Car gauge

G - Physics – 12 – B

Patent

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Details

G12B 11/04 (2006.01) G01D 11/28 (2006.01) G01D 13/28 (2006.01) G01P 1/08 (2006.01)

Patent

CA 2304877

Car gauge having a transparent prism in rear of a dial (11) so that a light from a light source illuminates a needle fitted over the dial (11) through the prism, including the prism (20) having a reflecting means for converging the light from the light source (30) toward a center part .theta. thereof, a shaft (40A) mounted in a through hole (23) in the prism (20) and having a concave part (40B) at a top part thereof, and a needle (40) having a third reflecting part for fitting at the center part .theta., the third reflecting part being fitted over the concave part (40B) of the shaft (40A) for reflecting the light directed toward the center part .theta. from the prism (20) toward the needle (40).

Cet indicateur de planche de bord d'automobile comporte derrière un cadrant (11) un prisme transparent tel que la lumière provenant d'une source lumineuse traversant le prisme vient éclairer une aiguille montée sur le cadrant (11). Le prisme (20) comporte un élément réflecteur faisant converger la lumière de la source lumineuse (30) vers une zone centrale .theta. de la source lumineuse. Un axe (40) monté par un trou traversant (23) dans le prisme (20) présente en son extrémité supérieure une partie concave (40B). Une aiguille (40), dont une troisième partie est réfléchissante, est montée sur la partie concave (40B) de l'axe (40A) permettant de réfléchir en direction de l'aiguille (40) la lumière renvoyée vers la zone centrale .theta. depuis le prisme (20).

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