Abstract: An anti-theft steering lock includes a locking sleeve fixed to a steering shaft and having substantially radial teeth. Pivoted levers each having a pointed tip are freely pivoted on axes extending parallel to the steering shaft and fixed to a fixed support in which cradle portions are formed. The levers are nested in these cradle portions. Second ends of the levers, opposed to the pointed tip ends, cooperate with a window formed in a control bracket which has a narrow zone and a wide zone. The angular spacing between the pointed tips of the levers is slightly smaller than the angular spacing (a) between two successive teeth of the locking sleeve, or a whole number multiple of this angular spacing.

Abstract: An evolutive coding process using a pseudo-random discontinuous function for coding remote controls, such as for automobiles. A message containing at least two pseudo-random values calculated by the pseudo-random discontinuous function is transmitted. Preferably the pseudo-random values are successive values of the pseudo-random discontinuous function, and the message optionally includes a code derived as a function of a specific base code associated with the system. The general preferred form of complete code message may take the form T(C) plus FA(C,n-1), plus FA(C,n) where T is a continuous function and FA is a pseudo-random discontinuous function.

Abstract: A lock of the disconnectable rotor type comprises a rotor rotatable in a stator sleeve rotatable in a fixed lock case. Locking means (e.g. pairs of pins or pallets) cooperate with rotor and stator sleeve to couple them together for simultaneous rotation in the absence of a correct key while freeing the rotor from the stator sleeve when the correct key is introduced. The stator sleeve is maintained in a normal or "rest" position by an effaceable indexing member. The indexing member cooperates with the lock case to maintain the stator sleeve in its said position. A lock bolt actuating lever is coupled to the rotor by coupling means such as to effect this coupling only after rotation of the rotor independently of the stator sleeve. The coupling means include a slide ring rotatable with the rotor, cooperating with the stator sleeve through camming means to slide the slide ring axially, and including at least one actuating finger.

Abstract: An anti-theft device for motor vehicles which operates by cutting off the electrical supply to the ignition by a relay supplied by a central electronic unit which is connected in series with the "on" contact of the anti-theft steering lock of the vehicle characterized in that the relay is connected to the central unit through at least one transistor and to ground by a switch device which is maintained open while the engine is running.

Abstract: An infrared transmitter of coded message is provided having a fixed code and large number of combinations particularly but not solely for use in the automobile industry.The transmitter comprises a series programmable electronic memory (1), the content of which is addressed by a pulse transmitter (2), an oscillator or timer, the content of the memory (1) being supplied to a pulse generator (3) supplying an amplifier (4), the output of which is transmitted to a transmitter diode (5), the content of the memory (1) being supplied, in addition, to an end of message blocking device (6) controlling the reading pulse transmitter (2).

Abstract: This invention relates to a reflector for an automobile headlight comprising a reflecting quadric having substantially the surface of a paraboloid of revolution intersected by upper and lower truncation planes, an electric lamp filament being situated substantially at the focus of said quadric to provide full beam lighting by reflection on said quadric of the luminous beams emitted by said filament and traversed by an optical glass situated in front of said quadric. The reflector according to this invention is characterized by the fact that at least the lower truncation plane of the reflector is equipped, on its internal surface illuminated by the full beam filament of the electric lamp, with a plurality of reflecting spherical elements spaced in a concentric arrangement comparable with Fresnel echelons with respect to their common axis passing through the focus of the useful reflecting conic of the reflector, this focus being also their common center.

Abstract: A steering lock is disclosed for blocking the rotary movement of a motor-vehicle steering shaft, with at least two locking bolts which are movable close to or at a short distance from one another and next to one another in guides and which, in a position blocking the steering shaft, reach into a recess in the steering shaft by means of a front end face and are movable away from the steering shaft into a non-blocking position in their longitudinal extension. The particular guide (17) is so wide that the locking bolt (13, 14) is tiltable in this. A side wall (19) of the locking-bolt guide (17) has a projection (21) or set-off portion, against which the locking bolt (13, 14) rests by means of a projection or an edge (22) in the blocking and tilted position, in order to secure the blocking position.

Abstract: A combination lock mounting and panel assembly, said panel having a circular orifice extended by a plurality substantially rectangular cut-away portions disposed crosswise, comprises(a) an external ring to be pressed upon the external face of the wall having a cylindrical wall passing through the said circular orifice,(b) radial lugs fast with the said ring and lodged in the said cut-away portions,(c) further radial lugs carried by the extremity of the said cylindrical wall, said further lugs being offset axially in relation to the first lugs,(d) a stop-forming axial wall for connecting at least one of said further lugs to at least one of the first lugs,(e) peripheral dogs at the extremity of the body at its extremity adjacent the wall, said pheripheral dogs serving to lodge each between a first and a second lug of the ring in the course of a translation movement followed by a rotation of the said body on the ring, certain at least of the lugs being in pawl-engagement-type co-operation with at least certain o

Abstract: The invention relates to an anti-theft steering lock for automobile vehicle, of the type comprising a bolt thrust elastically into the locking position and controlled by the rotation of a key rotor, and means for retaining the bolt in the retracted position which are set out of action by the withdrawal of the key.

Abstract: An automobile headlamp reflector is produced by successive injections of a plastics material comprising a first, internal layer of polyamide forming a skin, a second layer of a charged polyamide with 50.+-.5% mineral and/or organic filler forming a supporting structure, and a third, external layer of polyamide, said first and third layer forming skin surrounding said supporting structure.The ratio EPI/ES in the optical zone of the reflector is such that the surface does not display a local variation greater than 0.002/mm; EPI and ES being respectively the thicknesses of the first, internal layer and the supporting structure.