Class 236/99C - External and internal sensors

Subclass of Class 236 - Automatic temperature and humidity regulation
No. of patents: 4
Last issue date: 06/23/1992

Number	Title	Issue Date
5125068	Apparatus for controlling heating of fluids utilizing adjustable temperature set point A temperature control device for a fluid heating vessel senses ambient temperature and controls or adjusts the set point at which power is reduced to an element for heating the fluid in the heating vessel, in order to prevent boil-over of the fluid. The T...	06/23/1992
5014680	Self-powered automatic secondary air controllers for woodstoves and small furnaces A controller for automatically regulating the supply of secondary combustion air to woodstoves and small furnaces. The controller includes a movable air valve for controlling the amount of secondary air admitted into the chamber. A self powered means moni...	05/14/1991
4016901	Thermostatic valve A fluid temperature actuated valve for trapping fluids in a system, having particular utility as a steam trap. The valve is closed by the expansion of a wax pellet type thermal actuator working against the valve opening force of an operating spring. The v...	04/12/1977
3949777	Valve construction and system utilizing the same A three-way changeover valve construction having a housing means provided with an inlet and a pair of outlets. A pair of valve seats are carried by the housing for respectively controlling fluid flow from the inlet through the outlets. A pair of valve mem...	04/13/1976

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