Abstract: An optical anti-theft system incorporates a member having a plurality of reflective surfaces. The plurality forms a pattern corresponding with the security code. The system additionally incorporates a base for receiving the member. The base incorporates a light source for generating a light beam to illuminate the plurality of reflective surfaces, and a light detector for sensing the illuminated plurality of reflective surfaces and for initiating a security function in response to the sensed illuminated plurality of reflective surfaces having the pattern.

Abstract: A method for Voltage Stability Analysis of a bulk power supply system is taught. Briefly stated, a computationally efficient method is disclosed which is appropriate for low and high voltage applications as well as differing types of loads and load changes, i.e. reactive or otherwise, and which is usable with a multitude of different bulk power supply system systems. More particularly, a nose point of a curve for which MVAr, MW or MVA distances to voltage are calculated, using a generalized curve fit in order to compute an equivalent or surrogate nose point. This is done by approximating a stable branch and creating a voltage versus power curve, determining a plurality of stable equilibrium points on the curve, using the plurality of determined stable equilibrium points to create and fit an approximate stable branch, calculating an approximate voltage collapse point and thereafter a voltage collapse index.

Abstract: A vehicular automatic occupant sensing anti-carjacking system primarily designed to automatically and continuously protect a vehicle from carjacking and to provide preventive protection to the authorized occupant of the vehicle from being taken hostage in their own vehicle and to facilitate the recovery of a vehicle during a carjacking regardless, whether the vehicle is occupied or unoccupied, regardless, whether the vehicle is attended or unattended, regardless, whether the ignition is on or off and regardless, whether the engine is running or not running. The system includes an electronic Command Control Unit which communicates with a plurality of sensors to provide the necessary input signals to the command control unit. The system has a means for automatically monitoring and determining the occupancy status of the vehicle via pre-programed occupancy status instructions.

Abstract: A vehicle theft prevention and recovery system is activated by a pager upon receiving a telephonic signal from a pager service, in response to a call from a vehicle owner or operator, to activate anti-theft means including a warning to a thief in the vehicle, means for disabling the vehicle engine, and visual and audible alarm signal devices to identify the vehicle as stolen.

Abstract: An electronic theft deterrent system for deterring theft of an electronic device, such as a radio associated with a vehicle, that takes advantage of already existing device parameters, controls and displays associated with the device. When used as a theft deterrent system for the vehicle radio, a radio operator will first activate a frequency control switch in order to set an arbitrary frequency in the display of the radio. Next, a predetermined set of theft key radio control buttons are activated for a predetermined time in order to cause the arbitrary frequency that is displayed to be stored in a non-volatile memory. When the frequency is stored, the radio volume is impaired, but the total operation of the radio is not disabled. When the operator wishes to restore the radio to its normal operating condition, the operator will reset the arbitrary frequency, and reactivate the theft key control buttons.

Abstract: A vehicle security system includes a controller in the vehicle for generating a plurality of security system condition signals. A local indicator generates a plurality of local security system condition indications adjacent the vehicle based upon respective security system condition signals from the controller. A local transmitter generates transmitted signals based upon respective security system condition signals from the controller. A remote unit or indicator is adapted to be carried by a user when away from the vehicle for receiving the transmitted signals from the local transmitter and for generating a plurality of remote security system indications emulating the local security system condition indications generated by the local indicator. In other terms, the remote indicator means mimics or emulates the indications given at the vehicle by the local indicator means.

Abstract: An anti-hijack security system which automatically protects the vehicle with anti-hijack after the ignition has been turned off for a predetermined long period of time or after the ignition has been turned off and a door has been opened and closed for a predetermined short period of time. Thus, ensuring the owner to have anti-hijack protection when he returns to his vehicle. The anti-hijack protection system also makes sure that, once triggered, it will perform the anti-hijack trigger sequence even if a door sensing device is damaged or if a door is not closed properly. The system also makes sure that once anti-hijack trigger sequence is in it's last few stages, it cannot be disarmed by simply pressing the arm/disarm switch but can only be disarmed by entering a security code.

