Abstract: A magnetic lock assembly includes a magnetic lock cylinder for actuating a latch assembly, wherein the magnetic lock cylinder including a lock sleeve having an axial rotor hole and a plurality of tumbler sockets radially distributed on an inner surface of the lock sleeve; a plurality of magnet tumblers, each of which has a north pole and a south at two ends respectively, being coaxially placed in the tumbler sockets respectively; a tubular lock rotor being rotatably and coaxially fitted in the axial rotor hole of the lock sleeve, the lock rotor having an axial through hole and a plurality of locking holes radially distributed through a rotor wall thereof; a locker tube being fittedly disposed inside the axial through hole of the lock rotor to define a keyway therethrough; a magnetic key including a round key body having a plurality of magnet sockets provided around the key body corresponding to the axial and radial positions of the magnet tumblers in the magnetic lock cylinder respectively, and a plurality of

Abstract: The apparatus is an electromagnetically actuated lock which has a movable part, which is prevented from rotation or displacement by a barring bolt that extends into a recess of the movable part. Locking pins extend into the barring bolt and which locking pins positively lock the bolt in the withdrawn or retracted position when access is authorized and which locking pins also positively lock the bolt in the extended position when access is unauthorized.

Abstract: The technique for electronically resetting a magnetically sealed solenoid to an unattracted, unactuated position is described for use with solenoids which have either a residual magnetic or a permanent magnet holding force necessary to retain the armature of the solenoid in its actuated position until such time as the armature is either physically displaced by a mechanical force or an electronic signal is applied to the solenoid. This displacement creates a reverse polarity magnetic field, effectively overcoming the magnetic field acting to hold the armature in its actuated position, permitting a small mechanical force to reset the armature. In order to prevent a lock or similar device from being conditioned for opening and possibly left in that condition for a significant period of time while unattended, jeopardizing the security of the container and its contents, the actuation of the armature in the reset or release phase may occur a relatively short time following its actuation.

Abstract: A magnetically actuated safety lock device provides automatic locking capability to doors such as sliding glass patio doors and prevents unsupervised opening of the door by young children, thereby barring their access to dangerous environments. When the sliding door is closed, it is automatically locked. The lock device is installed in a position high upon the sliding door to prevent actuation by young children and requires no permanent modification to the door on which it is installed. The lock device consists of a locking assembly and a magnetic key. The locking assembly includes a magnetized latch assembly and a mounting bracket. The latch is held in the locked position by gravity and is only rotated into the unlocked position through the application of hand pressure or the repulsive force of the magnetic key. The doors can be unlocked from both inside and outside the door. Upon removal of either the magnetic force or hand pressure, the latch rotates back into the locked position.

Abstract: A closure device for a case of an antimagnetic material comprising a box part (1) and a sliding lid (5) requires neither in the lid nor in the box part break-throughs and offers high security against unauthorized opening of the case when at least one permanent magnetic locking pin (4a, 4b) is arranged slideable in the box part (1) at right angles to the plane of the lid (5), and is loaded in the direction of the lid (e.g. by means of a spring) so that the locking pin clasps behind a locking shoulder (6a, 6b; 66) configured on the inner side of the lid when closed. For opening the lid (5) an unlocking plate (7) may then be used comprising at the corresponding location a permanent magnet (8a, 8b) which is magnetized opposite the direction of magnetization of the locking pin (4a, 4b).

Abstract: A security device includes a case having an outside surface defining an interior volume for retaining merchandise and an access opening for receiving the merchandise into the interior volume; at least one notch opening on the outside surface of the case; and a locking mechanism adapted to removably couple to the case and at least partially block the access opening to maintain the received merchandise in the case when the locking mechanism is coupled to the case. The locking mechanism includes a housing, at least one flange extending from the housing for overlying at least a portion of the outside surface of the case, an actuator adapted to slidably extend longitudinally into the housing, engage the notch and couple the locking mechanism to the case when the actuator is in a first position, and a locking device disposed in the housing for fixing the actuator in place when the actuator is in the first position.

