Abstract: A keyless motor vehicle starting system to replace a conventional ignition lock and ignition key of a motor vehicle. The system consists of a portable wireless transmitter and a receiver/controller board which is installed deeply inside the motor vehicle behind a steering column cover or cluster cover of the motor vehicle. The portable wireless transmitter has a power-code generator and a starter-code generator and controls a vehicle battery power supply and ON-OFF states of a motor vehicle starter by sending a radio-frequency-modulated power-code and starter code. A novel design is disclosed to avoid having to detect engine-running conditions and avoid using a feed-back-control circuit to de-energize the motor starter.

Abstract: A three-phase, low-pass filter for use in an electronic speed control system and wherein an adjustable speed drive is disposed in signal transmitting relation relative to an electric motor by an electrical conduit having a predetermined length, and wherein each single-phase circuit of the three-phase, low-pass filter includes an inductor having input and output nodes, a first resistor electrically coupled in parallel to the inductor, a second resistor having input and output nodes, and wherein the input node of the second resistor is electrically coupled to the output node of the inductor, and a capacitor having input and output nodes, and wherein the input node of the capacitor is electrically coupled to the output node of the second resistor, and wherein the low-pass filter is electrically coupled to the electrical conduit and operable to substantially filter out frequencies that tend to excite the natural resonant frequency of the electrical conduit.

Abstract: A system is provided for use with an automotive vehicle having a normally disabled ignition system. The system includes a reader, such as a fingerprint reader or retina reader, to identify the driver. The output from the reader is compared to corresponding physiological data stored in memory to determine if the driver is authorized to operate the vehicle. Optionally, a timer is employed to permit operation of the vehicle only during preset prescribed time periods.

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 security system for an automotive vehicle having an engine is operatively connected between engine running electrical components that are connected to an electrical power source and a lock switch having at least two operative positions. The security system has a lock switch operator having a memory device carried thereon with a first security code stored in the memory device. A theft control module having a memory storing a second security code is operatively connected between the switch and the engine running electrical devices. The theft control module operates to first permit the engine running electrical components to enable the starting of the engine and then to compare the first and second security codes. Before starting the engine, a counter is compared to a predetermined number so that the engine starting is limited to only a predetermined number of attempts. The engine is disabled if the number of attempts exceeds the predetermined number.

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: 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: An active filter for compensation of polluting harmonics on an electricity distribution network comprising a source of energy (19, 20), a bridge converter (21) connected between the energy source and the network, control means which control the bridge converter in order to compensate for the polluting harmonics, characterized in that the state of the energy source (19, 20) is independant of the control of the bridge converter carried out by the control means (22) and in that the control means (22) control the injection of the harmonic components independantly of the state of the energy source.

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: 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: Time required to start an engine is shortened by avoiding a collision in data exchange communication between an engine control device 3 and an anti-theft security device 6. Also, an attempt is made to achieve improved security and an improved reliability of communication.

Abstract: Filter equipment is adapted for connection to an ac power network (N) for damping of current harmonics originating from an installation (TR, SR1, SR2), connected to the network, for power transmission by means of high-voltage direct current. The equipment has a three-phase filter set (F) with three filter branches which are each normally connected to a separate phase of the network via first switching members (BO). A spare filter branch (FR) is arranged as a stand-by for the three filter branches of the filter set (F) and is adapted for connection to an optional phase of the network by means of second switching members (BR).

Abstract: A system for the identification and automatic detection of vehicles or objects includes an electronic label installed in each of the vehicles or objects, each of these electronic labels having means for memorizing an identification code assigned to a vehicle or object in which the electronic label is installed and radioelectrical transmission and reception means for transmitting this identification code, and at least one mobile reader disposed exterior to the vehicles or objects and movable within a vicinity of these vehicles or objects.

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 anti-theft car protection system has a first control unit for controlling the fuel injection to an engine. The first control unit is capable of starting the engine upon receiving an engine start instruction signal and capable of storing a first rolling code. A second control unit is provided which is capable of storing a second rolling code. The system provides an interactive communication between the first and second control units when actuated and issues "ON" signal when an ignition key cylinder of an associated motor vehicle is turned from "OFF" position to "ON" position. The system, upon receiving the "ON" signal, feeds the first control unit with the engine start instruction signal and sends the second rolling code to the first control unit. The system then compares the first and second rolling codes and issues an agreement signal upon agreement of the first and second rolling signals and issues a disagreement signal upon disagreement of these signals.

