Method of making an electric incandescent lamp, and electric lam

Details Method of making an electric incandescent lamp, and electric lam Method of making an electric incandescent lamp, and electric lam

1996-06-17

1997-10-21

Patel, Ashok

Electric lamp and discharge devices

With gas or vapor

Incandescent filament lamp

313269, 313273, 313275, 313276, 313278, 313279, 445 4, 445 32, H01K 114, H01K 306

Patent

active

056800096

ABSTRACT:
To permit easy assembly of a filament for a halogen incandescent lamp hav a filament holder frame (4) to retain an essentially planar filament (11) in position, the frame is made of two pre-manufactured identical frame halves (4a, 4b). Both frame halves have a cross element (7a, 7b), having a plurality of filament holders (10a, 10b) secured thereto, and two support strut portions (8a, 9a, 8b, 9b) at the ends thereof. To assemble the lamp, the two frame halves, together with the filament (11), are placed in a suitable jig, and the filament ends are threaded on one of the support strut portions (8a, 8b) of each one of the frame halves. The filament (11) is hooked on the filament holder (10a, 10b) and, by spreading apart the frame halves, the filament is stretched. The support strut portions (8a, 8b; 9a, 9b) are then connected by welding, thus completing the frame (4), and retaining the filament in stretched position. This permits mechanized assembly of the filament (11) in the frame (4) and, hence, inexpensive manufacture; separating the welding steps of the frame from filament connection reduces oxidation on part of the filament.

REFERENCES:
patent: 3555338 (1971-01-01), Scoledge
patent: 3870920 (1975-03-01), De Fraeye et al.
patent: 3909653 (1975-09-01), Bottone et al.
patent: 3986067 (1976-10-01), De Fraeye
patent: 4023060 (1977-05-01), Pike et al.
patent: 4145630 (1979-03-01), DeCaro et al.
patent: 4578616 (1986-03-01), Cardwell
patent: 4720653 (1988-01-01), Buschmann et al.

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