Abstract: A housing arrangement can be connected to a flywheel for rotation in common around an axis of rotation, and a pressure element is connected to the housing arrangement for rotation in common around the axis of rotation but is able to shift in the axial direction. A release spring arrangement includes at least one spring element which acts on the pressure element and is supported against the flywheel after the housing arrangement has been attached to the flywheel. Each spring element is held in place on the pressure element by means of a fastening element.

Abstract: A tachometer circuit including a flutter reduction circuit and a tachometer is described. The tachometer circuit cancels pointer flutter in the tachometer without adversely affecting pointer response.

Abstract: A modular display panel is formed of a segmented symmetrical graphics panel having display pixels. The panel's interlock in for directions to allow forming larger electronic graphics panel. The preferred shape of the panel is square, defining a perimeter with for edge surfaces. Each of those edge surfaces includes an electrical connection thereon. A frame assembly forms the outer portion of the panel, thereby allowing providing of signals and power to the units.

Abstract: A housing arrangement can be connected to a flywheel for rotation in common around an axis of rotation, and a pressure element is connected to the housing arrangement for rotation in common around the axis of rotation but is able to shift in the axial direction. A release spring arrangement includes at least one spring element which acts on the pressure element and is supported against the flywheel after the housing arrangement has been attached to the flywheel. Each spring element is held in place on the pressure element by means of a fastening element.

Abstract: According to the present invention, an emergency power supply to be coupled to an electric power source providing an incoming AC signal may include an input/output terminal, a battery with a DC voltage, a rectifier coupled directly to the input/output terminal and connected to the battery, an inverter coupled directly to the input/output terminal and connected to the battery, and a control circuit coupled to the rectifier and the inverter so that in a first operational mode the rectifier is coupled to the battery to rectify an incoming AC signal at the input/output terminal to charge the battery and the inverter is decoupled from the battery, and in a second operational mode the inverter is coupled to the battery to invert the DC voltage to provide an outgoing AC signal at the input/output terminal and the rectifier is decoupled from the battery.

Abstract: According to the present invention, an emergency power supply to be coupled to an electric power source providing an incoming AC signal may include an input/output terminal, a battery with a DC voltage, a rectifier coupled directly to the input/output terminal and connected to the battery, an inverter coupled directly to the input/output terminal and connected to the battery, and a control circuit coupled to the rectifier and the inverter so that in a first operational mode the rectifier is coupled to the battery to rectify an incoming AC signal at the input/output terminal to charge the battery and the inverter is decoupled from the battery, and in a second operational mode the inverter is coupled to the battery to invert the DC voltage to provide an outgoing AC signal at the input/output terminal and the rectifier is decoupled from the battery.

Abstract: According to an aspect of the present invention, an induction motor driver includes a DC power supply having a selectively variable voltage. The driver also includes an inverter coupled to the DC power supply and coupleable to an induction motor, the inverter selectively actuateable to generate from the selectively variable voltage of the DC power supply a low-frequency series of square-shaped pulses, the series of square-shaped pulses having a frequency and each pulse having an amplitude related to the selectively variable voltage.

Abstract: According to an aspect of the present invention, an induction motor driver includes a DC power supply having a selectively variable voltage. The driver also includes an inverter coupled to the DC power supply and coupleable to an induction motor, the inverter selectively actuateable to generate from the selectively variable voltage of the DC power supply a low-frequency series of square-shaped pulses, the series of square-shaped pulses having a frequency and each pulse having an amplitude related to the selectively variable voltage.

Abstract: According to the present invention, an emergency power supply to be coupled to an electric power source providing an incoming AC signal may include an input/output terminal, a battery with a DC voltage, a rectifier coupled directly to the input/output terminal and connected to the battery, an inverter coupled directly to the input/output terminal and connected to the battery, and a control circuit coupled to the rectifier and the inverter so that in a first operational mode the rectifier is coupled to the battery to rectify an incoming AC signal at the input/output terminal to charge the battery and the inverter is decoupled from the battery, and in a second operational mode the inverter is coupled to the battery to invert the DC voltage to provide an outgoing AC signal at the input/output terminal and the rectifier is decoupled from the battery.

Abstract: According to the present invention, an emergency power supply to be coupled to an electric power source providing an incoming AC signal may include an input/output terminal, a battery with a DC voltage, a rectifier coupled directly to the input/output terminal and connected to the battery, an inverter coupled directly to the input/output terminal and connected to the battery, and a control circuit coupled to the rectifier and the inverter so that in a first operational mode the rectifier is coupled to the battery to rectify an incoming AC signal at the input/output terminal to charge the battery and the inverter is decoupled from the battery, and in a second operational mode the inverter is coupled to the battery to invert the DC voltage to provide an outgoing AC signal at the input/output terminal and the rectifier is decoupled from the battery.

