Abstract: A piezoelectric resonator element, comprises: a base made of a piezoelectric material; at least a pair of resonating arms provided in a unified manner with the base and extending in parallel with each other from the base; a portion defining a long groove provided to each of the resonating arms along a longitudinal direction; and a driving electrode provided to the long groove. Each of the resonating arms includes a structure to adjust hardness balance between right and left structures with respect to a virtual central line extending in the longitudinal direction.

Abstract: A restrained surface wave resonator with reduced or abated acceleration sensitivity is provided with a stiffening layer, adhesive layers and subsurface horizontal indentations on the substrate to achieve reduced acceleration sensitivity, increased structural rigidity, decreased sensitivity to in-plane deformations, a lightweight device and reduced deleterious effects from environmental shocks and vibration. The substrate of the restrained surface wave resonators features multiple subsurface horizontal indentations in one major substrate surface deposited on a stiffening layer to provide improved structural rigidity against flexure caused by normal acceleration based upon the diminished mass and reduced weight resulting from removal of portions of the substrate subsurface through micro-machining, and it also tends to improve excessive sensitivity to other flexural deformations. The present invention encompasses a restrained surface wave resonator device and a restrained surface wave resonator system.

Abstract: A sealing arrangement of a piezoelectric actuator comprises terminal posts (14) projecting from the piezoelectric actuator and a metallic top arrangement (18, 22), provided with openings (28) allowing the passage of the terminal posts (14) which is emplaced on the piezoelectric actuator. In order to facilitate reliable sealing in particular also for comparatively thin top plates (18), the invention provides for emplacing on terminal post sections (30) projecting from the openings (28) a sealing element (32) which is formed from an electrically insulating and sealing material and which is positioned tight against, on the one hand, circumferential areas (34) of the terminal post sections (30) and, on the other hand, the top arrangement (18, 22), with an insulating disk (40) provided with openings allowing the passage of the terminal posts (14) and made of electrically insulating material being located between the sealing element (32) and the top arrangement (18, 22).

Abstract: A renewable energy electric power generating system consisting of Renewable Energy Wave Pumps, located under water, anchored to the sea bed, auto regulating to variable sea elevations and undulation heights, efficient, simple construction and resistant to storms, operate by using the law of conservation of energy to change, a large quantity of water at low head found in a surface undulation, into a lower water quantity at a much higher head, collecting this high head water into a piping network and a common header anchored to the sea bed, provided with a stand pipe and reservoir, and feeds directly into a hydro-turbo generator located on or off shore to produce renewable cheap electric power with zero emissions and independent of oil prices, optimizing land use for power plants, and providing a navigation-safe and a free Floating Break Water Structure for shore line protection

Abstract: An acoustic resonator assembly includes a layer of high-acoustic-impedance material and a layer of low-acoustic-impedance material made of a low-electrical-permittivity material. This assembly may support the resonator over an interconnect layer or act as a decoupling assembly between two active elements of the resonator. The assembly may alternatively include three low-acoustic impedance layers. Alternatively, the assembly may include three acoustic impedance layers wherein two of the layers are low acoustic impedance layers and the third layer has a higher acoustic impedance than the first two or alternatively is a high-acoustic impedance layer.

Abstract: A heat-dissipating fan includes a casing, a stator, and an impeller. The casing includes a base supported by a plurality of ribs. The base includes an axial tube for receiving a bearing through which a shaft extends. Vanes are provided on an outer circumferential wall of the impeller. An end of the shaft is fixed to an axial seat at a center of the impeller. A magnetic member is mounted to the other end of the shaft. The magnetic member and the impeller rotate synchronously under magnetic induction. When the heat-dissipating fan is mounted on top of a heat-dissipating device, a propeller of the heat-dissipating device is driven to turn synchronously under magnetic attraction. When air currents are driven by the vanes to flow downward, great noise resulting from tangential wind effect is avoided, as the ribs are not in the air inlet area.

Abstract: A crystal unit includes: a crystal blank in which a depression which function as a vibration region is formed; first and second excitation electrodes formed on both principle surfaces, respectively, of the crystal blank in the vibration region; first and second extending electrodes provided so as to extend from the first and second excitation electrodes, respectively, toward the outer periphery of the crystal blank; and a receptacle body. Bonding of the first extending electrode with eutectic alloy at one point of the outer periphery of the crystal blank electrically and mechanically connects the crystal blank to the receptacle body with the one point as the fixed end. The second extending electrode extends as far as the position of the fixed end and is electrically connected to the receptacle body by wire bonding at the position of the fixed end.

Abstract: A built-in motor type spindle device comprising a housing and a spindle, wherein said spindle device further includes static pressure bearings which support the spindle so that the spindle can rotate freely relatively to the housing, two lines of magnetic field generating members which are provided on the spindle, and two pairs of coils which are provided on the housing and respectively face the magnetic field generating members and since the spindle device circumferentially disperses the which magnetic field generating members generate heat, the spindle device can prevent the spindle from being hot locally and further, since the surface area of the magnetic field generating members on the spindle are made larger, they can be cooled more effectively than one line of magnetic field generating members.