Abstract: An anti-theft car protection device includes a key having an IC-chip embedded therein, and an ignition switch that can be turned by the key to any "OFF" position, an "ACC" position and an "ON" position. The device further includes an antenna mounted near the ignition switch, and a communication module that provides a radio communication between the IC-chip of the key and the antenna. The device also includes an immobilizer controller that determines, in accordance with an instruction signal issued from the communication module, whether or not the engine should be started. The communication module includes an electric field generating circuit that energizes the IC-chip of the key by causing the antenna to emit an electromagnetic wave, a transmitting/receiving circuit that carries out exchange of ID-codes with the IC-chip through the antenna, and a system control circuit that controls both the electric field generating circuit and the transmitting/receiving circuit.

Abstract: A vehicle security system includes a controller for performing a function responsive to receipt of a corresponding command signal, and a remote transmitter for sending a command signal from a plurality of banks of command signals. More particularly, the remote transmitter includes a plurality of first momentary contact switches for transmitting a first respective command signal responsive to depressing the switch for less than a first time and for transmitting a second respective command signal responsive to depressing the switch for more than the first time. The remote transmitter also includes a bank selector switch for selecting one of the plurality of banks of command signals. A valet switch is included for placing the controller in a valet mode, such as to permit a service technician or valet to use the vehicle without triggering an alarm.

Abstract: A device for controlling keyless access to a motor vehicle includes a transceiver to be carried by a user. A distance detecting device measures a distance between the transceiver and a motor vehicle. A transmitting unit being disposed in the motor vehicle and being associated with a tripping device broadcasts a question code signal when the tripping device is actuated. The transceiver has a receiver for receiving the question code signal, and the transceiver has a transmitter for broadcasting an answer code signal only whenever the motor vehicle is located in the immediate vicinity of the transceiver. A receiving unit disposed in the motor vehicle receives the answer code signal from the transceiver and furnishes an unlocking signal to an unlocking unit if the answer code signal matches a set-point code signal.

Abstract: A vehicle security system includes a vehicle security sensor and associated sensor bus interface, an alarm indicator and associated alarm indicator bus interface, and an alarm controller and associated alarm controller bus interface for interfacing the alarm controller. The vehicle security system is for a vehicle of a type including a data communications bus connecting a plurality of vehicle devices. The security system preferably further includes a desired signal enabling circuit for enabling the alarm controller to operate using a set of desired signals for a desired vehicle from among a plurality of possible sets of signals for different vehicles. Accordingly, the desired signal enabling circuit permits the alarm controller to communicate with the vehicle security sensor and the alarm indicator via the data communications bus so that the alarm controller is capable of operating the alarm indicator responsive to the vehicle security sensor.

Abstract: An arrangement for identifying a movable object includes a transponder disposed on the movable object and including an electrical memory that can be read out in a wireless manner by an electrical interrogating device which is disposes in proximity of the object. A sensor arrangement is disposed on the object and electrically linked to the transponder for writing a read-out-capable status information into the memory in response to irregular or unauthorized use of the object.

Abstract: An anti-theft device for a vehicle includes a control configuration having a first terminal for outputting a lock signal and a second terminal for outputting an unlock signal. The device also includes a push-pull gear motor having a first terminal connected to the first terminal of the control configuration and a second terminal connected to the second terminal of the control configuration. The motor has an actuator movable between an extended and a retracted position upon receiving the signals. The anti-theft device further includes a pivotal locking device connected to the actuator. The pivotal locking device is in a locked position when the actuator is in one of the positions and is in an unlocked position when the actuator is in the other of the positions. The locking device engages a first end of an operative connection when the locking device is in the locked position.

