Adjustable thermal actuator

Details Adjustable thermal actuator Adjustable thermal actuator

1977-09-06

1979-02-20

Gorenstein, Charles

Measuring and testing

Gas analysis

Moisture content or vapor pressure

733624, 733626, 733627, G01K 548

Patent

active

041400178

ABSTRACT:
A temperature responsive device, for example for controlling a ventilator or a valve, is provided which comprises a cylinder containing a substance which expands on being heated, thermal expansion of the substance causing expulsion of a piston rod from the cylinder. The device is characterized in that the piston rod constitutes a primary piston which passes through a central bore of a secondary piston which is movable axially in the bore of the cylinder, and in that there is provided threaded onto one end of the cylinder and surrounding the piston rod a sleeve which serves to limit movement of the secondary piston in one direction, with rotation of the sleeve relative to the cylinder being used to adjust the effective volume of the cylinder.

REFERENCES:
patent: 3019653 (1962-02-01), Swales et al.
patent: 3183720 (1965-05-01), Baker
patent: 3404530 (1968-10-01), Churchill et al.
patent: 3968692 (1976-07-01), Blattler et al.

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