Abstract: A double-locking mechanism for handcuffs, which include a pawl-and-ratchet mechanism wherein the ratchet pawl is spring biased to couple with a pivotal ratchet jaw arm within in a shackle casing and a bolt is provided for engaging the pawl to prevent the coupled jaw from pivoting in either direction in order to double lock the mechanism. A pivot slide mechanism is provided whereby either the pawl or the bolt is not only permitted to pivot about an axis within the casing, but is also permitted to have limited displacement in a direction transverse to its pivot axis which thereby causes the pawl to engage a stop within the casing to double lock the pawl from pivoting in either direction and also causes the bolt under bias to displace from a first bolt position to a second bolt position and thereby engage and retain the pawl in the double lock position against the stop in order to ensure that the mechanism will remain double locked until opened with a key.

Abstract: A handcuff restraint strap is disclosed herein. The strap is made of a substantially soft, flexible, and strong material, such that it is comfortable to hold, and will withstand the forces applied while an officer holds and controls a suspect. The strap mounts to the center chain on the handcuffs and provides a handle for an officer to easily manage a handcuffed individual.

Abstract: The present lock construction, for securing a movable object to a fixed object, includes a housing having an interior cavity and an elongated member having a first portion secured within the housing and a second portion slidably received within the housing. The elongated member is slidable within the passageway to a locked position, securing the movable object to the fixed position and to an unlocked position, releasing the object from the fixed object. First and second members are slidably disposed in the housing and are movable to engage the cable in the locked position. A rotatable locking mechanism is disposed within said housing and is engageable with the first member to permit slidable movement of the first member and thereby allow slidable movement of the elongated member to different locked positions. The rotatable locking mechanism is also engageable with the second member to permit slidable movement of the second member and thereby prevent movement of said elongated member in the locked position.

Abstract: A restraint locking mechanism provides a spring for biasing the bolt toward the jaw, and for resisting movement of the stop when the stop is in the double lock position. The resistance provided by the spring to movement of the stop increases to a maximum level of resistance as the stop is moved toward the single lock position, and then decreases, as contrasted with providing maximum resistance at the beginning of the stop's movement, and no resistance thereafter. Such a locking mechanism is more difficult to pick, and is less likely to be moved from its double lock position to its single lock position, by a blow to the locking mechanism.

Abstract: A clamp, clamping means incorporating the clamp, and a method of clamping are disclosed. The clamp includes means for clamping a securing tie therein, together with means for attachment to a surface, and, in combination with a securing tie, provides a clamping means suitable for clamping objects to a fixed point.

Abstract: A cuff device comprising an elongated body, a flexible cable within the body, a loop extraction system for extracting a loop of the cable from an end of the elongated body large enough to fit over an extremity of a suspect, and a loop retraction system for retracting the loop to fit snugly over the extremity. A second cable is preferred, with one cable deployed from each end of the elongated body, preferably a PR-24 form factor baton.

Abstract: Folding handcuffs include a lockable hinge which permits folding the assembly for compact storage but automatically locks into a rigid assembly when fully unfolded. The hinge operates by the movement of a locking bar into locking groove(s) via a tensioning mechanism when the hinge components are aligned in the unfolded, extended configuration. The lockable hinges can also be used to connect the components of a variety of common tools including shovels, saws and the like.

Abstract: A handcuff adapted to guide an inserted foreign metal piece upwardly to a blocking portion, and to be quickly put on a wrist of a criminal person is disclosed. The handcuff includes: a movable arm having a ratchet portion formed with teeth; a pair of fixed arms pivotably connected to the movable arm by a pivot pin and integrally provided with rectangular base bodies; a partition plate disposed between the pair of base bodies of the fixed arms, and provided with bilaterally bent protrusions; a pair of frame plates disposed between the fixed arms and the partition plate, and provided with upwardly inclined surfaces and blocking protrusions; a pair of pawl pieces biasedly supported in the pair of frame plates, and provided with teeth to be engaged with the teeth of the movable arm; and a leaf spring received in the pair of frame plates to bias the pair of pawl pieces toward the movable arm. The most proximal teeth of the teeth include slanting surfaces.

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 flexible tie comprises a flexible strap having a head portion and an opposing end portion. The head portion of the strap includes first and second slots. A dual-loop restraining device is formed using two straps by inserting the end portion of each strap through the first and second slots in the other strap. In use, the loops are tightened around a prisoner's arms or legs to restrain the prisoner's movement.

