Illumination – Vehicle steering mechanism or element moves pivoted lamp or... – Tie rod element controlled
Patent
1992-05-26
1993-08-17
Dority, Carroll B.
Illumination
Vehicle steering mechanism or element moves pivoted lamp or...
Tie rod element controlled
362226, 362802, B60Q 100
Patent
active
052374890
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention related to a headlight for motor vehicles. More particularly it relates to a headlight for motor vehicles which has a reflector and a gas discharge lamp inserted in the reflector and supplied with high voltage by an electrical pre-switching device.
Such a headlight is known from DE-OS 35 19 611. This headlight has a reflector with a gas-discharge lamp inserted in an electrical pre-switching device. The pre-switching device serves to supply high voltage to the gas-discharge lamp and is tightly connected with the reflector. To exchange the gas-discharge lamp, which is not provided for in this headlight, it is necessary to remove the pre-switching device. But this is impossible without destroying the sealed connection between the pre-switching device and the reflector. Moreover, there is a danger of fatal injury when exchanging the gas-discharge lamp if special precautions are not taken because of the high voltage applied to the gas-discharge lamp for its operation.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a headlight for motor vehicles, which avoids the disadvantages of the prior art.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a headlight for motor vehicles in which the gas discharge lamp is inserted in the reflector through a lamp support, the lamp support and the gas discharge lamp are covered at the rear by a detouchable protective cap and an electrical line is connected with the pre-switching device with a switch arranged in the line and openable when the protective cap is removed, while the operation of the gas discharge lamp is prevented when the switch is opened.
When the headlight is designed in accordance with the present invention, it has the advantage that it is possible to exchange the gas-discharge lamp without destroying structural component parts and without risk of fatal injury, since the gas-discharge lamp can not operate when the protective cap is removed.
In accordance with another feature of the present invention the switch can be actuated by magnetic forces and is arranged at the lamp support or at the protective cap, and a magnet is arranged at the other part, lamp support or protective cap by which the switch is kept closed when a protective cap is mounted.
In accordance with still another feature of the present invention, the protective cap can be fastened in a detachable manner by a catch connection. With this construction of the switch, the switch can be actuated without mechanical contact between the lamp support and the protective cap when removing or mounting the protective cap.
In accordance with still a further feature of the present invention, the protective cap can be fastened at the reflector. The reflector can be arranged in a housing and the protective cap can be fastened at the housing.
The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a view showing a headlight for a motor vehicle in accordance with the present invention, in a vertical longitudinal section.
DESCRIPTION OF PREFERRED EMBODIMENTS
A headlight for motor vehicles shown in the drawing has a reflector 10. A gas-discharge lamp 12 held in a lamp support 11 is inserted into the crown area of the reflector 10 from the rear. The light emission opening of the headlight is covered by a light plate 13. The gas-discharge lamp 12 is connected via a line 15 with an electrical pre-switching device 14 which supplies it with the high voltage necessary for its operation. The electrical pre-switching device 14 is connect
REFERENCES:
patent: 4797790 (1989-01-01), Bradling et al.
Delb Fred
Kaiser Bernd
Kusserow Peter
Schmied Friedrich
Stein Jurgen
Dority Carroll B.
Robert & Bosch GmbH
Striker Michael J.
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