operating type setting, casting, and like machines, either directly or by transmitting impulses over a wire or by wireless to a distant point, comprises a typewriter of which the type-bars are adapted to print, in addition to ordinary characters, code characteristics of the kind shown in Fig. 47, which act as photo-electric cell controls. Each line of characters is formed with a predetermined margin at the starting end, and means are provided for printing a character therein, after the printing of the line, to indicate extra space-members. An indicating-device shows the space occupied by the characters in the line, the space remaining to be filled, and also the expansibility of the space-bands contained in the line. Upper and lower case characters and numerals are distinguished by special code signals printed before them. (1) A typewriter of conventional form is employed, and is provided with a main driving-shaft 19, Fig. 2, driven by a motor 22. The shaft 19 is connected through gearing and a clutch 34 with a cam-shaft 27, the clutch being permitted to close for one revolution upon the depression of a carriage-return key at the end of the line. A cam 38 on the shaft 27 acts on the usual escapement-mechanism to allow one letter-space at the beginning of the line. This space may be left blank, but when the operator sees that additional space is necessary to fill the line, he depresses a special key, which causes the operation by the cam 38 of a special type-bar, which prints an extraspace symbol at the beginning of the line. This is effected after the carriage has been returned and before line-spacing is performed. A second cam 75 on the shaft 27 acts through levers 78, 82 to return the typewriter carriage. A third cam 100 acts through a lever 102 on a sliding push-rod 107, the end of which is adapted to engage the free end of a lever 110 mounted on the carriage, and to impart a line-space movement to the platen by means of ratchet-mechanism. The platen has pin-wheels at its ends, to engage marginal holes in the control-sheet and prevent slipping. Spring members 137 press the sheet against the wheels. A spring-pressed shield-member 140, slotted to clear the pin-wheels, projects downwards below the platen to guide the sheet during insertion. A second cam-shaft 172 is adapted to be connected to the driving-shaft 19 by a clutch 170, which is caused to close for one revolution, after each depression of a character-key, by a universal bar operated by all the key-levers. A cam 177 on the shaft 172 moves a sliding bar 184, Fig. 31, having inclined supporting portions 187, which cause it to rise beneath the key-levers and lock them against depression until the shaft has completed a revolution, so as to prevent the operator from writing too fast. Other cams on the shaft 172 operate the line-measuring mechanism. (2) The length of the composed line in ems is indicated on a scale 397, Fig. 33, by a pointer 392 carried by a metallic tape 366, which is fed forwards step-by-step against the pull of a spring as the line is composed. The scale also has graduations 399 indicating the expansibility of the space-bands, so that, by counting the number of spaces in the line, the operator can determine the amount of space which they can be expanded to occupy. A pointer 403 indicates the length of the completed line. The tape 366 is drawn forwards by a spacemeasuring mechanism operated by the keys. Each key-lever operates one of a series of sliding bars 422, Fig. 19, having projections adapted to enter notches in a set of six transversely sliding bars 435 and to arrest their movement. The width of the notches in the bars 435 varies according to the size of the characters. The bars are operated in pairs, the movement of one bar of each pair being idle, and they are moved by an arm 237, Fig. 31, projecting from a member 236, which slides on a squared shaft 235, the shaft being rocked by a cam on the shaft 172 acting through a spring. The three pairs of bars 435 correspond to lower-case characters, upper-case characters, and numerals respectively, and the member 236 is moved along its shaft, so as to engage the appropriate pair of bars, by either of two shift-keys, which also effect the printing of a shift-symbol on the control-sheet. The shaft 235 is thus rocked to a variable extent at each key depression, and its movement is transmitted to the tape 366; that operates the indicator, by means of two pairs of grippers, one of which is movable and is operated by an arm 327 on the shaft 236. (3) In a modification, the type-bars are power-operated through levers 468, 467, Fig. 43, provided with depending pivoted dogs 465, which can be moved into the path of a common actuating-bar 475. The dogs 465 are operated from the key-levers 460 through sliding bars 463, which co-operate with the transverse sliding bars 435 of the measuring- mechanism.