Electric lamp and discharge devices – With optical device or special ray transmissive envelope – Reflector
Patent
1997-12-08
2000-05-09
Patel, Vip
Electric lamp and discharge devices
With optical device or special ray transmissive envelope
Reflector
31331809, 3133181, 31331811, 439611, H01K 126
Patent
active
06060820&
DESCRIPTION:
BRIEF SUMMARY
Reference is made to the parallel application in Europe, EP-PA 97 105 626.2 and the corresponding ones which are based on DE-GM 296 07 132. Reference is expressly made to the latter.
1. Technical Field
The invention relates to electric lamps and particularly to electric lamps with reflectors. More particularly the invention is concerned with an internal mounting for an electric lamp to a reflector.
2. Background Art
Such a reflector lamp is already known, for example, from EP-A 572 400. There it was a matter of an incandescent lamp whose base is partially formed by an insert part on the end of the neck part of the reflector. This insert part must be attached to the neck part of the reflector by means of cement. The disadvantages of this base are that it is difficult to produce and does not fit very precisely. In addition, this type construction leads to an increase of the overall length of the reflector lamp, since space is needed to secure the insert part underneath the bulb in the neck portion.
Another base principle for contact pins with cylindrical thickened portions is described in DE-GM 82 34 509. There the cap for a low pressure discharge lamp is a separate part made of plastic.
It is the object of this invention to construct at a reasonable cost a reflector lamp and to lower the production costs.
DISCLOSURE OF THE INVENTION
A reflector lamp may be made with a reflector and base holding a hermetically sealed bulb. The bulb encloses a filling and a light source, the light source being a high voltage or medium voltage light source in which an operating voltage of at least 80 volts is present. The reflector consists of a basic body with a reflector contour and a neck part attached to a rear portion of the basic body, and a base which is joined to the neck part and which has at least two metallic contact pins with cylindrical seals on an end farthest from the bulb. A current feeder system makes an electrical lead available for use by the light source. The base is formed completely from the same material as the neck part and as an integral part directly on the neck part of the reflector.
The special value of the invention consists in the production of the lamp being significantly simplified and simultaneously the possibility being created of making the lamp more compact and in particular guaranteeing a high degree of operating safety for the lamp. The reflector lamp of this invention possesses significant cost and manufacturing advantages over the prior art.
Either a luminous element or an electrode is possible as the means of illumination (see for example the reflector discharge lamp in U.S. Pat. No. 4,935 660). The invention is especially suited for high voltage and medium voltage lamps. Use of the invention for low voltage lamps, however, is not ruled out.
A special advantage is the concept of the integrated base which makes it possible to so organize the lead wire system that there are no contact problems due to contact resistances which frequently occur in the low voltage range (below 80V) because of smaller contact surfaces for electrical connections. Consequently corrosion caused by age causes the high contact resistance which results in voltage drops in the supply lines. During operation a markedly lower voltage is applied to the means of illumination.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1, shows a preferred embodiment of an incandescent reflector lamp.
FIG. 2, shows a preferred embodiment of a discharge reflector lamp.
BEST MODE FOR CARRYING OUT THE INVENTION
Specifically the reflector lamp with a base on one side has the following features: a hermetically sealed bulb with a filling and a means of illumination, a reflector, consisting of a basic body bearing a reflector contour and a neck part placed on the basic body's back, a,base which is attached to the neck part and incorporates two or more metal contact pins with cylindrical thickened portions on the end away from the bulb, and a lead wire system which makes an electric supply line available for the means of illumination. The b
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Patent Abstracts of Japan, vol. 095, No. 011, Dec. 26, 1995.
Bauer Josef
Noll Thomas
Stark Roland
Meyer William E.
Patel Vip
Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen MBH
Williams Joseph
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