Light bulb base having an enlarging external thread
US5990606A · kind A · utility
Inventor
Key dates
| Filing date | Dec 1, 1997 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Dec 1, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R33/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved electrically conductive light bulb base for use with common threaded light bulb sockets currently widely used. The improvement combines a substantial reduction in the amount of thread required, by employing a shorter thread that enlarges or increases in size, in radius, or both. This type of thread is in place of the standard thread in securing the bulb in the socket. Optionally, short portions of thread may be provided on one side of a generally cylindrical, smooth base. The particular advantage is that the bulb inserted by hand can be inserted and secured or released and removed with a minimum number of turns of the wrist.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.