Low pressure mercury vapor discharge lamp and preparation thereof
US4703227A · kind A · utility
11Cited by
5References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1985 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | Apr 12, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Both legs (1a, 1b) of a U-shaped bulb are brought into a mutually contacting state or are opposed to each other with a space of gap (31) and end parts (1a', 1b') of the legs are directly put on an end plate (10) so as to form an electric discharge path in the U-shaped bulb. Since the legs (1a, 1b) are in contact with each other within limit of elastic deformation of a connecting part (2a) of the bulb (1), breakage of the bulb is avoidable even when an external force is applied to the bulb so as to bring the legs (1a, 1b) closer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.