Abstract: A flexible material such as garment fabric to be protected against theft is clamped into a lockable security tag. A key can be inserted into a key hole formed in the security tag for releasing the lock and to remove the tag from the garment item. The key thereby has a shape which complements a member of the cam mechanism so as to allow the cam to be operated with the key. A given decoupler is matched to a given batch of security tags, and the given decoupler is not matched to another, different batch of security tags. A certain store, therefore, has a matched decoupler for its tags while another store has a different decoupler which is matched to a different batch. The decoupler is preferably a key. The security tag is thereby provided with a number of pins or prongs which break or bend back if an incorrect key is inserted or if someone attempts to pick the lock.

Abstract: An electromechanical lock system has a lock cylinder including a body, a rotatable core forming a key passage, and carrying at least one magnet, tumblers engageable between the core and the body and shiftable between positions blocking rotation of the core in the body and freeing positions permitting such rotation, a sensor juxtaposable with the magnet in an angular position of the core in the body, anda coupling member juxtaposed with an inner end of the core, forming an inner extension of the passage, and rotatable in the body independently of the core. A mechanically operable element is coupled mechanically to the coupling member and an electrically operable element is coupled electrically to the sensor.

Abstract: A furniture having a concealed drawer with a dual stage locking mechanism for storing and locking particular items in a manner such as to allow two levels of security. The furniture includes a front drawer that is revealed. The front drawer is received within a receptacle defined by a lateral partition disposed proximately at the center of the furniture and a pair of oppositely disposed side aprons. The lateral partition serves to hide the concealed drawer in the event the front drawer is removed. A stop is pivotally mounted to the upper end of the back wall of the front drawer in order to limit the forward travel of the front drawer out of the receptacle. A concealed drawer is disposed behind the lateral partition and on either side or the rear of the furniture. The face of the concealed drawer is configured to look identical to an opposing apron of the furniture, thereby disguising the concealed drawer to anyone who is unaware of its presence.

Abstract: A modular door access control system incorporates a plurality of wireless door modules. Access request signals are transmitted to a remote access control unit. The control unit transmits access authorizing control signals to a respective one of the modules. A newly installed module, in a selected mode, enters into communication with the unit. The unit in turn transmits an identifier to the module for use in identifying itself to the unit subsequently in response to a received access request.

Abstract: A safety lock comprises a spring-loaded tumbler (4) which is arranged in a twistlock cylinder (1) and which is provided with a rotor pin (12) and a housing pin (2) which are arranged in order, for the rotational release of the rotor (3), by means of an insertable key introduced into a keyway (22) of the twistlock cylinder (1). A blocking member (5), which follows the housing pin (9) in the event of an attempt to unlock the lock, has a part (11) which is guided displaceably in the housing pin (9) and which is connected magnetically to the rotor pin (12).

Abstract: A locking system comprising a fixed portion secured to a box with a slot for inserting an article to be protected, and a movable portion with a latching member for partially sealing the insertion slot in the locked position. The system further comprises means for preventing the movable portion from being moved unless a specific tool is used. The fixed portion has a rear guide extending in a substantially longitudinal direction, and a front projection with an opening having a substantially longitudinal rear section and an angled section extending therefrom up to the upper edge of said front projection.

Abstract: A vehicle door lock apparatus utilizes Hall-effect sensors for the position of an element in a latch or locking system and, according to the invention, the Hall-effect sensor chip or the evaluating circuitry enables the generation of first control signals when the first information signal current amplitude is above an upper threshold, the generation of second control signals with a second information signal below the upper threshold is above a lower threshold and an alarm signal when the information signal is between the lower threshold and zero. In this manner defects in the Hall-effect sensor, the conductive path between the Hall-effect sensor and the evaluating circuitry and in the current supply to the Hall-effect sensor can be detected simply and economically.

Abstract: A key cylinder rotatable about an axis and a motor-vehicle door latch having a housing are used with a position-sensing system having a selector nut made of a nonferromagnetic material and coaxial with and coupled to the key cylinder for joint rotation about the axis therewith, an actuating permanent magnet imbedded in the selector nut and movable in an orbit about the axis on rotation of the selector nut about the axis, and a hall-effect sensor mounted on the latch housing at a small spacing from the orbit.

