Abstract: A jet generating device includes a vibrating member which vibrates gas, a driving unit which drives the vibrating member, and a housing which has a first opening and a first chamber connected to the first opening and containing the gas. The housing supports the vibrating member, and is such that, of sounds generated as a result of vibrating the vibrating member, the sound having a maximum noise level has a predetermined frequency. In addition, the housing discharges the gas as pulsating gas through the first opening as a result of driving the vibrating member.

Abstract: A working vehicle in which engine speed can be easily varied by operation of a speed change pedal, and in which an acceleration arm of a governor of an engine and the speed change pedal can be connected in a simple manner to reduce production costs easily. The working vehicle has the engine mounted on a traveling body having traveling wheels, a hydraulic stepless transmission for transmitting power from the engine, and the speed change pedal for increasing and decreasing output speed of the transmission. A speed return mechanism and the acceleration arm are connected via an interlocking mechanism.

Abstract: A jet generating device includes a housing having an opening and containing gas therein, a vibrating member which is supported by the housing so that the vibrating member is capable of vibrating and which vibrates the gas to discharge the gas as pulsating gas through the opening, a driving mechanism for driving the vibrating member in accordance with an electrical signal, and a drive controller which generates the electrical signal at a fundamental frequency at which an input impedance of the driving mechanism is substantially a maximum and which outputs the generated electrical signal to the driving mechanism.

Abstract: Disclosed is a light-emitting device. The light-emitting device includes an EL layer and a heat dissipation layer. The EL layer includes a first semiconductor layer, a second semiconductor layer, and an active layer, the first semiconductor layer having a first conductivity type that is one of n type and p type, the second semiconductor layer having a second conductivity type that is opposite to the first conductivity type, the active layer being provided between the first semiconductor layer and the second semiconductor layer. The heat dissipation layer has the first conductivity type and is bonded to a side of the EL layer closer to the second semiconductor layer than the first semiconductor layer.

Abstract: Provided is a vibrating device which can generate efficient vibrations in a vibrating member and efficiently apply vibrations to a gas, a jet flow generating device in which the vibrating device has been implemented, and an electronic device in which the jet flow generating device has been implemented. A jet flow generating device 10 has a vibrating device 15 including a frame 4, and actuator 5 mounted on the frame 4, and a vibrating member 3 supported on the frame 4 by an elastic supporting member 6. The vibrating member 3 has a side plate 3b formed on the perimeter portion of a disc-shaped vibrating plate 3a, for example. Vibration of the vibrating member 3 applies vibrations to air within chambers 11a and 11b, whereby gas can alternatingly be blown from nozzles 2a and 2b.

Abstract: A jet generator includes a casing containing a gas and having an opening, vibrators attached to the casing, and actuators for actuating the vibrators. The vibrators vibrate with the vibrational forces thereof being synthesized so as to attenuate each other, thereby vibrating the gas to eject a pulsating jet thereof through the opening.

Abstract: A jet generating device includes a vibrating member which vibrates gas, a driving unit which drives the vibrating member, and a housing which has a first opening and a first chamber connected to the first opening and containing the gas. The housing supports the vibrating member, and is such that, of sounds generated as a result of vibrating the vibrating member, the sound having a maximum noise level has a predetermined frequency. In addition, the housing discharges the gas as pulsating gas through the first opening as a result of driving the vibrating member.

Abstract: A jet generating device includes a housing having an opening and containing gas therein, a vibrating member which is supported by the housing so that the vibrating member is capable of vibrating and which vibrates the gas to discharge the gas as pulsating gas through the opening, a driving mechanism for driving the vibrating member in accordance with an electrical signal, and a drive controller which generates the electrical signal at a fundamental frequency at which an input impedance of the driving mechanism is substantially a maximum and which outputs the generated electrical signal to the driving mechanism.

Abstract: The present invention is directed to a capacitor apparatus of the capacity variable type. This capacitor apparatus is manufactured by Micro Electro-Mechanical System technology, and comprises an insulating substrate (2) in which at least two capacitor electrodes (3), (4) are formed on one surface (2a) in the state where they are insulated each other, an actuator (5) formed by insulating material and having an external shape to bridge over the respective capacitor electrodes (3), (4), the actuator (5) being such that a conductor which respectively constitutes capacitors between the conductor (6) and these capacitor electrodes (3), (4), and drive means (7) for allowing this actuator (5) to undergo an operation to come into contact with one principal surface (2a) of the insulating substrate (2) or to become away therefrom.

Abstract: The present invention is directed to a capacitor apparatus of the capacity variable type. This capacitor apparatus is manufactured by Micro Electro-Mechanical System technology, and comprises an insulating substrate (2) in which at least two capacitor electrodes (3), (4) are formed on one surface (2a) in the state where they are insulated each other, an actuator (5) formed by insulating material and having an external shape to bridge over the respective capacitor electrodes (3), (4), the actuator (5) being such that a conductor which respectively constitutes capacitors between the conductor (6) and these capacitor electrodes (3), (4), and drive means (7) for allowing this actuator (5) to undergo an operation to come into contact with one principal surface (2a) of the insulating substrate (2) or to become away therefrom.

Abstract: The present invention is directed to a capacitor apparatus of the capacity variable type. This capacitor apparatus is manufactured by Micro Electro-Mechanical System technology, and comprises an insulating substrate (2) in which at least two capacitor electrodes (3), (4) are formed on one surface (2a) in the state where they are insulated each other, an actuator (5) formed by insulating material and having an external shape to bridge over the respective capacitor electrodes (3), (4), the actuator (5) being such that a conductor which respectively constitutes capacitors between the conductor (6) and these capacitor electrodes (3), (4), and drive means (7) for allowing this actuator (5) to undergo an operation to come into contact with one principal surface (2a) of the insulating substrate (2) or to become away therefrom.

