Ionization fire-signal device

Details Ionization fire-signal device Ionization fire-signal device

1978-02-17

1980-07-15

Anagnos, Larry N.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250385, 307308, 307363, 340629, G08B 1710

Patent

active

042130468

ABSTRACT:
An ionization fire-signal device with an ionized measuring chamber, a reference element connected in series with the reference chamber, an amplifier stage controlled by the electric potential of the connection point of the measuring chamber and the reference element and comprising a field effect transistor, and a signal circuit controlled by the amplifier stage and comprising another transistor. A bistable behavior of the ionization fire-signal device is achieved by a positive signal feedback from the signal circuit to the substrate of the field effect transistor.

REFERENCES:
patent: 3559196 (1971-01-01), Scheidweiler
patent: 3603949 (1971-09-01), Walthard
patent: 3728706 (1973-04-01), Tipton et al.
patent: 3778800 (1973-12-01), Blackwell et al.
patent: 3821734 (1974-06-01), Herrliberg et al.
patent: 3909813 (1975-09-01), Scheidweiler et al.
patent: 3952294 (1976-04-01), Emerson et al.
patent: 4037106 (1977-07-01), Scheidweiler et al.
patent: 4075487 (1978-02-01), Larsen
patent: 4083037 (1978-04-01), Larsen
patent: 4138670 (1979-02-01), Schneider et al.

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