Electric lamp having lamp vessel with improved pinch seal

Details Electric lamp having lamp vessel with improved pinch seal Electric lamp having lamp vessel with improved pinch seal

1998-09-29

2000-02-29

Day, Micahel H.

Electric lamp and discharge devices

With gas or vapor

Having electrode lead-in or electrode support sealed to...

313315, H01J 1718

Patent

active

060313315

ABSTRACT:
The electric lamp has a quartz glass lamp vessel (1) having first and second neck-shaped portions (2, 3) with first and second seals (4, 5). Current supply conductors (6, 7, 8; 9, 10, 11) consist of a metal foil (7, 10) embedded in the respective seal (4, 5), an inner (6, 9) and an outer current wire (8, 11) connected hereto. A seal ends with a closed fracture surface (14) through which an outer current wire (8, 11) extends. Favorably, the edge (13) of the fracture surface (14) has some small indentations (16) adjacent the origin of the fracture (19). The total length of the lamp is about 2 mm less than that of its conventional counterpart.

REFERENCES:
patent: 5025192 (1991-06-01), Okamoto
patent: 5286227 (1994-02-01), Numajiri et al.

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