Electric lamp and discharge devices – Incandescent lamps – Plural filaments or glowers
Patent
1982-03-25
1984-04-10
Chatmon, Saxfield
Electric lamp and discharge devices
Incandescent lamps
Plural filaments or glowers
313 1, 313274, 315 67, 315 68, H01K 900, H01K 118
Patent
active
044423748
ABSTRACT:
A tubular incandescent lamp for use in a fusing type lamp in a photocopy machine in which the lamp filament means is capable of operation at two different lengths on a selective basis as a function of the different lengths of paper that are to be reproduced by the copier. In one embodiment the filament means comprises a single linear filament with the contacts being taken at opposite ends of the filament for full length reproduction and along a predetermined length of the filament or shorter length of reproduction. In an alternate embodiment of the invention, two different length filaments are employed, each one selectively and mutually exclusively operated.
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Meade Steven L.
Morris Merle E.
Rice Lawrence M.
Chatmon Saxfield
Fraley Lawrence R.
GTE Products Corporation
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