Abstract: An rotor assembly 10 for use with an electrical machine. Assembly 10 includes two opposing and selectively intermeshing pole pieces 12, 14. Each pole piece 12, 14 has a body 16 and a plurality of integrally formed and outwardly extending projections or pole fingers 18. A plurality of magnets 34 are each fixedly secured, by use of swaged portions 36, within a unique one of several slots 38 which are cooperatively formed between a unique one of fingers 18 and a unique portion of body 16 of pole pieces 12, 14.

Abstract: A disk-type brushless single-phase DC motor comprising a single armature coil attached to a stator yoke of a stator, the armature coil having a closed loop structure. The armature coil has a plurality of uniformly spaced apexes corresponding in number to ½ of the number of poles in a rotor magnet. The armature coil also has sides each connecting neighboring apexes of the armature coil while being radially curved. Cogging generating protrusions are protruded from the stator yoke at positions spaced in a rotation direction of the rotor magnet from respective apexes of the armature coil by a desired angle. The armature coil having a closed loop structure maximizes an effective coil torque generated whereas the cogging generating protrusions generates an optimum cogging torque. Accordingly, it is possible to provide a stable drive performance even when a smaller amount of current is supplied, while achieving an improvement in assembling workability.

Abstract: Quartz crystal resonators 30 with a first angle of rotation having an X-axis 17 and Z′-axis 19 lying within a plane corresponding to an AT-cut and a second angle of rotation 34 within the plane of the AT-cut and lying within a range of about ±1° to about ±11.5° from the Z′-axis of the AT-cut. The resonators includes substantially opposing electrodes 36 disposed on major faces of the quartz crystal plate 32. The second angle of rotation 34 results in quartz crystal resonators 30 being produced with a more uniform distribution of temperature performances.

Abstract: The invention provides systems, methods and apparatus for processing delicate parts within a process tank such as an ultrasonic tank. Typically, one or more transducers connect to the tank and respond to drive signals from a generator to produce ultrasound within process liquid within the tank.

Abstract: A piezoelectric actuator intended for instance for actuating injection valves in internal combustion engines of motor vehicles is protected against destructive tensile strains in that resilient prestressing elements that subject the piezoelectric body to precompression are provided for the piezoelectric body of the actuator.

Abstract: A piezoelectric oscillator element (100) constituting a piezoelectric transformer is supported by lead frames (32, 34, 36). One of the ends of the lead frame (32) is welded to a primary side electrode (22) at a connection portion (31), and the other end is welded to a land (42). One of the ends of the lead frame (34) is welded to a primary side electrode (24) at a connection portion (33) and the other end is welded to a land (44). One of the ends of the lead frame (36) is welded to a secondary side electrode (26) at a connection portion (35) and the other end is welded to a land (46). The connection portions (31 and 33) are positioned at a node A of oscillation. Since the electrical and mechanical connection is achieved by the lead frames (32, 34, 36), the structure is simple, the thickness of the oscillator is easily reduced, and the oscillator is easily assembled.

Abstract: In a piezoelectric transformer device (36), a plurality of inner electrodes are stacked on each other on the left side. These inner electrodes are alternately connected to each other through interlevel connection conductors to constitute two inner electrode groups. A secondary output electrode in the form of a mesh is formed near the end portion of the device (36) on the right side. Only primary input electrodes (1,2) connected to the two inner electrode groups, a secondary output electrode (40), and the lead electrode of the secondary output electrode in the form of a mesh are exposed on the same surface of the device.

Abstract: Embedded electronics (102) are operated under normal operating conditions, with power being supplied to embedded electronics via a power source (205). Heat is generated via the normal operation of the embedded electronics (102), and a voltage (117) is generated via thermionic emission from the heat. The voltage (117) that is generated is supplied to the power source (205) to help power the embedded electronics (102).

Abstract: The present invention has an object to provide a method of manufacturing an electronic tube capable of eliminating deterioration of image quality due to an excessively high electron reflection effect of a material comprising a metal element with an atomic number not lower than 70 and painted on a shadow mask and deterioration of image quality due to spontaneous peeling of a coat on the surface of the shadow mask. A paint mainly comprising a solated metal oxide or a metal alkoxide of an element with an atomic number not lower than 40 is painted to form an electron reflection coat with an amount of coating of less than 2 mg/cm2 so as to achieve coating on an electron gun side surface of a shadow mask.

