Vibration resistant lamp and base, and method of its manufacture
US5270610A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1991 |
| Grant date | Dec 14, 1993 |
| Priority date | — |
| Expiry date | May 1, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J5/48
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To connect a vitreous lamp bulb which has an essentially tubular extension 6) to a base lamp holding structure (2), the holding structure is formed with a cylindrical recess into which the tubular extension is fitted. The material of the lamp holding structure, or at least a portion adjacent the recess, is a high-temperature meltable plastic, and the extension portion is surrounded by a spiral spring or wire loops which, to attach the lamp to the base lamp holding structure, is subjected to a high-frequency electromagnetic field so that, by induction, the plastic surrounding the extension will melt, and embed the spiral or looped wires in the molten plastic while oozing towards the extension portion to securely grip the extension portion in the base lamp holding structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.