Fuel ignition control arrangement employing dual flame sensors

Details Fuel ignition control arrangement employing dual flame sensors Fuel ignition control arrangement employing dual flame sensors

1978-04-17

1980-04-08

Dority, Jr., Carroll B.

Combustion

Timer, programmer, retarder or condition responsive control

With test circuit checking or analyzing flame sensing...

431 46, 431 71, F23Q 914

Patent

active

041970829

ABSTRACT:
A control arrangement for a pilot ignition type fuel ignition system includes a first switch device which effects energization of a pilot valve at the start of an operating cycle to supply fuel to a pilot outlet for ignition to provide a pilot flame. The first switch device is enabled by a control circuit which in turn is enabled over a path provided by a second switch device. The second switch device is enabled by a flame sensing circuit when a pilot flame is established and operates to effect energization of a main valve and to interrupt the enabling path for the control circuit, and a further flame sensing circuit maintains the first switch device, and thus the pilot valve, operated following operation of the second switch device.

REFERENCES:
patent: 2616490 (1952-11-01), Wilson et al.
patent: 2748846 (1956-06-01), Smith et al.
patent: 3758260 (1973-09-01), Newport
patent: 3840322 (1974-10-01), Cade
patent: 3914092 (1975-10-01), Matthews
patent: 3975135 (1976-08-01), Kinsella
patent: 3975136 (1976-08-01), Baysinger
patent: 4015928 (1977-04-01), Carlson
patent: 4019854 (1977-04-01), Carlson et al.
patent: 4035134 (1977-07-01), Matthews

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