Abstract: In an inline 3-beam system color cathode-ray tube, an inline 3-beam system color cathode-ray tube electron gun is able to uniformise shapes of beam spots of three electron beams on the right and left end portion of a fluorescent screen as much as possible.

Abstract: A deflection yoke includes horizontal deflection coils; vertical deflection coils; and coils for correcting a vertical pincushion distortion, which coils are provided aside from the vertical deflection coils; wherein the coils for correcting a vertical pincushion distortion have such a wire-wound form as to generate a magnetic field having a pattern substantially equal to that of the vertical deflection coils. This is effective to carry a parabolic current with horizontal cycles for correcting a vertical pincushion distortion at a low voltage, and hence to simplify the circuit configuration and reduce the manufacturing cost.

Abstract: A low pressure mercury vapor discharge lamp comprising a fluorescent tube having an amalgam container containing amalgam to control mercury vapor pressure at a steady lighting, a holder holding both ends of the fluorescent tube, a lighting circuit to light the fluorescent tube, a case accommodating the lighting circuit, and a base provided to the case, wherein the amalgam container and the base are connected with each other by a heat conductive component, so that the amalgam temperature is controlled at a proper value and the luminous efficiency is improved.

Abstract: The present invention provides an electrode for a ceramic electrode fluorescent discharge lamp; an electrode material for a discharge lamp, which has high electron flow density, high thermal shock resistance, and reduced deterioration due to sputtering; and also a method for manufacturing the same. The invention makes it possible to reduce the tube diameter of the ceramic electrode fluorescent discharge lamp. An electrode material for a discharge lamp is obtained from a first component of 0.5 to 1.5 mols of BaO, CaO or SrO, a second component of 0.05 to less than 0.3 mols or more than 0.7 to 0.95 mols of ZrO2 or TiO2, and a third component of 0.025 to less than 0.3 mols of V2O5, Nb2O5, Ta2O5, Sc2O3, Y2O3, La2O3, Dy2O3, or Ho2O3, or 0.05 to less than 0.15 mols or more than 0.35 to 0.95 mols of HfO2, CrO3, MoO3 or WO3. This electrode material is granulated and is turned into a massive, granular, or porous electrode material.

Abstract: Laser-assisted chemical vapor deposition is used to form spacers at desired locations in a field emission display. The spacers can be designed with different shapes to provide increased strength and also to be formed differently depending on the their location on the display.

Abstract: The present invention relates to a flat display screen, comprising a cathode with electron emission microtips associated with a grid for extracting electrons from the microtips, the cathode/grid comprising conductive grid or cathode lines adapted to being sequentially addressed, and cathode or grid columns perpendicular to the lines and adapted to being addressed individually and simultaneously during the addressing of a line, and the screen comprising a return electrode adapted to being biased to a return potential corresponding to a no electron emission potential, each grid or cathode line being connected, via at least one resistive element, to the return electrode.

Abstract: A flat-panel field emission display comprises a luminescent faceplate, a rigid backplate, and an interposed or sandwiched emitter or cathode plate. A positioning spacer or connector ridge is formed on the rear surface of the faceplate to space the cathode plate a fixed distance behind the faceplate. A peripheral seal is formed between the faceplate and the backplate. The faceplate, backplate, and peripheral seal define an evacuated internal space which contains the cathode plate. The backplate is spaced behind the cathode plate to create a rearward vacuum space in which a getter is located.

Abstract: A Flat Panel Display apparatus has a spacing component composed of a ceramic material which creates an accurately controllable and variable compressive strain on prescribed critical areas of the inner surface of the display panel and backplane which strengthens the assembly and permits the use of thiner and lighter materials.

Abstract: An organic electroluminescent light emitting device comprises a hole injecting electrode, an electron injecting electrode and at least one organic layer between said electrodes. The electron injecting electrode is a film of an AlLi alloy formed by a sputtering technique. The AlLi alloy comprises 0.1 to 20 at % of lithium and contains as a subordinate component at least one of Cu, Mg and Zr in an amount of Cu: ≦10 wt % Mg: ≦5 wt % Zr: ≦0.5 wt % per the total sum of aluminum and lithium.