Abstract: A cable tie for bundling together a plurality of elongated objects, the cable tie including an elongated flexible strap having opposing ends, a locking head defining a pair of strap passageways, each of the passageways having an inlet end and an outlet end, and a pair of locking devices, each of the pair being mounted to the locking head and at least partially within one of the passageways, the locking devices being configured and oriented relative to the respective passageways so as to permit the ends of the strap to be inserted into the inlet ends of the passageways, and threaded through the passageways, such that the ends emerge from the outlet ends of the passageways, the locking devices being unidirectional so as to prevent the strap ends from being pulled back through the respective passageways in a direction moving from the outlet ends back toward the inlet ends.

Abstract: Folding handcuffs include a lockable hinge which permits folding the assembly for compact storage but automatically locks into a rigid assembly when fully unfolded. The hinge operates by the movement of a locking bar into locking groove(s) via a tensioning mechanism when the hinge components are aligned in the unfolded, extended configuration. The lockable hinges can also be used to connect the components of a variety of common tools including shovels, saws and the like.

Abstract: A handcuff adapted to guide an inserted foreign metal piece upwardly to a blocking portion, and to be quickly put on a wrist of a criminal person is disclosed. The handcuff includes: a movable arm having a ratchet portion formed with teeth; a pair of fixed arms pivotably connected to the movable arm by a pivot pin and integrally provided with rectangular base bodies; a partition plate disposed between the pair of base bodies of the fixed arms, and provided with bilaterally bent protrusions; a pair of frame plates disposed between the fixed arms and the partition plate, and provided with upwardly inclined surfaces and blocking protrusions; a pair of pawl pieces biasedly supported in the pair of frame plates, and provided with teeth to be engaged with the teeth of the movable arm; and a leaf spring received in the pair of frame plates to bias the pair of pawl pieces toward the movable arm. The most proximal teeth of the teeth include slanting surfaces.

Abstract: A cuff device comprising an elongated body, a flexible cable within the body, a loop extraction system for extracting a loop of the cable from an end of the elongated body large enough to fit over an extremity of a suspect, and a loop retraction system for retracting the loop to fit snugly over the extremity. A second cable is preferred, with one cable deployed from each end of the elongated body, preferably a PR-24 form factor baton.

Abstract: A key operated restraining device is provided to create a securing loop of adjustable dimension. The device includes a locking head portion, an elongated smooth surfaced strap insertable into the locking head portion to form a securing loop of adjustable dimension, a support block disposed in the interior of the head portion, and a pawl member. Both the support block and the pawl member terminate in a spaced relation to an interior wall surface of the head portion and form a slideway for the strap operation. The pawl member is connected to the locking head by a resilient hinge structure with a spike inserted into or attached to the pawl biasing the pawl member into a locking position wherein the locking structure is operative to lockably engage a smooth strap and a release position wherein the locking structure is disengaged from the strap.

Abstract: The invention provides a pair of cuff locks joined by a universal joint and linkage system which provides for 360 relative rotation between the cuffs as well as allow the cuffs to be folded together into a compact position. The invention further provides for a push button cylinder lock which includes a rotatable plug and a fixed plug each having a plurality of aligned bores for receiving one or more tumbler pins. The push button cylinder lock further includes a non-rotatable push button shaft which is sildably mounted within the housing. One or more retaining pins engage locking indents of the push button shaft.

Abstract: A handcuff and leg cuff removal tool has two grabbing mechanisms attached to the ends of a pair of levers. The grabbing mechanisms comprise pairs of cams which engage the ratchet arm and body of a hand/leg cuff. The levers are class one levers and have a common pivot pin. Force is applied via the levers to move the grabbing mechanisms away from each other. The cams grip the handcuff as force is applied. Force is applied via the levers sufficient to cause the ratchet arm to pull away from the locking mechanism in the body of the restraint. A leverage ratio of 10:1 provides sufficient leverage to permit a person to manually operate the tool.

