Gas tube fail-safe device for telephone protector modules
US4910489A · kind A · utility
10Cited by
9References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 1989 |
| Grant date | Mar 20, 1990 |
| Priority date | — |
| Expiry date | May 1, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T1/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fail-safe secondary fuse device for assuring the grounding of a conductive gas tube used in modular protection devices for individual subscriber circuit pairs. The device resiliently engages each of the three end and center electrodes normally provided on the tube. In the case of the end electrodes, the device is insulated from direct electrical communication by a fusible sleeve of insulative material which fuses under heat emanating from the gas tube with the occurrence of continued current overload.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.