Abstract: An organic light-emitting device including a substrate; an anode disposed over the substrate; an organic light-emitting structure disposed over the anode; a cathode buffer layer disposed over the organic light-emitting structure and of a material selected to permit high energy deposition of a cathode; a cathode disposed over the cathode buffer layer; and an interfacial layer provided with an electron-injecting material between the organic light-emitting structure and the cathode buffer layer.

Abstract: Display device, in particular a PALC device, having a plasma space provided with a capsule (46) comprising getter material for supplying guest material to the plasma, e.g. H2, HD, D2. The capsule remains closed until the critical high temperature processing has been finished.

Abstract: Plasma display panel, is disclosed, having a top glass substrate, including sustain electrodes and scan electrodes formed on the top glass substrate arranged in parallel at fixed intervals, one pair of discharge electrodes formed in prescribed regions of the sustain electrodes and the scan electrodes projected in one direction respectively, for easy cell discharge, and a dielectric film and a protection film for protection of the sustain electrodes, the scan electrodes and the one pair of discharge electrodes, whereby allowing fabrication of a PDP with a high resolution.

Abstract: Discharge lamp includes a ceramic metal halide lamp having a central barrel enclosing a discharge space containing a fill gas and opposed end plugs which receive electrode lead-ins therethrough. A conductive ring is provided around each end plug, which is preferably polycrystalline alumina (PCA). These rings are connected by an antenna on the central barrel and thereby capacitively coupled to the lead-ins. The rings and the antenna are preferably sintered tungsten which is coated on the arc tube in paste form prior to sintering. When a voltage is applied across the electrodes, the resulting electric field causes the PCA to emit UV radiation which stimulates photoelectrons to initiate a discharge in the fill gas.

Abstract: A drift tube linear accelerator (DTL) incorporating an improved drift tube design, wherein the DTL comprises a resonance chamber maintaining a vacuum and having an inlet port and an exit port, an RF field source producing an oscillating radio frequency field within the chamber, and a plurality of substantially cylindrical drift tubes comprising a hollow body having a low energy end and a high energy end and housing a magnet, a low energy end cap attached to the low energy end of the hollow body and a high energy end cap attached to the high energy end of the hollow body, and a stem extending from said hollow body to an inner surface of the resonance chamber.

Abstract: In a high-frequency electronic ballast, a fluorescent lamp is connected with and powered by way of a series-resonant LC circuit. A resistive load is connected with the LC circuit, thereby to constitute a load therefor before ignition of the fluorescent lamp or in case the fluorescent lamp were to fail to ignite.

Abstract: A method for driving a plasma display is provided. The method includes the steps of (a) executing a reset discharge for all cells of the odd-numbered scanning line of the plasma display, (b) executing an addressing discharge for all cells of the odd-numbered scanning line, (c) executing a sustaining discharge for all cells of the odd-numbered scanning line, (d) executing a reset discharge for all cells of the even-numbered scanning line of the plasma display, (e) executing an addressing discharge for all cells of the even-numbered scanning line, and (f) executing a sustaining discharge for all cells of the even-numbered scanning line of the plasma display. The method is used to reduce the abrupt change of image brightness and the dynamic false contour of the image, and further improve the quality of the moving pictures.

Abstract: A method and apparatus are disclosed for the dimming control of a fluorescent lamp driven by an electronic ballast. A small portion (eg less than 15°) of the phase of the input supply voltage is removed, and the precise amount of the phase removed is used to generate a switching signal that controls the switching frequency of the electronic ballast and hence the light power output. The switching frequency is generated by producing pulses of a width proportional to the amount of phase removed, integrating the pulses to produce a voltage proportional to the phase removed, converting that voltage to a current that varies with a frequency depending on the voltage, and using that varying current to generate the switching frequency.

Abstract: A method for producing pulsed-voltage sequences for the operation of discharge lamps (8) by means of a pulsed discharge which is impeded dielectrically provides that the pulsed-voltage sequence is composed of two partial voltage sequences in such a manner that the magnitudes of the peak values of each partial voltage sequence are less than the magnitudes of the peak values of the resultant pulsed-voltage sequence, for example half as large. This has the advantage that correspondingly less EMI is generated when the partial-voltage sequences are produced. In addition, the two partial voltage sequences contain rising flanks of opposite gradient with respect to a reference-earth potential, the two partial voltage sequences preferably being inverted with respect to one another. This provides ideal complete compensation for the electromagnetic interference (EMI) produced by the two partial voltage sequences, at least locally.

