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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:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 4055831 |
System for indicating interruption in operation of automotive lamps |
Oct. 25, 1977 |
| 4054814 |
Electroluminescent display and method of making |
Oct. 18, 1977 |
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