Abstract: A method of resetting a central lock system of a motor vehicle automobile connects a diagnostic device to a fixed part of the system. When the central unit is switched to the "SETUP" mode, the key of a new portable unit is inserted into a key-operated switch to interrogate a transponder of the portable unit, a transponder querying transceiver of the fixed unit to derive a key-identification code word which is stored in the transponder and in a memory of the transceiver. The transmitter is then operated to send a remote-control changing code word which progressively changes in the transmitter, to the receiver. The latter picks up the then-effective remote-control changing code word and stores it in the transceiver and transponder code word storage memories as a new transponder changing code word. The fixed unit is then switched back to its "NORMAL" mode.

Abstract: The invention provides a device for protection against unauthorized use of a motor vehicle, in which usage authorization information is transmitted electromagnetically, at preset time intervals, by a transmitter in a predetermined vehicle usage area. A usage control device aboard a vehicle keeps an operational critical vehicle assembly or assemblies that are operationally essential in operational readiness after a usage signal is received for only a predetermined subsequent period of time, and blocks further operation if further usage signals are not received within the predetermined time period.

Abstract: A vehicle safety automatic braking apparatus having a driver seat weight sensor, a velocity sensor, an emergency brake actuator, and an engine kill switch which are interfaced with a controlling microprocessor. A microprocessor monitors the weight sensor and velocity sensor and, upon detection of the weight in the driver's seat falling outside a predetermined range and the speed of the vehicle being below a predetermined threshold, the emergency brake actuator and engine kill switch are activated to arrest motion of the vehicle.

Abstract: An anti-theft car protection system comprises a transmitter-receiver for receiving a code of the key, an immobilizer unit for collating said code as received with a code as registered and transmitting an engine start permission signal to an engine control unit when said code as received coincides with said code as registered, and means, cooperating with said immobilizer unit, for removing repetition of key operation upon start of the engine.

Abstract: An anti-theft device for electronic equipment mounted in a vehicle, such as audio systems, includes a housing for storing electronic component of the audio system and a detachable control panel that can be removed when the operator leaves the vehicle. A replacement detachable panel can be mounted on the housing to enable a locking of the housing to the vehicle dashboard. The second detachable panel can include an alarm, an ultrasonic sensing device, and a self-contained power source so that a security alarm system can be activated by the installation of the second detachable panel as a further deterrent to theft.

Abstract: A car stereo has a removable panel attached to a body of the car stereo, the panel having a plurality of operation buttons for operating the car stereo. An alarm device is provided in a motor vehicle. A first detector is provided for detecting removing of the panel from the body, and a second detector is provided for detecting turning on of an ignition switch of the motor vehicle. A third detector is provided for detecting opening of a door of the motor vehicle. At lapse of a predetermined first period of time after the detection of the door open, the alarm device is operated unless detection of attaching of the panel and turning on of the ignition switch.

Abstract: An anti-hijack system which includes a nozzle arranged to be normally hidden from view mounted on the front section of a vehicle in the window well of the front windshield in such manner that the spray therefrom will impinge upon a person outside the vehicle and in the vicinity of the driver's door. As an alternative this can also be for both the driver's side and the passenger's side. The nozzle includes a diverter positioned to provide both cone and flat patterns of spray according to the arrangement thereof, and a spiral fluid director is positioned to effect the fluid spray as it ejects from the nozzle. There is a reservoir of incapacitating fluid adapted for mounting on a vehicle and hidden from view and a pump for forcing fluid from the reservoir through the nozzle under pressure to spray the fluid outwardly of the nozzle. If desired, a hot cap type capacitor can be used to provide voltage regulation so that vehicle voltage is always available for energizing the pump.

Abstract: A centralized lock system for a motor vehicle, provided with a system-specific identity code word which is stored in memories of the satellite processors associated with the door locks as well as in the code word storage memory of the central processor and the code words are transmitted back and forth along the base or line connecting the electronic controller with the door locks. An identity test is effected at these memories and upon failure of the identity test, the door lock and/or electronic controller or all of the door locks and preferably also the electronic controller are deactivated. This prevents ready replacement of the components since the system will not recognize a foreign component and deactivation will occur upon an attempt to substitute a foreign component for one of the original family of components of the system.

