US PATENT SUBCLASS 236 / 15 R
FURNACE CONTROLLED

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

15 RFURNACE CONTROLLED {4}
15 A  DF  .~> Domestic oven controls
15 BR  DF  .~> Commercial furnace controls {7}
15 C  DF  .~> Furnace controlled responsive to pressure
15 E  DF  .~> Furnace controlled responsive to combustion products composition

Unofficial Alpha Subclasses: R A BR BA BB BC BD BE BF BG

DEFINITION

Classification: 236/15

(under the class definition) Devices controlling the fire according to conditions in the furnace.

SEE OR SEARCH THIS CLASS, SUBCLASS:

14, for controls responsive to boiler and furnace.

95, 96, for furnace control where the thermostat is attached to the outside of the heater or flue.

104, for furnace controls operated by the expansion or contractions of the furnace parts due to temperature changes.