Abstract: A vehicle anti-theft device for securing a vehicle is provided. The anti-theft device includes a plurality of control units electrically coupled between the vehicle electrical system and vital electrical components of the vehicle for controlling the delivery of power to these components. The control units normally interrupt power to these components but provide a path of power upon receiving an activation signal. The control units are directly coupled between the vehicle electrical system and the controlled electrical components and are powered by the vehicle electrical system. The anti-theft device also includes a transmitter device for transmitting an activation signal to the control units. When the control units receive this signal, they switch power to their respective components to allow their operation. The signal transmitted by the transmitter device is an audio frequency signal or a low power FM broadcast signal which is not widely broadcast remote from the vehicle.

Abstract: A power switching apparatus includes a positive-sequence fundamental signal magnitude detector. The positive-sequence fundamental signal magnitude detector derives a positive-sequence fundamental signal from a three-phase voltage signal carried by a power line; it also generates a switch firing command when the positive-sequence fundamental signal exceeds a predetermined threshold value indicative of a fault condition on the power line. The power switching apparatus also includes a solid state switch connected to the power line and the positive-sequence fundamental signal magnitude detector. The solid state switch bloch power on the power line in response to the switch firing command.

Abstract: A security system for an automotive vehicle having an engine is operatively connected between engine running electrical components that are connected to an electrical power source and a lock switch having at least two operative positions. The security system has a lock switch operator having a memory device carried thereon with a first security code stored in the memory device. A theft control module having a memory storing a second security code is operatively connected between the switch and the engine running electrical devices. The theft control module operates to first permit the engine running electrical components to enable the starting of the engine and then to compare the first and second security codes. Before starting the engine, a counter is compared to a predetermined number so that the engine starting is limited to only a predetermined number of attempts. The engine is disabled if the number of attempts exceeds the predetermined number.

Abstract: Ribs 9'a to 9'd provided in a connector 50b on the terminal device side are coincident with grooves 8'a to 8'd provided in a connector 40b on the ECU 30b side, but are not coincident with grooves 8a to 8d provided in a connector 40a in position, size and shape. Even if the connector 40b of the ECU 30b without the immobilizer CPU 13 is attempted to be engaged the connector 50a which should originally be connected to the ECU 30a with the immobilizer CPU 13, it cannot be engaged or right electrical connections between input/output terminals in the ECU 30a and corresponding terminal devices cannot be achieved. Accordingly, the theft of the vehicle by replacing the ECU 30a with the ECU 30b is prevented.

Abstract: A method and apparatus for vehicular data processing which enable quick, efficient input of first serial data entered from an external device and comparison of the first and second data with prestored second serial data. First serial data is repeatedly sent out asynchronously. The prestored second serial data is sent out in response to a request. Storing of the second serial data is performed until distinctive leading pulse of the first serial data is detected, at which time storing of the second serial data is suspended to permit storing of the first serial data in an interrupt mode.

Abstract: A vehicle anti-theft system in which a registration of an ID code of a new key to a vehicle side cannot easily be made by an ill-intentioned third party. Provided are a first memory for storing ID codes of operation keys and a second memory for storing an ID code of an L-key. Of a particular ID code of an inserted key has been registered as an operation key in the first memory, an immobilizer code stored in an immobllizer code memory is sent out to an engine ECU to enable the engine to be started up, and if the registered L-key is inserted, and operation keys are successively inputted, the renewal mode for the ID code is activated to rewrite the ID codes of the previously registered operation keys with ID codes of subsequently inserted operation keys in the first memory.

Abstract: A vehicle anti-theft engine control device enables engine control to be continued even if the data in the memory, wherein an ID code checking result has been stored, incurs "bit change" due to noise or the like, causing the data to change into data prohibiting engine control. The control device comprises a plurality of engine start enable flags for storing information on the enable/disable state of the engine control, enable flag registering means for registering "1" (enable) in all flags in response to a start permit signal, re-registering means for registering again, when "1" has been registered in at least one of the flags, "1" (enable) in all other enable flags, and control enabling means for enabling the engine control in accordance with the registered/reregistered enable flag.