Abstract: A safety system for protecting movable objects such as alarm systems of motor vehicles, although the same basic ideas can be applied for example to cases, computers and the like, which are to be protected from an unauthorized use or removal. Particularly, the safety system for the vehicle comprising state indicators may for door contacts, oil pressure pick ups, temperature pick ups and the like; and state transducers may for control lighting means, starter, and the like. Both the state indicators and state transducers are continuously emitting code signals to identify themselves to the primary control unit and second control unit via the common information transmission channel.

Abstract: A vehicle entry control system utilizing electrically operated deadbolts, actuated in response to the code signal of a remote control transmitter, which provide positive protection against the various mechanical techniques used to defeat conventional vehicle door locks. The system uses electrical linear actuators to position the deadbolts, a door interlocked switching circuit, with the deadbolts positioned to allow the mechanical release of the deadbolts in the event of a malfunction, but to accomplish this requires the facilities of a service shop and an amount of time and labor that would be prohibitive for a thief.

Abstract: A vehicle anti-theft system in which, only when the ID signal is obtained from a right ignition key and when the vehicle anti-theft function is halted by the failure of an anti-theft circuit or theft detection unit itself, the start-up of the engine is permitted. The system comprises a unit for generating a start-up enable signal in response to a verification signal representing a right ID signal, and an engine control unit for performing the start-up control of the engine in response to the start-up enable signal and disabling the engine in response to a theft signal. The start-up enable signal generating unit generates a start-up enable signal in response to the fault signal. A dummy line for detecting a breakage is wired along various signal lines wired on the substrate of an immobilizer, which, if intentionally broken by an ill-intentioned third party, could cause a fault signal similar to that for the failure of the immobilizer to be outputted from a determination signal output terminal.

Abstract: A security device which is particularly suitable for motor vehicles is proposed. It comprises an electronic control unit (10) for controlling the functions of an apparatus to be protected, at least two sensors (U.sub.1, U.sub.2) for detecting specific operating states of the apparatus to be protected and a circuit (42) to which the output signals of the sensors (U.sub.1, U.sub.2) are fed. The circuit (42) carries out an exchange of data with the electronic control unit (10) in order to control its operational capability, the output signals of the sensors (U.sub.1, U.sub.2) influencing the exchange of data according to the detected operating state such that the electronic control unit (10) is only operative in a prescribed operating state of the apparatus to be protected. For this purpose, the circuit (42) has a memory (44) in which at least one predetermined code is stored.

Abstract: A receiver is presented herein for use in a keyless vehicle entry system for controlling a vehicle device function, such as unlocking a vehicle door, in response to a vehicle function request signal received from a portable transmitter. The receiver includes a controller having a normal mode of operation during which it receives a request signal and determines whether the request signal is valid and, if so, it initiates the vehicle device function. The controller has a diagnostic mode of operation during which it initiates the vehicle device function in response to receiving a request signal without determining whether the request signal is valid. Provision is made for switching between the modes of operation.

Abstract: An anti-vehicle-thief apparatus having an immobilizer unit for comparing a specific first code received from a transponder to a stored code just after an engine is started, and when these codes are identical, outputting a second code to an EGI unit, the EGI unit for comparing the second code to a stored code, and when these codes are identical, permitting the engine to continue operation, a CPU for counting the number of times that an ignition switch power supply is turned ON and OFF during a code comparison time period, and backup RAM capable of storing the counted number of times that the ignition switch power supply is turned ON and OFF for a predetermined time period. When the ignition switch power supply is turned ON and OFF repeatedly more than a predetermined number of times, the EGI unit causes the engine to stop.

Abstract: An automotive security system in which an infrared motion detector in the handle recess of a door of the vehicle detects the incipient engagement of the handle by an authorized user to trigger the vehicle transponder into transmitting an interrogation signal. The latter is picked up by a portable transponder on the person of that individual and which then emits a coded answer signal. The latter is compared in the vehicle transponder with a stored code and upon agreement the door lock is released so that the lock release is complete as the user exerts an initial pull on the door handle.

