Vacuum sealed incandescent lamp with improved filament support s

Details Vacuum sealed incandescent lamp with improved filament support s Vacuum sealed incandescent lamp with improved filament support s

1996-02-27

1997-08-19

Patel, Ashok

Electric lamp and discharge devices

With gas or vapor

Incandescent filament lamp

313623, 313275, 313279, 313315, 313331, H01K 122, H01K 138

Patent

active

056592221

ABSTRACT:
A subminiature incandescent lamp has a substantially cylindrical base to which a glass envelope enclosing the interior of the lamp is sealed. A pair of contact wires or pins are made of a metal alloy that has substantially the same thermal expansion coefficient as the glass base. The contact pins are embedded and sealed to the glass base in a gas-tight manner, with a glass-to-metal seal. The contact pins extend below the base to provide external connections of the lamp to a power source. The pins also extend into the interior of the lamp, and provide electrical contact to a filament which is mounted between them. A filament support wire is anchored in the glass base at one end thereof and has a loop at its other end in which the mid-section of the filament rests and is mechanically supported.

REFERENCES:
patent: 3413054 (1968-11-01), Richards et al.
patent: 3465197 (1969-09-01), Martin
patent: 4254300 (1981-03-01), Thompson-Russell
patent: 4587454 (1986-05-01), Bonazoli et al.
patent: 4644220 (1987-02-01), Carley
patent: 4893050 (1990-01-01), Fields
patent: 5270609 (1993-12-01), Smith et al.
patent: 5508587 (1996-04-01), Williams et al.

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