Abstract: An electric clutch system for a mortise-type security lock is provided. The clutch system includes one or more magnets disposed in one hub of a mortise-type lock. The magnet is recessed and disposed below the interior surface of the hub that engages the opposing hub of the mortise-type lock. The opposing hub includes one or more spring-biased armatures. Upon the application of current to the magnet, the armature is drawn toward the magnet resulting in a coupling-type connection between the two hubs so that rotation of the exterior handle will open the door.

Abstract: An electronic lock for use with lockers has a recess or contacts for accepting an electronic ID chip as a "key". Upon receiving the current ID chip, the lock shifts a latch to unlocked position, with the latch or mortise being spring-biased. The construction of the electronic lock is modular, easily fitting on nearly all contemporary locker designs, retained by only a few screws preferably in the standard three-hole locker door prep layout. An outer housing on the outside of the locker door has an electrical plug-in connection through the door with an inner housing at the inside of the door, and the housing portions can be changed to opposite hand use. Power input ports preferably are included on the front of the outer housing to power the lock in the event of battery failure, and in addition, an audible beep occurs when batteries are low. An LED indicator can be included for status.

Abstract: The present invention provides a detent mechanism adapted to be mounted on a container which is to contain one or more articles, notably CD cases, which container has an access aperture through which the article(s) can be inserted into or moved from the container. The detent mechanism is adapted to retain the article within the container and is formed from a mounting member adapted to be carried externally in the container, preferably at or adjacent the access aperture of the container. A latch member is adapted to be carried externally of the container by the mounting member and is movable between a retracted position at which at least the distal end of which is adapted to retain an article within the container. The latch member is also movable to a extended position in which latch member permits removal of the article through the access aperture by being located out of the line of travel of the article as the article is withdrawn from the container.

Abstract: A motor vehicle door lock has a key operated lock cylinder signalling antitheft and locking-and-unlocking positions via Hall effect chips which include electronic circuitry working into evaluation circuitry connected to the chips. The chips themselves can be selected from a series of mass produced chips based on criteria including the magnetic thresholds and electrical thresholds of the chips provided that the thresholds of the evaluation circuitry are selected appropriately matching of each chip or its Hall effect element to the system is thoroughly avoided.

Abstract: A flat metal key has a groove-shaped recess in the narrow side of the bow for receiving a transponder as a code transmitter, a ferrite coil and a line connecting the ferrite coil with the code transmitter.

Abstract: A self-powered lock incorporates a generator within the dial housing. The generator incorporates a plurality of coils and two concentric rings of magnetic segments. The rings are mounted on a dial housing, capable of rotation, and rotation of the dial housing generates operating power for the lock. Dial rotation rotates another ring of magnetic segments to input data necessary for lock operation.

Abstract: A lock system has a lock cylinder pivotal about an axis between a pair of end positions and through a center starting position, a key fittable into the cylinder and actuatable to pivot the cylinder between its positions, an arcuate magnet centered on the axis and coupled to the cylinder for joint movement therewith, and a pair of angularly spaced Hall-effect sensors adjacent the magnet, trippable by the magnet to generate respective outputs, and positioned such that in the central position the magnet is closely juxtaposed with and trips both sensors, in one of the end positions the magnet is closely juxtaposed with and trips only one of the sensors and is spaced from the other of the sensors, and in the other end position the magnet is closely juxtaposed with and trips only the other sensor and is spaced from the one sensor.

Abstract: A motor-vehicle door-latch system has a key cylinder pivotal about an axis from a center starting position into a pair of opposite end positions flanking the center position, a key insertable into the cylinder only in the starting position thereof, a latch operable by the cylinder on displacement of same into one of the end positions, and an arcuate magnet pivotal about the axis, polarized generally parallel to the axis, and coupled to the cylinder for joint angular movement therewith. A pair of hall-effect sensors are juxtaposed with the magnet and positioned such that in the central position the magnet is closely juxtaposed with both sensors, in the one end position the magnet is closely juxtaposed with one of the sensors and is spaced from the other of the sensors, and in the other end position the magnet is closely juxtaposed with the other sensor and is spaced from the one sensor.

