US PATENT SUBCLASS 126 / 597
.~.~.~.~ Differential temperature control

Current as of: June, 1999
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126 /   HD   STOVES AND FURNACES

569  DF  SOLAR HEAT COLLECTOR {18}
572  DF  .~ With control means energized in response to actuator stimulated by condition sensor {3}
593  DF  .~.~ Of collector {2}
595  DF  .~.~.~ Temperature responsive {4}
597.~.~.~.~ Differential temperature control

DEFINITION

Classification: 126/597

Differential temperature control:

(under subclass 595) Apparatus wherein a difference between two temperatures is measured and in response to such measurement, a device is actuated to operate a function of the apparatus.