Abstract: A `Eurocylinder` configuration for an electronic lock and key system has a plug fitted into a main body housing which is readily mounted into a mortise of standardized dimensions. The plug has a keyway at one end and a deadbolt-engaging cam at the other end. To operate the lock, an electronic key is inserted into the keyway and, when given permission as a result of an opto-electronic communication exchange between a control processor in the key and a control processor in the lock, the key is rotated so as to operate a deadbolt. A spring biased translatable contact serves as a conductive interface between a flex circuit and a contact on the keyblade. The body also includes a solenoid device which is energized by way of the flex circuit. The solenoid device operates a plunger away from the plug to allow rotation of the plug by the key. The body and plug also include a segmented pin arrangement such that when the key and the plug are rotated from a key insertion position, the key cannot be removed.

Abstract: An erasable circuit provides a nonvolatile memory for holding key codes in at least two memory locations. At least one of these locations is a master key code address. "Master key" here means a key that can command a lock to store a key code or to erase a stored key code. An input device makes electrical connection to an electronic key--such as a ROM key--to receive from the key an electronic code that is in essence unique to that key. The lock also has provision for comparing such a received code with the contents of each of the address locations, and it responds to the comparison by performing a lock-management function. Such functions include opening or closing a lock, changing the state of a key switch, rejecting a key, and validating or invalidating a key--particularly including a master key--by physically changing the contents of the nonvolatile memory. Perceptible signals identify the lock-management function for human users.

Abstract: An electronic fuel injection control system having a plurality of fuel injection valves, wherein each valve is operated by an electromagnetic solenoid. The control system includes at least one driver circuit for supplying current limited power to the solenoid, at least one control circuit for controlling the current passing through the solenoid, and a multiplexing means for selectively interconnecting the at least one driver circuit and the at least one control circuit to the terminals of a selected solenoid for selectively energizing the solenoid. The multiplexing means includes two switch arrays. The first switch array has at least one switch that selectively interconnects at least one driver circuit to a first terminal of the solenoids. The second switch array has at least one switch selectively interconnecting at least one control circuit to a second terminal of the solenoids.

Abstract: A latching relay control circuit comprising a latching relay pulse generator circuit and a relay coil drive circuit, the latching relay pulse generator circuit receiving relay control signals and relay reset signals. When a relay control signal changes states, the latching relay pulse generator provides a pulsed signal to the relay and coil drive circuit, the relay and coil drive circuit then changing the state of a latching relay. The relay reset signal is provided during power-up or just before power is lost to the system, the relay reset signal being provided to the latching relay pulse generator circuit wherein the latching relay pulse generator circuit provides a reset signal to the relay and coil driver circuit, and the relay and coil driver circuit opens all of the latching relays it controls.

Abstract: One or more loads, commonly solenoids, requiring a high-power drive--typically 500 ma. 7.5 v.d.c.--are selectively actuated by energy that is accumulated over time--typically over several hundred milliseconds--within associated, addressable, energy-accumulating high-power drivers. The energy accumulation is solely from micropowered signals--typically 1 ma., 4.5 v.d.c.--that are received from a control system that is itself micropowered--typically from a high-equivalent-series-resistance power source. The energy-accumulating high-power solenoid drivers (i) accumulate predetermined amounts of energy only as, when, and to such extent as is required, (ii) multiply the voltage (nominally times two) of the received micropowered signals, and (iii) shape the current waveform of the output high-power solenoid drive signals--all as desired so as to optimally both use and conserve energy.

Abstract: A group of cabinets or other units each have a solenoid operated lock controlled by an electronic lock accessible by one or more electronic keys. The locks are linked together in a chain by power and data lines so that power is supplied through a single 12 volt transformer, and key codes are transmitted from a lock that reads a key to other locks, to open any cabinet programmed with an access code matching the transmitted key code. To limit power requirements, when one solenoid is being energized a busy signal is transmitted to prevent concurrent operation of other solenoids. A user installed master code stored in the lock and a corresponding master key are used to permit programming or erasing of other access key codes. A factory installed permanent reset code is stored in the lock and a secret algorithm known only to the manufacturer can derive the reset code from the cabinet serial number.