Abstract: A rescue clamp rescues precariously located victims, such as swimmers in water, such as seas, rivers, streams, ponds or swimming pools, climbers in deep ravines, persons on top of a burning building or persons fallen down a well. The rescue clamp includes an orifice clamp into which a victim inserts the hand and forearm. A trigger is activated by being in spring loaded physical contact with a user's forearm or is activated when a trigger handle is grabbed by the victim's hand, to cause the clamp to snugly engage and grip around the victim's wrist or forearm. The rescue clamp grips the wrist or forearm by off-centered hour glass shaped jaws that rotate in unison to reduce the size of the orifice therebetween.

Abstract: A restraining device for use in securing a prisoner having an upper control strap gripped through a releasable cam buckle and secured to a pair of handcuffs worn by an individual behind his back, the loose end acting as a hand grip. The cam buckle is attached to leg shackles worn on the ankles of the prisoner be means of a lower strap loop of fixed length The length of the upper control strap between the handcuffs and the cam buckle can be adjusted by pulling the control strap through the cam buckle, thus tightening the restraining device relative to the prisoner's wrists and ankles. The overall length can be increased by opening the cam buckle and sliding the buckle along the control strap as desired. A strap lock is located on the loose end of the control strap to be slid to a position against the cam buckle to assure a secure closure thereof.

Abstract: A device to be attached to a handcuff or leg iron that disables the existing key that is used to lock and unlock the handcuff or leg iron and replaces it with a locking mechanism that utilizes a non-universal key. The locking mechanism is preferably parallel to the pivot access of the handcuff locking arm and its keyway is spaced above the cheek plates of the body of the handcuff or leg iron and therefore is more difficult to access by the prisoner. The locking mechanism is set by insertion of a key into the same keyway, in a ready to lock position in which the handcuff or leg iron can be tightened but not loosened, or in a triple locked position in which the handcuff or leg iron cannot be tightened or loosened. This triple lock is in addition to the double lock position that is typically offered by the original handcuff or leg iron.

Abstract: A handcuff restraint strap is disclosed herein. The strap is made of a substantially soft, flexible, and strong material, such that it is comfortable to hold, and will withstand the forces applied while an officer holds and controls a suspect. The strap mounts to the center chain on the handcuffs and provides a handle for an officer to easily manage a handcuffed individual.

Abstract: A wrist restraint apparatus includes two straps threaded through an outer sleeve. By grasping the outer sleeve at a thumb-rest with one hand, a user can use his other hand to pull the outer sleeve to the rear, thus tightening the straps around the wrists of a restrained person. The length of the straps can then be secured by rotating the outer sleeve until the locking pin engages the appropriate notch in the locking channel port. To loosen or remove the straps, the outer sleeve is pulled slightly to the rear and rotated so that the locking pin disengages from the locking channel port. Once the device is applied, additional restraints, such as standard handcuffs or ankle cuffs, can be used if necessary to meet custody and control level escort requirements. The device acts as a handle to provide control over the inmate from the rear.

Abstract: A handcuff includes cheek and jaw members pivotally secured and movable between open and closed positions. Teeth are formed on the jaw member, and a locking mechanism is carried by the cheek member. The locking mechanism includes one or more primary gears having a plurality of teeth that engage the teeth of the jaw member in the closed position and rotate as the cheek and jaw members pivot. A secondary gear may be secured to and rotatable with the primary gear. A latch may pivot to releasably engage the secondary gear, to prevent the secondary and primary gears from rotating, and to prevent the cheek and jaw members from moving to the open position. The locking mechanism may include a pair of spaced-apart primary gears with the latch disposed therebetween. The jaw member and gear may be disposed in a planar layer, and the latch may be disposed outside the planar layer defined by the jaw member and gear.

Abstract: An anti-abduction device for preventing or discouraging the unlawful abduction of a child or person. The anti-abduction device comprises a pair of bracelets with each bracelet being adapted to fit around the arm of a person. More particularly, the bracelets include an interconnecting structure that enables the bracelets to be interconnected. In use the bracelets are disposed about the arms of a child or person. In an abduction threat the child or person places his or her arms around an object. Because the bracelets assume an interconnected mode after the arms have been extended around the object, it follows that the child or person is effectively tied to the object and this will serve to frustrate the abduction attempt.

Abstract: A training restraint having double loops formed of two separate, flexible straps joined together by an interlocking cover is extremely strong, tamper resistant and more easily molded than single strap devices. The restraint is designed to be folded into a compact storage position which can be easily carried by law enforcement personnel yet is instantly ready for use. The restraint is designed for repeated use and is provided with indicia to identify the device for training purposes.