Abstract: A gas discharge lamp and a method of operating the lamp is provided. The gas discharge lamp includes a lamp, a ballast for providing an AC voltage to the lamp and a frequency changer which selects an initial AC frequency at which the ballast provides the AC voltage and which changes the AC frequency to a second AC frequency, wherein the second frequency is higher than the initial frequency.

Abstract: A device for operating a gas discharge lamp (13) is proposed, having a power supply circuit which makes available an alternating voltage (UL) or an alternating current (IL) of a predetermined period duration (TP) for the supply of the gas discharge lamp (13) with predetermined electrical power. During an intended reduction of the mean lamp rating compared to the operation at normal rating, an increase of the instantaneous power is provided within a half period duration (TP/2) prior to the pole change of the alternating voltage (UL) or alternating current (IL). Preferably, the duration of the increase of the instantaneous power is a function of the period duration (TP). The device according to the invention for operating the gas discharge lamp (13) largely prevents the arc comprised in the gas discharge lamp (13) from going out during the pole-changing process and therefore ensures reignition following the pole-changing process.

Abstract: A gimbal drive module comprising an elbow (24) formed of composite material and having two legs. On one leg, elbow (24) includes an azimuth drive module (26). On the other leg, elbow (24) includes an elevation drive module (30). Azimuth drive module (26) and elevation drive module (30) include motors which when energized enable displacement of the respective legs in order to control the azimuth and elevation of elbow (24) to enable pointing of a structure, such as an antenna (18), as may be located on a second elbow outboard end (20).

Abstract: A bearing arrangement for a vibrating component having a bearing supported on a carrier for the vibrating component and having a damper which interacts with the carrier and has an inertial mass that is movable relative to the carrier by a damper drive. The damper drive being provided with a drive circuit which includes at least one first sensing element of the vibrating component and a downstream signal generator which generates two harmonic, out-of-phase first signals, whose frequencies correspond to each other and to vibrations of a machine part, as well as a second signal characterizing this frequency. The second signal is supplied to characteristic curve elements whose output signals are multiplied by the first signals of the signal generator, and the third signals obtained in this manner are added up in pairs. The signals obtained in this manner each are multiplied by a fourth signal, generated by a second sensing element, characterizing the relative movements of the carrier.

Abstract: A two-terminal motor can be connected to a two-line voltage supply network utilizing a controller in which a control element is in series with the current-measuring component and both are connected to a microcontroller.

Abstract: A device for determining a rotational number of an electric dc motor which drives a moving body of an automobile accessory such a sunroof, or a glass pane of a power window includes a switched capacitance filter for eliminating noise from the motor, a cutoff frequency of the switched capacitance filter being dependent on a clock input thereof; a pulse shaping circuit for generating a ripple pulse signal indicative of the rotational number of the motor by wave-shaping an output of the switched capacitance filter; and a pulse generating circuit providing an output pulse signal so as to establish a condition wherein the frequency of the ripple pulse signal is equalized to the cutoff frequency of the a switched capacitance filter.

Abstract: A conversion control part controls a converted DC voltage of a voltage converting part. The converted DC voltage is supplied to first and second amplifying parts each including a FET power transistor. At least one of first power transistors of first power amplifying parts and at least one of second power transistors of second power amplifying parts perform a full ON operation, thereby analoguely altering a current path from the converted DC voltage of the voltage converting part to plural-phase windings. This configuration reduces powerless and vibration of a motor.

Abstract: A movable barrier operator having improved safety and energy efficiency features automatically detects line voltage frequency and uses that information to set a worklight shut-off time. The operator automatically detects the type of door (single panel or segmented) and uses that information to set a maximum speed of door travel. The operator moves the door with a linearly variable speed from start of travel to stop for smooth and quiet performance. The operator provides for full door closure by driving the door into the floor when the DOWN limit is reached and no auto-reverse condition has been detected. The operator provides for user selection of a minimum stop speed for easy starting and stopping of sticky or binding doors.

