Article for increasing the life expectancy of filament light bulbs
US3963956A · kind A · utility
Inventor
Key dates
| Filing date | Apr 16, 1975 |
| Grant date | Jun 15, 1976 |
| Priority date | — |
| Expiry date | Apr 16, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R33/9453
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An article positionable in a conventional light bulb socket for decreasing the power input and limiting the power turn-on and turn-off transients to a bulb inserted into such socket to thereby increase the life expectancy of the light bulb. The article includes a wafer of insulating material having a notch in the perimeter thereof, an axial lead diode or other power decreasing and/or transient limiting device positioned in the notch, the leads of the device extending radially inwardly and being positioned and/or coiled into spiral patterns or other patterns to form electrical terminals at the center of the wafer, on opposite sides thereof, and a pair of flexible pads of insulating material having widths approximately equal to the inside diameter of the base of the light bulb socket, the pads being secured to opposite sides of the wafer, the diode, and each other, each pad having a central opening therein to expose the electrical terminals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.