Abstract: A battery-less electronic cylinder lock comprises an electromagnet or other electrical release mechanism controlled by an electronic circuit. A cooperating key comprises a battery and a code producing circuit. When the key is inserted in the lock, power for the lock is supplied from the battery to the electronic circuit and the electromagnet by means of a transformer coupling arrangement with a primary portion in the key and a secondary portion in the lock. Alternatively, power may be supplied via electrical contacts on the key and on the lock.

Abstract: A group of cabinets or other units each have a solenoid operated lock controlled by an electronic lock accessible by one or more electronic keys. The locks are linked together in a chain by power and data lines so that power is supplied through a single 12 volt transformer, and key codes are transmitted from a lock that reads a key to other locks, to open any cabinet programmed with an access code matching the transmitted key code. To limit power requirements, when one solenoid is being energized a busy signal is transmitted to prevent concurrent operation of other solenoids. A user installed master code stored in the lock and a corresponding master key are used to permit programming or erasing of other access key codes. A factory installed permanent reset code is stored in the lock and a secret algorithm known only to the manufacturer can derive the reset code from the cabinet serial number.

Abstract: An electronic key and lock system, particularly useful for solenoid-operated locks employs a key that can operate electronically and mechanically. The key is mechanically polarized with its blade forming a first electrical contact and a separate second contact which is flush or raised relative to the blade. Each of the key and the cylinder employs respective light emitting and light receiving IR devices for communications between the electronics in the key and communications within the lock. The lock includes a solenoid-operated electronic cylinder.

Abstract: A passive keyless entry system is disclosed that is specifically adapted for use with automotive vehicles. The system is designed to automatically unlock the vehicle as the operator approaches the vehicle. The system is further designed to automatically lock the vehicle as the operator, carrying the beacon, moves away from the vehicle. The system includes a portable beacon that is carried by the operator, a receiver/controller located in the vehicle, and an antenna connected to the receiver/controller for receiving the encoded transmission from the beacon. The beacon includes a motion sensor to conserve battery life when the beacon is stationary. Transmission between the beacon and the receiver/controller is characterized by a magnetically coupled radio frequency signal embodying differential phase encoded data with error correction coding of the data to enhance noise immunity and signal discrimination.

Abstract: An object of this invention is to provide a door unlocking device adapted unlock a door by transmitting a signal in the air through a signal transmitter, which can unlock the door even when the power source of the signal transmitter, namely, the battery has consumed up. With a door unlocking device, upon insertion of an ignition key into the rotor of a key cylinder, a shutter is opened to operate a shutter switch. Under this condition, the rotor is turned in opposite directions from the neutral position according to a predetermined rotor turning pattern. The rotor turning pattern is discriminated by a rotor-turning-pattern discriminating circuit. Ensuring that the rotor turning pattern is the one predetermined for unlocking the door, the rotor-turning-pattern discriminating circuit activates an electric operating mechanism to cause a lock mechanism to unlock the door.

Abstract: A refrigerator controller which can positively lock and unlock a door thereof in accordance with a command signal from a host-computer connected therewith. The refrigerator controller includes a power supply voltage indicating device. A DC power supply is charged by a DC power source and energizes a door lock mechanism activating device to lock and unlock the door. DC voltage generated by the DC power supply rises as it is charged by the DC power source. The door lock mechanism activating device can be energized to positively lock and unlock the door by being fed with a predetermined lower limit voltage. Only when the DC voltage generated by the DC power supply is no lower than the predetermined lower limit voltage is the door lock mechanism activating device energized by the DC power supply to lock and unlock the door of the refrigerator in accordance with the command signal.

Abstract: A secure, keyless secondary transmitter unit for use in an automatic garage door operator transmits a code set by a code setting device as modified by digits entered at a keyboard. A controller constructs an identification code by inverting bits of the code set by the code setting device that correspond to entered digits. A radio frequency transmitter transmits this altered code in the manner of known automatic garage door operators. Thus operation of keys corresponding to the bits that differ between the receiver code and the secondary transmitter code controls the door. The keyboard preferably also includes an entry complete key indicating entry of the complete digit sequence and a clear key to restart the digit sequence. A lamp connected to the controller illuminates the keyboard upon operation of any key at the keyboard and is turned off if no key is operated in a predetermined period of time.