Abstract: The disclosed AC harmonic first circuit utilizes band pass and stop filters that have resonance frequencies close to but yet a few Hz or a small percent away from the harmonic frequencies intended to be attenuated, the difference being comparable to the Q factor of the respective filter. Thus, every circuit filter has a different resonance frequency, and the difference between the filter resonance and harmonic frequencies might be 0.2-5%. Each filter attenuates the energy of each harmonic by possibly 10-50%. A network filter having a resonance frequency corresponding to the AC power network frequency is in series in the hot line between the power network source and the harmonic filter circuit. The circuit uses only passive components in reducing disruptive harmonics from the AC power network.

Abstract: A filter circuit for reducing electromagnetic interference in an ungrounded hree-phase delta electrical system. The filter circuit includes a low- pass filter associated with each power phase having one input and output terminal placing an inductor in series with a phase conductor from a power supply. Input and output capacitors connect to a second input and output terminals respectively. An inductor connects in common between the second input and second output terminals thereby to complete a loop that is isolated from ground. Voltage suppression circuits connect from each phase to ground on the input side of the filter.

Abstract: An electronic access control system for controlling a lock in which the inputs and outputs are multiplexed, the electrically programmable read only memory is written to and read from in a serial manner, and the operator can disable access codes and enable access codes in one operation. The device reduces power consumption when powering a solenoid or DC motor by pulsing the output power. Further, the device is able to be operated in a remote location whereby the remote device can accept inputs from a keypad, an electronic signal, or a telephone line. The remote device, when not in active operation, operates in a low power mode so that the remote device may be powered by a battery.

Abstract: An anti-theft system for a motor vehicle includes a portable transponder carrying code information. A stationary transceiver has an oscillator and an oscillating circuit being excited to oscillate by the oscillator at an oscillation being modulated by the transponder in synchronism with the code information. A demodulator demodulates the modulated oscillation of the oscillating circuit. According to one embodiment, the code information is obtained from the demodulated oscillation by sampling the oscillation at least at one predetermined sampling time. An arithmetic unit compares the code information with command code information and transmits an enable signal to a security unit if a match occurs. The modulated oscillation being shifted by a predetermined phase angle is sampled once again if initially no code information is recognized from the demodulator.

Abstract: An active current injection device is used to generate and inject fundamental and non-fundamental frequency current components onto an AC power line. A current pump control circuit receives an input signal which is representative of the line voltage of the power line. In response, the current pump control circuit generates a control signal which is used to generate a current component at the fundamental frequency which lags the line voltage by approximately 90 degrees. This fundamental frequency current component is transmitted through an impedance to the power line, thereby causing a voltage drop at the fundamental frequency across the impedance which is within a selected range about the line voltage. In one embodiment, this selected range is equal to approximately 25 to approximately 150 percent of the line voltage. Also, a damping control circuit receives an input signal which is representative of the line voltage of the power line.

Abstract: A remote engine starting apparatus is for installation in a vehicle for bypassing a theft-deterring start control circuit to permit remote starting of a vehicle engine. The theft-deterring start control circuit includes: an ignition switch for receiving a designated key having a preselected resistance, a first connector coupled to the ignition switch, a resistance sensing circuit portion for preventing starting of the vehicle engine unless the preselected resistance is sensed, and a second connector coupled to the resistance sensing circuit portion. The second connector is preferably matable with the first connector. The remote engine starting apparatus includes an interface device which, in turn, includes: a housing, a bypass circuit comprising a bypass resistor and a switching relay for selectively coupling the bypass resistor to the resistance sensing circuit portion to thereby enable starting of the vehicle engine without the designated key being in the ignition switch.

Abstract: A data processing apparatus for a vehicle which permits accurate and reliable registration of a key ID code in a vehicle. ID code detecting means detects an ID code received in succession from outside. The ID code detected previously is registered in the memory 132 for previous ID code; the ID code detected this time is registered in the memory 133 for the present ID code. First comparing means compares the previous ID code with the present ID code and if the two ID codes match, then the ID code is registered as a reference ID code in an EEPROM. Second comparing means compares the present ID code with the reference ID code and if the two ID codes match, then it issues an engine control enable (OK) signal to an engine CPU.

