Abstract: An anti-theft device includes two groups of elements, each group being composed of a plurality of elements flexibly joined to each other by offset cylindrical joints; both of the groups are flexibly joined at one end to a central link, and are fitted with a disengageable fastener at the opposite end; when used, the opposite ends of the device are fastened to each other to form a closed loop round an object that is to be secured against theft; the fastener is designed to keep the device locked in its closed loop configuration so as to prevent unauthorized breaking of the loop; when not used, the device can be folded up into a neat, compact configuration in which the two groups of elements are folded up and arranged side by side.

Abstract: A mechanical anti-theft device for motor vehicles which includes, essentially, gripper means capable of engaging the cross section of a tire and a wheel rim of a wheel of the motor vehicle so that it closes on a pivot around the tire and the wheel rim; a support bar for the gripper means; an actuator rod, connected to the gripper means, which slides with relation to the bar in such a way that it can be moved, manually, between a first, unlocked, position, when it controls the opening of the gripper means and a second, locked, position, when it controls the closure of the gripper means around the tire and wheel rim; elastic means are also envisaged, placed between the bar and the rod, capable of holding the rod in the unlocked position, and also items, associated with the rod and capable of engaging with the bar in order to lock the rod with respect to the bar in the closed position.