Single based electric lamp
US5218261A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1992 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Jan 21, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K1/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To reliably secure a sealed light source bulb element (1a), for example a logen incandescent lamp, to a standard screw-in base, for example an Edison E14 base, while surrounding the sealed bulb element (1a) with an outer bulb, a support carrier (8, 8'), for example of nickel-plated steel wire, is bent into essentially ring shape and seated on a ring seating surface (9) formed on a base sleeve which carries the Edison thread. The outer bulb (2) is formed with an extending neck (2a) cemented into a cylindrical extension from the base, leaving a small gap from the seating surface to define a groove within which the ring-shaped portion of the support carrier is located. The support carrier ends in a bent-away portion, bent out of the major plane of the ring-shaped portion of the support carrier, into engaging position with one (5) of two current supply leads (4, 5) which extend from the sealed light source bulb element, and is spot-welded to that lead. The support carrier can be secured to the base by soldering, brazing or the like, or, in the alternative, may be formed with an extended spiral portion fitted into the internal thread formed by the internally projecting threads formed by…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.