Abstract: A dual function theft prevention system including a plurality of numeric keys allowing a driver to enter a multiple digit numeric code and a magnetic strip reader for receiving and scanning an associated card with a code sequence present thereon. Also included is an ignition for actuating a conventional vehicle engine upon receipt of power and brake circuitry connected to a conventional anti-lock brake system module for engaging brakes of the vehicle upon the activation thereof and further allowing normal operation of the anti-lock brake system module upon the deactivation thereof. Finally, control circuitry is coupled to the numeric keys, magnetic strip reader, brake circuitry, and ignition. The control circuitry is adapted to provide power to the ignition and deactivate the brake circuitry upon receiving a proper multiple digit numeric code sequence via the numeric keys and subsequently receiving a proper code sequence from the magnetic strip reader.

Abstract: An active current injection device is used to generate and inject fundamental and non-fundamental frequency current components onto an AC power line. A current pump control circuit receives an input signal which is representative of the line voltage of the power line. In response, the current pump control circuit generates a control signal which is used to generate a current component at the fundamental frequency which lags the line voltage by approximately 90 degrees. This fundamental frequency current component is transmitted through an impedance to the power line, thereby causing a voltage drop at the fundamental frequency across the impedance which is within a selected range about the line voltage. In one embodiment, this selected range is equal to approximately 25 to approximately 150 percent of the line voltage. Also, a damping control circuit receives an input signal which is representative of the line voltage of the power line.

Abstract: An anti-theft alarm system for attended and unattended vehicles enabled by a remotely carried inviolable electronic chip that is read by a voltage supplying receiver. In the unattended mode, the system operates like a conventional alarm system capable of disabling an electronically based vehicle. In an attended mode, the operator can activate the system by brake pedal depression followed by opening of the door within a predetermined time. Upon this sequence of events, the system will allow the vehicle to operate for about 60 seconds allowing the victim to get out of harms way before the vehicle becomes disabled and initiates an alarm sequence. In this mode the only method of restarting the vehicle is by use of a by-pass switch which is easily hidden and known only to the vehicle owner. The system further provides a controller chip for use in all fleet vehicles which lock or unlock the access of the vehicle and a master chip giving access to any vehicle of the fleet.

Abstract: A vehicle anti-theft engine control device which is also applicable to an engine control unit without a vehicle anti-theft function and which can be used in combination with any type of vehicle anti-theft function as necessary. The engine control device for vehicle anti-theft function comprises an engine control unit for controlling the start of the engine in response to a start permit signal; an anti-theft function provision determining means for determining whether the engine is equipped with a vehicle anti-theft device or not and for issuing a signal indicating the presence or absence of the anti-theft function; a theft detector means for receiving a signal indicating that legitimate starting operation is being performed and for issuing a validation signal; and means for issuing a start permit signal in response to the validation signal received from the theft detector means or the signal indicating the absence of the anti-theft function.

Abstract: An anti-theft device for a motor vehicle wherein a personal identification unit is carried by an authorized operator of said motor vehicle and includes means for identifying its location in the vicinity of the motor vehicle. A vehicle control unit mounted onto the motor vehicle, has a first and second condition with means for allowing operation of the motor vehicle when the control unit is in the first condition and means for inhibiting operation of the motor vehicle when said control unit is in the second condition and means for shifting the control unit into the second condition at a time subsequent to removal of the identification device from the vicinity of the motor vehicle.

Abstract: To provide a control apparatus for a vehicle capable of performing the biasing, releasing, locking, and unlocking of an engine in the sequential action. A flat key is inserted in an opening portion of a casing constituting a controller. When the key is judged to be correct with respect to the vehicle, a current is allowed to flow in a solenoid, a solenoid plunger is actuated. As a result, a rachet plate is displaced, so that a first detector faces to a second detector. Thus, when an engine start switch is turned ON, a specified current is allowed to flow in a CPU of a controller. When the key is ejected from the casing, the engine is released, and the solenoid is turned OFF. At this time, by the turning of an operating lever, the first detector is separated from the second detector. By further turning of the operating lever a locked state of the handle occurs.

