High voltage hard glass halogen capsule

Details High voltage hard glass halogen capsule High voltage hard glass halogen capsule

1988-08-24

1989-05-30

Moore, David K.

Electric lamp and discharge devices

With gas or vapor

Incandescent filament lamp

313315, H01K 118

Patent

active

048354430

ABSTRACT:
A high-voltage, low-wattage incandescent lamp having a tubular hard-glass envelope enclosing a coiled coil filament axially mounted with at least one, preferably two, intermediate filamentary supports. The lead-in wires and filamentary supports are mounted in the press seal of the lamp. Each end of the filament is mounted on an internal termination of a lead-in wire. The filament is mounted on the intermediate support(s) at point(s) along the filament body such that the body is divided into approximately equal segments or such that the operating temperature along the body is approximately uniform. Because of reduced filament sag, the tubular glass envelope has a reduced inner diameter and thinner wall thickness whereby the lamp may be more safely contained within an outer envelope in the unlikely event of a lamp burst. A lamp in accordance with the invention will exhibit enhanced operating characteristics and is well suited for applications in Europe.

REFERENCES:
patent: 3891885 (1975-06-01), Wurster
patent: 3930177 (1975-12-01), Martin
patent: 4316116 (1982-02-01), Graves et al.
patent: 4499401 (1985-02-01), Graves et al.
patent: 4598225 (1986-07-01), Gagnon
patent: 4683397 (1987-07-01), Johnson, Jr.
patent: 4686412 (1987-08-01), Johnson, Jr.
patent: 4743803 (1988-05-01), Lanese et al.

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