Title:
INDIRECTLY HEATED ELECTRODE FOR GAS DISCHARGE TUBE
Document Type and Number:
WIPO Patent Application WO/2002/049071
Kind Code:
A1
Abstract:
An indirectly heated cathode (C1) for a gas discharge tube comprises a heater (1), a coiled-coil (2), a plate-like member (3), and a metal oxide (10). An electric insulating layer (4) is formed on the surface of the heater (1). The heater (1) is disposed inside the coiled-coil (2). The plate-like member (3) is extended inside the coiled-coil (2) serving as a discharge surface along the length of the coiled-coil (2) and is electrically connected to the coiled-coil (2). The plate-like member (3) is connected to the terminal, on the grounded side, of the heater (1) and thereby grounded. The metal oxide (10b) is held by the coiled-coil (2) and is in contact with the plate-like member (3). The metal oxide (10) is in contact with the mesh-like member (3).
Inventors:
Kawai, Koji c/o Hamamatsu, Photonics 1126-1 K. K. (Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
Application Number:
PCT/JP2001/010941
Publication Date:
June 20, 2002
Filing Date:
December 13, 2001
Export Citation:
Assignee:
HAMAMATSU PHOTONICS K.K. (1126-1, Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
Kawai, Koji c/o Hamamatsu, Photonics 1126-1 K. K. (Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
Kawai, Koji c/o Hamamatsu, Photonics 1126-1 K. K. (Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
International Classes:
H01J1/20; H01J1/24; H01J17/06; (IPC1-7): H01J61/067; H01J61/09
Attorney, Agent or Firm:
Hasegawa, Yoshiki (SOEI PATENT AND LAW FIRM, Okura-honkan 6-12 Ginza 2-chome Chuo-ku, Tokyo, 104-0061, JP)
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