Resources Contact Us Home
Apparatus for mounting a field emission cathode

Image Number 3 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
System and method for conditionally sending a request for data to a home node
Glycosyltransferase promoter
Touch-sensitive device and communication device
Combination therapy to enhance NK cell mediated cytotoxicity
Graphical planner
Electronic badge
Solid-state imaging device
  Randomly Featured Patents
Optical pickup device with diffraction device
Use of .gamma.-tocopherol and its oxidative metabolite LLU-.alpha. in the treatment of disease
Image sensor and method for forming the same
Multi unit electrical apparatus with dual inlet fan positioned opposite unit bays
Adaptor for transformer bushing terminals
Toner cartridge
Wheel unit
Word processor
Hydrogen storage material and hydrogen storage apparatus
Method and apparatus for dividing a conduit into compartments