Aura Systems Inc.

Rjs Enterprises, Inc.

Tohoku Ricoh Co., Ltd.

Richard J Ulinski

Hugh C Clarke

W Stephen Heitz

Richard A Evers

Khaliqur Rahman

Keith O Stuart

Fernando B Morinigo

Richard N Stevens

A system is described for controlling the flow of electrical power between two sources. The system includes a circuit coupled between a first source and a second source and a controller subsystem coupled to the circuit. The circuit is capable of transitioning, in a continuous manner, between a first direction wherein electrical power flows from the first source to the second source and a second direction wherein electrical power flows from the second source to the first source. The control subsystem generates control signals to selectively activate switching elements of the circuit to control the direction and the amount of electrical power flowing through the circuit between the first and second sources.

Bi-directional power supply circuit

A power generation system is described for supplying electrical power to a load from at least one of a generator and a battery. The power generation system includes a power bus coupled to the generator and a bi-directional conversion unit coupled between the power bus and the battery. The bi-directional conversion unit is capable of transitioning between a first direction wherein electrical power flows from the power bus to the battery and a second direction wherein electrical power flows from the battery to the power bus.

Mobile power generation system

A power generator system, including an inductive generator for producing a generator electrical signal. The inductive generator contains electrically conductive stator field coil windings and an electrically conductive ferromagnetic disk-shaped rotor. The inductive generator is configured for under-the-hood installation and includes an input crankshaft for being externally driven by a motor vehicle engine. The generator is electrically coupled to an electronic control unit which responds to amplitude and frequency variation of the electrical signal, due to fluctuations in vehicle engine speed, and produces an output power signal having substantially constant voltage, substantially constant frequency, and at least one phase. The electronic control unit includes a three-phase vector controller for regulating the generator electrical signal which charges a DC voltage bus, a processor for monitoring the voltage level of the DC voltage bus, and an AC inverter which receives the DC voltage bus voltage, converts it into the output power signal and supplies the signal to an output connector in order to accommodate the connection of electrical devices to the system. If the vehicle engine speed is idle, the system implements a throttle control mechanism, coupled to the vehicle engine throttle, to adjust the engine speed in order to provide an adequate output power signal. The system also employs a safety shut-down subsystem for terminating operations of the generator in the event of a fault condition, such as, for example, generator overheating, generator current overload, and system overload.

Indicia having a requirement for a high degree of precision is printed onto a sheet and is scanned or read automatically shortly thereafter. Electronic control signals result from a comparison of the actually printed indicia with a pre-defined quality standard, and are used selectively to adjust command control signals to the printer to correct indicia printed thereafter. The leading edge of sheets to which the indicia is to be printed is precisely located by a light absorption detection or sensing mechanism which controls a sheet advance motor. The indicia printed, preferably bar code, is read by an optical bar code scanner traversing the printed code. The scanner is controlled by a scanner microprocessor control, and the printer is controlled by a printer microprocessor control which controls a comparison of the scanned code with a set quality standard to result in output signals to control the printer microprocessor control in a feedback loop to increase or to decrease the time of voltage application to printing elements in a thermal printer.

Self-correcting printer-verifier

The absolute spatial distance of the widths of individual bars and spaces of a bar code are precisely measured by a bar code scanning apparatus having two photodetector circuit elements positioned a fixed and predetermined distance from each other for sensing light reflected from the bars and spaces of the bar code at a fixed differential time. The photodetectors are part of an integral unit and are parallel in independent circuits connected to a digital processing unit and storage memory for clocking the passage of the two photodetectors over the bars and spaces against an absolute time determined from a constant frequency pulse generator or digital clock. The precise measurement is compared with references and a readout is provided. A method for determining the precise width of each individual bar and space includes the determination of an average velocity determined from the velocity of the photodetectors over the leading edge of a bar or a space, and of the velocity over the trailing edge of the bar or space. From the average velocity and the time, an absolute spatial distance is determined.

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Monrovia, CA, United States of America

Richard J Ulinski