Lamp filament

A base-up incandescent lamp (10) includes a coiled-coil filament (14) that has a primary wire (18) and a secondary wire (16), the primary wire (18) comprising an overwind that overlies the secondary wire (16) and provides a lower filament temperature and, therefore, less filament sag and a concomita...

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Bibliographic Details
Main Authors KASAK ALEXANDER N, SELL HEINZ W, LENEF ALAN L, FLEMING RAYMOND T, LI JASON J, LAIRD RICHARD C
Format Patent
LanguageEnglish
Published 02.06.2009
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC INCANDESCENT LAMPS
ELECTRICITY
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Summary:A base-up incandescent lamp (10) includes a coiled-coil filament (14) that has a primary wire (18) and a secondary wire (16), the primary wire (18) comprising an overwind that overlies the secondary wire (16) and provides a lower filament temperature and, therefore, less filament sag and a concomitant longer lamp life.
Bibliography:Application Number: US20060436001