Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Apparatus for mounting a field emission cathode










Image Number 2 for United States Patent #4687964.

A field emission cathode 12 is positioned in a pair of intersecting cross grooves 30, 32 in the end of a ceramic tube 14 by a metal end cap 24. A spring 34 in electrical contact with the base of the cathode provides the necessary pressure to maintain continuous circumferential electrical contact between the gate film and a raised edge 38 on the end cap. With this structure the cathode chip is self-centering and easily replaceable. Also the gate film of the cathode is not abraded or rubbed during installation, and the holder is readily degassed.








 
 
  Recently Added Patents
Artificial engine sound control unit, approaching vehicle audible system, and electric vehicle having them
Diazeniumdiolated phosphorylcholine polymers for nitric oxide release
Compositions for inhibiting NADPH oxidase activity
Sweetener compositions having enhanced sweetness and improved temporal and/or flavor profiles
Perfume bottle
MEMS structure and method for making the same
Microcapsules, their use and processes for their manufacture
  Randomly Featured Patents
Methods and apparatus for electrophoretic mobility determination using phase light scattering analysis
Silicon carbide sintered members
Carbon black tailgas fueled reciprocating engines
Spatula attachment for electric knife drive unit
Viscous power motor for equipment
Method for molding polypropylene resin
Non-volatile semiconductor memory
Medical linear actuator for surgical delivery, manipulation, and extraction
Method and system for controlling the brightness of a vacuum fluorescent display
Golf glove