Abstract: The invention relates to a method for assembling together two parts of headlights or lights for automobile vehicles, the first of said parts being made of an inorganic material and the second of a thermoplastics material not able to be directly fixed to the first by adhesion, wherein a connection element is partially introduced into the second thermoplastics part so that a part of said element projects and acts as free anchoring element, and the two parts are then assembled together by the depositing of a layer of glue which, on the one hand, adheres to the first part and, on the other hand, completely covers the said free anchoring element.

Abstract: A mounting arrangement for an accessory headlamp which allows the azimuthal direction of the headlamp beam to be adjusted and locked independently of the inclination of the beam. The mounting comprises a mounting bolt having larger and smaller diameter threaded portions separated by a shoulder. The smaller diameter portion passes through a mounting hole in the vehicle body and is secured by a nut, with the shoulder in contact with the body surface. The larger diameter portion receives a nut forming part of a clamping mechanism for the headlamp, which is pivoted to the top of the mounting bolt but can be locked by the clamping mechanism. In a modification, the larger diameter nut is replaced by a cam mechanism.

Abstract: The invention relates to methods and devices for determining the position of the cut-off of the light beam from a motor vehicle headlight. A pair of light detectors D.sub.c and D.sub.1 are located on a screen and the headlight and screen moved relatively to one another until the light intensities I.sub.c and I.sub.1 satisfy the relationI.sub.c = aI.sub.1 + bwhere a and b are given parameters such that when the said relation is satisfied, the position of the cut-off is indicated by the position of the detecting system D.sub.c.

Abstract: A pair of vehicle headlamps have front surfaces which are inclined to a central longitudinal plane and the optical axes of the headlamps. Each lens is provided with deflector elements affording a pair of rear surfaces of which one is inclined to the optical axis and one is parallel thereto.

Abstract: A motorcycle headlamp control system includes a ramp connected to the lower end of the front suspension and a lever connected to the upper end. The lever actuates a hydraulic transducer to vary the inclination of the headlamp.

Abstract: A motor vehicle headlamp system has an adjusting mechanism which causes the dipped beam briefly to be raised and deflected sideways, to improve vision, when the main beam is extinguished.

Abstract: A motor vehicle headlamp with a front glass having first prismatic surfaces which raise the horizontal cut-out line of one half of the dipped beam on the side of the road on which the vehicle is travelling so that the cut-out line consists of two horizontal lines joined by an oblique line, the lower horizontal cut-out line being on the side along which traffic travels in the opposite direction. A second prismatic surface is provided on the headlamp glass alongside the first prismatic surfaces. This second prismatic surface constitutes a window which directs a beam of light above the upper cut-out line of the dipped beam to illuminate objects on the vehicle's side of travel above the level of upper cut-out line.

Abstract: A vehicle headlamp has a paraolic mirror with a lamp having a dipped beam filament disposed in front of the focus of the mirror. A front lens is adapted to be rigidly secured to the vehicle body whilst an auxiliary lens is mounted between the front lens and the lamp. The auxiliary lens is rigidly connected to the mirror so as to be movable therewith.