Method and apparatus for position orientation of a metal halide lamp base assembly
US4687453A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1986 |
| Grant date | Aug 18, 1987 |
| Priority date | — |
| Expiry date | Nov 28, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus for position orienting a base assembly of a metal halide lamp is describe for maintaining the curved arc tube in the upward position when the lamp is inserted in a socket. Once the lamp has been fully assembled and sealed a locator structure is attached to the base shell in order to create a base assembly which will properly position the lamp when it is in the socket. The welding apparatus of the present invention resistance welds the locator structure onto the base shell once the locator structure has been aligned approximately 90 degrees counterclockwise from the tip of the curved portion of the arc tube when viewed from the dome end of the lamp. The lamp resulting from the method and use of the apparatus will be more inexpensive and will not have the problems of a loose base or a cracked seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.