US PATENT SUBCLASS 236 / 26 E
.~.~ Pressure responsive means controls oil burner

Current as of: June, 1999
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236 /   HD   AUTOMATIC TEMPERATURE AND HUMIDITY REGULATION

20 R  DF  CLOSED FLUID HEATERS {8}
26 R  DF  .~ Pressure-operated {11}
26 E.~.~ Pressure responsive means controls oil burner

Unofficial Alpha Subclasses: R A B C D E F

DEFINITION

Classification: 236/26

(under subclass 20) Devices not otherwise classifiable controlling the heating of the closed fluid-heater according to the pressure in the heater.

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8, 14, 17, and 85, for other pressure operated controls.