Abstract: A vehicle security system disables various electrical systems throughout the vehicle. A unique double-sided security key is used to complete the various circuits of the chosen electrical systems by matching physical codes on the key to that of an installed receiving unit mounted within or about the dashboard of a vehicle. The various combinations created by the coded key make a determination of how the various circuits are broken. The method of attempting to re-connect the circuits by trial and error is prohibitive to a would-be thief. The unit can be used to disable an automobile, boat, motorcycle, RV, etc. The device may include one or more blocking diodes within the circuits to produce false readings during attempted tampering.

Abstract: An add-on distortion scrubber for use in an AC power generation system comprises an parallel connected inverter having a first DC link capacitor coupled in parallel, and a series connected inductive tie impedance. The inverter produces an output voltage having controllable magnitude, phase, and frequency components and operates by sensing the AC voltage waveform of the AC power generation system and controlling its output magnitude, phase, and frequency to fundamentally match the AC voltage waveform. In this way, the inverter appears as a virtual no-load to the AC power generation system while removing the harmonics therefrom. Alternatively, the scrubber inverter may be configured as a dedicated load filter by coupling it to the power input of the load. The scrubber inverter senses the total power delivered to the load/scrubber combination and generates an appropriate waveform to cancel the harmonics generated by the load.

Abstract: A vehicle security system with an anti-theft controller which conducts a data exchange with at least one function controller, particularly an engine controller, in order to control its operational readiness, wherein the data exchange is conducted via a data line connecting at least the anti-theft controller and the function controller. Alternatively, an external device (4) can be connected to the data line (1), with the device being configured for the exchange of data with at least one of the controllers (2, 3, 3', 3") The data line is a line which is already in existence in the vehicle, particularly a K-diagnostics line and/or an L-diagnostics line in accordance with ISO standard 9141. For the control of the data exchange, one of the controllers (2, 3) connected via the data line (1) exercises the functions of the control unit.

Abstract: A hybrid active filter shunts three-phase power with passive elements tuned to have low impedance at a frequency of harmonic distortion. The passive elements are in series with controlled voltages sources providing cancelling currents to the harmonic currents. Rapid determination of the harmonic currents is provided in real-time through the use of a Park transformation reducing the variables which need to be manipulated. Measured currents as transformed are used to model undistorted current based on an average power consumed by the load. When the undistorted current is subtracted from the actual current, a harmonic current signal is produced that may be used to drive the voltage sources. The time domain method requires rapidly computed running averages and thus may be performed in-between the acquisition of the measured current samples.

Abstract: A high-voltage filter for filtering of harmonics in an electric power network comprises a first capacitive impedance element (C.sub.1) arranged in a first electric circuit (L.sub.1, C.sub.1) and a second (C.sub.2) capacitive impedance element arranged in a second electric circuit (L.sub.2, C.sub.2). The first and second electric circuits are inductively coupled to each other.

Abstract: A motor-vehicle lock system has a remote operator separate from the motor vehicle and having a key part having a predetermined bitting, a transmitter actuatable to transmit a main signal containing a main code word, and a transponder independent of the transmitter for receiving an interrogation signal and thereupon generating a callback signal containing a callback code word. A lock provided with a switch is actuatable mechanically by the key part to operate the switch. A receiver in the motor vehicle connected to a central lock controller receives the main signal including the main code word, extracts the main code word from the transmitted main signal, compares the extracted main code word with a predetermined main code word, and sends a release signal to the controller when the extracted main code word corresponds to the predetermined main code word to actuate the elements.

Abstract: This invention relates to an anti-theft device for an engine-driven vehicle having a control unit for controlling either of the supply of fuel to an engine and the ignition timing of this fuel, and a back-up mechanism acting for the control unit when the control unit is damaged. It is determined whether or not the control unit has functioned appropriately when the engine is started up, and if it is determined that it has not, the function of the back-up mechanism is prohibited. Hence, the engine will not start and theft of the vehicle is prevented even if, for example, the control unit is deliberately damaged and an attempt is made to start the engine. However, the back-up mechanism does function if the control unit develops a fault while the vehicle is running, and the vehicle therefore continues to run.

Abstract: In a generator starting apparatus, in which commercial frequency electric power supplied from an electric power system is converted into variable-voltage variable-frequency electric power to thereby start a gas turbine generator, a harmonic-component removing apparatus is provided which removes harmonic components contained in the converted variable-voltage variable-frequency electric power on the basis of the detected harmonic components. In addition, an apparatus for removing harmonic components generated in an electric power equipment is provided, wherein harmonic components contained in an electric power system are detected so that they may be removed.

