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Class Information
Number: 313/344
Name: Electric lamp and discharge devices > Electrode and shield structures > Filament or resistance heated electrodes > Coiled
Description: Filaments and electrodes where the filament is formed into a coil.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7462991 |
Fluorescent lamp cathode and method of making cathodes |
Dec. 9, 2008 |
| 7456558 |
Electric incandescent lamp provided with different pitch factors for each end of a filament component |
Nov. 25, 2008 |
| 7352846 |
Filament for X-ray tube and X-ray tube having the same |
Apr. 1, 2008 |
| 7218047 |
Indirectly heated electrode for gas discharge tube |
May. 15, 2007 |
| 7190117 |
Incandescent lamp having a carbide-containing luminous element |
Mar. 13, 2007 |
| 6984928 |
Coil filament |
Jan. 10, 2006 |
| 6922017 |
Infrared lamp, method of manufacturing the same, and heating apparatus using the infrared lamp |
Jul. 26, 2005 |
| 6853119 |
Double layer electrode coil for a HID lamp and method of making the electrode coil |
Feb. 8, 2005 |
| 6809477 |
Fluorescent lamp electrode for instant start circuits |
Oct. 26, 2004 |
| 6784605 |
Halogen incandescent lamp and a lighting apparatus using the lamp |
Aug. 31, 2004 |
| 6777860 |
Luminous element for lamp |
Aug. 17, 2004 |
| 6690103 |
Incandescent light bulb with variable pitch coiled filament |
Feb. 10, 2004 |
| 6492768 |
Cathode ray tube having an improved indirectly heated cathode |
Dec. 10, 2002 |
| 6426587 |
Thermionic emitter with balancing thermal conduction legs |
Jul. 30, 2002 |
| 6191527 |
Stress relieved filament support assembly |
Feb. 20, 2001 |
| 5962972 |
Electric incandescent lamp |
Oct. 5, 1999 |
| 5959398 |
Cathode ray tube with improved cathode structure |
Sep. 28, 1999 |
| 5936350 |
Metal halide headlamp |
Aug. 10, 1999 |
| 5923122 |
Electrodeless bulb with means for receiving an external starting electrode |
Jul. 13, 1999 |
| 5864209 |
Cathode filament for an ultra-violet discharge lamp |
Jan. 26, 1999 |
| 5861716 |
Magnetron having a cathode mount with a grooved recess for securely receiving a cathode filament |
Jan. 19, 1999 |
| 5811934 |
Electric incandescent halogen lamp with barrel-shaped bulb |
Sep. 22, 1998 |
| 5793161 |
High-pressure discharge lamp electrode |
Aug. 11, 1998 |
| 5729081 |
Electrode coil for discharge lamps and method for producing such an electrode coil |
Mar. 17, 1998 |
| 5729082 |
Cathode structure comprising a heating element |
Mar. 17, 1998 |
| 5680003 |
Coiled-coil filament design for an incandescent lamp |
Oct. 21, 1997 |
| 5629586 |
Compact fluorescent lamp unit having first and second sealed end portions separated by a support member |
May. 13, 1997 |
| 5510675 |
Flicker-suppressed, low-power, high-pressure discharge lamp |
Apr. 23, 1996 |
| 5453657 |
Indirectly-heated cathode heater structure for a cathode ray tube |
Sep. 26, 1995 |
| 5426351 |
Heater coil for electron tube |
Jun. 20, 1995 |
| 5357167 |
High pressure discharge lamp with a thermally improved anode |
Oct. 18, 1994 |
| 5343112 |
Cathode arrangement |
Aug. 30, 1994 |
| 5258687 |
Mercury vapor discharge device |
Nov. 2, 1993 |
| 5198720 |
Direct heating cathode structure for cathode ray tubes |
Mar. 30, 1993 |
| 5172027 |
Wire shaped electron source |
Dec. 15, 1992 |
| 5138221 |
Inorganically insulated heater, and cathode ray tube and air flow sensor using the same |
Aug. 11, 1992 |
| 5001397 |
High-pressure gas discharge lamp having electrodes with coil layers having interlocking turns |
Mar. 19, 1991 |
| 4973878 |
Filament structure and method of making such structure |
Nov. 27, 1990 |
| 4939411 |
Composite vacuum evaporation coil |
Jul. 3, 1990 |
| 4918354 |
Compact coiled coil incandescent filament with supports and pitch control |
Apr. 17, 1990 |
| 4893057 |
High intensity discharge lamp and electodes for such a lamp |
Jan. 9, 1990 |
| 4886995 |
Heater for indirectly-heated cathode |
Dec. 12, 1989 |
| 4847534 |
High-pressure discharge lamp with torsionally wound electrode structure |
Jul. 11, 1989 |
| 4825119 |
Low consumption electron gun for cathode ray tubes |
Apr. 25, 1989 |
| 4760306 |
Electron emitting filaments for electron discharge devices |
Jul. 26, 1988 |
| 4745325 |
Heater for indirect-heated cathode |
May. 17, 1988 |
| 4733124 |
Cathode structure for magnetron |
Mar. 22, 1988 |
| 4728850 |
Mounting means for mounting spiral wire cathodes |
Mar. 1, 1988 |
| 4686412 |
Reflector-type lamp having reduced focus loss |
Aug. 11, 1987 |
| 4683397 |
Compact incandescent coiled coil filament |
Jul. 28, 1987 |
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