Electron gun in which cathode shaft is freely suspended...

Details Electron gun in which cathode shaft is freely suspended... Electron gun in which cathode shaft is freely suspended...

H - Electricity

01

J

313/35.33

H01J 29/48 (2006.01) H01J 29/04 (2006.01)

Patent

CA 1173488

PHN. 9733 11 ABSTRACT: An electron gun for generating an electron beam, comprising a cathode unit composed of at least a cylindri- cal cathode shaft the end surface of which forms the emissive surface, which cathode shaft is surrounded coax- ially at least partly by a cylindrical metal heat reflec- tion screen, which screen overlaps the open end of the cathode shaft and which cathode shaft and heat reflection screen are secured in a cathode support, wherein the cathode shaft is suspended in the heat reflection screen so as to be self-supporting by means of metal strips or wires which are secured to the cathode shaft near the emissive surface and to the cathode support, has a larger efficiency than the cathodes known so far and has a short warming-up time.

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