Fire detector

Details Fire detector Fire detector

1975-12-17

1976-12-21

Moose, Harry

Electrical transmission or interconnection systems

Switching systems

Condition responsive

340227R, 340228R, H01H 3732

Patent

active

039990796

ABSTRACT:
The fire detector in which only an increasing component of the voltage produced by a transducer is applied to a timing-circuit and a voltage detected by said transducer is converted in waveform into sawtooth wave form which increases in accordance with the increasing component of said voltage by short-circuiting a capacitor comprising said timing circuit in a predetermined time interval and then the converted voltage is applied to a constant voltage circuit.

REFERENCES:
patent: 2944152 (1960-07-01), Johnson et al.
patent: 3045183 (1962-07-01), Laczko
patent: 3621262 (1971-11-01), Lecuyer
patent: 3872449 (1975-03-01), Scheidweiler

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