Abstract: A mechanism for locking and unlocking an electronic safe lock barrel which is provided with a retaining long key and is fastened with a rotary mechanism located on the outside of the safe door. The lock barrel has a portion which is located in the inside of the safe door and is provided with a position confining slide sleeve. The position confining slide sleeve is fastened at the rear end with a motor having a rotary shaft which is engaged with a threaded sleeve capable of displacing back and forth. The threaded sleeve is provided with a retaining slot for retaining the retaining long key of the lock barrel so as to prevent the lock barrel from being turned by the rotary mechanism. The motor is operated by the circuit to enable the threaded sleeve to retain or release the retaining long key of the lock barrel, thereby controlling the locking and the unlocking mechanisms of the electronic lock.

Abstract: A mortise lockset incorporates an electrically actuated clutch within the lock case. The clutch selectively engages one latch operator to permit access through a door equipped with the lockset. The lockset further includes a key rotatable cam for retracting the latch. The lockset includes a lock bar that permits retraction of the latch by means external to the lockset. An extended throw deadbolt-like latch is held in a retracted position by an auxiliary latch and hook until released by retraction of the auxiliary latch. The latch incorporates a recessed roller in the projected end of the latch to facilitate latch deployment.

Abstract: An electrically operated, strong, security system comprising a lock with remote control installed in a wall adjacent to a door frame or under a door. The lock comprises at least one rod which extends into the door when the door is closed and in a locked state. In an unlocked state an actuator retracts the rods from the door, back into the door frame or into the floor. The security lock system provides a manual control for the lock inside a house or building along with indicator lights showing the lock status. An emergency DC battery provides power for the security lock if there is a primary power outage. A remote control locks all doors in the house simultaneous that have such a security lock, and the remote control unlocks only the door or doors selected to be unlocked.

Abstract: An electro-mechanical latching apparatus for an enclosure such as a vending machine and including an electronic lock controller for disengaging a latch assembly securing the door of the enclosure against the enclosure frame in a closed, locked position. Upon actuation, the lock controller disengages the latch assembly and enable the door of the enclosure to be moved to an open position for accessing the enclosure.

Abstract: Electronic barrel comprising a barrel body and a rotary-lock key bit, the barrel body comprising at least one rotor having a common axis with the body and the rotary-lock key bit and freely rotating in said body, a clutch part coupled in rotation with the rotor and comprising meshing means co-operation with additional means matching the key bit so as to drive in rotation said key bit by the rotor under the action of a rotating torque of the key, and locking means for preventing the clutch part from being translated when there is no recognition of an identification code transmitted between the key and the barrel, characterised in that said locking means are further mounted integral in the rotary-lock key bit and the rotor is mobile in translation for thrusting the clutch part towards the key bit when said identification code is recognised.

Abstract: An electronic lock which cannot be easily tampered with by using a strong magnet. It includes: (a) a housing; (b) an electromagnetic element disposed in the housing and provided in the center thereof with a receiving slot and a hole penetrating through the receiving slot; (c) an elastic element disposed in the receiving slot of the electromagnetic element; (d) an actuation block provided with an arresting ring, a protruded pillar which is fitted into the elastic element and the hole of the electromagnetic element; (d) a connection shaft coupled at one end thereof with the actuation block; (e) an action piece mounted on the connection shaft and located outside the actuation block and the electromagnetic element; and (f) a handle having a rotary shaft fastened pivotally with the connection shaft. The action piece is attracted towards the electromagnetic element and abuts against an end of the arresting ring when the electromagnetic element is actuated.

Abstract: A remotely controllable lock includes a turn knob rotatably mounted to a main housing. The turn knob includes an axle rod with a non-circular hole through which a spindle of the lock extends. A power element is mounted in the main housing for driving a relatively larger gear of a power device. The relatively larger gear and a relatively smaller gear are integrally formed on a common shaft that has two ends to which two slide blocks are pivotally mounted, respectively. The slide blocks are mounted in a receiving hole in the main housing and a receiving hole in a fixing plate. The slide blocks are biased by elastic elements. One of the slide blocks includes a stub that extends beyond the associated receiving hole to come in contact with a sensor. The sensor sends out a signal to stop the power element. The relatively smaller gear meshes with a control gear of a control device. The control gear is rotatably mounted around the axle rod of the turn knob.

