Mounting means for mounting spiral wire cathodes
AssigneeLeybold-Heraeus GmbH
InventorsReinhardt Kraft, Horst Ranke
Life of this patent
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Abstract
In a mounting device for electrically heated, spirally wound wire cathodes in electron guns, two mounting posts joined together by an insulator are configured as sector-shaped sections of a hollow cylinder, and have each a circumferential groove on its end remote from the insulator. The surfaces defining the grooves are parts of common circular and cylindrical surfaces, and the mounting ends of the cathodes are of a configuration approximately complementary to that of the grooves in the mounting posts. The mounting ends therefore lie in a spring-biased and form-fitting manner in the circumferential grooves.
Claims6
An electron gun comprising a cathode bent spirally from wire and a clamping means, said clamping means comprising a pair of supporting posts, said supporting posts shaped as sections of a hollow cylinder, an end of each post meeting an insulator, and a second end of said posts remote from said insulator meeting end, said remote ends having a circumferential groove adapted for reception of a mounting end of said cathode, each of said grooves defined by a portion of two common circular surfaces and one cylindrical surface, the mounting ends of said cathode configured complementary to said grooves and adapted for lying in said grooves in a spring biased and form-fitting manner.
Dependencies are inferred from the claim text.