Abstract: An electric locker apparatus to be installed at a public space, such as entrance hall of a condominium, includes a plurality of locker boxes of at least one type, each having a door with an electric lock device, and a sensor for detecting whether the relevant locker box is occupied by an article or empty. An improved locker box designating device serves to automatically designate an empty locker box of a desired type such that any one of the locker boxes of a same type, after it has been once used, can be designated only after subsequent one-round use of all remaining locker boxes of the same type. The lock device of the designated locker box is actuated to unlock the door, for allowing an article to be accommodated in the locker box. All the locker boxes of a same type are thus put into use with as uniform a frequency as possible.

Abstract: A coded anti-theft system of the present invention employs a keyswitch board, a number of relays and timers, and a number of peripherals including a first sensing device, a second sensing device, a starting device, an indicating device, and an alarming device. Aggressive activity is sensed by the sensing devices to sound the alarming device. The system is set with a code by a user, and only the user who enters the correct code can enable the starting device to start the vehicle.

Abstract: A power controller for electric locks which draw large startup current surges which controls and manages the energy of a pair of storage batteries to reliably operate such electric locks and provide steady-state power to auxiliary system components both with AC power present and in the absence thereof, so long as the stored charge in the batteries is able, to thereafter maintain a steady source of power to the system as long as possible, and to be self-starting upon the return of AC power, all without ever placing the electric locks in a partially unlocked or "hung" state. The two storage batteries are normally maintained charged through an AC power source, and both cooperate to provide the surge power. On loss of AC power, both still provide surge power so long as one can maintain the steady state power, and thereafter the other battery alone provides surge power so long as possible.

Abstract: A container, e.g., case or bag, has an internal compartment with an access opening that is entirely closed with a cover having a clasp that cooperates with a latch of an electronic lock carried on the container. Preferably, the cover carries a key pad on its external surface and the key pad is in circuit to an alarm system that includes a control unit, power supply, motion and/or shock detector, and an audible alarm such as a siren. Most preferably, the power supply comprises one and preferably a pair of panels of solar cells which are also located on an external surface of the top cover. The container has one or more handles which can include a shoulder carrying strap. Preferably the container is formed of a thermally insulating material so that the container also serves as a cooler for beverage cans and the like.

Abstract: A security system which employs an optical key shape reader to photoelectrically derive an electrical signal from a shape characteristic of a key is disclosed. The system provides heightened security over standard key operated systems and is particularly well suited for use in motor vehicles.

Abstract: The present invention relates to an integrated outlet that allows supply of AC power to an outlet receptacle when certain conditions are satisfied. The integrated outlet contains separate modules to establish electrical connection with electrical conductors that transmit AC and DC power, telecommunications, control communications, and signals transmitted along a coaxial wire. In a preferred embodiment, these electrical conductors are disposed on two cables. Each module within the integrated outlet attaches to only certain standard conductors in each of the two cables. The integrated outlet can then be efficiently connected to the conductors in each of the two cables.

Abstract: A wireless remote control high security system permits the opening or theft-proof closing of relay actuating systems such as locks. The system comprises an assembly of remote control security keys and locks in which the key has the sole function of emission and the lock the sole function of reception in connection with the function of absolute security of opening or closing locks.

Abstract: An accessory for use with a vehicle, equipped with a vehicle anti-theft system, and an interrogator device for the anti-theft system. The accessory includes a connector arrangement for establishing between the vehicle anti-theft system and the interrogator device an electrical current carrying path which passes through the vehicle ignition lock cylinder mechanism. An ignition key arrangement is provided which is cooperable with the connected arrangement and permits mechanical operation of the vehicle ignition switch mechanism while the electrical current carrying path remains established.

Abstract: A battery-powered security device for controlling access through a door by authorized uses which includes a lock operated by a low power driven motor; a keyboard by which a user enters codes or programming; a programmable circuit including a microprocessor, data memory and program memory. The device opens the lock in response to a correct code entered through the keyboard and/or to a chronological schedule enabled by a clock marking real time. An LED provides a wireless link to a hand-held printer so that the device may be programmed with access codes and time schedules and prints out a list of users and times of entry. The operative programs in memory can be added or modified by means of the keyboard. The coupling between the motor shaft and key plunger is designed to avoid accidental misuse such as a user holding the door handle while the motor is turning.