Abstract: The present invention is directed to a capacitor apparatus of the capacity variable type. This capacitor apparatus is manufactured by Micro Electro-Mechanical System technology, and comprises an insulating substrate (2) in which at least two capacitor electrodes (3), (4) are formed on one surface (2a) in the state where they are insulated each other, an actuator (5) formed by insulating material and having an external shape to bridge over the respective capacitor electrodes (3), (4), the actuator (5) being such that a conductor which respectively constitutes capacitors between the conductor (6) and these capacitor electrodes (3), (4), and drive means (7) for allowing this actuator (5) to undergo an operation to come into contact with one principal surface (2a) of the insulating substrate (2) or to become away therefrom.

Abstract: A fuel-cell device according to the present invention includes a fuel-cell unit having a first and second flow channels and a cell for generating an electromotive force with the use of gases circulating in the first and second flow channels, and a gas-injecting unit disposed adjacent to the fuel-cell unit and injecting air into the first flow channel in the form of a pulsating flow. With this structure, the gas-injecting unit injects air into the first flow channel in the form of a pulsating flow to supply the air to the cell. When a vibrating plate is used as means for injecting the gas from the gas-injecting unit, the fuel-cell device can be low-profiled. In addition, boundary layers of air that are easily formed in the first flow channel or the retained air can be agitated to improve the power generation efficiency.

Abstract: The present invention is directed to a capacitor apparatus of the capacity variable type. This capacitor apparatus is manufactured by Micro Electro-Mechanical System technology, and comprises an insulating substrate (2) in which at least two capacitor electrodes (3), (4) are formed on one surface (2a) in the state where they are insulated each other, an actuator (5) formed by insulating material and having an external shape to bridge over the respective capacitor electrodes (3), (4), the actuator (5) being such that a conductor which respectively constitutes capacitors between the conductor (6) and these capacitor electrodes (3), (4), and drive means (7) for allowing this actuator (5) to undergo an operation to come into contact with one principal surface (2a) of the insulating substrate (2) or to become away therefrom.

Abstract: The present invention is directed to a capacitor apparatus of the capacity variable type. This capacitor apparatus is manufactured by Micro Electro-Mechanical System technology, and comprises an insulating substrate (2) in which at least two capacitor electrodes (3), (4) are formed on one surface (2a) in the state where they are insulated each other, an actuator (5) formed by insulating material and having an external shape to bridge over the respective capacitor electrodes (3), (4), the, actuator (5) being such that a conductor which respectively constitutes capacitors between the conductor (6) and these capacitor electrodes (3), (4), and drive means (7) for allowing this actuator (5) to undergo an operation to come into contact with one principal surface (2a) of the insulating substrate (2) or to become away therefrom.

Abstract: A jet flow generating apparatus that suppresses noise as much as possible and effectively radiates the heat generated by a heat generating member, an electronic device that is equipped with the jet flow generating apparatus, and a jet flow generating method are provided. According to the present invention, a jet flow generating apparatus comprises a plurality of chambers each having an opening and each containing a coolant, a vibrating mechanism for vibrating the coolant contained in each of the plurality of chambers so as to discharge the coolant as a pulsating flow through the openings, and a control unit for controlling the vibration of the vibrating mechanism so that the sound waves generated by the coolant discharged from the plurality of chambers weaken each other.

Abstract: The present invention is directed to a capacitor apparatus of the capacity variable type. This capacitor apparatus is manufactured by Micro Electro-Mechanical System technology, and comprises an insulating substrate (2) in which at least two capacitor electrodes (3), (4) are formed on one surface (2a) in the state where they are insulated each other, an actuator (5) formed by insulating material and having an external shape to bridge over the respective capacitor electrodes (3), (4), the actuator (5) being such that a conductor which respectively constitutes capacitors between the conductor (6) and these capacitor electrodes (3), (4), and drive means (7) for allowing this actuator (5) to undergo an operation to come into contact with one principal surface (2a) of the insulating substrate (2) or to become away therefrom.

Abstract: The present invention is an antenna apparatus attached to an electronic device and includes an antenna section (11) having an antenna element (18) provided with two or more power supply points (19) and two or more earth points (20); and an earth point switch (21) which is provided correspondingly to each earth point (20) and connects or disconnects the earth point (20) from a ground. Selectively turning on or off the earth point switch (21) selects the earth point to adjust the resonance frequency.

Abstract: The present invention is directed to a capacitor apparatus of the capacity variable type. This capacitor apparatus is manufactured by Micro Electro-Mechanical System technology, and comprises an insulating substrate (2) in which at least two capacitor electrodes (3), (4) are formed on one surface (2a) in the state where they are insulated each other, an actuator (5) formed by insulating material and having an external shape to bridge over the respective capacitor electrodes (3), (4), the actuator (5) being such that a conductor which respectively constitutes capacitors between the conductor (6) and these capacitor electrodes (3), (4), and drive means (7) for allowing this actuator (5) to undergo an operation to come into contact with one principal surface (2a) of the insulating substrate (2) or to become away therefrom.

Abstract: The present invention is an antenna apparatus attached to an electronic device and includes an antenna section (11) having an antenna element (18) provided with two or more power supply points (19) and two or more earth points (20); and an earth point switch (21) which is provided correspondingly to each earth point (20) and connects or disconnects the earth point (20) from a ground. Selectively turning on or off the earth point switch (21) selects the earth point to adjust the resonance frequency.