US PATENT SUBCLASS 431 / 52
.~.~.~ First burner manual reset valve cut off

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}
51  DF  .~.~ Both burners cut off upon sensed extinguishment of first burner {2}
52.~.~.~ First burner manual reset valve cut off {2}
53  DF  .~.~.~.~> Single valve cuts off branched flow {1}
55  DF  .~.~.~.~> Burners independently controlled by reset valves

DEFINITION

Classification: 431/52

(under subclass 51) Apparatus including valve means for the first burner that must be manually opened after shutdown to feed the first burner for reignition.