Patent GB-703870-A (GB)
Title: Control apparatus for type linecasting and composing machines
IPC: B41B27/10
Filed: 1951-08-24
Abstract: 703,870. Type-bar-making machines. TELETY PESETTER CORPORATION. Aug. 24, 1951 [Sept. 12, 1950], No. 19988/51. Class 100 (3) Driving-mechanism. - In a control apparatus for a type linecasting and composing machine, code signals representing the successive printing characters or spacing elements to be set up by the machine are recorded in a tape which is advanced past a recordreader device whereby a plurality of individually settable members serving to control the operation of the machine are variably positioned in accordance with the recorded code signals, and a tape-feed arresting mechanism is provided which is responsive to the setting of the individually settable members to delay the advance of the tape for a predetermined interval of time whenever the record-reader device encounters the second of two successive identical recorded code signals the arrangement being such that the individually settable members are prevented from controlling the operation of the machine in response to the said second signal until after a corresponding time interval has elapsed thus ensuring that the speed of the control apparatus does not exceed the speed of the type linecasting and composing machine in responding to successive identical code signals. Perforations in the tape 30, Fig. 1, are sensed by feeler levers 12 which through transfer levers 37 cause individually settable members 38 to be set in a leftward position where a perforation is sensed and to the right where it is not; there being laterally arranged members 12, 37, 38 corresponding to each possible position of a perforation. In each cycle of operation, cams on a shaft 22 cause feed of the tape past sensing position by means of the lever 26 and pawl 31, intermittent withdrawal of the levers 12 by a bail 17, and upward movement of the members 38 through a lever 102, also rocking of an operating lever 79. There is also provided a transfer setting lever 47, a transfer lever 49 co-operating therewith, and a connector bar 51 similar to the members 38 and normally in a leftward position. The lever 47 is operated only by the arm 108 of the lever 79. The members 38 operate the usual code bars 46 and the bar 51 operates a blocking bar 52. Each member 38 has a saw tooth projection 55, while the bar 51 has a projection 550 carried on a yieldable pawl member 61. When a signal is sensed which differs from the preceding one, one or more of the members 38 is moved ;to left or right, whereupon the projection 55 rocks a bail 71 and a blocking lever 72, a shoulder 77 on which prevents anticlockwise rocking of the lever 79, and the mechanism operates normally. The lever 79 is then rocked clockwise and through an arm 89 restores the lever 72. If an identical signal is sensed, no movement of the members 38, 71, 72 takes place, and the lever 79 rocks to operate the lever 47 and move an abutment 108' thereof clear of the lever 47, while an arm 92 of the lever 79 moves the bar 51 to the right, thereby causing an arm 99 to block the lever 26 and prevent feeding of the tape. As the bar 51 moves, its projection 550 has no effect on the lever 72 owing to the yielding of the member 61. Owing to the movement of the blocking bar 52, the casting member does not operate. On the next cycle, the same (second identical) signal is again sensed, and the lever 47 acts on the lever 49 to move the bar 51 to the left, whereupon the projection 550 rocks the lever 72 and normal operation takes place. In order to prevent delay in the case of repetitions of particular signals where it is unnecessary, a further blocking lever 118 is provided, associated with an arm 124 pivoted to a member 125 carrying bail rods 126, 127 resting against the bottom edges of the members 38, 51. When such a particular signal is sensed, a series of notches in the members 38, 51 come into alignment to receive the rod 126 or 127, whereupon the lever 118 rocks to prevent movement of the lever 79. In another form, Fig. 2, the blocking lever 130 is actuated by the raising of a plate 134 when one of rods 137 carrying rollers 139 moves into such a series of aligned notches. Specifications 415,798 and 449,088 and U.S.A. Specification 2,104,030 are referred to.