Accession Number : ADD005409

Title :   Controlled-Porosity Dispenser Cathode.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Thomas,Richard E ; Pankey,Titus , Jr

Report Date : 18 Jul 1978

Pagination or Media Count : 4

Abstract : An emissive member for a controlled-porosity, dispenser-type cathode comprising a three-component sandwich consisting of: (1) a supporting disc; (2) a layer of nonsintered alkaline earth material on said disc; and (3) a thin perforated foil on said layer. The foil is made of refractory metal and has a uniform pattern of tiny holes through which the active material of the reservoir migrates to coat the surface of the foil, the foil thus serving as the electron-emitting surface of the cathode. (Author)

Descriptors :   *Patents, *Cathodes, *Thermionic emission, Dispensers, Porosity

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE