Tubular incandescent lamp

Details Tubular incandescent lamp Tubular incandescent lamp

1979-07-30

1981-08-18

Walsh, Donald P.

Illumination

Elongated source light unit or support

With or including transparent or translucent member

313316, 313324, 362 11, 362219, 362225, 362240, F21S 300

Patent

active

042850320

ABSTRACT:
A tubular incandescent lamp which comprises an elongate transparent envelope; and a plurality of small lamps linearly arranged and extending lengthwise through the envelope, each of said small lamps containing a helically coiled filament and wherein the difference between the inner diameter of the envelope and the outer diameter of the respective lamps is chosen to be 2 mm or less.

REFERENCES:
patent: 3633023 (1972-01-01), Castiglioni
patent: 4020335 (1977-04-01), Bisceglia
patent: 4070594 (1978-01-01), Fuchi

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