Abstract: In a motor vehicle headlamp or the like, the required distribution of the light rays is achieved entirely by selecting an appropriate configuration for the reflector; the front glass is a plain glass having smooth front and rear surfaces. The reflector surface is, as far as possible, a plain paraboloidal surface, but is provided with elongate ribs in selected zones, to produce a spreading of the light rays reflected from these ribs; the light is spread transversely to the length of the ribs. The reflector surface also has offset portions which, like the basic reflector shape, are paraboloidal, but have their focus or foci displaced from the focus of the basic reflector shape.
Abstract: A vehicle headlamp is constructed with its reflector and front lens adapted to be fixedly mounted in the bodywork of the vehicle, but incorporates a beam deflecting system, in order that the direction of the beam may nonetheless be adjusted. In one form, the beam deflecting system comprises two Fresnel lenses, mounted face to face in a position to intercept the whole of the headlamp beam, one being equivalent to a diverging lens with cylindrical surfaces, and one being equivalent to a converging lens with cylindrical surfaces. In a neutral position, the effects of the two lenses cancel out, so that no deflection of the beam occurs. One of the lenses is movable in translation away from the neutral position, so that a deflection of the beam occurs, without any other change in the beam pattern. In modified embodiments, the stationary Fresnel lens is not used; instead, its effect is produced by using a reflector of modified shape.
September 29, 1980
Date of Patent:
August 17, 1982
Roland Gerard, Norbert Brun, Jacques Ricard
Abstract: A vehicle headlamp has a sealed optical unit comprising a front lens, a reflector having a rear opening, and a transparent cup-shaped pocket fitted in the rear opening of the reflector. The cup-shaped pocket projects forwards into the space between the reflector and the front lens, so that light rays from a light bulb mounted within the pocket can reach the reflecting surface of the reflector, but the reflecting surface of the reflector is nonetheless inaccessible to contaminants from outside the headlamp. The lower part of the reflector should not reflect light rays from the light bulb, or at least from a dipped-beam filament of the light bulb, in order to avoid unwanted upwardly-directed rays being produced by the headlamp.
Abstract: During acceleration and deceleration the front end of the body of a motor vehicle dips or rears on the suspension causing light beams from the headlamps to be directed upwards or downwards too much. To avoid this the orientation of a headlamp is variable by pivoting the lamp relative to the vehicle body, about a horizontal axis extending transversely of the body, in response to operation of an orientation control which responds to acceleration and deceleration.
Abstract: A headlamp has a shell containing a bulb and reflector. The shell has a front opening which is closed by a glass front lens, and a planar plastics protective screen. If the lens should be broken, the screen will normally prevent broken glass and other contaminants from reaching and damaging the reflector.
Abstract: The invention relates to an automobile headlight comprising a light source, a reflector and a cover glass, wherein zones of the reflector giving rise to a concentration of the rays reflected on the cover glass are concealed, thus minimizing the heating of the glass, without substantially disturbing the luminous efficacy.
Abstract: A motor vehicle headlight having a casing containing a pivotally mounted reflector which is pivoted in response to movement of a piston rod of a hydraulic piston and cylinder unit at an end of a hydraulic remote control system. The casing has an opening so positioned that when the unit is fitted therein the piston rod can easily engage a force transmission arrangement acting on a periphery of the reflector to pivot it when the rod is moved.
Abstract: The present invention relates to a headlight for automobile, with rectangular front opening, of the type comprising a reflector in the axis of which are disposed a light source for dipped-beam illumination cooperating with cut-off means, and a light source for far-beam illumination, a horizontal upper side and a horizontal lower side intersecting the reflector to delimit the rectangular opening of the headlight, wherein the upper side is substantially closer to the optical axis than the lower side, with the result that, for a total, unchanged height of the headlight, the zone of the mirror furnishing the dipped-beam illumination is reduced, this allowing an optimum compromise for far-beam and dipped-beam illumination.
