Timed smoke detection

Details Timed smoke detection Timed smoke detection

1981-10-01

1983-05-10

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

With particular system function

3403096, 340628, G08B 2300, G08B 1710

Patent

active

043832512

ABSTRACT:
A smoke detector includes a sensing unit which has a power terminal adapted to receive electrical energy. A timing device in the smoke detector includes a switch, a timer and a manually operable device. The switch is coupled to the power terminal for interrupting current thereat. The timer can operate the switch to cause interruption of current at the power terminal for a predetermined interval. The manually operable device can actuate the timing means and start its predetermined interval.

REFERENCES:
patent: 4105996 (1978-08-01), Shimizu
patent: 4313110 (1982-01-01), Subulak et al.

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