Triple-coil incandescent filament

Details Triple-coil incandescent filament Triple-coil incandescent filament

1979-12-19

1982-02-16

LaRoche, Eugene R.

Electric lamp and discharge devices

Electrode and shield structures

Filament or resistance heated electrodes

313326, H01K 114

Patent

active

043161162

ABSTRACT:
This invention relates to multiple coiled incandescent filaments and more particularly to a single strand filament wire, coreless, triple-coil filament for an incandescent lamp having mandrel ratios in either or both its second or third coiling less than 1.0.

REFERENCES:
patent: 1180159 (1916-04-01), Langmuir
patent: 1247068 (1913-10-01), Benbow
patent: 2142865 (1939-01-01), Zabel
patent: 2306925 (1942-12-01), Aicher
patent: 2774918 (1956-12-01), Lemmers
patent: 4208609 (1980-06-01), Berlec

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