Traffic responsive control system for automatically operated doo

Details Traffic responsive control system for automatically operated doo Traffic responsive control system for automatically operated doo

1978-12-21

1981-06-16

Downey, Kenneth

Movable or removable closures

Time controlled

Predetermined delay governs start of closure movement

49 31, 49 25, E05F 1520

Patent

active

042729211

ABSTRACT:
A traffic responsive control system for controlling one-way traffic through a door in which the door opening means is disabled when power is initially applied to the control system while permitting the door opening means to respond to a door opening signal on the traffic side of the door immediately after termination of a safety signal on the safety side of the door.

REFERENCES:
patent: 3147000 (1964-09-01), Pinckaers
patent: 3742434 (1973-06-01), Leyde et al.

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