Abstract: A locking mechanism for engaging a strike includes a frame having a receptacle configured to receive the strike and a locking pin reciprocally mounted to the frame for reciprocating between a retracted position and an extended position. The locking pin is configured for mating with the strike when the locking pin is disposed in the extended position. A drive link extends from the locking pin and a motor is provided for driving a drive shaft. A spring shaft has one end engageable with the drive shaft. A coupling is disposed between a second end of the spring shaft and the frame. The drive link is configured to engage individual coil surfaces of the spring shaft during rotation thereof to drive the locking pin towards the retracted or extended position.

Abstract: An electromagnetically controllable safety lock includes a locking bar which moves a slider, which is provided with teeth and which carries a blocking plate equipped with a passage pin channel. The blocking plate is coupled via a spring to a control plate, which has an angularly offset passage pin channel. The control plate supports an armature, which can be held by an electromagnet, fixed to the housing when the locking bar is subjected to a control movement. Both channels are aligned with the lock axis during an opening action so that the passage pin has a free path.

Abstract: A lock assembly is described for a personal computer. The assembly comprises a lock member movable between a locked position and an unlocked position and a shape memory wire arranged to move the lock member between the lock position and the unlocked position in response to one or more electrical signals that generate currents therein.

Abstract: A lock suitable for use in a motor vehicle door has a rotary latch, a locking wedge, a pawl, a setting device, and a transmission device wherein the rotary latch cooperates with the locking wedge to be locked in a locking position by the pawl. Upon actuation of a manipulator, the setting device brings the pawl electrically at least into one opening position. The transmission device brings the pawl into its opening position by actuation of the manipulator over a displacement range which is greater than a displacement range of an electric unlocking.

Abstract: An electronic combination lock is disclosed which allows access to a closed or secure location wherein the lock includes a locking mechanism for operating between a locked condition and an unlocked condition. A rotatable cam wheel has a circumferential surface portion defining a slot such that rotation of the cam wheel moves the slot. A movable lever is coupled to the locking mechanism for changing the condition of the locking mechanism from the locked condition to the unlocked condition and is pivotably movable into and out of engagement with the cam wheel. The movable lever engages the cam wheel such that rotation of the cam wheel changes the condition of the locking mechanism. A cantilever and detent on the lever releasably maintain the lever in a position disengaged from the cam wheel.

Abstract: A door lock system includes a clutch mechanism for a lockset and has particular applicability in conjunction with lever handles. Two coupling assemblies are selectively rotatably coupled by a coupling pin. One coupling assembly is rotatably coupled to the lockset actuator. The other coupling assembly is rotatably coupled to the exterior door handle. A drive assembly includes a motor and employs an injector which has a movable arcuate shoulder and which selectively controls the position of the coupling pin to provide for the locking and unlocking functions.

Abstract: A door system has a plurality of doors coupled to communication lines which interconnect the doors. The doors have a first outer face having an opening therein and a second outer face spaced a predetermined distance apart from the first outer face. A void is located between the first and second outer face and is sized to receive at least a portion of an integrated door unit. A wiring harness is located between the first and second outer faces. The wiring harness has a connector coupled thereto. The wiring harness is coupled to the integrated door unit. A sensor is coupled to the integrated door unit. To communicate, the integrated door units have a memory storing an address, and a data map. The integrated door units form output data words using the address and the data map.

Abstract: This mechanism is intended for being located in the inner escutcheon of the lock and its purpose is to minimise the forces transmitted, thereby preventing premature wear, as well as being able to be adaptable to any lock. Its structure permits to minimise the turning of the handle or outer operating knob under no load.

