Fire and smoke protection device for use in buildings

Details Fire and smoke protection device for use in buildings Fire and smoke protection device for use in buildings

1984-07-06

1985-09-03

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

340542, 340286R, 340628, 340584, 49 31, 116 12, 200 6164, G08B 2300, E05B 4506

Patent

active

045395551

ABSTRACT:
An anti-security control for unlocking the normally locked door which separates the corridor side and the stairwell side of buildings, such as hotels. The anti-security control is preferably adapted for use with and draws power from any conventional-type of smoke and fire detection and alarm system. When the detection and alarm system senses the existence of a dangerous level of smoke or fire, current is shunted to a solenoid which operates to unbolt the normally locked separation door. A depressible button may be operatively affixed on the corridor side of the door to provide access from corridor to the stairwell regardless of whether a smoke or fire condition is sensed by the detection system.

REFERENCES:
patent: 4007456 (1977-02-01), Paige et al.
patent: 4048630 (1977-09-01), Deming et al.
patent: 4074269 (1978-02-01), Hartley
patent: 4197675 (1980-04-01), Kelly

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