Abstract: A steering lock including a lock body which has a plurality of chambers that hold a horn, a lock cylinder, an alarm control circuit board, and a battery respectively, a locating bar having one end fixedly secured to the lock body at one side and defining a longitudinal plug hole, and an opposite end terminating in a hook adapted for attaching to the steering wheel, a locking bar having one end inserted into the longitudinal plug hole and locked by the lock cylinder, and an opposite end terminating in a forked end adapted for attaching to the steering wheel to secure the steering lock in place, the alarm control circuit board having an inductor adapted for detecting the locking/unlocking position of said locking bar so as to turn on/off the alarm circuit subject based on the position of the inductor.

Abstract: The security system comprises a coil (34) close to the vehicle ignition lock (38), a control unit (10) for energizing the coil and a transponder which comprises a coil (32), a transistor (30) and a transmitter (24) and a power supply (26). In use the coil (32) picks up a conventional alternating magnetic signal emitted by the coil (34), and provides sufficient power to activate the transistor (30) which connects the power supply (26) to the transmitter (24) causing it to transmit an enabling signal to the control unit. The control unit may be programmed to re-mobilize the vehicle engine on receiving of the correct signal.

Abstract: A removable security device for a vehicle is provided, having at least one portion adapted to be inserted into a cigar/cigarette lighter of the vehicle. A terminal receives power produced by an external power supply, and a signal modifier modifies a characteristic of the power produced by the external power supply to produce a verification signal. A reader detects a presence of the verification signal, and an enabler enables the vehicle to be driven when the presence of the verification signal is detected.

Abstract: A passive arming vehicle alarm system has a valet mode which is activated or deactivated by wireless remote control, thus avoiding the need for hiding a valet switch in the vehicle and subjecting the vehicle to attack at the valet switch. The wireless remote control is also used deactivate the alarm when the alarm is sounding, by depressing any of the buttons on the wireless remote control, regardless of the primary function of the button. As a result, the alarm may be quickly deactivated. The alarm also features progressive passive arming; the alarm emits a brief signal such as a siren chirp as a warning, prior to passively self-arming. As a result, the owner/operator will be warned that the vehicle is about to passively arm and may prevent passive arming (e.g., by opening a door) if it is undesired.

Abstract: A security system or preventing unauthorized removal of a vehicle accessory such as a radio from a mounted position on the vehicle comprises a dispensing container containing a pressurized protective material such as a pepper gas and having a dispensing valve displaceable from a closed position to an open position in which the protective material is dispensed from the container. A valve actuating member is responsive to displacement of the accessory from its mounted position to displace the dispensing valve from the closed to the open position whereby the protective material is dispensed from the container.

Abstract: A judgment is made as to whether an ignition key is inserted into a key cylinder, and when the ignition key is inserted into the key cylinder, a keyless entry operation is forbidden. Here, a judgment is made as to whether a door on a driver's seat side is slammed shut by a driver, and when the door on the driver's seat side is slammed shut, forbiddance of locking/unlocking control is canceled according to a command signal transmitted from a transmitter.

Abstract: A lock-set for an automobile consists of a padlock body, a fixing rod and a holder. The padlock body includes a turnable cramp, a cylinder linking with a pushing bar and engaging with the cramp. One end of the pushing bar comprises an elastic element engaging with a switch within the fixing rod. The switch connects to an alarm circuit board in the holder. When the padlock body is secured on a steering wheel by the cramp, the elastic element of the pushing bar urging the switch inwardly thus activates the alarm system.

Abstract: An immobilizer for a motor vehicle and a method for operating the immobilizer include a test unit, control devices connected through a data line to the test unit, and at least one ignition key having a transponder. When the ignition key is actuated, the test unit transmits a request signal through the data line to all of the control devices, which respond thereto by transmitting back identification codes which are compared with desired codes. The test unit prevents starting of the motor if fewer than a prescribed number of control devices reply with their identification code. The test unit enables all of the control devices if at least the prescribed number of control devices reply with their identification code word, in the event of interrogation.

