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Fuse-like halogen burners as a step towards improved degree of lamp miniaturization

IP.com Disclosure Number: IPCOM000145759D
Publication Date: 2007-Jan-26
Document File: 4 page(s) / 73K

Publishing Venue

The IP.com Prior Art Database

Abstract

ID297709

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Fuse-like halogen burners as a step towards improved degree of lamp miniaturization

Abstract

A halogen lamp with a highly improved degree of flatness and a miniaturization is disclosed. A new type of ultra-thin halogen burners is used with a ratio of bulb-diameter to coil-diameter smaller than 3. To enable such a ratio of smaller 3, the new type ultra-thin halogen burner has to use a thin bulb, advantageously a tubular bulb. Furthermore, the new type ultra-thin halogen burner has to be double-ended, in order to minimize space-requirements within the burner bulb, stabilize coil position and minimize pinch size. Furthermore, the new type ultra- thin halogen burner has to be low-voltage, in order to allow thicker wire and thereby avoid sagging of the coil.

The objective of an extremely miniaturized lamp is achieved by providing both ends of the above-described ultra-thin double-ended halogen burner with a fuse-like contact sleeve. The resulting fuse-like embodiment of the halogen burner allows toinsert the burner in clip- contacts, similar to those used for electrical fuses.

Background

The burner is given a fuse-like shape and thus allows making the smallest so far known low- voltage halogen burner (Fig. 1). Bulb diameters of 5 mm and smaller are possible.

The new type of electrical burner contacts are cap-like (see Fig. 2), similar to those used for electrical fuses. Such electrical cap-like contacts are much more robust than the normally used electrical pins of halogen burners. In addition, such cap-like contacts allow easier handling, because of their increased positioning tolerance.

Miniaturization in Halogen lamps is still limited by the size of the electrical bases. The combination of cap-like contacts and fuse-like burner shape allows to go for a new kind of bases for halogen burners, with clip contacts....