Abstract: The invention relates to a radar device comprising two antennae fed by the same emission means, but serving reception means which are separated at least in part into two channels, followed by exploitation means. It is applied, in particular, when the antennae have substantially the same main lobe, but side lobes or scatters which are at least in part different. The exploitation means are capable of considering as a false alarm any echo received with a level below a selected threshold in one of the reception channels.

Abstract: The invention concerns the radars jamming able to coherent side looking cancellation. From a jamming source (SBR), it is created two channels supplying respectively transmission amplifiers (AE1 and AE2) followed by antennas (AP1 and AP2) operating in different polarizations. The former at least of the two channels is subject to fast time variations with respect to the latter, for example with a line of programmable length (LLP).

Abstract: The device, a microwave pulse signal amplifier, includes an input (E), designed to be connected to a wideband reception head (A, H) suitable for picking up pulse emissions, on which continuous emissions can be superposed, a detection stage (1), connected to this input (E), and providing a rectified signal (SP1), and means for processing (2) the rectified signal (SP1) to establish a rectified pulse signal (SP4), rid of at least part of the effects of possible continuous emissions. The level of the continuous emissions is evaluated by a feedback loop (20, 21) activated (22) when there are no pulse emissions, and is subtracted from the level of the rectified signal (SP1).

Abstract: A dynamic image is recreated from an observation radar whose extractor supplies an output of blips which are stored. These blips are firstly subject to a range/azimuth processing, which enables the image to be constructed. Then, they are subject to a pre-display processing in order to determine the geometry of the image and its brightness, after which the actual display takes place.

Abstract: The so-called flight path of an aircraft is defined in the form of a set of successive target points (B.sub.i -1, B.sub.i, B.sub.i +1) with a target circle (CB.sub.i) associated with each target point. A navigation envelope (DN) is determined in she direction to this target, and a guidance envelope (DH) is determined in the direction of the next target, for each target point. Normally, the aircraft is in the navigation envelope, and reenters the guidance envelope, then the target circle (B.sub.i) after which it heads in the direction of the navigation envelope associated with the next target. In the contrary case, a mandatory switching envelope (DCF) determines the instant when the aircraft is to orient itself on the next target (B.sub.i +1).

Abstract: A flight recorder (MPV) is contained within a two-walled chassis (11, 13) of which the walls are separated by a fire-resistant material (12). The memory means consist of hybrid circuits (H1-H8) of the EEPROM type. These are associated with a control card that may act as a fuse, The hybrid circuits (H1-H8) are mounted so as to be pressure-resistant. The flight parameters are alternating recorded on two memory cards (MC1 and MC2) and also in their hybrid circuits.

Abstract: In a reciprocal microwave phase shifter of microstrip technology, a Ferrite substrate carries, on one side, a ground plane (PM) and, on the other, a microstrip line (LM). The lateral branches (CG2 and CD2) cooperating with a base (CC) to define a magnetic circuit come into direct contact with the Ferrite substrate (SF), be being, for example, equipped with a recess (ED2) in line with the passage of the microstrip line (LM).

Abstract: The invention comprises: a magazine containing a continuous ticket stock web delimited by weakened lines; a station for applying magnetic inscriptions on a ticket; means for printing on a ticket; an issuing station; and an endless belt wound over rollers, one of which rollers is the driver, to carry a ticket from the magazine as far as the issuing station. The endless belt is provided in the vicinity of the magnetic station and extends as far as a pair of intake rollers, remaining in contact with the end portion of the continuous ticket stock web, the magnetic inscription being effected before the separation of the ticket in question in relation to the continuous stock. A cutting station is positioned between the inscription station and the printing means. This enables, on the one hand, a synchronization of the intake of the tickets with the magnetic inscription and, on the other hand, a simultaneous inscription on a given ticket not yet cut off, as well as printing on the preceding cut-off ticket.

Abstract: The invention relates to a device for the processing a magnetic-track ticket, especially an air transport ticket, of the type comprising: an insertion station (G1, G2), a magnetic reading/writing station (19), an issuing station (G3, G4) and a belt (C1) wound in a closed circuit around rollers, one of which is a driving roller, and designed to drive the ticket along an internal path extending from the insertion station to the issuing station.

Abstract: A surface acoustic electric wave device of the type comprising, over a large face of a planar piezo-electric substrate, a first row of parallel conductive fingers having an individual geometry chosen and distributed according to a chosen distribution arrangement along this row, a second row of parallel conductive fingers having an individual geometry chosen and distributed according to a chosen distribution arrangement along this row, the second row being interspaced from the first so as to allow a propagation of surface acoustic waves between the fingers of the first row and those of the second, which imparts to the device spectral and/or temporal characteristics defined by the acoustic propagation and the frequency selectivity due to the geometry of the fingers.