Abstract: When a key is inserted into a key cylinder and a key insertion switch switches from an open state to a closed state, a signal is provided to a main relay controller. This main relay controller provides a low level signal to a base of a first transistor to actuate a coil. Therefore, a contact point is closed and power is supplied to an anti-theft controller and an engine controller. Thus, these controllers do not consume power until the key insertion switch is closed and thus, their construction can be made simple since there is no need to operate them in a sleep mode.

Abstract: If agreement between an identification code transmitted from a transmitter 111 installed in a door key 11 and a predetermined identification code is detected in an immobilizing ECU 12, a variable code including a predetermined key word is transmitted from the immobilizing ECU 12 to an engine ECU 13, and the variable code is decoded in the engine ECU 13. If the decoded key word does not agree with the predetermined key word, the starting of the engine is inhibited.According to another aspect of this invention, a variable code is transmitted from the engine ECU 13 to the immobilizing ECU 12, a returning variable code is calculated based on a predetermined key function in the immobilizing ECU 12, and it returns to the engine ECU 13. If an agreement with returned variable code and a reference variable code determined in the engine ECU 13 is detected for the predetermined period, the starting of the engine is inhibited.

Abstract: A vehicle security system includes a vehicle sensor, an alarm indicator, and a controller operatively connected to the vehicle sensor and alarm indicator. The controller includes a remote panic lock control feature for moving one or all of the vehicle door locks to the unlocked position and generating an alarm responsive to receipt of a remote panic signal from a remote transmitter and when the controller is in the armed mode. Accordingly, an owner returning to his vehicle may press the panic button on his handheld remote transmitter thereby causing the alarm to sound and the driver's door or all the doors to be unlocked to permit entry of the owner into the relative safety of his vehicle. The controller also preferably moves an unlocked vehicle door lock to the locked position a first time after receipt of the remote panic signal, such as in the event of an inadvertent pressing of the remote panic switch.

Abstract: In the case of an antitheft system for motor vehicles comprising several control apparatuses for vehicle components, which can be cleared when a fed testing information corresponds to a predetermined reference information, the testing and the reference data differ from one another for at least two control apparatuses.

Abstract: A security/antitheft system in combination with a vehicular automated transmission system (10) is provided, requiring a minimum or no additional hardware. The security system includes logic rules for the transmission system controller (38) for preventing the controller from issuing the command output signals necessary for mobilizing the vehicle in the absence of operator-initiated enabling signals and, preferably, for interpreting a predetermined sequence of manipulations of the existing selector (1) as the required enabling signals.

Abstract: A key-in-ignition lock reminder system uses a key having a transponder with an identification code. An ignition lock for receiving the key has an adjacent antenna. A door proximity switch connected to the door generates a door open signal when the door is open. A control module is connected to a door lock control, the door proximity switch and a memory storing at least one identification code. The control module energizes the antenna coil which energizes a transponder. The transponder then transmits an identification code which is received by the antenna. The control module generates a control signal if the code from the transponder is equivalent to an identification code stored in the memory and the door proximity switch indicates the door is open. An indicator connected to the control module receives the control signal and generates an indication that the key is in the ignition lock.

Abstract: A vehicle starting control apparatus is provided that both inhibits and allows rotation of a steering shaft, and controls starting of an engine in accordance with the operation performed when the correct electronic code has been inputted to the apparatus, making the apparatus easier to use. The apparatus includes an operation selecting unit and a operation position detecting unit that rotate in accordance with the rotation of an operational unit. An identifying unit drives a drive if an electronic code provided to the identifying unit is the correct one. The drive normally inhibits the operation selecting unit from rotating. The drive releases the operation selecting unit from the rotation inhibited state in accordance with the driving by the identifying unit, so as to allow the operational device to be operated. A steering lock unit removes the steering locked state in accordance with rotation of the operational unit.

