Thermostatic sensor and method to produce the same

Details Thermostatic sensor and method to produce the same Thermostatic sensor and method to produce the same

G - Physics

05

D

26/111, 236/17,

G05D 23/12 (2006.01)

Patent

CA 1160191

ABSTRACT OF THE DISCLOSURE Thermostatic sensor for controlling radiator valves either directly or by remote control, comprising a cup-like metallic vessel (1) with a compressible plastic bellows (3) and a means (6) for effecting control movements in response to expansion or contraction of the bellows. The space between the vessel and the outside of the bellows is hermetically enclosed and filled with a wax medium (2) with high coefficient of thermal expansion. A sensor of this type is produced in one way by inserting wax in freely-fluid condition into the vessel (1), after which the bellows in compressed or sucked-together condition is dipped down into the fluid medium and is there allowed to expand again, after which the vessel is closed by means of a washer or the like. Another way of producing the sensor is by dipping the bellows into a freely-fluid mass of wax while the bellows is compressed, and the wax is then allowed to solidify. The outside wax is shaped to conform to the inside of the vessel and is inserted in place and hermetically sealed. -13-

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