Abstract: A centrifugal clutch for use with a power door lock actuator. The centrifugal clutch includes an independently rotatable pinion cup having an integral pinion gear which meshes with a jack screw, and a driver rotatably secured to an output shaft of a drive motor. The driver has at least one radially outwardly opening recess formed therein with at least one slider slidably retained within the recess. The slider is biased in a radially inward direction by magnetic lines of force which are provided by a permanent magnet mounted within the driver. Alternatively, a number of sliders can be formed of magnetic material such that the magnetic sliders are mutually attracted to one another in a radially inward direction. A centrifugal force is generated when the driver is rotated. The centrifugal force overcomes the magnetic attractive force to throw the sliders radially outwardly into positive driving engagement with the pinion cup.

Abstract: A security device includes a case with a lid to receive merchandise and a locking mechanism for latching the case closed. The locking mechanism has a housing with parallel flanges to overlie a portion of the lid and another surface of the case, preventing the lid from being opened. One end of the locking mechanism is fixed and the other is movable between open and closed positions, and a mechanism in the housing retains the movable end closed. A decoupler is provided for opening the locking mechanism.

Abstract: An electromechanical cylinder lock includes an outer lock shell and a rotatable lock barrel located therein which is controlled by dual locking features. A side bar or fence selectively blocks and permits rotation of the barrel with respect to the shell in response to insertion of a key into a keyway in the barrel. The barrel includes a plurality of electromechanical locking members with grooves formed therein, the locking members being movable to a position in which the grooves are aligned to accept the side bar or portions thereof. An electromagnetic core disposed in the barrel is energized in response to a control device which determines whether an attempt to open the lock is authorized, the magnetic core rotating the electromechanical locking members to a desired position relative to the side bar to allow rotation of the barrel. The locking members may be flat disc-shaped elements with a portion cut out to form a groove.

Abstract: An electromechanical locking mechanism which can execute a pulse-control for the locking or unlocking of door panels. A bistable electromagnet interacts with an appropriately shaped lever so that a permanent magnet which is fastened to the lever arm and a permanent magnet which is fastened to a mounting plate repel one another and can thereby move the lever into a secure position, namely into a locked or unlocked position.

Abstract: Programmers for an entry control system employ data carriers housing ROM chips. The ROM chips are affixed with unique elemental codes. A keypad addresses the chips in one-to-one correspondence with the keys to transmit the unique elemental codes to the programmable processor of the entry control system.

Abstract: The present invention provides an electronic lock with a deadbolt actuator. The actuator has, a casing, a deadbolt shaft protruding through the casing and an eccentric in said casing attached to said deadbolt shaft to rotate with the deadbolt shaft. A pair of pusher blades are connected to an interior handle supporting tube extending into said casing. The pusher blades are connected to a main bolt shaft to rotate said pusher blades relative to each other wherein the shaft rotates one of said pusher blades while said other pusher blade is not rotated. The pusher blades are in selective contact with the eccentric and move the eccentric from a first position wherein the deadbolt is retracted and to a second position wherein the deadbolt is extended to a locking position. The deadbolt is extended and retracted by either turning the interior thumb turn or turning an exterior handle in an appropriate direction.

Abstract: A container of the kind (1) having an area (4) on one of its faces (5) including an articulation line (6) about which it tends to flex in order to provide an opening (3) on an adjacent face to release the contents. Locking device, consisting of a bolt (8), hold the area (4) coplanarly with the face (5) including the same in order to provide a safety closure.

Abstract: A process to operate a locking system for lockable objects which features a key module having a remote control unit and a transponder for transmitting and receiving coded signals, and a lock module, fitted inside or on the lockable object, comprising a receiver unit for detection of coded signals, an evaluation unit for verification of coded signals, and a control unit for actually carrying out the unlocking or locking operation on the lockable object. A bidirectional data transmission between the key module and the lock module takes place before unlocking or locking of the object. On receiving an unlocking or locking signal sent out by the key module, the lock module will go into a waiting or standby mode and itself send out control signals by use of a transmission unit. When the user approaches the lockable object, one of the control signals will be received and evaluated by the transponder of the key module.

