Lamp failure monitoring system

Details Lamp failure monitoring system Lamp failure monitoring system

1986-01-08

1987-05-19

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

315 82, 340 79, 307101S, G08B 2100

Patent

active

046671870

ABSTRACT:
A microprocessor circuit employed to control the on/off switching of a filament lamp in series with a power switching device and a single conductor is programmed to periodically cycle the filament lamp between its deenergized and energized state at a rate above that which would be humanly perceptible. A toroidal ferrite core surrounds the conductor between the lamp filament and the switch and picks up current changes which occur due to the cycling. The absence of current changes during cycling are perceived by the microprocessor as a lamp failure and appropriate signaling is made to indicate the lamp failure.

REFERENCES:
patent: 3143729 (1964-08-01), Power
patent: 3457561 (1969-07-01), Zeisler
patent: 3532928 (1970-10-01), West
patent: 3633196 (1972-01-01), Winkler et al.
patent: 3801975 (1974-04-01), Kitano
patent: 3840852 (1974-10-01), Schwellenbach
patent: 3868628 (1975-02-01), Sakurai
patent: 3898513 (1975-08-01), Kopernik et al.
patent: 3995262 (1976-11-01), France et al.
patent: 4105996 (1978-03-01), Shimizu
patent: 4214236 (1980-07-01), Carp et al.
patent: 4217576 (1980-08-01), Wreford-Howard
patent: 4234866 (1980-11-01), Kuroda et al.
patent: 4348613 (1982-09-01), Hormel et al.
patent: 4376909 (1983-03-01), Tagami et al.

Affiliated with

Also associated with

Rating

Lamp failure monitoring system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lamp failure monitoring system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lamp failure monitoring system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1567434