US PATENT SUBCLASS 431 / 43
.~.~ With electrical igniter

Current as of: June, 1999
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431 /   HD   COMBUSTION

18  DF  TIMER, PROGRAMMER, RETARDER OR CONDITION RESPONSIVE CONTROL {26}
42  DF  .~ Sensor of first burner controls second burner, e.g., pilot and main, etc. {8}
43.~.~ With electrical igniter {4}
44  DF  .~.~.~> Igniter deenergized by fuel pressure variation in start effort
45  DF  .~.~.~> Igniter deenergized by timer, programmer or retarder
46  DF  .~.~.~> Igniter deenergization responsive to first burner ignition
47  DF  .~.~.~> With manual igniter actuation

DEFINITION

Classification: 431/43

(under subclass 42) Apparatus having an electrical spark producing means or an electrical heating element associated with one of the burners to ignite fuel supplied to the burner.