Abstract: An apparatus for controlling the rotation of a gear comprising rotating a cam which causes the linear movement of a rod to control the rotation of the gear, wherein the cam rotates within a confined space but not around a fixed axle. The apparatus is particularly useful for controlling the opening and closing movements of a handcuff whose operating elements are comprised of a swing arm and at least one gear having teeth which engage the teeth of the swing arm.

Abstract: A solenoid operated mechanical mechanism for controlling the rotation of a gear comprising the use of a first linear element which moves in response to an electrical current to cause the rotation of a cam which, in turn, causes the movement of a second linear element which controls the rotation of a gear. The solenoid operated mechanical mechanism is particularly useful for controlling the opening and closing movements of a handcuff whose operating elements are comprised of a swing arm and at least one gear having teeth which engage the teeth of the swing arm.

Abstract: A set of handcuffs having an improved locking mechanism. The critical element of the locking mechanism is the utilization of a locking gear set that replaces the conventional pawl. The teeth in the locking arm are matched to the locking gear set and are always in constant and full contact with the locking gear set. This invention also uses a cam/cylinder locking device that controls the movement of the locking gear set. In the normal cam position the locking gear set will only turn in one direction, thus enabling the locking arm to close. In the second cam position the locking gear set will not turn in either direction. The cam can be rotated, through the use of a cylindrical key, in either directions. Rotation in one direction will select one of two locking positions. Rotation of the cylindrical key in the opposite direction will free locking gear set to rotate in the opposite direction thus disengaging the locking arm.

Abstract: A set of handcuffs having an improved locking mechanism. The critical element of the locking mechanism is the utilization of a locking gear set that replaces the conventional pawl. The teeth in the locking arm are matched to the locking gear set and are always in constant and full contact with the locking gear set. This invention also uses a cam/cylinder locking device that controls the movement of the locking gear set. In the normal cam position the locking gear set will only turn in one direction, thus enabling the locking arm to close. In the second cam position the locking gear set will not turn in either direction. The cam can be rotated, through the use of a cylindrical key, in either directions. Rotation in one direction will select one of two locking positions. Rotation of the cylindrical key in the opposite direction will free locking gear set to rotate in the opposite direction thus disengaging the locking arm.