Smoke alarm controlled unlocking apparatus for window bars

Details Smoke alarm controlled unlocking apparatus for window bars Smoke alarm controlled unlocking apparatus for window bars

1987-11-16

1989-06-06

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

307 66, 340584, 340628, 361170, G08B 1712

Patent

active

048375608

ABSTRACT:
An apparatus is provided for automatically unlocking the guard bars on a window in response to the output signal of a fire detection device. In a preferred embodiment a smoke alarm having a pair of relay-controlled contacts is used in conjunction with a solenoid arrangement to unlock the window bars. Power to the smoke detector and the solenoid circuit is supplied by a rechargeable battery, so that in the event of power failure the automatic window bar unlocking apparatus continues to operate.

REFERENCES:
patent: 4539555 (1985-09-01), Tefka
patent: 4540208 (1985-09-01), Logan, Jr. et al.
patent: 4671362 (1987-06-01), Odashima
patent: 4685316 (1987-08-01), Hicks et al.
patent: 4689610 (1987-08-01), Dietrich
patent: 4706760 (1987-11-01), Arai et al.

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