Fuel ignition system having interlock protection and electronic

Details Fuel ignition system having interlock protection and electronic Fuel ignition system having interlock protection and electronic

1977-03-07

1978-12-26

Dority, Jr., Carroll B.

Combustion

With indicator or inspection means

Correlated with action of condition responsive burner control

431 22, 431 46, F23Q 912

Patent

active

041314123

ABSTRACT:
A fuel ignition system of the pilot ignition type including a control circuit for operating pilot and main valves of a redundant valve assembly, the control circuit having control relays which provide an interlock on start-up to prevent the energization of the valves under certain failure conditions, the control circuit including a flame sensing circuit which is operable to prevent start-up of the system when a flame is provided as the result of a leak condition for the pilot valve, and to terminate an ignition cycle causing complete shut off of fuel whenever a flame is provided as the result of a leak condition for the main valve.

REFERENCES:
patent: 3086583 (1963-04-01), Reichow
patent: 3194296 (1965-07-01), Brown
patent: 3840322 (1974-10-01), Cade
patent: 4035134 (1977-07-01), Matthews
patent: 4047878 (1977-09-01), Matthews

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