Traffic responsive control system for automatic swinging door

Details Traffic responsive control system for automatic swinging door Traffic responsive control system for automatic swinging door

1984-03-08

1987-10-13

Downey, Kenneth

Movable or removable closures

Radiant energy control

49 31, 250221, 340545, E05F 1520

Patent

active

046989374

ABSTRACT:
An automatic door installation with two traffic sensors mounted on each side of the door adjacent the opposite side edges thereof, each having a reflected energy receiver and a plurality of radiant energy emitters with angularly spaced beam axes to provide broad coverage areas intersecting the traffic path of travel. The emitters of each sensor are selectively activated at different radiant energy levels and/or selectively deactivated to vary the affective coverage area as the door is swung between its closed and open positions.

REFERENCES:
patent: 3852592 (1974-12-01), Scoville et al.
patent: 3857466 (1974-12-01), Berkovitz et al.
patent: 4272921 (1981-06-01), Jorgensen
patent: 4514625 (1985-04-01), Heiland
patent: 4560912 (1985-12-01), Jonsson
patent: 4565029 (1986-01-01), Kornbrekke et al.
Installation Manual, US-021, Vision Pulse, pp. 0984 through 1005.
Multiscan Installation Instructions and Service Guide, Jan., 1974, pp. 1063 throgh 1080.
Multiscan Hook-up and Service, Aug., 1977, pp. 1103 through 1115.

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