Abstract: An assembly that engages a component to a computer system includes a cover adapted to retain the component and to be inserted within a chassis of the computer system. A slide movably coupled to the cover has a proximal position associated with inserting the cover into the chassis and a distal position associated with withdrawing the cover from the chassis. A detector coupled to a lock and to the slide detects movement of the slide to actuate the lock. The lock is coupled to the slide and to the detector, and blocks movement of the slide towards the distal point when the lock is in an engaged state.

Abstract: A lock with an electromechanical coupling device, which only consumes little electrical power, comprises an operating handle which constantly is in operative connection with a drive member of an electromechanical coupling device and upon recognition of an authentication code makes an operative connection with a driven member, which in turn is in constant operative connection with the operating mechanism of the lock. The drive member and the driven member of the coupling device are each spring-loaded into a rest position and can be coupled via a locking mechanism, which by means of an electromechanical transducer can be switched between a disengaged position and an engaged position.

Abstract: A device for locking and unlocking a door, in particular a motor vehicle door, has an electric lock and a door handle, with the transmission of query information to a portable electronic authorization ID means being initiatable via a control unit provided for the door when the door handle is operated out of the resting position in opposite directions, with the authorization ID means causing the transmission of identification information on receipt of the query information, and with the control unit comparing the identification information received with predetermined authorized identification information and, if it agrees with some of the predefined identification information, the locking of the door or its unlocking with the release of the catch is executed or canceled by controlling the electric lock.

Abstract: An automotive rear deck lid actuator assembly including an electronic filter that reduces electromagnetic interference (EMI) conduction and a shield that limits EMI radiation. The assembly includes a clamshell-type housing closed by a flat metal backplate. An actuator power supply terminal and an actuator ground terminal are supported on the housing and connect the actuator assembly to a vehicle electrical system. An electric motor that drives a latch mechanism is disposed in the housing and includes a motor power supply terminal connected to the actuator power supply terminal and a motor ground terminal connected to the actuator ground terminal. The electronic filter is disposed in the housing is and connected between the motor terminals and the actuator terminals. The shield is disposed in the housing, at least partially surrounds the motor and is connected to ground.

Abstract: A lock arrangement having a driver element which has two outer surface sections. The first section has a first geometrical cross-section configuration which engages an outer lever spindle in both the locked and unlocked condition. In the unlocked condition, the first section also engages an outer driver spindle which rotates with the outer lever handle and outer lever spindle and engages the latch retraction structure for retraction of the latch. In the locked position, the second outer surface section of the driver element is aligned with outer drive spindle and the second surface section is free of driving engagement with the outer drive spindle such that retraction of the latch is prevented when the outer lever handle is rotated. A solenoid is provided on the interior of the lock and controls the movement of the driver element between the locked and unlocked positions.

Abstract: A keyless locking system includes a housing in a generally rectilinear configuration having a plate with peripheral edge walls to form an open housing there between. A rotatable assembly is secured to the front wall and includes a visible rotator extending inwardly from the front wall and a cylindrical shaft extending through the front wall. A C-shaped channel member extending interiorly from the front wall to encompass and contact the sides of the deadbolt. A gearing assembly includes a large gear coupled to the channel member and a smaller gear and an intermediate gear whereby rotation of the intermediate gear will rotate the smaller gear and then the larger gear to rotate the channel member and deadbolt to lock and unlock the door. A motor within the housing with an associated battery drives the intermediate gear. An electronic assembly effects the driving of the motor and intermediate gear in a first direction and then a second direction.

Abstract: A deadbolt locking actuator includes a housing mounting a reversible motor. A worm is fitted on an output shaft of the motor and meshed with a worm gear. A rotary arm is provided outside of the housing and coupled to the worm gear. A pin on the rotary arm is received in an elongated slot of a link connected to a manual locking lever of a door latch. A control circuit operates the drive unit and link between deadbolt and non-deadbolt positions.

