In a handcuff device of the double locking type having a latch with inclined teeth which allows the locking arm of the cuff to rotate about and enclose the wrist and hold the locking arm in place around the wrist and having a bolt behind the latch that is slideable under the action of an externally actuated drift pin over the latch to a locking position that locks the latch against the locking arm preventing movement of the locking arm in either direction. The unintentional movement of the bolt into its locking position is prevented by providing a restraining means--a spring loaded pin--that operates against the casing and the bolt to resiliently urge the bolt against the latch and against the spreading action of mating shoulders on the bolt and latch that cause the two to spread apart against the action of the restraining means as the bolt moves forward towards the locking position and the shoulders engage. The resistance offered by the restraining means against the spreading action of the shoulders is sufficient to overcome any internal movement of the bolt if the cuff is struck or jarred. The latch also preferably has an inclined face against which the drift pin acts to ease the effort required to spread the bolt from the latch and move it into the locking position.

A pair of wrist shackles or handcuffs in which one handcuff is joined to a second handcuff by a single pivot member that permits one handcuff to pivot or rotate in a planar direction to overlay the other handcuff.

A handcuff for dual use as a quick-release training device and an actual restraint device, which has a bail and an arcuate ratchet member with teeth. The handcuff includes a locking assembly, disposed within a bail, that has a pawl having a first end pivotally coupled to the bail and a second end with teeth pivotal between a secured position in which the teeth of the pawl engage the teeth of the ratchet member and an unsecured position in which the second end of the pawl is separated from the ratchet member. The second end of the pawl further has a vertical shoulder for engagement with the flange of a key inserted within the locking assembly for manipulating the pawl between the secured and unsecured positions upon rotation of the key. A stop member is disposed above the pawl and movable in and out of contact with the pawl upon engagement with the key to prevent the pawl from being placed in the unsecured position when the stop member is in contact with the pawl. A quick-release feature is provided for placing the pawl in the unsecured position when the stop member is not in contact with the pawl.

A double locking handcuff includes an interior spring laterally moveable between single- and double-lock positions. A finger-operated, pivoting cam is disposed within a slot extending through the cuff frame, and has a wide upper end accessible from the top of the cuff and a narrow, leg-like lower end positioned for movement against the spring. For double locking the handcuff, the cam upper end is moved downwards by hand. This causes the cam leg to press against and laterally shift the spring to its double-lock position. Because the cam is movable by hand and without the need for the handcuff key or for finding a double lock slot or pinhole, the double lock mechanism can be easily and quickly actuated. Also, when the handcuff is double locked the cam can be freely pivoted back and forth, providing direct tactile feedback that the handcuff is double locked.

A triple-lock handcuff of the type having a blade pivotally joined to spaced-apart cheek plates for movement through a locking channel includes several improvements. The lock assembly includes first and second pawl members resiliently urged toward the channel independently of one another by separate springs. A key operated extractor block carries a yoke for moving both pawl members simultaneously away from the channel to open the handcuff. The first and second pawl members are spaced-apart within the locking channel. An elongate resilient cushion is arranged along the inner edge of the blade so as to assume a first unloaded profile capable of passing between the cheek plates and, alternately, a second profile when bearing upon a limb, incapable of passing between the cheek plates. A sleeve detachably fastens the cushion to the blade's inner edge while leaving the blade's outer edge free of overlay. When the cushion is loaded, the sleeve locks the cushion on the edge of the blade by urging a pair of opposed feet into grooves formed in the side of the blade.