Means for converting a lamp with a screw-type base into a lamp with a bi-pin base
US4928032A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1989 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Mar 31, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R33/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
For converting a lamp with a screw-type base into a lamp with a bi-pin base, there is provided a cup-shaped adapter of electrical insulating material comprising a tubular body containing a bore that has internal threads threadedly receiving the external threads on the usual metal shell of the screw-type base. The adapter further comprises an end wall extending across the bore at one end of the tubular body and carrying two conductive pins extending through the end wall in laterally-spaced relation. First conductor within the adapter connected to one pin has a free end that engages the usual coniform end of the metal shell when the base is threaded into said bore, thereby establishing an electrical connection between the metal shell and said one pin. Second conductor connected to the other pin establishes an electrical connection between the usual eyelet of the base and the other pin when the base is threaded into said bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.