Three-electrode short duration flash tube
US4004189A · kind A · utility
11Cited by
10References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1976 |
| Grant date | Jan 18, 1977 |
| Priority date | — |
| Expiry date | Jun 7, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/90
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A flash tube having an elongated tubular envelope containing a pair of anode electrodes disposed at opposite ends and a centrally located cathode electrode which is common to both anodes for simultaneously defining two separate arc discharge paths during operation. The three-electrode configuration is particularly useful in photograhic and photocopying applications for minimizing dark spots and providing a shorter flash duration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.