Selective ultraviolet signal amplifier circuit

Details Selective ultraviolet signal amplifier circuit Selective ultraviolet signal amplifier circuit

1980-10-23

1982-05-04

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

340578, H01H 4724

Patent

active

043285279

ABSTRACT:
A flame detection circuit means that is responsive to an ultraviolet responsive tube is provided with a safety circuit. The safety circuit encompasses a pulse responsive circuit that is responsive to the characteristic conduction pattern of an ultraviolet responsive type of tube and will not respond to a shunt resistance. The circuit relies on the normal conductivity of a shorting field effect transistor that must be gated into a nonconductive state for an output means to be activated.

REFERENCES:
patent: 3336479 (1967-08-01), Blackett
patent: 3462652 (1969-08-01), Smith
patent: 3683372 (1972-08-01), Horn

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