Method for making cathodes for neon and argon gas filled tubes

Details Method for making cathodes for neon and argon gas filled tubes Method for making cathodes for neon and argon gas filled tubes

1990-01-29

1990-11-27

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

313288, 313289, 313618, H01J 918

Patent

active

049732820

ABSTRACT:
A method for making gaseous discharge lamp cathodes comprises, in order to perfectly center the cathode with respect to the tube glass envelope, the steps of: (a) narrowing the end portion of the metal cathode near the edge thereof, (b) fully inserting, about the narrowed zone, a circular crown shaped mica small collar and (c) upsetting the edge so as to lock the mica collar in place.

REFERENCES:
patent: 2030435 (1936-02-01), Fehse et al.
patent: 2491425 (1949-12-01), Stutsman
patent: 2677071 (1954-04-01), Carne

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