Abstract: A rotor of an outer rotor type motor is coupled to an outside of a stator, and is provided with a shaft coupler, for being connected with a shaft of a drum, fixed at its center portion by an injected material, and a plurality of radiation holes formed therein continuously in a radial direction. The rotor includes at least one cooling fin provided with a base member fixed to a bottom surface of the rotor and a curved member attached to the base member, wherein the cooling fin is combined with the bottom surface so as to be disposed adjacent to the radiation hole. Therefore, a contact area with air can be increased, and an air circulation through the radiation holes can be facilitated. Accordingly, deterioration of the efficiency of a washing machine is prevented despite long periods of operation, and any damage caused by overheating is prevented.

Abstract: A wind turbine, having: a rotatable frame; a plurality of airfoils mounted to the rotatable frame, the wherein the airfoils extend parallel to an axis of rotation of the rotatable frame, and wherein the airfoils are individually pivotable with respect to the rotatable frame; and a mechanism that holds each of the airfoils in a high lift/high drag position when the airfoil moves in a direction of air flow. The wind turbine may optionally include a rotational stop to prevent rotation of the air foil from a high drag position to a low drag position when the airfoil is moving in the direction of the wind flow.

Abstract: A throttle body assembly including an end plate. The throttle body assembly includes a housing having an inner wall, and a motor located within the housing. The motor end plate is coupled to the motor and is in contact with the inner wall of the housing. The end plate includes an outer edge having at least one protrusion extending therefrom. The contact between the end plate and the housing is substantially only between the at least one protrusion on the outer edge of the end plate and the inner wall of the housing.

Abstract: A system for generating updated reactive capability curves of a generator operates the genarator at a number of operating load levels and at a number of different power factors to collect data regarding the real and reactive power generated at each of the various operating load levels and power factors. Subsequently, the system analyzes the collected data to determine an actual reactive capability curve of the generator. The system also provides generator health monitoring and identifies changes and trends in the capability curves of the generator. The updated reactive capability curves may be used by an economic dispatch program in determining optimum MW and MVAR setpoints for the generator.

Abstract: A dynamoelectric machine comprises: a stator that comprises a plurality of stator poles arranged around a stator surface of revolution with a stator axis for the stator surface of revolution; at least one rotor that comprises a plurality of permanent rotor magnets arranged around a rotor surface of revolution with a rotor axis for the rotor surface of revolution that is coincident with the stator axis and with the rotor surface of revolution adjacent the stator surface of revolution; a drive shaft with a drive shaft axis of rotation that is substantially coincident with the stator axis coupled to the rotor for rotating the rotor relative to the stator about the drive shaft axis of rotation; and a at least one actuator for axially displacing the rotor surface of revolution along the drive shaft relative to the stator surface of revolution to change magnetic flux interaction between the stator poles and the rotor magnets; wherein at least one of the surfaces of revolution tilts with respect to the drive shaft a

Abstract: A device for handling and recovering of kinetic energy in a fluid is presented which basically features a bladed impeller (11). The impeller is operated by an electric engine (12) and acts as a centrifugal blower yielding energy to the air when the main engine is in a low boost phase; otherwise in case of excessive boost pressure, the impeller receives the moving fluid which will drive its rotation, reducing pressure and absorbing the energy to operate the electric engine (12) which will act as a reversible electric machine, thus generating electric power.

Abstract: The present invention provides a piezoelectric ultrasonic motor driver which can perform self-oscillation, adjust the rotational direction of the motor, and be easy to manufacture. The motor includes a metal body having a desired shape; a plurality of piezoelectric plates attached to surfaces of the metal body, contracted and expanded to rotate the metal body; a self-oscillation unit for oscillating at an electromechanical frequency of the piezoelectric plates an electrical signal; and a delay unit for delaying an oscillation signal of the self-oscillation unit in phase by 90 or ?90 degrees according to a desired rotational direction.

Abstract: The present invention concerns a wind power installation comprising a pylon and a pod arranged at the tip of the pylon. The invention further concerns a method of controlling such a wind power installation. In order to prevent a fire from occurring or at least to be able to rapidly extinguish a fire which has occurred, there is provided a first apparatus for producing an inert atmosphere.

Abstract: An electrical generator system includes a source for producing heated gases, a conduit connected to the source for receiving a flow of the heated gases, and a generator assembly positioned in close proximity to the conduit. The generator assembly includes a plurality of magnets positioned in a spaced relationship, the plurality of magnets producing a magnetic field. At least one electrical conductor is positioned adjacent the plurality of magnets to conduct an electrical current generated in response to the flow of heated gases in the conduit and the magnetic field.

Abstract: A positioning apparatus including a movable member having a plurality of magnets, and a plurality of coils arranged in X- and Y-axial directions, for displacing the movable member in the X- and Y-axial directions, and in a rotational direction around the Z-axis.

Abstract: An electrical machine having a magnet assembly with a magnet carrier ring with an even number of permanent magnets mounted in the carrier ring around a circular locus, and a conductor assembly with one or more conductor circuits wound in a double helix wave winding around a flat conductor support ring with the conductor circuits having uniformly curved conductor segments of involute or arcuate configuration wherein the magnet assembly and conductor assembly are contained in a housing with the magnet assembly rotating relative to the conductor assembly.

Abstract: An ultrasonic motor drive device capable of prolong the service life of an ultrasonic motor by preventing the motor from being unstably operated when the motor is driven at a lower speed of at least two speeds. When the ultrasonic motor (3) is driven at a rather low speed in normal driving, the motor can be prevented from being unstably operated by its driving at a rather low speed by driving the motor at a rather high speed for each specified interval. Thus, the service life of the ultrasonic motor can be increased.