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Browse by Category: Main > Electrical & Energy
Class Information
Number: 315/135
Name: Electric lamp and discharge devices: systems > With signal, indicator, or alarm > Discharge device and/or rectifier in the signal circuit
Description: Systems provided with a discharge device or rectifier connected in the circuit of the signal, indicator or alarm means, the signal, indicator or alarm means being controlled by the current flowing through the discharge device or the rectifier.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8442785 System and method for streetlight monitoring diagnostics May. 14, 2013
8140276 System and method for streetlight monitoring diagnostics Mar. 20, 2012
7518316 Half-wave rectification circuit with a low-pass filter for LED light strings Apr. 14, 2009
7368916 Apparatus and methods for making capacitive measurements of cathode fall in fluorescent lamps May. 6, 2008
7282869 HID ballast and lamp tester Oct. 16, 2007
7238326 Germicidal treatment system with status indicator Jul. 3, 2007
7023353 Warning device status circuit including a status output device Apr. 4, 2006
6388393 Ballasts for operating light emitting diodes in AC circuits May. 14, 2002
6069452 Circuit configuration for signal transmitters with light-emitting diodes May. 30, 2000
5748094 Switch with current flow detector May. 5, 1998
5657117 Device for examining optical waveguides Aug. 12, 1997
5614790 Automatic alarm for fluorescent blinking Mar. 25, 1997
5422543 Flash monitor alarm system Jun. 6, 1995
5416384 Back-up lighting system May. 16, 1995
5115165 Safety lighting means for use with a high intensity discharge lamp May. 19, 1992
5017837 Indicator lamp system May. 21, 1991
4998042 Self-relamping clearance/marker light assembly Mar. 5, 1991
4792701 Failure compensation circuit with thermal compensation Dec. 20, 1988
4572987 Lamp monitoring circuit Feb. 25, 1986
4515452 Data inserting device for camera May. 7, 1985
4496939 Power indicator apparatus for a DC to DC flyback converter Jan. 29, 1985
4467246 Light quantity controller and input device Aug. 21, 1984
4451822 Device for automatically checking a plurality of electric indicator lights May. 29, 1984
4396870 Electronic flash device Aug. 2, 1983
4380718 Trailer marker light substitution circuit Apr. 19, 1983
4359670 Lamp intensity control apparatus comprising preset means Nov. 16, 1982
4358714 Light dimming system for grounded-side control of discrete indicator lamps Nov. 9, 1982
4318031 Lamp, ballast and starter visual monitor Mar. 2, 1982
4315196 Disconnection detecting circuit of double-filament spherical lamp Feb. 9, 1982
4311576 Electric corrosion preventing apparatus Jan. 19, 1982
4296356 Ionization vacuum gauge circuit Oct. 20, 1981
4295079 Lamp circuit with disconnected lamp detecting device Oct. 13, 1981
4274084 Audio-visual signal circuits Jun. 16, 1981
4271375 Flash light discharge device Jun. 2, 1981
4259615 Photographic flash device Mar. 31, 1981
4258290 Operation indicator for auto-strobo unit Mar. 24, 1981
4232252 Lighting network including a gas discharge lamp and standby lamp Nov. 4, 1980
4222047 Lamp failure detection apparatus Sep. 9, 1980
4201934 External sensor for electronic flash May. 6, 1980
4197484 Electronic flash device with voltage display Apr. 8, 1980
4190830 Lamp outage indicator circuit Feb. 26, 1980
4189662 Safety device for lamps of motor vehicle Feb. 19, 1980
4177413 Battery chargers Dec. 4, 1979
4170004 Device for monitoring the serviceability of optical indicators Oct. 2, 1979
4145637 Capacitor charge indicator in an electronic photoflash Mar. 20, 1979
4132926 Electronic flash devices Jan. 2, 1979
4100459 Indicator circuit for electronic flash apparatus Jul. 11, 1978
4091308 Electronic photographic flash apparatus May. 23, 1978
4091307 Emergency lighting system for gaseous-discharge lamps May. 23, 1978
4068150 Voltage indication means for an electronic flashing device Jan. 10, 1978

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