Abstract: The locking cap for fuel tanks is provided with electro-mechanical locking means whereby the cap can be unlocked by remote control. The cap comprises a body member having a lid pivotable thereon. A spring-urged pivotable locking device on said body engages a spindle attached to the underside of the lid to hold the latter in a locked position. A spring-urged locking slider engageable with a stop formed on said locking device is controlled by a pair of pivoted armatures which are articulated to said slider.On energization of a U-shaped electromagnet attracting the armatures the latter effect disengagement of the slider from the locking device which releases the spindle thus unlocking the lid.

Abstract: The device serves to lock the locking bolt of a cylinder lock in its locking position when an unauthorized removal of the locking cylinder is effected. A lever mounted with the housing of the cylinder lock rests against a portion of the locking cylinder which effects swivelling of the lever upon the removal of the locking cylinder. The locking bolt is lockable by a locking piece which is spring-loaded in the direction of the locking position and is held in the unlocking position by the lever in the non-swivelled state thereof. The locking piece is released when the lever has been swivelled by the locking cylinder.

Abstract: For milling a control groove in a vehicle safety key there is used a motor-driven milling head connected by a linkage such as a pantograph to a tracer member. The tracer member follows a template groove. Since it is desired to vary the shape of the groove the template groove of the present invention is formed in sections on a plurality of strips some or all of the strips carrying several groove sections, said strips being shiftable in relation to each other so as to join up selected sections of the strips to form a single groove.

Abstract: A safety device for a diesel engined vehicle comprises a key operated lock controlling starting and stopping of the engine and a steering wheel lock mechanism. The device is such that prevents the steering wheel from being locked while the engine is running.

Abstract: The adjustable locking device, particularly suitable for securing a motor-cyclists's helmet to his machine when not in use, comprises a housing having fixed and movable portions to form a clamp between which portions the rim of a helmet may be gripped. A toothed element mounted in the housing serves to locate the movable position and a further toothed element may be brought into engagement with the former by rotation of a key operated lock.

Abstract: An anti-theft device having a pivoted lever, a cable connected to one end of the lever and controlling a fuel injection pump, the other end of the lever engaging a cam integral with the cylinder of a lock so that when the cylinder is turned by a key in the lock the cable controls the opening and closing of the fuel injection pump.

Abstract: The anti-theft plug or cap for the filler of a gasoline tank comprises a plate with a tapping corresponding to threading on the filler, a body rotatable in respect of the said plate, a securing element serving to render the said body integral with the said plate, and a cylindrical lock mounted in the said body and controlling the said securing element. The securing element rotatable with the rotatable body and serving to render the body fixed in relation to said plate, is provided with an elastically deformable arm resiliently removable from the axis of the plug under the action of the said lock, while its free end, when the arm has undergone no deformation, is disengaged from said teeth, although it engages them when the arm has undergone deformation.

Abstract: A key of which the longitudinally extending grooves which code the key for insertion into the key receiving passage of a lock, extend both through the stem of the key which is inserted into the passage, and through the manipulating head part of the key so that the key blank can be produced by a stamping or pressing operation. There is also described a method of making the key.

Abstract: An anti-theft device for a motorcycle helmet. Said helmet has a continuous rib on the periphery of the edge of its opening. There is pprovided means for gripping said edge of the opening of the helmet behind said rib, and a lock device for locking said gripping means in the gripping position.

Abstract: A cylinder lock which has a cylindrical barrel provided with radially slidable plates elastically biased to project from said barrel into at least one groove in the body of the lock. Said plates project slightly from the barrel in the position to which said plates are returned inside the barrel by the key of the lock, whereby picking of the lock is made more difficult.

Abstract: An anti-theft cap for a screwthreaded base. Said cap comprises a plate provided with a tapped aperture complementary to the screwthread of the base, a body journalled on said plate and in which body a lock is mounted. Said lock comprises a catch which, for one position of the lock, is at a distance from the axis of the cap equal to that of a stop integral with said plate, and, for at least one other position of the lock, is at a different distance. Said stop is elastically movable and adapted to move under the action of the catch when the screwing torque transmitted by said catch exceeds a given value.

Abstract: A cylinder lock, particularly useful as a vehicle steering lock, of which the barrel is axially slidable between an outer, locked position and an inner position in which the barrel can be rotated by an appropriately coded key. Insertion of a key into the key passage of the barrel when the barrel is in the outer position is prevented by closure elements which are displaced by the leading end of the key, axial movement of the barrel from the outer to the inner position occurring during such displacement.

Abstract: A safety device for a rotary starter switch for an automobile vehicle, of the type comprising a non-rotatable part and a part which is rotatable with respect to the non-rotatable part about an axis of revolution. The safety device comprises elastically yieldable means connected to one of the two parts and a profile integral with the other part and constraining said elastically yieldable means to travel through two different paths depending on the direction of rotation, one of which paths has an anti-return abutment. Said elastically yieldable means comprise a spring blade so disposed as to be cooperative by its edge with said anti-return abutment.

Abstract: A cap for a fuel tank of the type comprising a labyrinth path between the fixed elements and the moving elements of the cap. Said labyrinth path is formed by concentric ribs defining grooves which intercommunicate by way of interruptions forming baffles, and a sealing element disposed on said ribs. Said sealing element has at least one projection which is adapted, in one angular position of the sealing element with respect to the labyrinth path, to close said path and, in another angular position, not to close said path.

Abstract: An anti-theft safety device for an automobile vehicle comprising a lock having a rotatable barrel cooperating with a key which has a cylindrical body and is provided with a driver of non-circular cross-sectional shape which cooperates with a cavity of complementary shape formed in the barrel. Said barrel actuates, in the course of its rotation, means for locking at least one device essential for the operation of the vehicle and means for closing electric circuits. A rotatable electric switch is provided therein which is driven by cooperation of an opening of the switch with a driver, of complementary profile, on the key, the last-mentioned driver having sufficient length to continue to cooperate with said opening when the key has been partially extracted from the barrel and the driver for the barrel no longer drives the barrel.

Abstract: A lock having a key-actuated rotary barrel. Said key comprises a holding head axially slidably mounted on a body which head has a radial abutment. The lock has a key entrance surface spaced from the key entrance of the barrel and said surface has a key inserting opening having at least one radial abutment cooperable with said radial abutment of the key head for an axial position of the key head with respect to the key body.

Abstract: A cylinder safety lock the rotor of which carries a plurality of longitudinally extending parallel resiliently flexible elongated longitudinal elements arranged in circumferentially spaced relationship about and at the same radial distance from the longitudinal center line axis of the lock and engageable in the absence of a key with corresponding grooves of an inner coaxially positioned core portion of the stator of the lock to hold said rotor against rotation; said elongated elements being engageable with an inserted key for being deflected radially outwards either into an annular space left between said stator and core for unlocking said rotor when the key is correct or beyond said intermediate space into corresponding grooves of said stator to still lock said rotor when the inserted key is wrong.

Abstract: A compact anti-theft device for a motor vehicle comprises a cylindrical lock, a rotary electrical switch and a bolt, a driving connection is made between the lock and the switch which includes gears and the axes about which the switch and lock rotate are parallel and offset or are disposed at angles to each other.

Abstract: A switch is disclosed which comprises a rockable switch actuating element having contacts and a fixed switch terminal means. The rockable element is moved by operation of a lock of which the rotor has an eccentric extension disposed within and cooperating with an opening in said rockable actuating member so that upon insertion of the key into the rotor and turning of that rotor, the actuating element is moved to effect switching.