Abstract: Keyless restraints similar to handcuffs and leg shackles, which restraints employ conventional ratchet action bundling ties. The restraints include a securing block which has two receptacle each capable of receiving the pawl block of one bundling tie. After the pawl block of each bundling tie is placed in its respective receptacle, the toothed strap of each bundling tie is inserted through aligned slots formed in opposing sides of its associated receptacle. The toothed strap engages the pawl block by conventional ratchet action. The bundling ties are then entrapped within the securing block, and can be drawn around the wrists of a detainee or any other object being secured. Each receptacle has a projection which releasably retains the pawl block of the bundling tie in place within the receptacle. Optionally, the receptacles are connected by a flexible tether long enough to permit a detainee to walk, but too short to permit running.

Abstract: A training handcuff key for use during training of security officers in the use of handcuffs used to restrain a subject. The training key includes a magnet washer that holds the key adjacent the surface of the handcuff keyhole, even during violent jerking and/or dropping of the handcuffs during simulated apprehension situations. The training key operates in all respects as does a standard handcuff key, but includes the feature of remaining adjacent the handcuff keyhole, while having a profile which does not interfere with the training use of the handcuffs. The training key is removable after completion of the training exercises, permitting the handcuffs to be used in a standard manner. Use of the training handcuff key dramatically reduces the time required to remove the handcuffs after they have been applied to the subject, therefore allowing the trainer and the trainees more time to develop proper and efficient methods of handcuffing and dramatically improve their skills in proper handcuffing techniques.

Abstract: A handcuff key having a shank on which is mounted a paddle offset from the end of the shank so that a portion of the shank protrudes beyond the end of the paddle. The key has a first asymmetrical gripping surface as well as a second cylindrical gripping surface. The gripping surfaces are formed of an elastomer while the offset paddle and shank are formed of metal. The key is also provided with a quick release cap which snaps over a double-lock stem extending from the key. In an alternative embodiment, the quick-release cap is provided with an offset key ring to permit the key to hang substantially vertical from an officer's uniform or key ring during storage.

Abstract: A training restraint having double loops formed of two separate, flexible straps joined together by an interlocking cover is extremely strong, tamper resistant and more easily molded than single strap devices. The restraint is designed to be folded into a compact storage position which can be easily carried by law enforcement personnel yet is instantly ready for use. The restraint is designed for repeated use and is provided with indicia to identify the device for training purposes.

Abstract: A pair of restraints, preferably in the form of handcuffs, are separately connected to a housing assembly by way of elongated cables. The cables are attached at their other ends to a rotatable spool sturdily housed within a box ratchet assembly. Each restraint is first separately applied to a resisting arrestee's wrists. The cables are then reeled into the spool member with a ratcheting motion, enabling a law enforcement official to maintain a controlled joinder of the handcuffs and the arrestee's wrists.

Abstract: A prisoner restraint device is provided having a belt with a tongue attached to a handcuff cover with two plates with inner and outer faces, lateral edges, longitudinal edges and slots. A channel to receive a portion of a pair of handcuffs extends across each of the inner faces of the plates from one lateral edge to the other lateral edge. The plates may be secured together with locking mechanisms and/or by using a sleeve containing slots corresponding to the slots of the plates and inserting a tongue through the slots. One end of the tongue is attached to a belt, further restricting the prisoner's ability to move his hands relative to his body.

Abstract: An anti-abduction device for preventing or discouraging the unlawful abduction of a child or person. The anti-abduction device comprises a pair of bracelets with each bracelet being adapted to fit around the arm of a person. More particularly, the bracelets include an interconnecting structure that enables the bracelets to be interconnected. In use the bracelets are disposed about the arms of a child or person. In an abduction threat the child or person places his or her arms around an object. Because the bracelets assume an interconnected mode after the arms have been extended around the object, it follows that the child or person is effectively tied to the object and this will serve to frustrate the abduction attempt.

Abstract: A device for concealing, storing and permitting ready access to and use of a handcuff key which is not readily identifiable as a key holder but is easily retrieved and utilized by law enforcement personnel. The handcuff key is camouflaged and concealed in a variety of devices, such as a ball point pen enclosure, a pocket knife holder and a rectangular case.