Abstract: An integrated, flexible interrogator-coil circuit provides security for the type of lock opened by a key that transmits a coded signal to an interrogator circuit associated with the lock. When the key is inserted into the lock, a coil in the key is brought into proximity with an energized coil associated with the lock. The resulting current induced in the key's coil causes the key to transmit the coded signal. If the coded signal is recognized by the lock's interrogator circuit, the key opens the lock. The lock coil is an etched metallic spiral on a loop portion of the circuit board and the interrogator circuit components are mounted on a base portion of the circuit board on which is etched a metallic circuit pattern. The integrated interrogator-coil circuit is faster and more economical to manufacture. Because the circuit is on a flexible circuit board, it can be made a part of the lock assembly itself, thus facilitating use of this type of security system.

Abstract: A door lock assembly which includes an electronic card reader is provided whereby when the clutch assembly is in the activated position, rotational movement of the outside handle is transmitted by way of a spindle through the mortise and through the clutch assembly to a clutch disk disposed between the mortise and clutch assemblies and the inside housing. The clutch disk is disposed inside the door. Rotational movement of the clutch disk is then imparted back towards the door through a drive disk and hub drive to the mortise latch hub which is disposed in the mortise housing disposed inside the door structure. As a result, the clutch disk and clutch assembly can be disposed between the inside housing and the inside door surface and the electronic components of the card reader and clutch assembly can be conveniently housed in the inside housing assembly.

Abstract: A safety lock, particularly a self-locking lock, including at least one l catch and a bolt operable by a lock cylinder and a split latch nut. For creating a particularly inexpensively manufacturable and relatively narrow safety lock, a coupling device of the lock is provided with two congruent racks which have a panic or freewheel function. The racks are superimposed and mesh with the teeth of the inner and outer nut. An electromagnetic coupling is achieved with the aid of a coupling lever, which is fixable to each rack directly or indirectly subjects to the function of the particular rack and engageable with a detent of the racks.

Abstract: A computer anti-theft system that includes a remote transmitter unit carried by the user, a dongle that physically attaches and selectively locks onto the parallel port on an existing computer, and a software program that is loaded into the computer's memory. When the system is activated, the remote transmitter unit transmits a pulse code signal which is received by a receiver component located inside the dongle. When the pulse code signal is received, the dongle is elevated to an active state. The dongle then transmits a return pulse code signal to the remote transmitter unit and the loop continues. If no pulse code signal is received, the dongle, is elevated to an alarm state. An alarm pulse code signal is then broadcast to the remote transmitter unit and elevating it to an alarm state. In one embodiment, the software program is used to control a solenoid inside the dongle which prevents removal of the dongle from the parallel port.

Abstract: A lock device, in particular for doors of motor vehicles, has lock elements such as at least a rotary latch and a pawl, wherein at least one lock element (a pawl) can be connected via connecting elements with at least one handle or such connection can be eliminated. An actuator device has a cam disk of the lock device, the connection being made or eliminated as a function of the cam disk.

Abstract: An electrically operated, strong, security system comprising a lock with remote control installed in a wall adjacent to a door frame. The lock comprises rods which extend into the door when the door is closed and in a locked state. In an unlocked state an actuator retracts the rods from the door, back into the door frame. The security lock system provides a manual control for the lock inside a house or building along with indicator lights showing the lock status. An emergency DC battery provides power for the security lock if there is a primary power outage. A remote control locks all doors in the house simultaneous that have such a security lock, and the remote control unlocks only the door or doors selected to be unlocked.

Abstract: A vehicular door lock control apparatus for unlocking a door lock mechanism includes a key for performing a first unlocking operation and a second unlocking operation. A door key cylinder is actuable to an unlock position by using the key. The key is insertable into the door key cylinder. A transmitter-receiver is disposed at the key, and transmits an answer signal that indicates a specific identification code upon receipt of at least one of a power signal and an inquiry signal. An operating force transmission mechanism, actuable between a transmission mode and a non-transmission mode, transmits an unlocking force applied by the key during the second unlocking operation to the door lock mechanism when in the transmission mode.

