Security system for automatic door

Details Security system for automatic door Security system for automatic door

1998-07-03

2000-04-04

Ro, Bentsu

Electricity: motive power systems

Automatic and/or with time-delay means

Time or with time-delay means

318467, 49 29, 388909, 388921, E05F 1520

Patent

active

06046562&

ABSTRACT:
A system and device for insuring the integrity of an automatic door has a sensor to determine the status of the door with respect to a predetermined position and a programable actuator which provides a positive signal for automatically moving the door to the predetermined position when the programmable actuator is activated and the sensor indicates that the door is at other than the predetermined position. Preferably the programmable actuator is a timer and the predetermined position is closed. The timer can be remotely programmable. The actuator can also be triggered by a sensor of an event such as darkness.

REFERENCES:
patent: 3510982 (1970-05-01), Purdy
patent: 3783556 (1974-01-01), Cook
patent: 4463292 (1984-07-01), Engelmann
patent: 4638433 (1987-01-01), Schindler
patent: 5027553 (1991-07-01), Vergara
patent: 5243784 (1993-09-01), Whitaker et al.
patent: 5247232 (1993-09-01), Lin
patent: 5357183 (1994-10-01), Lin
patent: 5510686 (1996-04-01), Collier
patent: 5673514 (1997-10-01), McKeon
patent: 5752343 (1998-05-01), Quintus

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