Safety apparatus for combustion device

Details Safety apparatus for combustion device Safety apparatus for combustion device

1985-02-08

1987-01-27

Scott, Samuel

Stoves and furnaces

Liquid heater

Fluid fuel burner for other than top-accessible vessel

236 15E, 431 76, F24H 108, F23N 524

Patent

active

046387897

ABSTRACT:
A CO sensor is mounted on the heat exchanger of a gas water heater (or other combustion unit) and is connected in circuit with a detecting unit mounted separately from the heater. The detecting unit generates a control voltage in opposition to a reference voltage on a solenoid. The solenoid controls a valve in a fuel supply passage to a burner (or burners) in the heater, thereby shutting off the burners when the CO concentration reaches a predetermined value. A timing circuit may be added to cut off the burners whenever a lesser CO concentration continues for a predetermined time period.

REFERENCES:
patent: 2767330 (1956-10-01), Marshall
patent: 4032286 (1977-06-01), Kobayashi et al.
patent: 4125356 (1978-11-01), Ohashi et al.
patent: 4392813 (1983-07-01), Tanaka et al.
patent: 4396370 (1983-08-01), Yamana et al.
patent: 4406613 (1983-09-01), Naito et al.

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