Abstract: A vehicle door latch device comprises a locking lever displaceable between locked and unlocked positions, an antitheft member displaceable between an antitheft position for disabling an unlocking operation of an inside locking button and an antitheft cancelling position, a motor for changing the locking lever into the locked position by a predetermined amount of normal rotation thereof and for changing the antitheft member into the antitheft position by a continuous normal rotation thereof beyond the predetermined amount, a controller for carrying out a locking operation and an antitheft operation, and a power supplying circuit having a normal rotation circuit for supplying power to the motor for normal rotation and a brake circuit for causing the motor to generate electrical brake. The motor is connected to the brake circuit after the locking lever is changed into the locked position by the locking operation.

Abstract: An antitheft system for a motor vehicle includes a transponder having a charging capacitor which is wirelessly charged by energy signals from a transceiver. The level of the energy being transmitted depends on the quality of an inductive transmission between the transponder and the transceiver. Too little energy is transmitted if the exciting frequency of a transceiver oscillating circuit does not correspond to its resonant frequency due to component tolerances. In order to ensure that the charging capacitor is always quickly and properly charged, the exciting frequency is varied within a predetermined frequency range during a charging phase so that it passes in the vicinity of the resonant frequency at least once.

Abstract: The object of the invention is a motor vehicle door lock with an outer housing (11) with an entry slot (12) for a lock hinge (50), with a rotary bolt (13) moving in entry slot (12) and located in housing (11), with a lock pawl (14) holding rotary bolt (13) in locked position and placed in housing (11) and preferably with an electric drive (15) placed in housing (11) for lock pawl (14). This is first characterized in that housing (11) is completely closed externally except for entry slot (12) for the lock hinges and optionally entry fittings (23) for one or two Bowden cables (24; 25) and/or an entry fitting (26) for a lock cylinder. Further, it can also and independently be achieved that another drive motor be placed in housing (11) for motorized movement of rotary bolt (13) and that it be engaged with rotary bolt (13) even when the latter is in the locked position, and rotary bolt (13) is turned increasingly further in the locking direction as the motor vehicle speed increases.

Abstract: Latching components of a padlock are driven by a motor between latched and released positions. An encoder element with associated optical elements provides position information to a control circuit. The control circuit correlates the position information with the signal directing power to the motor so that the motor is precisely controlled for moving the latching elements between release and latch. If the motor jams (sensed by overcurrent), it is operated briefly in alternating directions to try and dislodge the grit or ice causing the jam. The padlock shackle is latched into place by balls which are driven into recesses in the shackle legs. The use of plural balls on at least one side helps isolate the drive motor and gears from grit that may enter through the padlock's top shackle holes.

Abstract: A Remote Controlled Door Lock System for securely retracting a locking bolt from engagement to a striker plate disposed in a door jamb. The inventive device includes a solenoid for retracting the lock bolt from engagement to the striker plate, a first microcontroller and associated circuitry for generating and transmitting a first signal representing an access code, receiving and decoding a second signal representing a random value and generating and transmitting a third signal representing a unique alteration of the random value, and a second microcontroller and associated circuitry for receiving and decoding the first and third signals, generating and transmitting the second signal and for generating a fourth signal operable to energize the solenoid.