Abstract: A multiple plate friction clutch with a hub which has external gearing and a peripheral groove. A ring or a ring segment is placed in this groove and is used to fix the hub in place axially with respect to the clutch plates, which are non-rotationally engaged by means of internal gearing with the external gearing of the hub.

Abstract: An aged exhaust gas oxygen sensor (EGO) simulator is inserted between an exhaust gas oxygen sensor and an electronic control module for testing the response of fuel control and emission systems to various amounts of exhaust gas oxygen sensor aging/degrading. The sensor signal is input to a summing amplifier where a delay signal is added. Positive and negative summing amplifier outputs go through vernier and decade controls, which add delay, and then to a variable gain inverter. The difference signal is integrated and output to the summing amplifier as the delay signal and output to a ground offset control for shifting the waveform up and down before going out to the control module. The vernier and decade controls add delays to mimic an aged/degraded exhaust gas oxygen sensor.

Abstract: Air/fuel ratio in an internal combustion engine is controlled so as to test the operation of an exhaust gas oxygen sensor. The engine is divided into two banks, each bank including an intake bank of cylinders, an exhaust path, and an exhaust gas oxygen sensor in the exhaust path. Air/fuel ratio control signals are used in connection with each of the two banks, the control signals being 180.degree. out of phase with each other.

Abstract: Method and apparatus for controlling ignition timing during alternating rich and lean fuel-air composition excursions for efficiency and for controlling torque fluctuations associated with the excursions. The method, for use in a vehicle having an internal combustion engine including an electronic fuel and spark control module, includes reducing spark advance instantaneously during a rich fuel-air excursion, and increasing spark advance during a lean fuel-air excursion. The amount of spark advance adjustment is preferably determined utilizing nonlinear functions which relate spark, torque ratios, and air-fuel ratios.

Abstract: Functionality of the exhaust gas oxygen sensor is determined by continually monitoring the exhaust gas oxygen sensor voltage to determine both a peak rich voltage and peak lean voltage. Based on the information after some predetermined time period, a system determines whether rich air/fuel ratio excursions are required and lean air/fuel ratio excursions are required. If a rich air/fuel excursion is required, then there is a command to decrease the air/fuel ratio to make it rich until the peak rich voltage is greater than a predetermined threshold voltage. Analogously, if a lean excursion is required, then there is a command to have a lean air/fuel ratio excursion done until the peak lean voltage is less than a predetermined threshold. If a time out happened before the peak rich voltage was greater than the rich threshold or the peak lean voltage was less than the lean threshold, then there is a determination that there is a malfunction detected on the sensor/circuit.

Abstract: Method, for controlling fuel supply to an internal combustion engine utilizing a modulated air-fuel signal having a modified square-wave waveform, of monitoring operation of an oxygen sensor for sensing engine exhaust gas oxygen level. The method includes generating the modulated air-fuel signal having the modified square-wave waveform designed to produce a particular engine exhaust response for interrogating the oxygen sensor, and operating the engine based on the modulated air-fuel signal. The oxygen sensor produces an associated output signal in response to sensed exhaust gas oxygen levels. The method also includes processing the output signal of the oxygen sensor associated with the particular engine response so as to determine the operating condition of the oxygen sensor and to verify acceptable test conditions.

Abstract: The invention relates to inorganic-organic compound substances useful for biomedical purposes. The object of the invention is to develop inorganic-organic compound materials which overcome the disadvantages of the state of art, wherein inorganic-organic compound substances for biomedical purposes possess to a large extent specifically adjustable characteristics. Inorganic initial substances form a new solid chemical compound with organic initial substances. The inorganic initial component consists of a biocompatible silicate glass and/or a silicate glass ceramic of the system SiO.sub.2 -Al.sub.2 O.sub.3 -MgO-Na.sub.2 O/K.sub.2 O-F.sup.-, and/or a bioactive phosphate silicate glass and/or a phosphate silicate glass ceramic of the system SiO.sub.2 -Al.sub.2 O.sub.3 -MgO-Na.sub.2 O/K.sub.2 O-CaO-P.sub.2 O.sub.5 F.sup.- and/or of the system SiO.sub.2 -MgO-K.sub.2 O-F.sup.- -CaO-P.sub.2 O.sub.5, and/or a bioactive phosphate glass and/or a phosphate glass ceramic of the system P.sub.2 O.sub.5 -Al.sub.2 O.sub.