Method for forming tungsten electrode

Details Method for forming tungsten electrode Method for forming tungsten electrode

1996-06-19

1997-11-25

Horabik, Michael

Electric lamp or space discharge component or device manufacturi

Process

Electrode making

205666, H01J 914

Patent

active

056905327

ABSTRACT:
A one piece electrode is disclosed for use in miniature and subminiature lamps having a large diameter post section and a smaller diameter lead-in section. The lead-in section is formed by an electrochemical process from a wire that has an outer diameter equal to the desired post diameter. A smooth evenly tapered transition section between the post and lead-in sections is created during the etching process which permits heat to pass through the electrode at a controlled and predictable rate.

REFERENCES:
patent: 3259778 (1966-07-01), Fridrich
patent: 3340718 (1967-09-01), Heisler
patent: 3497425 (1970-02-01), Cotton
patent: 4038579 (1977-07-01), Ekkelboom
patent: 4452677 (1984-06-01), Richardson
patent: 5083059 (1992-01-01), Graham et al.
patent: 5117154 (1992-05-01), Thomas et al.
patent: 5144201 (1992-09-01), Graham et al.
patent: 5527199 (1996-06-01), Feder et al.

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