Thermally actuatable switch construction
US3952274A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1974 |
| Grant date | Apr 20, 1976 |
| Priority date | — |
| Expiry date | Oct 4, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H37/64
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A thermally actuatable switch having a housing provided with a pair of leads, one of the leads having a contact and the other of the leads having a spring blade for making contact with the contact to complete an electrical circuit between the leads. The spring blade has a normal bias to move the same out of contact with the contact to open the circuit. A temperature sensitive member is carried by the housing and is adapted to collapse when the same is at a predetermined temperature. A biasing member is operatively associated with the temperature sensitive member and the spring blade to resiliently hold the spring blade in contact with the contact as long as the temperature sensitive member is in an uncollapsed condition thereof whereby the biasing member substantially compensates for any shrinkage and/or deterioration of the temperature sensitive member during its uncollapsed life and thus maintains the spring blade in contact with the contact.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.