Stable electrode design and method

Details Stable electrode design and method Stable electrode design and method

2006-09-05

2006-09-05

Williams, Joseph (Department: 2879)

Electric lamp or space discharge component or device manufacturi

Process

Electrode making

Reexamination Certificate

active

07101245

ABSTRACT:
A method of making a unitized tungsten electrode which exhibits superior mechanical and electrical properties which includes providing a length of cylindrical cut stock having a predetermined diameter and length. The stock is ground to form a rough unfinished electrode having an enlarged tip or nose portion at one end integrally connected to an elongated shank section. The unfinished electrode is treated by exposure to a chemical etchant for a time sufficient to form a finished electrode characterized by a smooth nose and shank surface and rounded undercut and ends. The invention includes the electrode formed by the described process.

REFERENCES:
patent: 4652462 (1987-03-01), Nishizawa et al.
patent: 5690532 (1997-11-01), Sims

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