US PATENT SUBCLASS 431 / 26
.~.~ Test circuit activated, then inactivated in starting

Current as of: June, 1999
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431 /   HD   COMBUSTION

18  DF  TIMER, PROGRAMMER, RETARDER OR CONDITION RESPONSIVE CONTROL {26}
24  DF  .~ With test circuit checking or analyzing flame sensing circuit for malfunction {2}
26.~.~ Test circuit activated, then inactivated in starting

DEFINITION

Classification: 431/26

(under subclass 24) Apparatus in which a starting means connects a checking circuit into a flame sensing circuit as a preliminary to fuel feed and subsequently disconnects the checking circuit.

SEE OR SEARCH CLASS

340, Communications: Electrical,

515, for the testing of an automatically responsive communications system of general utility having a test structure for the system including means simulating the condition being sensed.