US PATENT SUBCLASS 454 / 28
.~.~.~ With temperature sensitive release

Current as of: June, 1999
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454 /   HD   VENTILATION

1  DF  CHIMNEY OR STACK {6}
3  DF  .~ Chimneytop or stacktop structure (e.g., cowl) {12}
27  DF  .~.~ Having readily movable air current regulating means {3}
28.~.~.~ With temperature sensitive release

DEFINITION

Classification: 454/28

With temperature sensitive release:

(under subclass 27) Subject matter wherein the shiftable means moves in reaction to temperature.

SEE OR SEARCH THIS CLASS, SUBCLASS:

257, for a building inlet airway including an emergency smoke or fire responsive valve.

342, for a building outlet airway including an air pump and having means for controlling or dealing with smoke.

357, for other building outlet airways having means for controlling or dealing with smoke.

369, for fusible release controlled fire dampers.

SEE OR SEARCH CLASS 126, Stoves and Furnaces,

287.5, for fusible release dampers for stoves or furnaces.

169, Fire Extinguishers, particularly

42, and 56+ for fire extinguishing apparatus responsive to smoke or fire.

236, Automatic Temperature and Humidity Regulation, various subclasses for an automatic mechanism for controlling temperature which does not include the device or system controlled.