Abstract: A keyless entry system for providing controlled access is provided. This system includes a portable transmitter carried by an authorized person and a control system for controlling a locking mechanism. When locking or unlocking, the portable transmitter outputs an input signal to the control system. Upon receiving the input signal, the control system generates a request code signal for output to the portable transmitter. The request code signal generally includes a sequence of random code and an identification code. The control system further generates a particular code signal into which the random code is converted according to information indicated by a specific code stored in the control system. Simultaneously, in the portable transmitter, the random code is converted in the same manner by a user particular code signal equal to the particular code and is transmitted to the control system.

Abstract: An electronic locking system comprises a conventional mechanical lock and a key associated therewith, said key having a built-in code transmitter and receiver, preferably an infrared sensitive photo-detector which cooperates with the code transmitter. The receiver is connected to an electronic control unit which is arranged to register a coded signal emitted from the key and transmitted to the receiver. When the signal is acceptable the electronic control unit is activated. The electronic control unit is provided with a memory element contains no information on any coded signal. After transmission of the coded signal of the associated key the coded signal is stored permanently in the memory element whereafter the electronic control unit will accept only precisely this coded signal in order to be activated.

Abstract: The disclosure describes a security system for motor driven vehicles and motor operated plants which uses a micro-chip that is mounted inside vital motor accessories and prevents these accessories from operating without the entry of a 4-digit code word. The micro-chip consists of a silicon substrate and an added semiconductor-switch that adapts the micro-chip to the various switching requirements of the various types of motor accessories. The silicon substrate carries all circuitry for data entry, data storage, conparison, evaluation and control functions and is designed to store data without power. Special circuits are provided to adapt the unit to a number of service requirements, such as maintenance, automatic code entry, and erasure of forgotten codes.

Abstract: An electronics lockout circuit including an antenna adapted to receive ra frequency signals from a transmitter, and a radio frequency detector circuit which converts the radio frequency signals into a first direct current voltage indicative of the relative strength of the field resulting from the radio frequency signals. The first direct current voltage is supplied to a trigger circuit which compares this direct current voltage to an adjustable direct current reference voltage and provides a second direct current voltage at the output thereof whenever the amplitude of the first direct current voltage exceeds the amplitude of the reference voltage. The second direct current voltage provided by the comparator circuit is supplied to a disconnect relay circuit which upon receiving a signal from the electronic control unit of an electronic combination lock during the time period the second direct current voltage is present isolates the door strike coil of a security door from the electronic control unit.

Abstract: An electronic lock security system includes a coded key and a multiple position key receiver switch having a code sensing circuit for generating signals indicative of the key's code. A decoder compares the key's code to a preset code and when a match is determined outputs a control code to a switch control circuit. A switch control circuit includes flip-flops for remembering when switch positions intermediate the off and last positions have been accessed and output control signals upon receipt of the decoder's control signal. The flip-flop outputs are consecutively ANDed together down to the last position to permit operation of a power switch to provide working power to a solenoid operated device only when all positions of the multiple key receiver have been accessed during operation.

Abstract: A keyless entry system employs a pocket-portable radio signal transmitter to be carried by a user and a controller mounted on a vehicle and associated with a vehicle device, such as a door lock mechanism, a trunk lid opener, a window regulator, a steering lock device and so forth, to be operated. Radio signal communication between the transmitter and the controller is performed by electromagnetic induction. According to the present invention, electromagnetic induction is caused between antennas in the transmitter and the controller. In order to provide wide communication area, at least the antenna of the controller serves as a transformer to generate higher loop current for generating sufficiently strong magnetic field therearound.

