Gas tube fail safe device for telephone protector modules
US5027100A · kind A · utility
17Cited by
3References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1990 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | Feb 12, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T1/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A gas tube fail safe device for use in individual subscriber circuit telephone mmodules and related equipment, in which a fusible element is adapted to by-pass the conductive function of the gas tube in the event of gas tube failure. In one embodiment the construction provides for the fusing of the fusible element upon the occurrence of a sustained current overload. In another embodiment, this operation is supplemented by provision of secondary air gap means operative upon the occurrence of momentary excess voltage surges in the presence of a defective gas tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.