Abstract: The invention concerns a device for detecting the displacement of an object comprising a ferromagnetic material. Said device comprises a magnetic circuit generator provided with first and a second cores made of ferromagnetic material and an excitation coil and a measurement coil. The magnetic circuit generator is connected to a detecting unit designed to detect a reluctance variation brought about in the circuit by the displacement of the object and to deduce therefrom its position. In said device the magnetic circuit generator comprises first and second transformers with open magnetic circuit, said transformers being juxtaposed and comprise each an axis extending across their respective core, said axes extending substantially perpendicular to said path. The excitation coil comprises two coils connected in series which form the primary windings of the first and second transformers.

Abstract: The invention concerns satellite radionavigation, especially GPS (Global Positioning System), Galileo, GLONASS (Global Navigation Satellite System, Russian definition) type satellite radionavigation, etc.

Abstract: The invention relates to an apparatus for determining postures, in particular the attitude (&thgr;) and the inclination (&phgr;) of an aerodyne, comprising: a strap-down gyrometer device providing the components of the vector ({right arrow over (&OHgr;)}) of instantaneous rotation of the aerodyne, means for calculating, from gyrometric measurements, a matrix of postures ({right arrow over (b)}1, {right arrow over (b)}2, {right arrow over (b)}3), accelerometers integral with the said gyrometric device, and means for comparing data calculated from the accelerometers with data calculated from the gyrometers so as to provide corrections for compensating for the errors or drifts of the gyrometric device. This apparatus is characterized in that the comparison is performed between a vertically directed vector {right arrow over (U)}g provided by the gyrometric device and a vertically directed vector {right arrow over (U)}a provided by the accelerometers.

Abstract: Photometer comprising a photo diode, arranged for producing an electric current, proportional to the intensity of picked-up light, the photo diode being linked by the intermediate of a resistance to an operational amplifier equipped with a bandpass filter, the value of the resistance is sized in such way as to level the resonance peak in the pass-band of the filter.

Abstract: The present invention relates to the field of pyrotechnic igniters, especially those intended for motor-vehicle safety. The igniters (1) according to the invention have a thin-film resistive bridge (19) connected via two thin metal areas (17 and 18) to two electrodes (9 and 10). An initiating lacquer (20) covers the resistive bridge (19) and a varistor attached to the said areas protects the igniter from electrostatic discharges. The resistive bridge (19) has a volume resistivity of between 0.5×106 and 2×106 &OHgr;.m and the initiating lacquer is made from a primary explosive. The igniters (1) have a no-fire current of greater than 500 mA and an all-fire current of less than 1200 mA.

Abstract: A pelletizer comprises a knife head, which is mounted by a denture coupling on a rotatably drivable shaft. The denture coupling comprises at least one serrated ring mounted on the knife head and on the shaft, respectively, the serrated rings having a frontal tooth system and intermeshing. Furthermore, a chucking arrangement of the type of a collect chuck is provided for releasably locking the knife head and the shaft in the direction of their axis.