G - Physics – 05 – D
Patent
G - Physics
05
D
341/19
G05D 23/19 (2006.01) F23N 5/20 (2006.01) F23N 5/24 (2006.01) F23N 5/12 (2006.01)
Patent
CA 1085491
ELECTRONIC VALVE SEAT LEAK DETECTOR Abstract of the Disclosure: An automatic fuel ignition system which provides automatic detection of a leak condition for a pilot valve which is operable to supply fuel to a pilot burner for ignition to establish pilot flame and a main valve which is operable to supply fuel to a main burner for ignition by the pilot flame of the system including a control circuit operable in response to a request signal to activate the system tentatively, a delay circuit which delays the operation of the pilot valve for a first delay period after the occurrence of the request signal, a flame sensing circuit which senses the presence of the pilot flame and effects operation of the main valve after a second delay period established by the control circuit, the flame sensing circuit being responsive to the presence of a flame at the pilot burner during the first delay period or at the main burner during the second delay period to cause the system to be deactivated.
260004
Johnson Controls Inc.
Osler Hoskin & Harcourt Llp
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