Abstract: A portable restraint and confinement device for confining an animal within a fixed boundary. The device includes a base panel which has an outer perimeter defining a fixed boundary. A securement strap is attached at one end to the center of the base panel and at the other end to an attachment device. The attachment device is configured for connecting to a harness, collar or other holding device secured to the animal wherein the animal is confined within the fixed boundary by the securement strap. Alternate configurations of base panel are disclosed for improving portability as well as for use in specific environments and locations. An embodiment is disclosed for use in restraining and confining humans to within a fixed boundary.

Abstract: The method and device of this invention immobilizes a person in a secure, upright asphyxia-preventing restraining system which includes a leg wrap and shoulder harness, both of which are transparent to x-rays and have the flexibility to safely limit flexing of the legs while immobilizing the upper torso in an erect position without causing damage to the body. It can be easily and safely applied by public safety officers including police or other law enforcement personnel and medical personnel to secure a person against undesired movement while maintaining them in an upright, sitting position which leaves the diaphragm free for natural, unrestrained breathing movement. The asphyxia-preventing restraining device comprises an elongate leg wrap member sized and shaped in the form of a trapezoid to wrap and restrain movement and bending at the knees of the legs of the person to be restrained without injuring the legs. The leg wrap member has at least one tether fastener secured thereto.

Abstract: An improved disposable restraining device having double loops formed of two separate, flexible straps joined together by an interlocking cover is extremely strong, tamper resistant and more easily molded than single strap devices. The device is designed to be folded into a compact storage position which can be easily carried by law enforcement personnel yet is instantly ready for use. The cover provides a shield for the locking mechanism and additional strength in the area between the two loops. The straps include a core material designed to resist friction cutting and the cover may be constructed of a harder material than the straps for maximum strength.

Abstract: An improved disposable double-loop restraining device is tamper resistant, utilizes a non-keyed lock and include a core material designed to resist friction cutting. A coded removable tab is provided for positively tracking a detainee with an arrest record. The device may be folded allowing large quantities to be easily stowed on the person of law enforcement personnel for mass arrest situations, and is brightly colored to assist in readily identifying detained individuals.

Abstract: A handcuff includes a pair of arcuate cuff bow arranged to encircle a human wrist. A locking mechanism on one of the cuff bows releasably engages the other bow to secure the bows around a wrist. A fluid actuated cylinder coupled to the locking mechanism releases the locking mechanism when pressurized fluid, such as air, is applied. The fluid actuated cylinder avoids the use of keys, resulting in a more enclosed structure that is more difficult to pick than prior key-based mechanisms. Use of the fluid actuated cylinder further improves security by making ordinary handcuff keys, which are frequently possessed by or available to prisoners, ineffective to open the handcuffs.

Abstract: A set of handcuffs having an improved locking mechanism. The locking mechanism preferably includes a cylinder lock that is positioned substantially parallel to the pivot axis of the locking arm. The keyway of the locking mechanism is spaced above the plane of the cheek plates of the body of the handcuffs and therefore is more difficult to access by the prisoner than prior art locking mechanisms. The locking mechanism may be set, by insertion of a key into the same keyway, in a ready to lock position in which the handcuffs can only be tightened but not loosened, or in a double locked position in which the handcuffs cannot be tightened or loosened. Preferably, the keyway of the locking mechanism is a restricted keyway such that only keys purchased directly from the manufacturer or someone licensed by the manufacturer or factory can be inserted into the keyway to adjust the setting of the locking mechanism.

Abstract: A disposable handcuff providing a two loop expandable strap restraint for law enforcement formed from a continuous single foldable strap that is light weight, strong, inexpensive, disposable, and can be formed of readily available and readily obtainable materials.

Abstract: A key operated restraining device is provided to create a securing loop of adjustable dimension. The device comprises a locking head portion, an elongated strap insertable into the locking head portion to form a securing loop of adjustable dimension, a support block disposed in the interior of the head portion, and a pawl member. Both the support block and the pawl member terminate in a spaced relation to an interior wall surface of the head portion and form a slideway for the strap portion. The pawl member is connected to the locking head by a resilient hinge structure biasing the pawl member into a locking position wherein the locking structure is operative to lockably engage a plurality of tooth structures on the strap portion and a release position wherein the locking structure is disengaged from the tooth structures.