Abstract: An electrical control system for an induction motor for achieving optimum efficiency at both full and partial loads at markedly reduced electrical components costs while maximizing reliability over the range of load, and for achieving a two step motor power output in a greatly simplified manner, the circuit having an electrical induction motor adapted for connection to line electrical power at maximum motor operating frequency, and to a second source of electrical power at approximately one half of the maximum operating frequency, wherein an electrical switch is provided for selectively connecting each power source to the motor, wherein the second source is a reduced frequency wave form generator for producing a reduced frequency wave form.

Abstract: Apparatus for charging a portable terminal in a radio-telephone system which allows a telephone conversation to be conducted while the portable terminal is being charged. In one embodiment, the charging apparatus includes an alternating current (AC) adapter for converting an AC power source voltage into a predetermined AC voltage, a rectifying circuit disposed within the portable terminal for rectifying the AC voltage provided from the AC adapter and converting the AC voltage into a direct current (DC) voltage, a charging circuit disposed within the portable terminal for receiving the DC voltage output from the rectifying circuit and charging a battery of the portable terminal with the DC voltage, and a charging current control circuit for controlling the amount of charging current applied to the battery.

Abstract: A power distribution system is provided for distributing power in a portable device being coupable to a charging system and including a main battery power and a bridge battery power. The charging system is coupled to a power bus through a diode. The main battery power system and the bridge battery system are also both coupled to the power bus through diodes. The predetermined voltage level is set with respect to the charging system, the main battery and the bridge battery, such that if all three are coupled to the bus, the recharging system both powers the unit and recharges the main battery. If the recharging system is removed, the main battery power system powers the portable device, and if the main battery power system is removed the bridge battery will provide power to the portable device.

Abstract: The present invention provides a cost-effective, accurate use of multiple batteries in a battery pack 110. The battery pack 110 consisting a plurality of battery cells 112. A monitoring circuit 117, 217, 317 is provided that monitors the battery cells 112. The monitoring circuit 117, 217, 317 is connected to a microprocessor 119 through an analog-to-digital converter 114. The microprocessor 119 determines the amount of voltage remaining in the battery cells 112. The microprocessor 119 also monitors the voltage output from the battery pack 110. When the voltage being supplied by the battery pack 110 falls below a threshold value, a switching circuit 121, 221, 321 switches depleted battery cells 112 with charged battery cells 112.

Abstract: A compact, economical and fast battery charger for Ni-CAD and Ni-MH batteries turns a current source into a controlled voltage source which keys off a signal representative of the voltage level of the battery during the charging process and turns the current source ON and OFF to assure that the battery during the charging process does not exceed a given voltage level. The apparatus includes in par a ballasting resistor in series with the battery to compensate for the low resistance of the battery and an open collector voltage comparator which establishes high and low voltage set points for turning the current source ON and OFF at the appropriate times. The method and apparatus includes a visual display responsive to a signal which produces on the visual display an indication of the state of charge of the battery during a charging cycle. A circuit board has a long U-shaped trace extending around a notch in the board, on each side of each is mounted on battery.

Abstract: A method and apparatus for rapid charging a battery that compensates for sub-optimal interconnection between the charger and the battery. In the present invention the effect of an imperfect interconnection between a charger and a battery is empirically characterized. The elements of the imperfect interconnection include any resistive losses between the battery charger output and the battery cells. The battery charger incorporates a control loop that measures the current flowing into the battery and the voltage at the interconnect terminals. The control loop then calculates the voltage at the actual batteries based on the measured values and the predetermined interconnect characterization. The control loop uses the calculation to adjust the output of the charger to achieve the optimal voltage at the batteries. The result of optimizing the charging voltage is a significant charge time reduction.

Abstract: A secondary battery needs to be protected by an inexpensive structure having a small number of components. To this end, the structure includes a fuse 41 with a heater, connected to a positive electrode side of a battery cell 2, as a secondary battery, a driving FET 42 for driving the heater of the fuse 41 and a detection control IC 3 which, on detecting at least the over-charging state of the battery cell 2, drives the driving FET 42 to fuse the heater of the fuse 41.

Abstract: A periodic time-varying current with smallest period 1/f1 excites a cell/battery and provides a timing reference. Linear circuitry produces two signals, one proportional to the excitation current, the other proportional to the responding time-varying voltage. These signals are processed with identical frequency-limiting filters to attenuate higher-order harmonics and noise. Using the timing reference for synchronization, a microprocessor/microcontroller commands analog to digital converters to sample the frequency-limited current and voltage signals at equally-spaced times over a period and accepts the digitized samples as inputs. The digital samples are averaged over multiple periods and employed to calculate averaged Fourier coefficients of in-phase and quadrature components of frequency-limited current and voltage at frequency f1.

