Resources Contact Us Home
Browse by Category: Main > Electrical & Energy
Class Information
Number: 313/338
Name: Electric lamp and discharge devices > Electrode and shield structures > Indirectly heated cathodes > Plural separate cathode sections
Description: Cathodes where the cathode is provided with a plurality of electron emissive sections which are electrically insulated from each other so that the cathode affords a plurality of electrically independent cathode sections.

Patents under this class:

Patent Number Title Of Patent Date Issued
8324590 Chopper for a particle beam Dec. 4, 2012
8000449 Emitter for X-ray tubes and heating method therefore Aug. 16, 2011
7855373 Charged particle gun Dec. 21, 2010
7781951 Filament lamp Aug. 24, 2010
7079093 Organic light emitting diodes display Jul. 18, 2006
6917147 Cathode structure with emissive layer formed on a resistive layer Jul. 12, 2005
6664545 Gate for modulating beam of charged particles and method for making same Dec. 16, 2003
6252341 Impregnated cathode having varying surface porosity Jun. 26, 2001
6184613 Electrode assembly, cathode device and plating apparatus including a gap configured to eliminate a concentration of a line of electrical force at a boundary between a cathode and plate forming Feb. 6, 2001
6181057 Electrode assembly, cathode device and plating apparatus including an insulating member covering an internal circumferential edge of a cathode member Jan. 30, 2001
5864201 Electron-optical device having separate elongate electron-emitting regions Jan. 26, 1999
5412281 Phase smoothing cathode for reduced noise crossed-field amplifier May. 2, 1995
5280218 Electrodes with primary and secondary emitters for use in cross-field tubes Jan. 18, 1994
5134343 Quasi-optical gyrotron having an electron gun with alternating high and low density electron emitting segments Jul. 28, 1992
5099170 Cathode supporting structure for color cathode-ray tube Mar. 24, 1992
5045749 Electron beam generator and electronic devices using such a generator Sep. 3, 1991
4994709 Method for making a cathader with integral shadow grid Feb. 19, 1991
4954745 Cathode structure Sep. 4, 1990
4931684 Digitally scanned extended electron source in vacuum Jun. 5, 1990
4686413 Cathode for magnetron Aug. 11, 1987
4680500 Integral grid/cathode for vacuum tubes Jul. 14, 1987
4524297 Thermionic cathode and method of manufacturing same Jun. 18, 1985
4489254 Magnetron Dec. 18, 1984
4380717 Magnetrons Apr. 19, 1983
4373144 Cathode arrangement for an X-ray tube Feb. 8, 1983
4359666 Cylindrical cathode with segmented electron emissive surface and method of manufacture Nov. 16, 1982
4302702 Thermionic cathode having an embedded grid, process for its fabrication, and high frequency electron tubes using such a cathode Nov. 24, 1981
4121130 Cathode structure and method of operating the same Oct. 17, 1978
4093893 Short arc fluorescent lamp Jun. 6, 1978
4031425 Dispenser cathode for a grid-controlled electron tube and method of manufacturing same Jun. 21, 1977
4020381 Cathode structure for a multibeam cathode ray tube Apr. 26, 1977
3978364 Integrated structure vacuum tube Aug. 31, 1976
3967150 Grid controlled electron source and method of making same Jun. 29, 1976

  Recently Added Patents
Performance monitoring of advanced process control systems
Voltage generating system and memory device using the same
Plural component proportioner
Isolation rings for blocking the interface between package components and the respective molding compound
Mobile device case with storage compartment
Method for the analysis of solid objects
Method and apparatus for optimizing transmission diversity
  Randomly Featured Patents
Piezoelectric component with predetermined breaking point and method for manufacturing and using the component
Method for manufacturing an electro-optical device
Output conductance correction circuit for high compliance short-channel MOS switched current mirror
I/O device having check recovery function
Manufacturing method for semiconductor chips
Apparatus and method for credit based management of telecommunication activity
Method and circuit for temperature nonlinearity compensation and trimming of a voltage reference
Optical filter suitable for portrait photography