US PATENT SUBCLASS 431 / 68
.~ Sensing of hot combustion zone condition blocks restart attempt

Current as of: June, 1999
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431 /   HD   COMBUSTION

18  DF  TIMER, PROGRAMMER, RETARDER OR CONDITION RESPONSIVE CONTROL {26}
68.~ Sensing of hot combustion zone condition blocks restart attempt

DEFINITION

Classification: 431/68

(under subclass 18) Apparatus including control means responsive to the temperature in a combustion zone and requiring a sensed cold condition of the combustion zone before a start or recycle attempt can be effective to feed fuel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

29+, for a control means providing a combustion start up delay period after sensed flame failure.