US PATENT SUBCLASS 236 / 91 B-- .~.~ With oil burner

US PATENT SUBCLASS 236 / 91 B
.~.~ With oil burner

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

*	DD	THERMOSTATIC {9}
91 R	DF	.~ Hot and cold {7}
91 B		.~.~ With oil burner

Unofficial Alpha Subclasses: R A B C D E F G

DEFINITION

Classification: 236/91

(under the class definition) Devices operated by a plurality of thermostats, one or more in a location at low temperature

(as the outside of a building) and the others at a relatively high temperature, (as the inside of a building).

SEE OR SEARCH THIS CLASS, SUBCLASS:

9, 14, 37, and 47, for systems which are controlled by temperature at plural places.

44, for opposed thermostats.

SEE OR SEARCH CLASS

165, Heat Exchange, 257, for a selective heating or cooling arrangement controlled by room and ambient temperature sensors.