Abstract: A programmable electronic lock is provided. The electronic lock described herein employs many programmable features which enable a user to tailor lock functions for appropriate levels of security and convenience. The features are enabled and tailored via a set of operating parameters stored in an operating parameters data base within the lock. A lockable device employing the present lock may achieve levels of security and flexibility greater than those achieved utilizing conventional locks. Several of the features included in the lock are a timelock early feature for securing the lock prior to a programmed locking time; an idle key life feature for deactivating idle keys from the lock; a variable PIN code requirement structure for convenience and security; and a deposit logging feature for deposit doors.

Abstract: A security device includes a case having a bottom open end to receive merchandise, a top surface, two opposing ends and two opposing sidewall surfaces; at least one tab protruding from the case; and a locking mechanism for maintaining the received merchandise in the case. The locking mechanism includes a base housing including at least one slot to receive and retain the tab to help secure the case to the locking mechanism, at least one flange extending from the base housing to overlie at least one surface of the case, and a movable member. The moveable member (i) maintains the received merchandise in the case by blocking the front of the bottom open end and securing the tab in the slot when the locking mechanism is closed and (ii) disengages from the front of the bottom open end when the locking mechanism is open allowing the tab to become fully separated from the slot and the locking mechanism to become fully separated from the case. A decoupler is provided for opening the locking mechanism.

Abstract: An anti-theft box displays goods that are attractive by theft in shops and department stores. The anti-theft box includes a cassette (10) having a lid (11). An element is provided on or in the anti-theft box for wireless activation of an alarm device if the anti-theft box is carried through an exit of a shop or a department store. A lock mechanism is provided on the inside of the lid, which includes a lock slide (15) provided with lock bolts (16), which can be displaced in plane parallel fashion in order to bring the lock bolts into and out of locking engagement with the cassette (10). A latch mechanism (36) is provided to latch, in an engaged position thereof, the lock side with the lock bolts in the engaged position and can be actuated to a disengaged position by means of a special tool to allow displacement of the lock bolts from the engaged position.

Abstract: The remote controlled security device which can be controlled by a radiant energy transmitter so as to lock or unlock it, is mounted on the inside wall of a container and has a locking bar which is engageable with a locking plate that has an aligned opening for receiving locking bar of the security device. The locking bar can be moved by stepper motor from the locked to the unlocked position in response to actuation of the remote control transmitter to allow the door of the container to be locked or unlocked. There is also provided a key with an opening which can be inserted through the wall of the container to engage a projection which has the same shape as the opening in the key to allow the lock to be manually locked or unlocked.

Abstract: A locking apparatus for use on a handle operable to be gripped by a user's hand. The apparatus includes a moveable actuator operable to be moved by a portion of a user's hand when gripping the handle. A first moveable blocking member is connected to the handle and is operable to be moved into an enabling position in which movement of the movable actuator is enabled and is operable to be moved into a blocking position in which movement of the actuator is blocked by the blocking member interfering with movement of the actuator. A first mounted magnet is connected to the first blocking member and is disposed in a position on the handle such that at least one of the user's fingers will be adjacent the first mounted magnet when the handle is gripped. The first mounted magnet is operable to cooperate with a first adjacent magnet placed adjacent the first mounted magnet to move the first blocking member between the blocking and enabling positions.

Abstract: A manipulation resistant combination lock includes a housing, a drive cam attached a drive shaft, a moveable bolt, a fence attached to a fence lever, and tumbler wheels. A fence lever is pivotally attached to the bolt, and has a nose portion engageable with a drive cam gate in the drive cam which is keyed to the drive shaft and includes two spaced multi-surface contact rollers of magnetically attractable material on opposite sides of the drive cam gate. Each contact roller has a plurality of non-identical surfaces which is uniquely radially positioned and oriented relative to the axis of rotation of each contact roller. A permanent magnet is mounted in the nose portion of the fence lever thereon to assert an attraction force which rotates the contact roller as the contact roller approaches the nose portion of the fence lever due to rotation of the drive cam.

