High efficiency flasher
US4894588A · kind A · utility
7Cited by
5References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 25, 1988 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Jan 25, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A heavy duty flasher for incandescent lamps for a motor coach or the like incorporates a pair of power MOSFETs in parallel for efficient, cool operation and includes a pair of timers, one for flash rate control and the other for producing AC for operating a voltage multiplier to provide gate voltage for the MOSFETs. Protective circuitry senses current overload and terminates current flow to protect the power devices while allowing inrush current to the lamps at the beginning of each cycle. A circuit sensitive to the presence of load supplies power to the timers only under load conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.