Composition resistor with an integral thermal fuse
US4006443A · kind A · utility
16Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1975 |
| Grant date | Feb 1, 1977 |
| Priority date | — |
| Expiry date | Sep 11, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49107
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A composition resistor incorporates a thermal fuse inert preferably positioned at its center. The insert includes a fuse link which under normal conditions provides electrical continuity between lead wires extending from each end of the resistor. If a current overload occurs, the heat generated by the resistance material raises the temperature at the center of the resistor to the melting point of the fuse link and the fuse link opens circuit before the organic constituents of the resistor begin to decompose or ignite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.