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Small fluorescent lamp, method and device for producing said small fluorescent lamp

A fluorescent lamp, compact technology, applied in the field of small fluorescent lamps, can solve the problem of unsatisfactory compactness, and achieve the effects of avoiding bad connections, having an aesthetic appearance, and improving luminous efficiency

Inactive Publication Date: 2007-01-17
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The compactness aspect of the lamp is also less satisfactory, since the sealed end increases the overall length of the coiled discharge tube

Method used

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  • Small fluorescent lamp, method and device for producing said small fluorescent lamp
  • Small fluorescent lamp, method and device for producing said small fluorescent lamp
  • Small fluorescent lamp, method and device for producing said small fluorescent lamp

Examples

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Embodiment Construction

[0035] see figure 1 and figure 2 , shows a low-pressure arc discharge lamp 1 . The lamp 1 has a discharge vessel 2 with an end 31 which is inserted into the lamp vessel 4 or cap. End 31 is sealed. figure 1 The lamp 1 shown has double helical discharge vessels 21 and 22 which are connected to each other at the upper ends of the tube parts 21 and 22 via a cryogenic chamber part 3 .

[0036]The discharge vessel 2 is mechanically supported by the lamp vessel 4 . The lamp envelope 4 surrounds the sealed end 31 of the discharge vessel 2 . More precisely, the sealed ends 31 of the tube parts 21 , 22 are inside the lamp envelope 4 , whereas the main parts of the tube parts 21 , 22 are outside the lamp envelope 4 . The lamp 1 is of the type in which light is emitted through a phosphor layer deposited on the inner surface of a discharge vessel 2, the phosphor being excited by a discharge arc. Electrons for the discharge arc are emitted from a heated filament (not shown). The fil...

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PUM

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Abstract

This invention concerns a compact fluorescent lamp with a double helix shaped discharge tube in which the two strands of the helix are constituted by two helix shaped tube portions. These tube portions define a central axis of the discharge tube. The double helix formed by the discharge tube has a central section and a first end section. These sections are defined along the central axis, and the lamp base for receiving ends of the tube portions is disposed at the first end section. An inner diameter of the central section of the helix is larger than an inner diameter of the first end section. The invention further relates to a method and apparatus for manufacturing coiled shaped discharge tubes, in particular the above described discharge tube of the discharge lamp. A radially segmented molding core is used for manufacturing the discharge tube. Once the coiling of the discharge tube on the molding core is completed, the segmented molding core is shrunk radially, and then is withdrawn from the coiled discharge tube axially.

Description

technical field [0001] The invention relates to compact fluorescent lamps with discharge tubes. The invention also relates to a method and a device for manufacturing the discharge vessel of the lamp. The invention also relates to a forming tool for use in the above method and device. Background technique [0002] Low pressure discharge lamps are well known in the art. These lamps include a small amount of mercury, which glows under the action of a discharge arc. In order to achieve maximum luminous efficacy, the discharge vessel of the lamp needs to be made as long as possible, which results in a larger luminous area. In order to achieve luminous efficiency comparable to that of traditional incandescent bulbs, it is necessary to use a discharge tube with a length of more than tens of centimeters. Such discharge tubes must be bent into various forms in order to make them small enough for lampshades and lamp housings originally designed for incandescent lamps. [0003] It...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J61/30H01J5/50H01J9/24H01J61/32
CPCY02B20/19H01J9/247H01J61/327Y02B20/00
Inventor J·托克斯S·卢卡克斯I·沃兴I·克伦伊
Owner GENERAL ELECTRIC CO