Cathode-anode spacer comprising a projection of a length limited

Details Cathode-anode spacer comprising a projection of a length limited Cathode-anode spacer comprising a projection of a length limited

1996-03-19

1997-06-10

O'Shea, Sandra L.

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

313292, 313250, 31323111, H01J 188

Patent

active

056379579

ABSTRACT:
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.

REFERENCES:
patent: 2063188 (1936-12-01), Parker et al.
By Wetzer, J.M. et al., "The Effect of Insulator Charging on Breadown and Consitioning", IEEE Transactions on Electrical Insulation, vol. 28, No. 4, Aug. 1993, pp. 681-691.
By Yamamoto, O. et al., "Monte Carlo Simulation of Surface Charge on Angled Insulators in Vacuum", IEEE Transactions on Electrical Insulation, vol. 28, No. 4, Aug. 1993, pp. 706-712.

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