US PATENT SUBCLASS 431 / 58
.~.~ Sensor controls diaphragm motor of second burner valve

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}
58.~.~ Sensor controls diaphragm motor of second burner valve

DEFINITION

Classification: 431/58

(under subclass 42) Apparatus wherein the first burner sensor controls the flow of actuating fluid relative to a diaphragm that operates a valve controlling flow in the feed line of the second burner.