Abstract: A door lock (1), preferably operable both by a mechanical key (C) with a key cylinder (60) and by an electronic signal and having inside and outside handles (A, B) mounted on inside and outside hollow spindles (10, 50), for mounting on a door having an inside face and an outside face, has a cylindrical lock chassis (80) with a provision for retracting a latch bolt (4) in response to rotation of either of the hollow spindles (10, 50); a member (40) for selectively locking the outside spindle (50) against rotation; a reversible electric motor (20) mounted coaxially within the inside spindle (10), the motor being secured against rotation but free to slide axially against resistance provided by a biasing member (21), and having a motor shaft (31) extending through the cylindrical lock chassis (80) to operably engage the member (40) for locking the outside spindle (50); a power supply (101) for the motor (20); and a mechanism (42, 45, 61) for selectively moving the member (40) between locked and unlocked positions

Abstract: An intelligent safe system. The safe system includes a safe including a housing and lockable door thereto, a central processing unit for controlling access to the safe by operating the lockable door, a card reader for reading access codes from an access card to control the lockable door, a sensor for detecting security violations, a modem for transmitting alarm signals from the CPU to indicate a security violation and for receiving external control data to lock or open the lockable door, and an audio alarm device for indicating security violations. The central processing unit may further includes a memory for storing the card numbers. A sensor may be coupled to the housing for detecting the locking an opening of the lockable door. A display may also be coupled to the housing for displaying acceptance of access codes. Further, the safe system also includes a sensor.

Abstract: An automotive vehicle electric door latch mechanism includes a striker, a catch, a pawl, a key actuatable lock cylinder lever, an electrically driven output gear, and a manually actuatable release lever. The catch has a striker receiving surface and a pawl engaging surface. The pawl has a pin projecting therefrom, a catch engaging surface, and a cam contacting surface, the pawl being pivotally movable from a biased, catch engaging position to a catch disengaging position. The key actuatable lock cylinder lever has a pin striking surface and is pivotally movable between a biased, neutral position and a pin striking, pawl pivoting, catch disengaging position. The electrically driven output gear has at least one cam that is electrically movable between a neutral position and a pawl contacting, pawl pivoting, catch disengaging position.

Abstract: A lock cylinder of standard size and configuration, interchangeable with conventional mechanical cylinders, includes electronic access control features as additional security or in some embodiments as the sole security feature. A microcontroller, memory, solenoid, battery, one wire bus connection and other electric and electronic elements are self contained within the cylinder, being positioned in the cylinder shell or the cylinder plug. The microprocessor can be programmed as to authorized users, entry times, etc. using a special programming key, which itself is programmed with a computer. User keys have a memory cell or ID chip which is read by the cylinder's microcontroller on insertion of the key; however, a system of locks can include locks which are mechanical/electronic, solely electronic and solely mechanical, and keys can also be electronic, mechanical or both.

Abstract: A safety closure for controlled access, that includes an inner and outer unit mounted on a door to drive a main bolt and a privacy bolt. The outer unit has an armored chassis with a primary tube of the actuating handle and carrying a secondary tube having a square axis that drives the main latch. A retractable tenon provides the connection between the primary and secondary tubes and a retractor treadle is in permanent contact with the retractable tenon and a rocker having elastic arms that drives the retractor treadle. A motorize actuator is activated by an electronic card reader. The motorized actuator or an emergency handle may actuate the rocker in opposite directions. The inner tube has first and second pushing tabs symmetrically arranged in mutual opposition whereby the pushing tabs act independently of each other in response to the direct or opposite turning of the inner actuating handle to actuate the privacy bolt. An emergency lock cylinder drives the emergency handle.

Abstract: A locking device for a container lid is provided, in particular for the lid of a storage compartment in a motor vehicle, with a spring-loaded closing cam which is arranged in a projecting manner at the free end of the lid and which, when the lid is closed, engages releasably in a latching recess of a latching recess housing arranged on the storage compartment, with a transducer element which is likewise arranged on the storage compartment and can be triggered via a central locking system with a view to locking and unlocking, and with a reversing linkage, mounted at one end on the transducer element and at the other end on the latching recess housing, for actuating a closing hook which can be pivoted into a latching opening of the closing cam.

