Method and apparatus for saving energy
US4156166A · kind A · utility
49Cited by
8References
78Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1976 |
| Grant date | May 22, 1979 |
| Priority date | — |
| Expiry date | Dec 20, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for regulating the output flux generated by a lamp with the degeneration of the voltage from a power source such as a battery. The regulating circuit maintains a constant luminous flux output from a lamp over a substantial range of voltages by switching the voltage to the lamp on and off at a preselected and controlled duty cycle. The duty cycle varies with the variations in the lamp electrical operating parameter provided to the regulating circuit. The regulating circuit permits the useful life of a power source to be substantially increased before requiring replacement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.