Abstract: An electronic door locking apparatus includes a key containing a first memory for storing a first code, and an electronic lock having a receptacle for receiving and reading the first code, a locking mechanism actuatable to a locking or unlocking condition, and a control system for controlling the locking mechanism in response to the insertion of a key into the receptacle. The control system includes a second memory for storing a second code, detectors for detecting whether the door is open or closed, a New-Code control member actuatable by the user when a new code is to be generated, and a Copy-Code control member actuable by the user when the code in the control system is to be copied into the memory of another key inserted into the receptacle.

Abstract: Electronic door lock system for use with a door mounted in a door frame and has a dead bolt and a latch mounted on the door. A control unit is mounted on the door in the vicinity of the dead bolt and the latch and includes a battery and electronic circuitry connected to the battery and manually operable contacts for selectively operating the dead bolt and the latch so that they can be moved to unlatched positions under the control of first and second hand-operated members.

Abstract: An electronic key which responds to different sets of valid commands over its lifetime, depending on the state of certain circuits within the electronic key.(1) After initial fabrication of the electronic key, the electronic key recognizes a first set of valid commands and ignores all other commands.(2) After the electronic key is tested and a countdown circuit within the electronic key has been calibrated, a fusing element inside the electronic key is blown. This reduces the number of valid commands recognizable by the electronic key. Thus, the key is now restricted to a second set of valid commands.(3) The electronic key is then shipped to an OEM, who programs data into the key and also programs the length of time of the countdown timer. The OEM then sets an R-S flip-flop in the electronic key, which causes certain of the second set of commands to be ignored. Thus, the key will now respond only to a third set of valid commands.(4) The electronic key is then shipped to an end user.

Abstract: A passive keyless entry system is disclosed that is specifically adapted for use with automotive vehicles. The system is designed to automatically unlock the vehicle as the operator approaches the vehicle. The system is further designed to automatically lock the vehicle as the operator, carrying the beacon, moves away from the vehicle. The system includes a portable beacon that is carried by the operator, a receiver/controller located in the vehicle, and an antenna connected to the receiver/controller for receiving the encoded transmission from the beacon. The beacon includes a motion sensor to conserve battery life when the beacon is stationary. Transmission between the beacon and the receiver/controller is characterized by a magnetically coupled radio frequency signal embodying differential phase encoded data with error correction coding of the data to enhance noise immunity and signal discrimination.

Abstract: A device for use with security systems for residential or commercial buildings is disclosed which prevents an entrance door to the building both from being locked without first activating the security system, and from being unlocked without first deactivating the security system. The system uses an electromechanical interlock to prevent a deadbolt from being moved from an unlocked position to a locked position until the security system is armed. The eletromechanical interlock also prevents the deadbolt from being moved from the locked position to the unlocked position until the security system is disarmed.

Abstract: A security system for bicycles, ski racks and coat racks which includes a control in which a user can place a specific code for the specific lock which is to be used after which a free end of the cable can be passed through the device to be secured such as a bicycle, coat or a pair of skis and then inserted into the receptacle which locks. The security system includes an alarm when the cable carries either an electrical, a fibre optic or a pneumatic line such that if the cable is severed by a thief that an alarm system will instantly be actuated so as to prevent the theft. The user can release the cable by entering the known code when the article is to be removed which allows the one end of the cable to be unlocked from its holding socket.

Abstract: To prevent fraudulent action by ill-intentioned users, the detection of the secret codes, contained in a memory card with MOS integrated circuit and transmitted to an input/output unit, is prevented. This is done by interposing a read amplifier in the transmission chain, in the integrated circuit itself. This read amplifier essentially has two parallel-connected identical circuits, designed to take complementary logic states when they receive one and the same logic level to be detected. The result of this is that the electrical comsumption of the amplifier is the same regardless of the logic level transmitted. Thus, it becomes impossible to deduce the nature of the logic level transmitted. As an improvement, the outputs of the detector are provided with bistable circuits which are coupled to each other so as to be capable of taking transitory or spurious information detected into account.

Abstract: An electronic key for an electronic lock system is provided with graphical user interface which can display a plurality of symbols corresponding to a plurality of functions that the key can cause the lock to execute. An operator of the key moves a visual indicia among these symbols to select a desired function. The key then transmits instructions to the lock causing the selected function to be executed.

