E - Fixed Constructions – 05 – F
Patent
E - Fixed Constructions
05
F
342/12, 342/40
E05F 15/20 (2006.01) H02H 7/085 (2006.01) E05F 15/00 (2006.01)
Patent
CA 1153087
ABSTRACT OF THE DISCLOSURE An automatic door operation control apparatus id disclosed which comprises a door operating device, a driving device for opening and closing the door, a condition detector for detecting a condition under which the movement of the door by the driving device is required to be discontinued, and a main control device for issuing a driving command to the driving device to actuate the same as required in response to a condition detection signal from the condition detector. The apparatus further comprises an auxiliary control device for stopping the operation of the driving device in the event that the main control device fails to issue a command to the driving device to stop the door move- ment within a predetermined length of time in response to the condition detection signal from the condition detector.
373902
Matsuoka Shigeru
Suzuki Mitsuo
Tokunaga Takeshi
Yamauchi Koji
Yonekura Seiji
Hitachi Ltd.
Kirby Eades Gale Baker
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