Abstract: A method of controlling a load dependent upon at least one predetermined condition includes determining a presence of the at least one predetermined condition with at least one sensor. A signal is transmitted from the at least one sensor to an electrical processor dependent upon whether the at least one predetermined condition is present. A switch device is controlled with the electrical processor dependent upon the signal from the at least one sensor. The switch device has a first state in which the switch device connects a power source to the load, and a second state in which the switch device connects the power source to the at least one sensor, to the electrical processor and to a rechargeable energy storage device. If the predetermined condition is not present, the switch device is maintained in the second state. If the predetermined condition is present, the switch device is cyclically and continuously switched between the first state and the second state.

Abstract: A power supply controlling integrated circuit device have detection input terminals for receiving the voltages of a plurality of cells and a plurality of comparing means for comparing the voltages of the individual cells with a predetermined reference voltage. To control discharging or charging of the cells in accordance with the outputs of the comparing means, a mode terminal is provided for receiving a signal for designating the number of cells. Also provided are a first circuit that can forcibly bring part of the comparing means into a predetermined output state in accordance with the signal received at the mode terminal and a second circuit for excluding from monitoring the outputs of those comparing means which have been brought into the predetermined output state. This enables the power supply monitoring integrated circuit device to control different numbers of cells without requiring any separately-mounted component or the like.

Abstract: A lead acid battery life extender for the battery of an internal combustion engine includes a multivibrator circuit electrically connected across the terminals of the battery for delivering high frequency electrical pulses to the battery, thereby removing lead sulfate from the plates of the battery and increasing the life of the battery, and a thermoelectric power source for providing electrical energy to the multivibrator circuit, thermally coupled to heat emitted from the internal combustion engine and electrically connected to the multivibrator circuit.

Abstract: The charging method includes providing a current to the battery pack, sensing battery temperature, determining temperature change rate, and disabling termination of the charging method based on a temperature-based scheme if the temperature change rate exceeds a first predetermined threshold within a first predetermined period of time. Termination of the charging method based on a temperature-based scheme may be re-enabled if the temperature change rate is less than a second predetermined threshold. Preferably the second predetermined threshold is equal to the first predetermined threshold. Alternatively, termination of the charging method based on a temperature-based scheme may be re-enabled after a second predetermined period of time has elapsed.

Abstract: A series compensation generator SCG is installed in a transmission line that links various substations SS and the transmission capability of the system as a whole can be increased by regulating the equivalent reactance of the transmission line. Series compensation generator SCG generates a voltage of which the phase angle is shifted substantially 90° in relation to the current flowing in the transmission line, and it also generates a voltage that compensates the voltage drop due to the equivalent reactance. Also, when an electrical fluctuation phenomenon (power oscillation) occurs in the transmission line, it is possible speedily to suppress the power oscillation by detecting the power fluctuation of the transmission line and controlling the compensating voltage of series compensation generator SCG so that it suppresses that power fluctuation.

Abstract: An AC voltage reduction system and method providing highly efficient reduction of utility voltage with minimal electromagnetic interference is provided. The systems and methods may also be used to improve overall facility power factor. The AC voltage provided to a load, such as a group of lighting ballasts connected on a single circuit, is reduced by a controllable switch coupled in parallel with a capacitor between the AC source and the load. The switch is controlled to turn-on when the voltage across the capacitor is very close to zero and turn-off prior to the next zero-crossing of the line current. The turn-off time is selected in an open loop configuration independently of a measured characteristic of load voltage or watts. In order to provide proper operation of gas discharge lighting, the switch is initially turned off just in advance of the AC source current zero-crossing.

Abstract: A rail tracking system and method for providing precise tracking of voltage levels to a dual supply voltage Integrated Circuit. A switch mode DC—DC voltage regulator is used to derive the lower of the two voltage levels from the higher level. The switch mode regulator employs a pulse width modulator (PWM) to derive the lower voltage level. A separate supply source is utilized to power the PWM and the timing of the supply voltage is such that the PWM has reached steady state before the higher voltage level is provided to the regulator.