Bulb-shaped flashtube with metal envelope
US4020379A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1975 |
| Grant date | Apr 26, 1977 |
| Priority date | — |
| Expiry date | Oct 2, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/92
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A bulb-shaped flashtube is provided with a metal envelope to increase its strength and enhance its reliability and operating characteristics. The metal envelope comprises a hollow cylindrical container including an open bottom end and an inwardly extending annular flange at its top end which defines a window opening in the container. A circular base of insulating material is sealed in the open bottom end of the container. A plurality of conductors extend through the insulating base to support a plurality of electrodes within the container. A circular, transparent window is sealed to the annular flange inside the top end of the container for transmitting a flash of light upon electrical discharge between the electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.