Abstract: The invention concerns electric/acoustic input transducers and acoustic/electric output transducers, in particular for a surface wave device, of the type comprising on a large face of a planar piezoelectric substrate: (i) two conductive input zones or output zones separated by a substrate band over which there extend respective parallel fingers which are interlaced according to a pattern chosen to form a row of fingers along this band, the general direction of the band being inclined to the direction of the fingers; and (ii) electric input means for applying high frequency signals between the zones so as to form sources of surface acoustic waves on the substrate or output means for extracting the signals detected by the device.

Abstract: The device comprises a housing possessing a front face provided with an admission slot for coins and with a coin return receptacle. A conveyor, situated in a shaft communicating by gravity with the return receptacle, transports the coins from the admission slot to a processing module. The conveyor possesses two notched belts interacting with each other to ensure the transportation of the coins with one belt extending below the interacting surfaces of the two belts.

Abstract: A mechano-optical device comprises a support adapted to receive at least one substantially parallel incident beam, of known axis of incidence, and a reflecting dihedron, which is substantially straight and rotatable relative to the support about an axis of rotation which is substantially comprised within its plane of bisection and substantially perpendicular to its edge. The axis of incidence is a generatrix of a first surface of revolution about this axis of rotation, and the reflected beam is a generatrix of a second surface of revolution. When the device is being used as a rotary joint, the dihedron rotates at an angular speed which is half that of the incident ray, which permits the reflected beam to remain stationary on its surface of revolution.

Abstract: A method for assisting terrestrial vehicle traffic involves equipping at least some vehicles with a radar system and a transponder capable of re-transmitting with selected frequency transposition any radar wave received within a predetermined frequency band. The radar system semi-continuously transmits the waves capable of measuring a distance over a range of several hundreds of meter, and the radar system receives the transposed echoes in order to carry out distance measurement thereon. It is also possible to provide certain bodies, not equipped with radar, with individual transponders which are different from those provided on vehicles.

Abstract: A detector of pulses of electromagnetic radiation, especially of laser pulses, comprising as sensor at least one cylindrical body of material translucent to the electromagnetic radiation having a capture window on its surface of revolution. The cylindrical body is provided with an internal metallization delimiting the cylindrical body in two parts subject to selective photodetection, to obtain a sensitivity in bearing and/or in elevation. The body is extended at one end by a non-diffusing transparent part, likewise traversed by the internal metallization. The extension is externally metallized and serves for the link with photodetectors.

Abstract: A flight recorder (MPV) is contained within a two-walled chassis (11, 13), of which the walls are separated by a fire-resistant material (12). The memory means consist of hybrid circuits (H1-H8) of the EEPROM type. These are associated with a control card that may act as a fuse. The hybrid circuits (H1-H8) are mounted so as to be pressure-resistant. The flight parameters are alternating recorded on two memory cards (MC1 and MC2) and also in their hybrid circuits.

Abstract: The device comprises preprocessing circuitry which deliver to a phase locked loop a preprocessed signal obtained from a replica of the incident digital signal staggered in time by a fraction of the cycle of the clock signal of the phase locked loop. This device then allows a fast synchronization of the clock of the phase locked loop in relation to the incident digital signal, in particular at high transmission rates.

Abstract: A card (2) having a memory microcircuit (20) with access thereto under the control of a hard-wired logic circuit or a microprocessor (21) is suitable for cooperating with a terminal (1). A memory in EPROM technology (or in E.sup.2 PROM technology) includes value words (e.g., thirty-two bit words comprising twenty-five value bits, four bits for coding the value unit of each value bit, and a verification bit). By loading a plurality of words into the memory so as to set up a sequence of value units spread over successive powers of 2, the calculation means can split up the amount of any transaction less than the maximum value of the card into binary form very simply, and then consume not more than one bit per value unit (optionally other than the most significant value unit) in respect of each transaction.

Abstract: A card (2) having a memory microcircuit (20) with access thereto under the control of a hard-wired logic circuit or a microprocessor (21) is suitable for cooperating with a terminal (1). A memory in EPROM technology (or in E.sup.2 PROM technology) includes value words (e.g., thirty-two bit words comprising twenty-five value bits, four bits for coding the value of each value bit, and a verification bit). By loading a plurality of words into the meory so as to set up a sequence of value units spread over successive powers of 2, the calculation means can split up the amount of any transaction less than the maximum value of the card into binary form very simply, and then consume not more than one bit per value unit (optionally other than the most significant value unit) in respect of each transaction.

Abstract: A high frequency transformer is made on a magnetic circuit which can be of a generally square shape. The secondary windings are made on printed circuit plates, separated by insulators and traversed perpendicularly by the core or cores of the magnetic circuit. The primary winding can be wound directly on such a core. The transformer is applicable in particular to high frequency very high voltage power supplies, in particular of the type termed "flyback" power supplies.