Electric lamp and discharge devices: systems – Automatic substitution of the load device or electrode – With current shifting switch
Patent
1981-05-22
1983-04-19
La Roche, Eugene R.
Electric lamp and discharge devices: systems
Automatic substitution of the load device or electrode
With current shifting switch
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
Kelsey-Hayes Co.
La Roche Eugene R.
Skinkiss Ralph J.
Todd Oliver E.
LandOfFree
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.
Profile ID: LFUS-PAI-O-838429