Electric incandescent lamp

Details Electric incandescent lamp Electric incandescent lamp

1976-12-09

1978-08-29

Smith, Alfred E.

Electric lamp and discharge devices

Electrode and shield structures

Filament or resistance heated electrodes

313341, H01J 116, H01K 114, H01J 1910

Patent

active

041106580

ABSTRACT:
An electric incandescent lamp having a rotational axis, includes a filament formed with a coil disposed in bowed form across the axis of the lamp, the length CL of the coil, measured along the mean curvature ML of the coil, being 3.6 to 6.2 times greater than the outside diameter OD of the coil and the height H of the coil, measured in the direction of the axis of the lamp, being 1.2 to 2.5 times greater than the outside diameter of the coil, and the distance A between each of the windings of the filament of the coil, measured along the mean curvature ML of the coil, being 0.3 to 1.2 times as great as the diameter WD of the filament of the coil.

REFERENCES:
patent: 2060506 (1936-11-01), Knowles

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