Abstract: A new Protection Device For Key Lock Openings for preventing moisture and dirt from entering key locks. The inventive device includes a dome-shaped cap, a handle on one side of the cap, and a magnetized clip extending from the other side of the cap and sized to fit within a key lock opening.

Abstract: In a locking system comprising a lock unit and a key unit, each of which has an induction coil for transmitting power and data, the induction coil on the lock side is mounted by via a coil carrier on a lock body in the lock unit. Between the induction coil on the lock side and the lock body, there is a screening body which magnetically screens off the lock body from the induction coil on the lock side.

Abstract: A lock cylinder set to a lock has an outer cylinder serving as a housing. In the outer cylinder, a first inner cylinder into which an electronic key is inserted and a second inner cylinder connected to a locking/unlocking mechanism of the lock are rotatably set. A connecting pin is movably held by the first inner cylinder to connect the first inner cylinder with the second inner cylinder when the pin advances. A connecting pin control mechanism advances the connecting pin to mechanically hold the advance state of the pin when a proper key is inserted and retreats the connecting pin when the key is extracted. The connecting pin control mechanism has a cam plate contacting the protrusion of the connecting pin. The connecting pin retreats when the cam plate tilts and advances when the cam member rises.

Abstract: A multishaft combination lock includes a lock body, an alignment sleeve, and a detachable pin. The alignment sleeve has a hole and is rotatably coupled to the lock body to provide access into the lock body. The alignment sleeve has an angled cutout at a first end, with the alignment of the cutout being adjusted by rotating the alignment sleeve. The detachable pin has a floating bushing that can be misaligned with the principle axis of the detachable pin. To lock the multishaft combination lock, the lock body is fitted to the detachable pin through the hole of the alignment sleeve with the floating bushing misaligned with the angled cutout. When the detachable pin is fully inserted into the lock body, the floating bushing is positioned beyond the end of the alignment sleeve within the lock body and becomes misaligned or offset with the alignment sleeve. To unlock the lock, the alignment sleeve is rotated so that the angled cutout is aligned with the floating bushing of the detachable pin.

Abstract: The device for electromagnetically blocking the closing cylinder (2) of a lock (1) includes a rotary drive comprising a coil (12) and a rotor (7). Depending on the rotary position of the rotor (7), the movable tumbler (4) may be disengaged from the recess (3) of the locking cylinder. In the blocking position, disengagement is prevented by abutment on the end face (11) of the rotor. (FIG.

Abstract: The invention pertains to a device for blocking the operation of a motor vehicle comprising a mechanical lock 5, by means of which the shifting operation of the transmission in the motor vehicle may be blocked, an actuating device 6 that is controlled by electrical signals and actuates the mechanical lock 5, and a coded transponder 7, by means of which the electrical signals that control the actuating device 6 are triggered once the code has been identified.

Abstract: A magnetic key operated lock has an anti-rap arrangement which comprises a magnet pin supported in a bar mounted in a slide member. The remote end of the pin fits into an aperture in a locking plate and is pivoted to swing downwards out of the aperture when a correctly coded key is inserted into the lock. The correctly coded key has a repelling spot to pivot the magnet as required and before the key attempts to move the slide member from its locked position. Rapping on the face of the lock cannot move the remote end of the magnet pin out of the aperture because it is restrained by its pivoting action from moving laterally out of the locking plate. Another anti-rap arrangement includes a padlock incorporating both anti-rap arrangements.

Abstract: A magnetic card key-operated locking device is disclosed. The locking and opening motion of the locking device is performed by a magnetic interaction between the card key and a plurality of magnetized pins. The pins are movably placed in a plurality of holes of a perforated stationary plate, a perforated operating plate and a movable plate. The pins are repulsed by a magnetic plate to cause the operating plate to be coupled to the stationary plate and thereby lock the locking device when there is no card key in a key insert slot. However, when there is a card key in the key insert slot, the pins are repulsed by the card key toward the magnetic plate to cause the operating plate to be separated from the stationary plate but to be coupled to said movable plate and thereby open the locking device.

