Lamp filament design
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United States of America Patent
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N/A
Issued Date -
Oct 18, 2007
app pub date -
Mar 22, 2006
filing date -
Mar 22, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Disclosed is an electrode assembly for use in a lamp that includes, among other elements, a helical filament, and first and second electrode support wires. The helical filament has an inner coil conductor that includes at least first and second zones of pitch formed along its length and wherein the first zone of pitch is coiled at a first pitch, and wherein the second zone of pitch is coiled at a second pitch that is less than the first pitch. The first electrode support wire is welded to the filament in the first zone of pitch and the second electrode support wire welded to the filament in the second zone of pitch.
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