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AssigneeNEC Corporation
InventorsTakayoshi Konishi, Osamu Yamamoto
Estimating the term…
For use in vacuum between a cathode (21) and an anode (23) with avoidance of surface flashover resulting from a voltage supplied between the cathode and the anode, a dielectric spacer (25) has a side surface and a projection (27) protruded perpendicularly of the side surface. The projection has a length of projection from the side surface, a cathode side end having a cathode distance relative to the cathode, an anode side end, and a thickness having a center plane between the cathode and the anode side ends and nearer to the cathode than to the anode, a ratio of the length of projection to the cathode distance being not less than 0.4. The cathode comprises no protrusion in a face to face relation to the anode side end. It is possible to use the dielectric spacer between two electrodes supplied with an AC voltage.
A dielectric spacer for use in vacuum between a cathode and an anode with avoidance of surface flashover resulting from a voltage supplied between said cathode and said anode, said dielectric spacer comprising:
A dielectric spacer for use in vacuum between first and second electrodes with avoidance of surface flashover resulting from an AC voltage supplied between said first and said second electrodes, said dielectric spacer having a side spacer surface and first and second projections protruded perpendicularly of said side spacer surface, wherein each of said first and said second projections has a length of projection from said side spacer surface, a thickness having a center plane nearer to one of said first and said second electrodes than to the other of said first and said second electrodes, and a side projection surface parallel to said center plane to have a projection distance relative to said one of first and second electrodes, a ratio of said length of projection to said projection distance being not less than 0.4.
Dependencies are inferred from the claim text.