Heat limiters and method of manufacture
US4383236A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1981 |
| Grant date | May 10, 1983 |
| Priority date | — |
| Expiry date | Dec 28, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2037/762
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit interrupting device responsive to externally generated heat and method of manufacture of such device. The device includes a pair of spaced, coaxially aligned leads each entering a thermally conductive housing from an opposite end. The inserted ends of the coaxially aligned leads are bridged by a conductive member comprising the tail of a conical spring which surrounds one of the leads and is secured at a corresponding end of the housing. The circuit-completing spring tail is secured by fusible material to the inserted ends of each of the spaced-apart leads. In a normal, closed circuit condition, the spring is under tension. Upon heating, the fusible material softens, allowing the spring tail to break away from the inserted ends of the spaced-apart leads, the retracting force of the conical spring, pulling the spring tail from the other one of the leads to open the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.