Abstract: 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.

Abstract: A V-shaped safety shield for a pair of handcuffs including a pair of wristlets interconnected with a flexible chain is provided. The safety shield includes a housing having a first end portion and a second end portion angularly disposed relative to the first end portion. The housing is positionable about the chain of the handcuffs such that the wristlets are extendable from the first and second end portions of the housing in an angular relationship to one another when the housing is positioned about the chain such that upon securing the wristlets about the wrists of an individual the wristlets are disposed substantially concentrically around the wrists of the individual when the individual's wrists are positioned in a substantially corresponding angular relationship.

Abstract: A swiveling handcuff comprises two generally conventional cuffs connected by one or more swivel links. Each swivel link has a pair of spherical lobes joined by a neck. The lobes are captured in respective cuffs. The swivel link provides three degrees of rotational freedom between the cuffs. The swivel links allow enough flexibility to reduce the possibility of injury to a restrained person but also provide enough rigidity to allow a good grip by a user when applying the swiveling handcuff. The swiveling handcuff provides protection for both the restrained person and the user.

Abstract: A handcuff comprises a pair of lockable bracelet members (10, 11), pivotably connected to one another by way of a connecting member (12) wherein is disposed a catch member (29) engagable with the bracelet members to hold them relative to one another in an extended position so that the handcuff may be used as a rigid handcuff, the catch member being disengagable from the bracelet members to enable the handcuff to be folded.

Abstract: A handcuff escort assembly operable to be engageable with a conventional handcuff assembly or an economical handcuff assembly placed about a wrist area of a person being restrained. The handcuff escort assembly includes a handcuff receiver and locking assembly connected to a portion of the handcuff assembly and having a locking block and handle assembly releasably engageable with the handcuff receiver and locking assembly. The locking block and handle assembly includes a locking block member releasably engageable with the handcuff receiver and locking assembly and having a laterally extended main guide handle member. The main guide handle member is provided with a hand grasp section with a hand access slot therein operable to receive the hand and finger area of a security restraining person or user to provide leverage control of the person being restrained due to pressure to be applied against the wrist area of the person being restrained.

Abstract: An improved disposable restraining device having double loops formed of two separate, flexible straps joined together by an interlocking cover is extremely strong, tamper resistant and more easily molded than single strap devices. The device is designed to be folded into a compact storage position which can be easily carried by law enforcement personnel yet is instantly ready for use. The cover provides a shield for the locking mechanism and additional strength in the area between the two loops. The straps include a core material designed to resist friction cutting and the cover may be constructed of a harder material than the straps for maximum strength.

Abstract: An improved double-locking mechanism for handcuffs is disclosed. In the preferred embodiments, a standard pawl and multi-piece slide-bolt assembly have been modified to prevent premature sliding of the bolt into its "double-locking" position, and to prevent dislodging of the bolt back into its "non-locking" position. The unique slide bolt, or the nearby lock casing, is angularly offset to create a fulcrum. The bolt also has an underlying tab that is designed to rest in either of two side-by-side locator notches atop a cuff's pawl. One notch firmly locates the bolt in a double-locking position, while the other notch normally keeps it in a non-locking position. To shift the bolt into its double-locking position, an authorized user presses any suitable actuator (e.g., the tiny end of a handcuff key or a ball-point pen end) against an exposed inclined end of the bolt. This pivots the bolt about the fulcrum and against the casing, so that it lifts the tab out of the non-locking locator notch.

Abstract: An improvement in a handcuff having a rigid central body and lockable wrist shackles for use in conjunction with a prisoner's waist chain. The central body of the handcuff has a slot for receiving a link from the waist chain and a dead bolt and lock set means mounted within the central body of the handcuff for extending the dead bolt through the slot to engage and hold the prisoner's waist chain.

Abstract: An improved hinge assembly is disclosed for interconnecting a pair of handcuffs. In the preferred embodiment, the hinge assembly comprises two parallel single-link hinges that are pivotally attached to the cuffs by trunnion pins. Each link has unique oversized slots, through which the pins extend. This permits the cuffs, when side-by-side, to collapse against one another; and it enables the cuffs to move away from each other for compact wearing over a user's belt. In addition, the trunnion pins are captured within the cuff frames. This avoids tampering found with exposed pivot pins in prior multi-link hinges.