US PATENT SUBCLASS 431 / 54
.~.~.~.~.~ Reset includes structure preventing feed to second burner prior to sensed combustion at first burner

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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  DF  .~.~.~ First burner manual reset valve cut off {2}
53  DF  .~.~.~.~ Single valve cuts off branched flow {1}
54.~.~.~.~.~ Reset includes structure preventing feed to second burner prior to sensed combustion at first burner

DEFINITION

Classification: 431/54

(under subclass 53) Apparatus including a valve, additional to the valve controlling flow to the first and second burner, in a branch leading to the second burner; said additional valve being closed or locked in the closed position until combustion is sensed at the first burner.