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Halogen incandescent lamps

An incandescent lamp and halogen technology, applied in the field of halogen incandescent lamps, can solve the problem of inoperability of the internal arc tube, and achieve the effect of eliminating strain and eliminating fire

Inactive Publication Date: 2008-11-26
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Furthermore, in lamps having a self-contained light source housed within and energized through a sealed outer casing, a safety switch or fuse is required that will allow the internal arc to flash if the hermetically sealed outer casing ruptures. Tube (arc tube) cannot operate

Method used

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  • Halogen incandescent lamps
  • Halogen incandescent lamps
  • Halogen incandescent lamps

Examples

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Embodiment Construction

[0026] Before these embodiments are explained in detail, it is to be understood that the invention is not limited in its application or use to the details of construction and arrangement of parts shown in the drawings and description. It can be appreciated that the exemplary embodiments according to the present invention can be implemented or included in other embodiments, alterations and modifications, and can be implemented or performed in various ways. Furthermore, the terms and expressions used herein have been chosen for the purpose of introducing the illustrated embodiments of the invention and for the convenience of the reader's understanding and not for the purpose of limitation unless otherwise specified.

[0027] End-of-life failure mechanisms can be classified as passive and non-passive. Changing the geometry of the arc tube to induce an end-of-life mechanism of passive failure in the lamp would improve product safety. The safety of the lamp of the present inventio...

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Abstract

A lamp has a base and a light-transmitting soft-glass lamp envelope sealed to the base to form a sealed lamp cavity which is filled with a non-oxidizing gas. Current supply leads are connected to the stem feedthroughs and extend into the lamp cavity. A halogen incandescent burner is located in the lamp cavity and has a light-transmitting hard-glass burner envelope which encloses a sealed burner cavity filled with an inert gas containing halogen. The burner envelope has presses at its ends. A tungsten filament coil in the burner has extended legs at its ends that extend out of the burner cavity into the lamp cavity through the burner presses and are connected to the current supply leads in the lamp cavity to act as fuses which open upon breach of the lamp envelope, thus preventing further burner operations.

Description

technical field [0001] This invention relates to material selection for fuses / safety switches in halogen incandescent lamps. The fuse consists of a metal conductor that does not degrade during normal operation of the lamp, but burns away, oxidizes, or ceases to conduct electricity during the gas change when the outer bulb ruptures. Halogen incandescent lamps include a base having a filament with one or both ends extending through its pressure seal and out of the base. More specifically, the protruding filament end extending beyond the lamp cap acts as a fuse or safety switch when the lamp cap is mounted in the sealed outer housing. The fuse / safety switch construction renders the lamp inoperable if the outer housing is ruptured and eliminates the fire hazard associated with the operation of an exposed halogen lamp cap. [0002] discussion of prior art Background technique [0003] Lamp safety is of paramount importance in the design of the lamp in order to protect the user...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01K1/16H01K1/66H01K1/50H01K1/34H01K1/38H01K1/40H01J17/18H01J61/36H01K1/18
CPCH01K1/34Y02B20/125H01K1/66Y02B20/00
Inventor E·瓦拉巴内尼J·P·伍兹
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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