Tubular incandescent lamp

Details Tubular incandescent lamp Tubular incandescent lamp

1979-07-02

1981-06-09

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For filament

313273, 313274, H01J 188, H01J 1950, H01K 118

Patent

active

042726980

ABSTRACT:
A long, tubular incandescent lamp has incorporated therein a filament formed by coupling light emitting segments and non-light-emitting segments alternately with each other. Each of the light emitting segments is composed of a light emitting coil and a coil-like coupling member of a larger pitch than the light emitting coil. Each of the non-light-emitting segments is composed of a bar formed to have a straight short-circuit part, bent portions at both ends thereof and supports respectively extending from the bent portions. The short-circuit part is inserted into the coil-like coupling member and these elements are then welded to each other to obtain the filament of alternately coupled light emitting and non-light-emitting segments. The composite filament is subsequently sealed in a long, tubular bulb. Thus, the resulting incandescent lamp is easily assembled, simple in structure, and highly shock resistant.

REFERENCES:
patent: 3194999 (1965-07-01), Heinlein
patent: 3295007 (1966-12-01), Young
patent: 3758807 (1973-09-01), Op de Beeck
patent: 4096405 (1978-06-01), Goto

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