Composite detector

Details Composite detector Composite detector

1986-07-03

1988-02-16

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340508, 340506, 340517, 340518, 340511, 34087021, G08B 1900

Patent

active

047258209

ABSTRACT:
A composite detector includes a plurality of sensors of the same or different types, a plurality of analog switches connected to outputs of the plurality of sensors, and an operation circuit, such as an operational amplifier. The sensors detect physical phenomena such as heat, smoke and gas according to different principles of detection, and output analog detection signals. The analog switches are controlled by a selector operated with a control signal from a central monitor or magnitudes of outputs from the plurality of sensors. The operation circuit calculates outputs from the plurality of analog switches.

REFERENCES:
patent: 4161727 (1979-07-01), Thilo et al.
patent: 4283717 (1981-08-01), Caldwell et al.
patent: 4339746 (1982-07-01), Ulicki et al.
patent: 4414539 (1983-11-01), Armer
patent: 4524349 (1985-06-01), Hyatt
patent: 4626831 (1986-12-01), Engel

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