Safety switch which renders high intensity discharge lamp inoperative on accidental breakage of outer envelope
US4186327A · kind A · utility
2Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 15, 1977 |
| Grant date | Jan 29, 1980 |
| Priority date | — |
| Expiry date | Mar 15, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An HID lamp utilizes a thin, fragile, strip-like conductor member affixed to and carried on a portion of the inner surface of the lamp protective envelope. Upon breakage of the protective envelope, the fragile conductor will break and interrupt the electrical continuity of the lamp's electrical circuit, thereby rendering the lamp inoperative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.