Improvements in and relating to tape readers
Номер патента: GB1060291A
Опубликовано: 01-03-1967
Автор(ы): Lawrence Garde
Принадлежит: Associated Automation Ltd
Опубликовано: 01-03-1967
Автор(ы): Lawrence Garde
Принадлежит: Associated Automation Ltd
Реферат: 1,060,291. Feeding record tapes. ASSOCIATED AUTOMATION Ltd. Feb. 5, 1963 [Nov. 6, 1961], No. 39594/61. Heading G5R. [Also in Divisions F2 and H3] A solenoid in the drive circuit of a tapereader is operated by a transistor and in order to make the operation or release more rapid a choke is connected to the solenoid to provide an aiding or opposing e.m.f. during switching. Thus, in Fig. 2, TR2 is normally conducting and current flows in a choke L. To operate the brake solenoid B, TR2 is cut-off and TR1 rendered conducting. TR1 takes less current than TR2 so that the decreasing current produces an e.m.f. across the choke such as to speed the operation of the solenoid. Similarly when the conducting states of the transistors are again reversed the increase in current in the choke produces an e.m.f. in the opposite direction to speed its restoration of the solenoid. In Fig. 2 (not shown) driving transistors (TR4), (TR5) feed TR1 and TR2 to operate the brake and Zener diodes are connected across TR1 and TR2 to limit the voltage thereacross. In addition a clutch is operated by a single transistor (TR3) but could alternatively be connected in a circuit similar to the brake solenoid circuit. Control of the circuit is effected by photoelectric apparatus in response to light passing through sprocket holes of the tape (Figs. 5 and 6, not shown).
Improvements in and relating to a sheet orientation detection system
Номер патента: IE20110196U1. Автор: Carmody Francis,Scully Edward,Oakley Kenneth,Mac Namara Damien. Владелец: Limerick Institute Of Technology. Дата публикации: 2011-11-09.