Abstract: The invention relates to a master-key piston lock comprising a cylindrical rotor pivoting in a bore of a stator, the said stator comprising radial holes opening into the said bore and in each of which there slides a stator piston spring-loaded towards the said bore, the said rotor comprising an axial key passage into which there open radial holes open at their other extremities at the peripheral surface of the rotor, a right circular-cylindrical rotor piston sliding in each of the said radial holes of the rotor and a key equipped with coded notches co-operating each with the inner extremity of one of the said stator pistons in such manner that the outer extremity of each of the rotor pistons is flush with the peripheral surface of the rotor.The rotor pistons comprise a shoulder with which there can co-operate the notches of a master key.

Abstract: The invention relates to a cylindrical lock of the type comprising a barrel journalling in the bore of a body.In the lock to which the invention relates, the peripheral surface of the barrel and the surface of the bore in the body comprise an assembly consisting of an elastic longitudinal tongue and a shoulder which are respectively integral with the said two surfaces and which are arranged in such a manner that the said elastic tongue interacts with the said shoulder to lock the barrel so that it cannot move longitudinally in relation to the body.Application to the car industry.

Abstract: The invention relates to an anti-theft device for a motor vehicle, of the type comprising a bolt restored by a spring to the position for locking an element essential to the motion of the vehicle, a lock comprising a stator and a rotor which is actuated by a coded key and which in the course of its rotation causes the bolt to be drawn back into the unlocked position, in order to prevent the bolt from returning to the locked position as long as the key has not been at least partly extracted from the rotor.According to the invention the safety device consists of a sliding and pivoting lever accommodated in the key channel and interacting with a through-slot provided in the key.

Abstract: The invention relates to a bi-stable (toggle) mechanism for a vehicle anti-theft device comprising a lever 5 pivotally mounted by a shaft 6, the said lever being subject to the action of a spring 10 and movable from one stable position through a center position to a second stable position.In the mechanism according to the invention, the said spring 10 consists of a hairpin type spring of which one end 9 is connected to one end of the said lever 10 and the other end 11 mounted so as to pivot at a fixed point 12. The distance between the ends 9, 11 of the spring 10 when the lever 5 is in either stable position is greater than the distance between the point 12 of location of the spring 10 and the point of engagement of the spring end 9 with the lever end when the lever 5 is at its center position whereby the spring becomes more compressed as the lever approaches the center position where the lever is unstable.

Abstract: The present invention relates to an electrically actuated lock of the type comprising a rotor pivoting in a body and capable of being locked in relation to the said body by locking members constituted by pairs of opposed pistons or by keepers. The locking members are displaced by notches of a key, coded to permit the rotation of the rotor by action upon the key head. In this invention the unlocking of the rotor is effected by electric means without any opening of the rotor to the external environment, thus ensuring perfect sealing and inviolability. The lock comprises a key shank provided with coded notches, the shank being connected in translation with the movable armature of an electro-magnet, the rotor being provided with a graspable head by means of which the user can rotate the rotor when unlocked by the key.

Abstract: A windscreen wiper blade is provided with a universal fastening for attachment to a wiper arm. The wiper blade is provided with a transverse bore in which there is lodged a spindle provided with a central constriction with which there cooperates a locking leaf spring fast with the wiper blade and is capable of being pushed down to free the spindle stub. A rider piece is articulated on the said spindle stub. A leaf spring is fixed by its central part to the rider piece and has two elastic arms disposed longitudinally thereon which thrust towards one wall of the rider piece. The rider piece forms at its two extremities a passage for the introduction of the wiper arm extremity between the said wall and the adjacent arm of the leaf spring. One of the elastic arms is equipped with a locking stud while the wall portion facing the other arm is equipped with a window.

Abstract: The invention relates to security devices with which automobile vehicles are equipped, and more especially to a controlling connection between the anti-theft device locking an element essential to the driving of the vehicle (such as the steering column) and the safety belt the wearing of which is obligatory for the driver in most cases.In order to ensure his safety and respect regulations it is desirable that the driver should not be able to start his vehicle until he has fastened his belt.An anti-theft device according to the present invention comprising a cylinder lock operated by a key, a bolt controlled by said cylinder lock for locking an element essential to the driving of the vehicle, and a device for locking the lock cylinder in rotation, the device being arranged to be unlocked by the fastening of the buckle of the vehicle safety belt.

Abstract: A motor vehicle door lock comprises a ratchet locking mechanism, behind the preferably bolt-shaped catch of which there can engage the flanks of two locking teeth which are arranged one behind the other and which are arranged on a pivotable locking lever which is pressed into the locking position by spring pressure and which, upon a movement of the catch relative to the lever during the locking of the door, can be pivoted by the catch against the spring pressure. For the opening of the lock there engages in the locking lever (9) or is secured thereto, a driving member (28), by means of which the locking lever can be removed from the catch (2) to such an extent that the respective abutting tooth edge becomes disengaged.

Abstract: A device for reading coded notches on keys, the device comprising a magnifier having parallel lines marked on one face, the lines being spaced apart in accordance with the code and each line being indicated by a coding index, the magnifier having a groove for the reception of a key and an abutment to locate the key in a correct position relative to the lines.

Abstract: The invention relates to anti-theft devices for automobile vehicles in which such devices are fixed on the steering column of the vehicle and the aim of the invention is to provide anti-theft steering device which can be adapted to steering column of differing diameters while retaining the necessary security of the fixing. The device comprises a casing containing a locking bolt operated by a security lock and a base to which the casing is secured by means of screws with breakaway heads. The base has a half bore corresponding to the steering column to be equipped with the device and is secured by a flexible member whose first end is selectively fixed by a pin at one of several discrete locations and whose other end is secured to the base in an adjustable manner.

