Electric lamp and discharge devices – With electrical shield or static charge distribution means
Patent
1991-04-08
1993-11-02
Yusko, Donald J.
Electric lamp and discharge devices
With electrical shield or static charge distribution means
313112, 313111, 313117, 362 61, 362293, 359582, 359585, H01J 516
Patent
active
052586863
ABSTRACT:
An automotive lamp device includes a metal lamp housing having an opening for passing light therethrough, an electric-discharge lamp accommodated in the lamp housing to provide a required amount of light to be emitted by the lamp device, a lens having a series of modified prisms or ridges that bend the light beam generated by the discharge lamp into a desired pattern, a finisher disposed in an inner perimeter section other than a main lens section of the lens, for preventing propagation of the light beams through a section other than the main lens section of the lens. The finisher is made of metal and, in addition, electromagnetic shielding is employed in the lens for preventing undesirable electromagnetic radiation noise generated by the discharge lamp from leaking through the lens to the exterior of the lamp housing, while allowing the required amount of light to pass through the lens.
REFERENCES:
patent: 3007160 (1961-10-01), Halpern
patent: 4642514 (1987-02-01), English et al.
patent: 4766526 (1988-08-01), Morimoto et al.
patent: 4811179 (1989-03-01), Komatsu et al.
Service Manual, vol. 538, issued by Nissan Motor Co., Ltd. Aug. 1987.
Ashida Takashi
Segoshi Toru
Horabik Michael
Nissan Motor Company Ltd.
Yusko Donald J.
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