Electric incandescent lamp

Details Electric incandescent lamp Electric incandescent lamp

1978-03-07

1979-12-18

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

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

For filament

313371, 313379, H01J 196, H01J 1950, H01K 118

Patent

active

041796365

ABSTRACT:
In tubular incandescent lamps having an axially arranged double-coiled filament on each support is present on a single-coiled part between two double-coiled parts of the filament. The single-coiled parts and the double-coiled parts have the same inside diameter, which enables a simple method of production, and hence have a different outside diameter. As a result of this a support provided on a single-coiled part cannot move onto a double coiled part. The construction results in lamps which have a usual operating life span which is closer to a desirable norm.

REFERENCES:
patent: 3194999 (1965-07-01), Heinlein
patent: 3392299 (1968-07-01), Kern
patent: 3736455 (1973-05-01), Notelteirs et al.
patent: 3760217 (1973-09-01), Martin et al.
patent: 3784865 (1974-01-01), Shanks
patent: 3982145 (1976-09-01), Liptow

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