Abstract: The invention relates to an anti-theft device especially but not solely for automobile vehicles which causes blocking of the gear-change lever.The gear-change lever is articulated about an axis substantially parallel with the floor of the vehicle and close to this floor. The floor has attached to it a lock device arranged to imprison the said lever after it has been pivoted down flat.

Abstract: The invention relates to a device for blocking the key passage of a lock. The device can be utilized as a supplemental security, permitting the use of the lock only after a specific condition has been satisfied to produce the retraction or moving aside of the blocking element. The device comprises a movable abutment which can occupy a first position in which it blocks the key passage and a second position in which it clears the passage, the movement from the first position to the second position being controlled by a thermo-deformable element.

Abstract: A Conversion ring is provided for externally flanged mouths of tanks having two distinct locking means, one serving to prevent any axial displacement of the ring in relation to the filler mouth and the other for preventing any rotation of the ring once the latter is placed on the mouth. Both locking means cooperate with the external flange. The conversion ring provides security both as regards the sealing of the tank and as an anti-theft device.

Abstract: A device is provided for controlling the electro-mechanical locking and unlocking member of a vehicle door lock and comprises a transmitter independent of the said vehicle and a receiver mounted inside the vehicle. The transmitter comprises a direct current electric supply source, a coded pulse signal generator drivable by said supply source, and an infra-red radiation emitter connected to said coded signal generator whereby said radiation emitter outputs infra-red pulses in coded form. The receiver comprises detector means for the reception of the infra-red pulses, a memory programed to emit coded pulses identical to said coded pulses from the emitter. A comparator coupled to the outputs of said detector means and said memory, and arranged to emit a signal in the case of agreement between the transmitter and receiver pulses, and an amplifier connected to the output of said comparator.

Abstract: An anti-theft cap for closing a filler pipe of a vehicle fuel tank is provided having a body shaped to locate within the end of the filler pipe and a cover portion having sealing means to engage the end of the filler pipe. A cylinder lock mounted in a bore of said body serves to lock and unlock the cap. A carrier member is connected to said cylinder lock so as to rotate therewith between a locked position and an unlocked position. Two conduits are formed in said body diametrically opposite each other and each have one end at a surface of said body and the other end at another surface which other end communicates with the interior of the filler pipe when the cap is in position thereon.A first valve carried by said carrier member communicates at one end thereof with the atmosphere and at the other end thereof with said one end of its respective conduit when said carrier is in said locked position, whereby vapor from the tank may be vented when the pressure in the tank exceeds a predetermined value.

Abstract: In numerous treatment processes it is necessary to ensure a secure and effective clamping of a movable part against a fixed part.A clamping device for an electrolytic plating bath comprises a circular plate having a plurality of apertures for receiving articles to be plated. The articles are held in position by a clamping device comprising a thermostatic element having a movable clamp subject to a translational movement under the effect of an increase in temperature, the said movable assembly cooperating with the piece to be clamped.By means of the device according to the invention an effective and positive clamping is obtained in a range of desired temperatures which is precisely defined by virtue of the choice of an appropriate thermostatic element.

Abstract: The automobile security lock is of the kind having a body in which is rotatable a cylinder having pistons radially movable therein by a cylindrical key having notches formed therein. The body also has pistons which cooperate with the pistons in the cylinder. The pistons of the cylinder are slidable into radial cylindrical bores formed in the cylinder. Likewise the pistons in the body slide into radial slots in the body. On entry of the correct key the external extremities of the cylinder pistons lie flush with the external surface of the cylinder in such a manner as to permit rotation of the cylinder in relation to the body. However, on entry of an incorrect key where the corresponding notch is either insufficiently deep or too deep the extremities of the cylinder pistons enter said radial slots in said body or the internal extremities of the body pistons said radial bores in the cylinder to effect locking of the cylinder in relation to the body.

Abstract: The invention relates to the electrolytic treatment of metallic parts, and more especially, the obtaining of electrical contact between the parts which have to be treated and an electrode of the electrolytic bath.

Abstract: The steering lock for vehicles, more especially for motor cycles, comprises a lock reception housing which is secured to a tube of the vehicle steering shaft and in which there are arranged in an axially parallel manner a locking bolt to be introduced into the steering shaft and a cylinder lock so as to be axially displaceable and being connected, and comprises a cylinder housing, a cylinder core within the housing, a locking part which projects beyond the cylinder housing and can be introduced, for fixing the cylinder lock in the locking positions, into a recess of the lock reception housing.The locking part is a ring sector which, in the locking position, projects with one area into the recess of the lock reception housing in an interlocking manner and stays with the remaining area in a recess of the locking bolt, which recess receives the ring sector in the displaced position and comprises a surface which is vertical to the locking bolt longitudinal axis.

Abstract: A piston-type safety lock device, of the type comprising a cylindrical rotor journalled in a cavity of a stator. Said rotor contains a plurality of radially slidable pistons cooperating at their inner end with the notches of a key for bringing their other end flush with the periphery of said rotor. Said other end bears against the inner surface of the cavity in which the rotor is journalled and, for one angular position of the rotor, against pistons slidable in the stator and elastically biased toward the rotor. Said pistons of the stator and rotor are flat blanked members. Said pistons are disposed respectively in a single slot of the stator and in a single slot of the rotor and have rectilinear and parallel lateral edges which are in contact with the lateral edge of an adjacent piston or the end of said slot.