Abstract: A magnetically coded lock assembly has a lock having a housing formed with a key slot, a latch element movable in the housing between a locked and an unlocked position, and at least one magnet wheel in the housing rotatable adjacent the slot about a wheel axis. This magnet wheel is provided with a magnet, operatively engageable with the latch element, and displaceable between a blocking position preventing the latch element from moving from the locked to the unlocked position and a freeing position not blocking such movement of the latch element. A key has a body fittable in the slot and formed with at least one seat and a respective magnet-carrying disk rotatable in the seat about a disk axis through a plurality of angularly offset positions. Each disk is closely juxtaposed with a respective one of the wheels when the key body is fitted in the slot.

Abstract: A security apparatus for attaching a portable unit to be protected to a supporting surface. The security apparatus includes a normally deactivated passive locking unit, which is activated by an electronic key unit, which is portable and moved adjacent to the passive locking unit to power it. The key unit includes a device for coupling electromagnetically the key and the locking units to transmit electrical power therebetween. A magnet is concealed within the security device to activate the electronic key, only when it is placed in the proper position relative thereto. Additionally, a mechanical arrangement for a locking pin is employed to further provide a level of sophistication before the actual unlocking of the device occurs.

Abstract: The apparatus is an improved magnetically operated locking device having a key and a cylinder. The cylinder has a longitudinal axis with a stator and a rotor. An interface is defined between the stator and the rotor. The rotor is rotatable by the key above the longitudinal axis of the cylinder. The improvement of the present invention includes a plurality of magnets on the key which are cooperative with a plurality of magnets mobile in the cylinder. The plurality of magnets on the key are gripped in sheaths of ferromagnetic material. The plurality of magnets on the cylinder are also gripped in sheaths of ferromagnetic material. The magnets of the cylinder are slidable in an area of the interface in holes formed within the cylinder. The plurality of magnets in the cylinder are slidable in the hole so as to lock the rotor against rotation relative to the stator. The magnets of the cylinder are magnetically identical and identically geometrically distributed as the plurality of magnets in the key.

Abstract: A locking device has a non-magnetic pin and a button, the non-magnetic pin having a base and a post projecting perpendicularly therefrom, extending to a free end, with an indented portion close to the free end. The button is an enclosed non-magnetic unit, having a hole at the lower surface adapted to receive the free end of the post, and also enclosing a plurality of locking plates each supported at an outer portion by a compressible support material, and adapted to retain the pin at the indented portion in a locked position within the button, but to rotate upwards and release the pin in response to a magnetic force directed at the upper surface of the button. The magnetic force can be applied by a magnet mounted within a protective shield adapted to fit over the button.

Abstract: A security device includes a case with a lid to receive merchandise and a locking mechanism for latching the case closed. The locking mechanism has a housing with parallel flanges to overlie a portion of the lid and another surface of the case, preventing the lid from being opened. One end of the locking mechanism is fixed and the other is movable between open and closed positions, and a mechanism in the housing retains the movable end closed. A decoupler is provided for opening the locking mechanism.

Abstract: A magnetic security device for preventing unauthorized opening of fire hydrant valves includes an inner cylindrical member which is fixed to a nut on the valve stem and an outer rotatable member which is coupled to the inner cylindrical member by a magnetizable element. The magnetizable element is attracted to move from an uncoupled to a coupling mode by a reaching permanent magnet integral with a special operating wrench. In accordance with one embodiment of the invention, an intermediate sleeve is provided which is coaxial with a nylon sleeve disposed around the outer surface of the inner cylindrical member. In addition, the inner cylindrical member has a knurled portion which engages the surface of a recess surrounding the valve operating nut so that if the outer operating member is tilted with respect to the inner operating member, the inner operating member binds with the wall of the recess, preventing rotation of the inner operating member and of the valve operating nut attached thereto.