Thermal switch and method of making
US4135176A · kind A · utility
4Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1977 |
| Grant date | Jan 16, 1979 |
| Priority date | — |
| Expiry date | Oct 21, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H37/764
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A thermal switch device for automatically opening a circuit when the ambient temperature is increased to a predetermined level. A pair of conductor wires arranged in side by side fashion are spring loaded into contact with one another by inserting the contact regions into a cup-shaped pellet of heat-fusible material. The cup is structurally secured within a nonconductive tubular casing with a layer of insulative cement. The lead regions of the wires are also securely anchored within the casing with an insulative cement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.