Abstract: An overhead line for electrical energy transmission includes at least one phase conductor which receives a phase current which has a phase and an amplitude. A compensation loop surrounds the at least one phase conductor. A compensation current which has a phase and an amplitude is fed into the compensation loop by a driving voltage. The phase and the amplitude of the compensation current is set with respect to the phase and the amplitude of the phase current flowing in the at least one phase conductor such that a magnetic flux produced by the compensation current counteracts a magnetic flux produced by the phase current. At least one additional loop surrounds the at least one phase conductor connected to the compensation loop. The driving voltage for the compensation current is produced in the compensation loop and in the at least one additional loop. The compensation loop and the at least one additional loop define the at least one phase conductor into at least two main sections.

Abstract: An electromechanical control unit for adjustment devices in motor vehicles which can be used with particular advantage in connection with a window lift drive in a vehicle door. The electromechanical drive, the electronics system and the switch of the electromechanical control unit form one pre-testable modular unit. Preferably each switch is in keyed engagement with a cover and is elastically mounted relative to the electronics system, for example through a flexible flat band cable connection.

Abstract: A vehicle convenience system comprising a wireless transmitter, having at least one switch therein, for communicating multiple channel commands to an expander, the expander responsive to activation of the transmitter and said expander having at least one expander output responsive to the channel commands received from the transmitter; the expander outputs being programmable to at least one user selectable mode.

Abstract: A flash charging circuit has first and second transistors (TR1, TR2) which are connected to opposite terminals of a primary coil of a transformer, a battery is connected to a center tap provided in a middle portion of the primary coil, and first and second drive pulse signals (S1, S2) are applied to the first and second transistors to drive them alternately with each other, to induce an alternating secondary current in a secondary coil of the transformer. Each of the first and second drive pulse signals have a shorter pulse duration (Pd) than a pulse separation (Ps). The phases of the first and second drive pulse signals are determined such that both the first and second drive pulse signals take a low level for a time (Ta) before and after each drive pulse of the first and second drive pulse signals, so that both the first and second transistors are OFF immediately before either of them is turned ON.

Abstract: The present invention relates to protection circuit and method for the EMI/RFI suppression system (2) of such a five-conductor electrical system in which the neutral conductor (N) is provided with a bandstop-type filter circuit (2) for the suppression of a harmonic interference current component. According to the invention, on the neutral conductor (N) is placed a current transformer (CT) having over its secondary a resistive branch (R.sub.1), and in parallel therewith, a filter branch (5) comprising a bandpass filter (LC) tuned to the fundamental frequency of said neutral-conductor filter circuit (2) and said filter branch (5) having in series with said bandpass filter branch (LC) a switch element (4) suitable for short-circuiting said neutral-conductor filter circuit (2) when current in said filter branch (5) exceeds a preset upper limit level.

Abstract: A power transfer system for applying backup electrical power to electrical systems is described which applies backup power automatically without power interruption and which is straightforward to implement and inexpensive to manufacture. The power transfer system has a direct current (DC) power bus as a common supply point for protected electrical equipment, thereby making prior art systems which provide power transfer between alternating current (AC) power sources and typically provide an AC power bus in common with the protected equipment no longer necessary.

Abstract: The present invention teaches a method for preventing the use of an unauthorized reproduction of a remote unlock signal. In this scenario, the unauthorized reproduction occurs by jamming the receiver from receiving the remote unlock signal while intercepting the remote unlock signal. Generally, the remote unlock signal is transmitted by a transmitter to the receiver within a vehicle having a lock, wherein the receiver initiates an unlock command in response to receiving the transmitted remote unlock signal, and the vehicle lock being mechanically actuated by a key or electronically initiated by the unlock command in a previous locking session.

Abstract: A tap-resistant security circuit. In the preferred embodiment, the apparatus includes a conduit including an electrically conductive wire surrounded by a gas-filled, gas impermeable sheath. At one end of the conduit is a pressure switch which is normally open but is maintained closed by the pressure in the gas-filled conduit. The other end of the conduit is sealed. If the gas-filled conduit is disturbed, for example, if an attempt is made to cut the wire, the gas within the conduit escapes, the pressure holding the switch closed drops and the circuit is opened. As a result, any attempt to by-pass or "tap" the wire results in the current through the wire being interrupted.

Abstract: A fuse device for a cable in vehicles, includes a current strength sensor having an evaluation circuit connected downstream, and a severing device for the cable. The severing device disconnecting the cable when a current strength exceeds a limiting value. The sensor, evaluation circuit, and severing device are located in a housing in which a section of the cable also runs.

Abstract: A key cylinder, upon receiving a valid key, inserted through the key cylinder, is disengaged from a cylinder lock enabling the key and the key cylinder to be rotated between two positions. During rotation, an arm on the key cylinder engages a contact carrier to switch a contactor mounted on the carrier between two positions breaking one contact and subsequently making another contact. The contacts provide output signals to a vehicle passenger restraint apparatus to selectively alternatively place the passenger restraint apparatus in an "on" or "off" state.

