US PATENT SUBCLASS 431 / 67
.~ Igniter heat up and fuel feed sequence controlled by timer or retarder

Current as of: June, 1999
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431 /   HD   COMBUSTION

18  DF  TIMER, PROGRAMMER, RETARDER OR CONDITION RESPONSIVE CONTROL {26}
67.~ Igniter heat up and fuel feed sequence controlled by timer or retarder

DEFINITION

Classification: 431/67

(under subclass 18) Apparatus providing for a timed period between energization of an igniter of a burner assembly and following admission of fuel to the burner head for ignition by the igniter.