Thermally responsive switch
US8902037B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2007 |
| Grant date | Dec 2, 2014 |
| Priority date | — |
| Expiry date | May 12, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2050/025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A thermally responsive switch includes a hermetically sealed container including a metal housing and a header plate, at least one conductive terminal pin hermetically fixed in a through hole, a fixed contact fixed-to the terminal pin in the container, a thermally responsive plate having one end connected via a support to an inner surface of the container and reversing a curvature direction at a predetermined temperature, and at least one movable contact electrically conductively secured to the other end of the thermally responsive plate. Each contact includes a silver-tin oxide-indium oxide system contact. The container is filled with a gas containing helium ranging from 50% to 95% so that an internal pressure of the container ranges from 0.3 to 0.6 atmosphere at room temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.