Abstract: A passive filter device for a capacitor in series with a substantially inductive transmission line of an electric transmission system is disclosed. The passive filter device comprises a double-loop RCL filter in parallel with the series capacitor. At power frequency, the filter device allows the power frequency current to pass through the series capacitor with minimum power losses. At sub-synchronous resonance frequencies, the passive filter device provides bypassing of the series capacitor with maximum selectivity of the RCL filter.

Abstract: An occupant crash protection device for a vehicle has: a current limiting circuit which receives a supply of a trigger signal generated when it is judged that a significant accident happens, and which controls a squib firing current to have a constant amount; a squib; and a mechanical acceleration switch, the current limiting circuit, the squib, and the acceleration switch being connected in series between terminals of a direct current power source.

Abstract: Power supplied from a battery via a power-supply line is distributed via switching means to load drive lines, connected to loads, respectively. Memory means stores the data of current-breaking time characteristics providing the breaking time which corresponds to the amount of each excessive current and the capacity of each load. When any of the current detection means has detected an excessive current flowing through any of the load drive lines, control means breaks power supplied via the load drive line to the load, by opening the switching means immediately after the corresponding breaking time has elapsed.

Abstract: An apparatus for transferring power and communication data across an annular gap comprises an inductively-coupled primary coil winding and secondary coil winding rotatable therein. Two signal oscillators are electrically coupled to a transistor for controlling current flow through the primary coil winding, thereby inducing a signal with a respective frequency in the secondary coil winding. An electronic switch operates so as to apply one of the two signals to the transistor for charging a capacitor coupled to the secondary coil winding, and operates so as to apply the other of the two signals to the transistor for discharging the capacitor. Actuation of control devices operate so as to modulate the impedance of the secondary coil winding. The inductive coupling of the two coil windings results in this modulation being mirrored by a modulation of the voltage developed across the primary coil winding.

Abstract: A communication link between a tractor and trailer is established utilizing existing dormant tractor and trailer circuitry. In one embodiment of the invention, a tractor communications device has a communications port connected to a turn signal circuit and a trailer communications device has a communications port connected to the same turn signal circuit. The two communications devices permit communications therebetween over the turn signal circuit as long as the turn signal circuit is inactive, and otherwise inhibits such communications. In another embodiment of the invention, each communications device includes a second communications port connected to the remaining tractor/trailer turn circuit. If electrical power is being supplied to the first turn signal circuit, the two communications devices automatically switch communications to the remaining dormant turn signal circuit.

Abstract: A power supply for maximizing the life of batteries such as but not limited to 12 volt DC batteries. Two batteries are preferably used. A timer is connected to the first battery output terminals. The timer regulates when a DC motor is turned on and off. The motor is connected to alternator connected to an output of the DC motor. The second battery is connected to and receives a charge from the alternator. An invertor outputs 115 volts at approximately 800 to approximately 1500 watts at 60HZ. The invention allows the first battery and the second battery to have an increased lifespan compared to being used separately. Embodiments for using the invention include computer set-ups, electrical golf carts, electrical car, medical devices, emergency backup power supply, and a portable canister supported container.

Abstract: An electric actuator return-to-normal failsafe system that utilizes a bank of storage capacitors to store electrical energy for returning an electrical actuator to a safe position in the event of a power failure. The failsafe system includes a regulator circuit that regulates the output of the storage capacitor such that a constant power output is applied to the electric actuator. The constant power output from the regulator circuit is also available to provide directional control of the actuator.

Abstract: A device for improving the quality of audio and/or video signals comprises a main electrical circuit comprising an integrated circuit arranged for producing an output pulse signal having a predetermined frequency, and a toroidal inductor having a magnetic core which has a central opening and which is surrounded by a conducting wire, said toroidal inductor being arranged to be powered by said output signal.The device is arranged between a power supply unit and a signal processing unit which is connected by at least a phase- and a neutral conductor to said power supply unit such that said conductors pass through said central opening of said magnetic core, said toroidal inductor creating an alternating magnetic field within its core when it is powered by said output signal, so that said magnetic field induces an electric field which acts on said conductors.

Abstract: An EMI prevention circuit has a first ground pattern grounded to a car body and a second ground pattern connected to the first ground patter by way of an EMI condenser. A large-current ground line through which a large current flows is connected to the first ground pattern by way of an EMI condenser. A small-current ground line in which a small current flows is directly connected to the second ground pattern without using any EMI condenser in between. Because of this, even when a ground potential of the first ground pattern fluctuates by a noise due to driving a large-current load, since the second ground pattern is directly connected to a ground side of a car battery, the second ground pattern is maintained at a ground potential of the car battery and does not fluctuate.

Abstract: An electrical arrangement is disclosed for use in supplying electrical power to the units in a motor vehicle. The arrangement comprises a battery, and an inverter to receive power from the battery and to generate a high frequency signal at an intermediate voltage higher than the voltage of the battery. There is a distribution network to distribute the high frequency signal to the units in the vehicle. At least some of the units supplied with electrical power are provided with step-up transformers to step-up the intermediate voltage to a higher voltage, that higher voltage being used by the units.