Abstract: A remote-control access control device, particularly for motor vehicles, includes a stationary transmitter and receiver unit responding to actuation of tripping means for transmitting a question code signal, receiving an answer code signal, and furnishing an unlocking signal to an unlocking unit if the answer code signal matches a command code signal. A portable transponder has a receiver receiving the question code signal and a transmitter transmitting the answer code signal. The question code signal is repeatedly transmitted if no answer code signal has been received in response to an initial transmission, and a signal parameter is modified upon transmission of the answer code signal as a function of a field intensity of the question code signal or of a battery voltage of the transponder. Alternatively, a signal parameter is modified when the answer code signal is transmitted if an information content of the question code signal indicates an emergency operation state.

Abstract: An active filter device is provided for incorporation into a switchgear lineup. The switchgear lineup has a plurality of electrical sections including a main circuit breaker section and a load circuit breaker section spaced from the main circuit breaker section. The active filter device is applied as an integral part of the power distribution switchgear equipment, positioned between the main circuit breaker section and a load circuit breaker section. From a single location, power quality is improved for the aggregate of all loads connected to the switchgear and the upstream source. The power quality improvement may include harmonic current attenuation, harmonic voltage attenuation, load balancing, high speed power factor correction, and reduced magnitude voltage sags.

Abstract: A transponder embedded in a key and a reader/exciter coil surrounding the lock cylinder are inductively linked to provide energization to the transponder, causing it to emit a digital identification code. A control circuit associated with the coil supplies energizing coil current and analyzes the emitted code to verify the authenticity of the key. The coil and control circuit are contained in a planar multi-layer hardboard printed circuit having high circuit integrity and being very thin for accommodation in the lock assembly. Alternatively, the coil and control circuit are contained in a flexible printed circuit. There the coil includes two opposed elongated legs which are positioned on opposite sides of the lock cylinder and folded in a way to conform to the cylinder surface, forming in effect a very thin cylindrical coil. An extension on the printed circuit form a path to the control circuit which is remote from the cylinder.

Abstract: The invention provides a motor vehicle anti-theft system in which an authorization code, representing the access authorization, is transmitted via the vehicle starting line arranged downstream from the ignition switch, to a start release unit. A control unit for the engine start, previously in an engine-start-blocking condition, is thereby placed into a release condition, in which it transmits a start request (arriving from the starting line) to the starter motor. By using the starting line for transmitting the authorization code, it is achieved that the latter is coupled through a connection which is necessary for the start, and therefore cannot fail separately.

Abstract: An electronic antitheft device for a motor vehicle provided with conventional functional elements allowing the control of the operation of the vehicle, namely for example an electric battery for the general electric power supply of the vehicle, an electric starter and brakes, has a remote control box for transmitting a digital code carried for example by an infrared beam, the remote control box cooperating with a receptacle disposed in the driving compartment of the vehicle so that the digital code is only transmitted if the remote control box is disposed in the receptacle, and an electronic center having a digital code receiver, and switches connected to one or more of the functional elements so as to control their operation in the case of the reception of said digital code.

Abstract: A processor includes a keyport located within a vehicle interior. The keyport is operative in combination with a computerized key capable of transmitting a numeric digital signal through the keyport to the processor and controller, The processor and controller is further coupled to a piezoelectric sounding element and to a control relay.

Abstract: The apparatus includes an active filter, coupled in series, and a passive filter, coupled in parallel, to a power distribution network. The power distribution network includes a voltage source that induces input currents at a first end of the power distribution network. Nonlinear loads and other conditions on the power distribution network cause unbalanced power signals. The active filter controller of the invention uses synchronous transformations on the input currents to identify a negative sequence fundamental signal and a positive sequence fundamental signal, while filtering all harmonic components within the input currents. The negative sequence fundamental signal and the positive sequence fundamental signal are combined to form an active filter reference signal which is applied to the active filter. In response to the active filter reference signal, the active filter operates as a current controlled harmonic voltage source, carrying only the fundamental current, while only injecting harmonic voltages.