Miniature lamp construction and method of manufacture
US3959684A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 1975 |
| Grant date | May 25, 1976 |
| Priority date | — |
| Expiry date | Jan 2, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J5/62
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved miniature size electric lamp is disclosed wherein an outer wire lead of the lamp is flattened and adhesively bonded to the inside rim of the base shell with an electrically-conducting basing cement. A method of manufacture for said lamp construction is also disclosed wherein the flattened section of the wire lead is aligned to lie in a plane approximately tangent to the envelope wall of the lamp prior to positioning the lamp envelope for assembly to the base shell. A layer of electrically-conducting basing cement is located around the periphery of the base shell to provide improved electrical contact between the side wire lead and the base shell. An insulating cement is applied to the remaining eyelet contacting wire lead at the glass to metal junction and extends a sufficient distance along the lead to electrically insulate this wire lead from the electrically conducting cement. The particular lamp construction further can utilize an electrically insulating basing cement to adhesively bond the lamp envelope to the base shell having the same resin binder as employed in the electrically-conducting basing cement so that both cements can be heat-cured simultaneously during…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.