Surrounding a portion of a lamp with light regulation apparatus
US5239239A · kind A · utility
9Cited by
55References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1992 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Mar 26, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device for regulating the intensity of light emitted by a lamp includes a variable inductor configured to surround a portion of the lamp and electrical circuitry arranged to connect electrically the variable inductor to the lamp in a manner such that a variation in the inductance of the variable inductor will cause a corresponding variation in the intensity of light emitted by the lamp while the lamp is electrically connected to the variable inductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.