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Class Information
Number: 315/89
Name: Electric lamp and discharge devices: systems > Automatic substitution of the load device or electrode > Plural substitution of load devices or electrodes
Description: Systems in which two or more substitute load devices or electrodes are provided for successive substitution as required.

Patents under this class:

Patent Number Title Of Patent Date Issued
8502467 Controller for a light fixture Aug. 6, 2013
6271630 High intensity discharge lighting fixture Aug. 7, 2001
RE34886 Electrical system for vehicle daytime running lights Mar. 28, 1995
5105124 Lamp failure detecting device Apr. 14, 1992
4841199 Electrical system for vehicle daytime running lights Jun. 20, 1989
4841196 Two-filament lamp and operating circuit and method for designing same Jun. 20, 1989
4709188 Operation of standby filament associated with an AC arc discharge lamp ballast Nov. 24, 1987
4527095 Lamp circuit apparatus Jul. 2, 1985
4253042 Alternating current lampchanger control circuit Feb. 24, 1981
4216525 Truck marker light Aug. 5, 1980
4190777 Position sensor for rotatable lamp changer turret Feb. 26, 1980
4142129 Lamp changing system for projectors Feb. 27, 1979
4128860 Truck marker light Dec. 5, 1978
3964040 Circuit for detecting burned-out lamp for a buoy lamp changer Jun. 15, 1976

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