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Class Information
Number: 313/37
Name: Electric lamp and discharge devices > With temperature modifier > For filament or heated cathode
Description: Devices which are provided with a filament, a directly heated cathode or an indirectly heated cathode and which include means to modify the temperature of the filament or cathode.

Sub-classes under this class:

Class Number Class Name Patents
313/38 Hollow shield around filament or cathode 15

Patents under this class:

Patent Number Title Of Patent Date Issued
7759849 High-power discharge lamp Jul. 20, 2010
7741615 High energy crystal generators and their applications Jun. 22, 2010
7728494 Light emission device and display device Jun. 1, 2010
7714487 Discharge lamp, method for manufacturing the discharge lamp electrode, lighting system May. 11, 2010
7701139 Electric discharge lamp Apr. 20, 2010
7487781 Energy converter and method of making the same Feb. 10, 2009
7414356 Cathode structure including barrier for preventing metal bridging from heater to emitter Aug. 19, 2008
6858973 Cooling an electronic tube Feb. 22, 2005
6765339 Infrared lamp and procedure for heating material to be processed Jul. 20, 2004
6724160 Ion-source neutralization with a hot-filament cathode-neutralizer Apr. 20, 2004
6552479 Cathode ray tube having an improved heater Apr. 22, 2003
6469447 Fluorescent lamp lighting apparatus Oct. 22, 2002
6335590 Cathode ray tube having an indirectly heated cathode provided with a heater having a structure which substantially prevents cracks in an insulating coating thereof Jan. 1, 2002
6191528 Cathode ray tube having an improved indirectly heated cathode Feb. 20, 2001
5977692 Annulus fluorescent lamp with overheat protection Nov. 2, 1999
5844364 Incandescent light-emitting assemblies Dec. 1, 1998
5818161 Electron gun cathode holder with manufacturing holes Oct. 6, 1998
5444327 Anisotropic pyrolytic graphite heater Aug. 22, 1995
5402035 Cathode structure for an electron tube Mar. 28, 1995
5289076 Cathode structure for a cathode ray tube Feb. 22, 1994
5095241 Cooling structure for cathode in electron beam generator Mar. 10, 1992
5033072 Self-limiting x-ray tube with flat cathode and stair-step focusing device Jul. 16, 1991
5027029 Indirectly heated cathode assembly and its associated electron gun structure Jun. 25, 1991
5015908 Fast warm-up cathode for high power vacuum tubes May. 14, 1991
5001385 Electron beam apparatus with adjusting mechanism for a thermally emitting cathod tip Mar. 19, 1991
4972115 Hot-cathode type low-pressure rare gas discharge lamp Nov. 20, 1990
4899078 Thermionic hairpin cathode Feb. 6, 1990
4583023 Electron beam heated thermionic cathode Apr. 15, 1986
4551648 Line cathode heater and support structure for a flat panel display device Nov. 5, 1985
4546286 Electron tube, in particular a transmitter tube Oct. 8, 1985
4409512 Incandescent electric lamp with etalon type transparent heat mirror Oct. 11, 1983
4370588 Cathode assembly Jan. 25, 1983
4236097 Ion source having fluid-cooled supply conductors Nov. 25, 1980
4216405 Large, indirectly heated, oxide-coated cathode for producing uniform plasmas Aug. 5, 1980
4189656 Cathode structure for a high power laser Feb. 19, 1980
4009409 Fast warmup cathode and method of making same Feb. 22, 1977
3995187 Electrode type glow discharge apparatus Nov. 30, 1976
3974414 Cathode ray tube cathode Aug. 10, 1976
3958146 Fast warm up picture tube cathode cap having high heat emissivity surface on the interior thereof May. 18, 1976
3947715 Fast warm up cathode for a cathode ray tube Mar. 30, 1976

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