Abstract: The invention relates to sealed beam units for automobile vehicles and more particularly to a sealed beam unit with rectangular opening contour, characterized:(a) by a reflector limited to the optically useful parabolic surface corresponding to the opening contour chosen,(b) by a glass of enveloping form comprising a front face and connecting parts connecting the front face to the outer edge of the reflector.The invention brings advantages in manufacture and in constitution.
Abstract: This invention relates to a motor vehicle headlamp lens.It is characterized in that at least one zone of ribs is formed by ribs of variable cross-section, so that the optical deflection effect varies from one point of the rib to another.Improvement of the characteristics of the beam passing therethrough.
Abstract: A headlamp assembly comprises an optical unit adjustable mounted within an outer shell (24), which may in some cases be part of the vehicle bodywork. The optical unit comprises a reflector (10), a lens (not shown) permanently bonded to the front of the reflector, a main lamp (20), and a side-light bulb (54) in a lamp-holder (14). The rear of the outer shell (24) is closed by a one-piece seal (30) molded in an elastomer, which seal has a central portion (34) which lies against the rear of the reflector (10), to seal off the space between the shell and the reflector from the electrical connections to the lamps (20, 54). The side-light holder (14) is mounted from the rear in a passage (50) in a thickened portion (48) of the seal (30). The central portion (34) of the seal is connected to the portion (32) connecting the seal to the shell (24) by a flexible re-entrant sleeve or bellows portion (36, 38), which accommodates adjusting movements of the optical unit.
Abstract: A motor vehicle headlamp lens has two zones A1 and B containing ribs of different width to produce different amounts of lateral spreading of the headlamp beam. Between these zones a transition zone A2 is provided where a gradual change in the width of the ribs occurs. In the transition zone there are provided novel separating surfaces between the ribs having one surface at an angle to the general plane of the lens which act as a prism to deflect light passing therethrough in a downward direction. In zones A1 and B, and in transition zone A2 the total thickness e of the lens at the crest of any rib is constant.
Abstract: The present invention relates to an automobile headlight comprising a parabolic reflector, a front glass and a twin-filament lamp for far-beam and dipped-beam located on the optical axis of the reflector on either side of the focus thereof, said headlight being characterized in that a screen located in the front and in the upper part of the lamp defines on the reflector a zone which is struck only by the rays issuing from the far-beam filament. The corresponding zone of the front glass is also determined solely as a function of the far-beam filament.
Abstract: The invention relates to a device for ensuring the mechanical and electrical connection of an automobile headlamp, comprising at least one flat connecting pin, to a flexible printed supply circuit, said device comprising, for each pin of the lamp to be connected, a clip constituted by two homologous parts connected by a hinge and adapted to cooperate with each other along a plane of tightening, these two homologous parts comprising on their inner face means for positioning the pin inside the clip, means for retaining the printed circuit inside the clip, means for closing the clip ensuring its tightening so that the printed circuit is applied along the whole length of the pin of the lamp. The invention is more particularly applied to all automobile headlamps.
Abstract: The invention relates to a device for the joint control of the inclination of the headlights of an automobile, of the type comprising an electric motor-reduction gear mechanically coupled to each headlight to adjust the inclination thereof, each motor-reduction gear being of the type comprising, in series in its electrical supply circuit, an electrical switch actuated generator that the motor-reduction gear makes a predetermined rotation, and comprising a time base possessing at least one output and capable of supplying in controlled manner on said output a series of electrical pulses at intervals of time at least equal to the time necessary for the motor-reduction gears to make said predetermined rotation.
Abstract: The present invention relates to an indicator light, particularly for an automobile, comprising a catadioptric element such that its position in the light and the preferred orientation of certain of its catadioptric prisms allow a zone adjacent the zone normally imposed by the geometry of the light to be illuminated. The invention is more particularly applied to the corner lights of automobiles.