Expansion composition

Details Expansion composition Expansion composition

1997-04-22

1999-10-26

Tapolcai, William E.

Automatic temperature and humidity regulation

Motors

Relay

60528, 251 11, G05D 23275

Patent

active

059712880

ABSTRACT:
A thermostatic control valve has an expansion composition held in a cavity thereof. The composition contains electrical conductor particles dispersed throughout an electrical isolator. The particles conduct electrical current through the isolator when the electrical isolator has a volumetric size that is less than a predetermined expanded volume. When the isolator expands to the predetermined expanded volume, the distance between the particles is increased to the extend that the electrical current cannot be conducted.

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patent: 5385296 (1995-01-01), Kurz et al.
patent: 5582138 (1996-12-01), Ziolek et al.

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