Abstract: A musical electronic lock 10 is provided to unlock a locking means 12. The musical electronic lock 10 comprises a digital tone generation circuit 20 and memory 18 for electronically producing a musical melody while an electronic logic circuit 16 decodes responses from a user. Responses are compared by the electronic logic circuit 16 with an electronically stored combination and timing information in the memory 18. When successfully operated, the user will activate a switch or switches 24 in a key input unit 14 to input a confidential alphameric code when prompted by particular notes of an electronically synthesized musical melody or other sequenc of audible tones generated by a speaker 22. The necessary information to operate the musical electronic lock 10 is significantly more difficult to disseminate than conventional combinations yet it is is far simpler to operate, due to the easy to remember musical melody.

Abstract: A combination lock is provided with an additional security lock wherein an electrically operable solenoid, having an armature post normally biased outwardly of a solenoid body is mounted to the combination lock housing so as to position the armature post normally to block movement of either the combination lock bolt or the bolt release lever associated with the bolt. An electrical signal generator which may be an electrical switch, electronic lock mechanism or other electrical signal generating means, is provided for selectively operating the solenoid to retract the post from a bolt and/or bolt release lever blocking position to thereafter allow operation of the combination lock in an otherwise standard mechanical manipulation or electronic digital input of the main combination lock.

Abstract: An electronic keylock system comprises a key which includes a precision resistance, a receiver for receiving the key, an analog-to-digital converter coupled to the receiver for measuring the resistance of the precision resistance of the key, circuitry for controlling the analog-to-digital converter, decoding logic for receiving data from the analog-to-digital converter and decrypting the data to provide information with respect to the type of key applied to the receiver, and circuitry for controlling the decoding logic. Two system embodiments are disclosed, one of which employs separate components, and the other of which employs a microcontroller combining several functions.

Abstract: The device can be applied to vehicles provided with an electronic control device for the vehicle engine. The protecting device for includes a keyboard for entering a user's code, a microprocessor for converting entered data coming from the keyboard into an output message containing the user's code, programmable and non-volatile memory for storing the code for unlocking the engine electronic control device, a microprocessor for comparing the unlocking code stored in the memory with the user's code contained in said message coming from the keyboard and unlocking the engine electronic control device when there is coincidence of the code contained in the memory with that contained in said output message, and the microprocessor and the memory being capable of effecting replacement of the unlocking code of the engine control device with a new unlocking code through action on the keyboard.

Abstract: A remote control system which includes (a) a receiver unit adapted to be fixedly mounted on a motor vehicle having at least one door lock with a first locked condition and a second unlocked condition and having means for receiving a coded signal including a code portion of binary bits, memory means for storing a first code of binary bits, means for comparing the code portion of a received coded signal with the first code and means for shifting the controlled device to one of the conditions upon the comparison match between the code portion of a received signal and the stored first code and (b) a transmitting unit for transmitting the stored second code of binary bits when the door lock is to be shifted into one of its conditions.

Abstract: An electronic key which responds to different sets of valid commands over its lifetime, depending on the state of certain circuits within the electronic key,(1) After initial fabrication of the electronic key, the electronic key recognizes a first set of valid commands and ignores all other commands,(2) After the electronic key is tested and a countdown circuit within the electronic key has been calibrated, a fusing element inside the electronic key is blown. This reduces the number of valid commands recognizable by the electronic key. Thus, the key is now restricted to a second set of valid commands,(3) The electronic key is then shipped to an OEM, who programs data into the key and also programs the length of time of the countdown timer. The OEM then sets an R-S flip-flop in the electronic key, which causes certain of the second set of commands to be ignored. Thus, the key will now respond only to a third set of valid commands,(4) The electronic key is then shipped to an end user.

Abstract: There is provided an automatic door lock control device on a vehicle which includes a first switch operable by a driver, a second switch operable by an occupant other than the driver, and an automatic control device. The automatic control device issues a control command for simultaneous operation of the door lock operation mechanisms associated with the driver and the other occupant upon receipt of a signal from the first switch, and issues a control command for operation of the door lock operation mechanism associated with the other occupant upon receipt of a signal from the second switch. The automatic control device is provided with a predominance determination unit which gives priority to the signal from the first switch over the signal from the second switch to avoid conflicting commands to the door lock operation mechanisms.

