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Multiple filament parallel lamp

A filament and main filament technology, applied in the direction of discharge lamps, lamp circuit components, fixtures/supports of illuminants, etc., can solve the problem of reducing the impedance of the current

Inactive Publication Date: 2003-12-10
VENTUR RES & DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, long-life bulbs are made of a single, larger-sized filament and have a reduced resistance to electrical current, but these bulbs are not as economical as standard bulbs, but like standard bulbs, once they are single, Larger size filaments fail and must be replaced

Method used

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Embodiment Construction

[0016] The present invention is an improvement to electric lamps, which is mainly aimed at, but not limited to, prolonging the service life of incandescent lamps. In particular, the improvement includes the use of a spare filament (or filament section) to replace a broken main filament section, and the use of a bypass shunt to automatically alter the normal current path, ie, through the main filament section, to energize the spare filament. This improvement will significantly extend the operating life of the lamp due to the use of each additional filament segment and / or set of spare filament segments, while still maintaining a high visible light emissivity. Additionally, because the lamp changes are incorporated into the interior of the lamp, the improved lamp of the present invention can be inserted into any existing lamp socket.

[0017] figure 1 and 3An embodiment of a lamp of the present invention is shown, generally designated by the reference numeral 10, having a prima...

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PUM

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Abstract

An improvement to the usable lifetime of a lamp includes the use of a primary filament, a backup filament, and a means to switch portions of the backup filament into the current flow path after a portion of the primary filament open circuits. Using bypass shunts, which do not become electrically conductive until a portion of the primary filament open circuits, an open circuited portion of the primary filament can be electrically replaced with an associated backup filament portion to keep the lamp lit. The shunts in one embodiment are made of oxidized wire and are wrapped around the primary and backup filaments, in a spaced-apart relation, forming filament pairs consisting of a primary filament segment and its associated backup filament segment. In another embodiment, support brackets are used to not only support the primary and backup filaments, but are also used to provide the bypass shunt function as well.

Description

technical field [0001] The present invention relates to lamps. More particularly, the invention relates to multi-filament lamps. Typically, inside the lamp's glass envelope or bulb, a filament, usually made of tungsten, extends between two power terminals. This filament is basically an impedance which is heated when a voltage is applied across the above mentioned terminals and operates normally at about 2500°C in incandescent lamps and at much higher temperatures in halogen lamps Work. At these high temperatures, the filament emits a large amount of thermal radiation, which includes a considerable amount of visible light (when compared to the amount of visible light emitted at lower operating temperatures). Additionally, these high temperatures cause some tungsten molecules to sublimate from the filament and condense on the glass bulb. This causes the filament to become thinner and has a higher resistance to current flow, which causes the thinned filament portion to become...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J1/88H01J5/48H01J5/50H01J19/42H01K1/14H01K1/16H01K1/18H01K1/64H01K1/70H01K9/00
CPCH01K1/70H01K1/18H01K1/64H01K1/16H01K1/14
Inventor J·M·小吉博尼
Owner VENTUR RES & DEV
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