Method of manufacturing a dispenser cathode and dispenser...

Details Method of manufacturing a dispenser cathode and dispenser... Method of manufacturing a dispenser cathode and dispenser...

H - Electricity

01

J

316/14, 316/47

H01J 9/02 (2006.01) H01J 1/28 (2006.01) H01J 9/04 (2006.01) H01J 29/04 (2006.01)

Patent

CA 1091291

ABSTRACT: A method of manufacturing a dispenser cathode in which a porous sintered molding of refractory metal impregnated with electron emissive material is embedded in a holder. The method consists of placing the molding in contact with a flat metal foil having a thickness of 10 to 100 microns and mechanically forming the metal foil into a holder surrounding the sides and the rear of the molding while leaving the front surface of the molding exposed by pressing the molding through an apertured die by means of a pressing tool. The molding acts as a plunger to draw the metal foil over the molding such that any gap between the molding and the sidewall of the holder is less than 10 microns wide.

283544

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