Abstract: An electronic security device has at least one lock and a control center for generating keys to the lock. When a new key is generated, a new (second) combination is generated by applying a predetermined algorithm and randomly generated (first) calculation data to the previous (first) combination. To calculate a next new (third) combination, another randomly generated (second) calculation data is applied to the second combination using the same algorithm. The control center stores, on the key, the third combination, and the second calculation data used to obtain it and the first calculation data used to obtain the second combination. At the lock, the third combination is compared with a stored combination and if there is no match, the lock calculates a possible second combination by applying an algorithm, which is the inverse of the predetermined algorithm, to the stored combination using the second calculation data read from the key.

Abstract: A security system which employs an optical key shaped reader to photoelectrically derive an electrical signal from a shape characteristic of a key is disclosed. The system provides heightened security over standard key operated systems and is particularly well suited for use in motor vehicles.

Abstract: A vehicular anti-theft system which combines a mechanical key and an electronic key involving a code light signal. A light emitting element is provided in a casing attached to a base end of the shank of the mechanical key while a light receiving element is provided adjacent to an open end of the key hole so that the conventional action of fitting the key shank into the key hole causes the transmission of a code light signal between these elements. Advantageously, the light emitting element can be additionally equipped with the function of locking and unlocking a vehicle door so that the user can obtain the benefits of both a remote control entry system and a highly effective anti-theft engine start system.

Abstract: An identification system, consisting of at least one stationary element and at least one movable element or token, the first element having a first induction coil adapted to generate a magnetic alternating field and being connected to a source of alternating current, and to a detector for detecting variations of the electromagnetic field, the detector being adapted to compare the detected patterns, the second element having a second induction coil adapted to pick up the field of the first coil and being connected to a rectifier circuit adapted to rectify the induction voltage of the second coil, a capacitive storage device being provided for smoothing the rectified voltage, a control circuit being fed by the rectified voltage and receiving, at an input terminal, the ac voltage induced in the second coil, the control circuit having an encoding deive adapted to produce, at an output terminal, code signals identifying the second element, these code signals being used for actuating a switch which, in one conditio

Abstract: An anti-theft ski alarm has a generally rectangular housing having a flat bottom surface provided with a slot. A peg having an enlarged head portion adapted to be received within the slot is secured to the upper surface of a ski to be protected. The enlarged head of the peg is inserted into the slot and an arming switch of the device is actuated, which causes a latch to block removal of the peg from the slot. A spring biased solenoid rod operates to block opening of the latch unless a code is correctly entered on a keypad. When the correct code is entered, a relay energizes the solenoid to retract the solenoid rod allowing the latch to be moved to an open position. An audible alarm within the device is actuated by a vibration switch which detects movement of the skis. The keypad includes a plurality of "dummy" keys to prevent breaking of the code sequence.

Abstract: A security device for credit cards, charge cards, cash cards and the like has a base, an integrally molded top partially extending along the length of the base and a lid pivotally secured to one end of the base. A key pad is recessed into the top. The lid has an electrically operated latch operated by the key pad. A cartridge for the cards is formed of cardboard bent into a serpentine format to provide an upper compartment and a lower compartment, each compartment being suitable for holding up to four cards each. The internal surfaces of the cartridge are coated with a pyrotechnic material and a heating coil is connected to the cartridge. An authorized user of the device has a personal code which when inputted via the key pad opens the lid. Incorrect input of the code causes a piezoelectric bleeper to sound. Two incorrect input sequences are permitted but on the third incorrect sequence the coil causes the pyrotechnic solution on the cartridge to heat up and destroy the cards within the device.

Abstract: A security system includes a microcomputer with an auxiliary read-only memory and a key device including a similar read-only memory, each of the read-only memories containing corresponding pluralities of corresponding binary combination codes. Under the control of the microcomputer the codes are read and compared. If the combination and the sequence do not compare, the system will not unlock and an alarm will be generated. The read-only memories are of the programmable type, so that changes in the combinations and sequences can be accomplished easily. A plurality of visual indicators and an audible alarm provide the user and personnel in the secure area with information concerning the status of the system.