Abstract: An actuating assembly used in motor vehicle having an alarm system, a door having a panel, and a latch has a handle extending longitudinally outside the panel and having one end coupled to the latch and another end projecting through the panel and provided with a fork having a longitudinally open seat and a backing plate on inside the panel and provided with a transversely extending pivot bar engaged in the seat of the fork. The handle is pivotal about the bar between a rest position relatively close to the door and an outer actuated position pulled out from the door. An electrical conductor imbedded in the handle has a pair of opposite ends exposed longitudinally at the fork. Respective contact elements secured to the door are releasably engaged with the conductor ends. The contact elements and opposite ends are positioned such that on movement of the handle outward beyond its outer actuated position at least one of the contacts is separated from the respective conductor end.

Abstract: A car security system capable of sending out an alarm when a car door is opened by an unauthorized person comprises a power stabilizing circuit for providing working DC power for the security system, a signal amplifying circuit for detecting small voltage change signals in the car battery and for generating therefrom an amplified signal, an alarm circuit including a buzzer and a controlling transistor, a microprocessor for receiving and then evaluating the amplified signal. In operation, when a car door is opened, a voltage change signal is produced, which is then detected for evaluating whether the opening of car door is authorized. If a voltage change signal is detected during conditions other than the car door opening, it is identified as a false alarm.

Abstract: A combination underhood security switch and lamp assembly that provides a security signal to a body control module of a vehicle indicative of an unauthorized entry into an engine compartment of the vehicle. The lamp assembly includes a switch that is closed when the vehicle hood is raised. When the switch closes, the lamp assembly is illuminated and a hood open signal is sent to the body control module. If the security system is armed, the body control module initiates an alarm signal of an unauthorized entry into the engine compartment of the vehicle.

Abstract: An engine control device exhibiting a unique vehicle anti-theft function which prevents a vehicle from being stolen when equipped physically on a vehicle in place of an engine control device with vehicle anti-theft function. The antenna unit detection circuit in an ECU 30b' instructs engine ECU 16 to inhibit engine control when it is detected that an antenna unit 29 which should not originally be connected to ECU 30b' has been connected to ECU 30b', that is, the ECU 30b' without anti-theft function is attached to a vehicle to which an ECU 30a with anti-theft function is to be attached.

Abstract: A series compensator for damping power oscillations in an electric power transmission system includes a switching power converter which injects a voltage into the transmission line having a phase angle relative to transmission line current which is controlled to provide reactive compensation and to inject virtual real impedance into the line. The switching power converter is a dc to ac converter which is capable of injecting virtual real impedance into the transmission line by virtue of the fact that it has a power exchange device connected to its dc terminals. Where the power exchange device is a resistor, the switching power converter is capable of absorbing real power during surges in power on the line. Alternatively, the power exchange device is a storage device such as a battery bank or a super conducting magnet, in which case the switching power converter can provide both virtual positive and negative real impedance.

Abstract: A system for preventing theft of cargo from a cargo area of a truck is disclosed. The system includes a lock for locking shut a door to the cargo area of the truck when the lock is engaged. The lock allows the door to the cargo area to be opened when the lock is disengaged. A receiver receives a signal from a remote location. The lock is controlled in response to the signal received from the remote location such that the lock is disengaged when the signal received from the remote location is indicative of predetermined information.

Abstract: An apparatus and method for preventing car-jacking including a receiver situated within a vehicle and adapted to allow the receipt of the activation signal and deactivation signal from an off site transmitting source similar to that employed in the art of pagers. Also included is a control mechanism electrically connected to an existing alarm, ignition coil of a vehicle, and the receiver. The control mechanism is adapted to activate the alarm and deactivate the ignition coil after a predetermined amount of time upon the receipt of the activation signal by the receiver. The control mechanism is also adapted to deactivate the alarm and activate the ignition coil upon the receipt of the deactivation signal.