Resettable thermal safety switch
US4118683A · kind A · utility
6Cited by
1References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1977 |
| Grant date | Oct 3, 1978 |
| Priority date | — |
| Expiry date | Jun 30, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2037/705
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A resettable thermal safety switch having a bistable domed bimetallic disc serving as a heat-responsive switching element which pops from its normal curvature to an opposite curvature, thereby moving a contact breaking plate, the switch having a reset button which is arranged to return the disc to its normal state and to close the switch, but between the reset button and the moving parts of the switch is arranged a force-limiting assembly which prevents resetting or blocking of the switching action at the critical temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.