Electric incandescent lamp

Details Electric incandescent lamp Electric incandescent lamp

1980-02-04

1982-01-19

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

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

For filament

313271, 313115, H01J 188, H01J 1942, H01K 118

Patent

active

043119409

ABSTRACT:
In electric incandescent lamps the efficiency can be increased by surrounding the filament with a light-pervious, infra-red radiation-reflecting filter. It has hitherto always been assumed that the geometry of the filter and that of the filament should be well matched to each other. This, however, results in a complex filament construction.
According to the invention, near the center of a spherical filter, a flat filament consisting of several parts is accommodated, being situated within a square the sides of which are from 0.25 to 0.04 times the diameter of the filter. Such a filament has a relatively simple construction and provides a highly efficient lamp despite the fact that its geometry is very different from that of the filter.

REFERENCES:
patent: 2784338 (1957-03-01), Woodward et al.
patent: 3445713 (1969-05-01), Cardwell, Jr.
patent: 3543962 (1970-12-01), Peterson
patent: 3909653 (1975-09-01), Bottone et al.
patent: 4023060 (1977-05-01), Pike et al.
patent: 4079283 (1978-03-01), George

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