US PATENT SUBCLASS 431 / 41
.~.~ Supply of heat to heating structure controlled

Current as of: June, 1999
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431 /   HD   COMBUSTION

18  DF  TIMER, PROGRAMMER, RETARDER OR CONDITION RESPONSIVE CONTROL {26}
36  DF  .~ Of or by burner feed supply heating structure {2}
41.~.~ Supply of heat to heating structure controlled

DEFINITION

Classification: 431/41

(under subclass 36) Apparatus in which a means sensing a condition of the heating structure actuates a controller of the heat supply of the structure.