Automatic door driving system

Details Automatic door driving system Automatic door driving system

1988-08-03

1990-02-27

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

318441, H02J 700, H02P 100

Patent

active

049048805

ABSTRACT:
An automatic door driving system is disclosed, which can electrically perform automatic door opening/closing operation in case of emergency, i.e., occurrence of a fire, or power stoppage and effect automatic door opening/closing control according to the prevailing situation. In the driving system, an AC power source and battery power source are selectively connected through an emergency battery unit to an automatic door controller for controlling an automatic door drive motor. Normally, electric power is supplied from the AC power source to the automatic door controller, while the battery power source is charged from the AC power source. At the time of power stoppage, electric power is supplied from the battery power source to the automatic door controller.

REFERENCES:
patent: 4088937 (1978-05-01), Uchida et al.
patent: 4129811 (1978-12-01), Pearson
patent: 4490624 (1984-12-01), Luker
patent: 4536747 (1985-08-01), Jensen
patent: 4738052 (1988-04-01), Yoshida

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