Title: Electrode-inlead for miniature discharge lamps

Abstract: An electrode-inlead assembly comprises a small tungsten pin which is joined on axis to a fine molybdenum wire adapted to sealing through fused silica. The join is effected by a laser butt weld which permits a symmetric compact seal thereby making possible very small discharge envelopes having minimum end losses. The seal may be effected either by a foliated portion in the wire which is wetted by fused silica, or by a glass bead formed around the wire which wets both wire and fused silica.

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Inventors: Hansler, Richard L. (Pepper Pike, OH, US)

Application Number: 900612
Filing Date: 1978-04-27
Publication_date: 1979-01-23
Assignee: General Electric Company (Schenectady, NY)
Primary Class(es): 313/623 174/50.61, 174/50.64, 219/121.63, 219/121.75, 313/331
Other Classes:
US Patent Ref:

3639722	Feb, 1972	Pagnotta et al.	219/127.
3701921	Oct, 1972	Wiedenmann	313/332.
3804529	Apr, 1974	Hansler	356/167.

Other Refs:
Primary Examiner: Rolinec, Rudolph V.
Assistant Examiner: Hostetter, Darwin R.
Attorney: Legree; Ernest W., Kempton; Lawrence R., Neuhauser; Frank L.