Abstract: A digitally programmable protecting mechanism and a programmable key for a mechanical rotary lock for providing enhanced protection and enabling user to change mechanical and electronic security code configuration at any time without involving of special tools. The device includes a mechanical digitally configurable key where the protecting binary code configuration is formed by cylindrical binary coding members put on a central core of the key, and an electronic programmable digital module attached to a mechanical rotary lock for capturing the key code configuration, verifying, and releasing the lock if the verification proves that the key coding configuration and the electronic module coding are matched.

Abstract: A security briefcase is provided including an upper half and a lower half hingably coupled. Also included is a locking mechanism for unlocking the upper half and the lower half upon the receipt of an activation signal via free space. A portable unit is provided for transmitting the activation signal via free space upon the depression of a button.

Abstract: A switch for a door or window has inner and outer handles which are both axially fixed to withdraw the locking element of any type of lock. The switch has an actuating shaft which extends between the inner and outer handles for withdrawing the locking element. The actuating shaft has overall dimensions which represent the only dimensions allowing the switch to fit into the lock. An actuating element associated with the inner handle is used to selectively set at least two states of operation of the outer handle. A transmission element inwardly linked to the actuating element extends between the inner and outer handles at least in an area of the actuating shaft that extends through the lock and within the limits of its overall dimensions.

Abstract: A door lock comprises a driver hub connected to a door lever, a driven hub, a latch lever movable by the driven hub for retracting the lock's bolt to open the lock, and a catch mechanism for selectively connecting the driver hub to the driven hub. The catch mechanism includes an idle position in which the driver hub moves without moving the driven hub and an engaged position in which the driver hub moves the driven hub and thus the lever and the bolt. A state selection mechanism is provided to displace the catch mechanism between its idle and engaged positions. An actuating mechanism, e.g. a solenoid, selectively positions the state selection mechanism such that the latter causes the catch mechanism, when driven by the driver hub, to adopt one of its idle and engaged positions such that the catch mechanism respectively drives, or not, the driven hub.

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 transceiver with an antenna oscillating circuit generates a magnetic field which inductively charges a charge capacitor of a transponder through a transponder oscillating circuit. A frequency-modulated oscillation is thereupon generated in the transponder and that oscillation is transmitted back to the transceiver. In order to ensure that the transceiver will receive the highest possible amplitudes of the frequency-modulated oscillation, the resonant frequency of the antenna oscillating circuit is adapted to the oscillation frequencies of the transponder oscillating circuit. To that end, an impedance is connected, automatically weighted, to the antenna oscillating circuit.

Abstract: An electronic lock for use with lockers assigned for transitory or permanent use, has a keypad for entering a preselected sequence of digits. Programmable for each use in the transitory mode, the lock shifts a latch to locked position on a first entry of a sequence chosen by the user, and retracts the latch to unlocked position when the same sequence is reentered by the user. A subsequent user of the locker when unlocked can enter any sequence of digits desired. In the mode of a longer term assigned locker, the electronic lock is programmed by, for example, a student, and the same combination is retained as long as desired. In this mode, the selected sequence is used only to unlock, 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.

Abstract: A door lock system includes a door lock mechanism, and a connecting mechanism whereby the door lock mechanism and the door lock knob are connected to permit unlocking using the door lock knob, when the motion sensor detects movement inside the vehicle within a predetermined time after the door lock mechanism and the door lock knob are disconnected to prohibit unlocking using the door lock knob.

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 electromagnetically actuated lock is disclosed, which includes a lock bolt with a turnpin. An electromagnet is used as a retaining magnet, the electromagnet including a controlling and locking mechanism for locking or releasing the lock bolt. A control slide moves a control cam, a locking slide has a turnway, and a cross slide is coupled to the electromagnet with the locking slide. In a particularly preferred embodiment, a handling mechanism is used for actuating the lock bolt and for driving the control slide moving the control cam, the cross slide coupled to the electromagnet and the locking slide, so that the turnpin of the lock bolt immerses in the turnway of the locking slide. In an alternative, preferred embodiment, a tumbler lock mechanism is used, instead of the handling mechanism, and includes a double-bit key, so that both a key and a coded command are required for opening the lock.