Trailer marker light substitution circuit

Electric lamp and discharge devices: systems – Automatic substitution of the load device or electrode – With current shifting switch

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

307 10LS, 315135, 315 77, 340642, H05B 3910, B60Q 126

Patent

active

043807186

ABSTRACT:
An improved dual polarity substitution circuit for energizing a secondary load, such as an incandescent lamp, upon failure of a primary load. Dual polarity is achieved through the use of parallel PNP and NPN transistors, one of which conducts so long as the primary load is functional. Upon failure of the primary load and interruption of current flow in the conducting one of the transistors, a bidirectional switch such as a triac is fired to energize the secondary load.

REFERENCES:
patent: 3659146 (1972-04-01), Munson
patent: 3883777 (1975-05-01), Morita
patent: 4128860 (1978-12-01), Spiteri
patent: 4216525 (1980-08-01), Spiteri

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Trailer marker light substitution circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Trailer marker light substitution circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Trailer marker light substitution circuit will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-838429

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.