Abstract:
The invention relates to devices that produce displacements and/or forces (defined as actuators), when a magnetic field source(s) is (are) placed in such a way that the resulting magnetic field is of suitable strength and orientation in relation to the actuating element made from a Magneto-Mechanical Adaptive (MMA) material, so as to produce the desired displacement of the MMA element; or to devices that dampen mechanical vibrations by absorbing the vibration energy into an MMA element and/or by converting the vibration energy into electric power in the device and/or senses displacement, velocity or acceleration. The electric energy can be dissipated to heat or led out from the device. In the latter case, the device works as a power generator. The principle of using the devices as sensors is also described. The MMA material here is defined as a material whose dimensions change when a magnetic field or stress is applied to it, based on twin boundary or austenite-martensite phase boundary motion or magnetostriction.
Abstract:
In a resonating assembly (30, 130, 230), a beam (34, 134) having a pickup (36, 136) thereon is positioned proximate to a magnet (46, 146) which passes across the pick up at a predetermined frequency. The passage of the magnet across the pick up establishes an alternating magnetic field that in turn causes the beam and pick up to vibrate. A blade (48, 148) is mounted on the beam and vibrates therewith so that when the blade is brought into engagement with a layer of sheet type work material (16) the vibratory amplitude of the blade causes the blade to cut through the material as it is moved in engagement therewith.
Abstract:
The invention utilizes a multiple frequency ultrasound generator (12) driving a multiple frequency harmonic transducer (17, 18, 19 ) to improve cleaning and processing effects while eliminating damage to parts being cleaned. An AC switch and circuitry to modify the output of an ultrasound generator in combination with techniques such as random AM and FM signals are used to produce ultrasound waves that have no single frequency components which eliminates exciting parts being cleaned into resonance.
Abstract:
An electrical/mechanical/sound converter capable of stable operation when used in a mobile terminal such as a cellular phone to generate vibration for indicating an incoming call. The electrical/mechanical/sound converter comprises a housing (1a), and a detector coil (11) provided near a moving part (2) forming a magnetic circuit fitted with a suspension (3) into an opening in the housing (1a) to generate an excitation voltage from the vibration of the moving part (2). The electrical/mechanical/sound converter allows the detector coil (11) to detect strong vibrations of the moving part (2) in resonance as excitation voltage and feed it back, and provides extremely steady vibration even if the resonance frequency changes with variations in ambient temperature, etc.
Abstract:
An annunciator capable of annunciating by means of both sound and vibration, which is provided with an annunciating unit (2) equipped with a first vibrating body which generates acoustic waves when the body is driven at an audible frequency by means of a first actuating signal and a second vibrating body which generates bodily sensible vibrations when the body is driven at a low frequency of several 100 Hz or lower by means of a second actuating signal and connected to an annunciating signal generating circuit (5) through a switch (59). The annunciating signal generating circuit (5) is equipped with a signal generating circuit (57) for sound which generates the intermittent first actuating signal that is repeatedly turned on and off at regular time intervals, a signal generating circuit (58) for vibration which generates the intermittent second actuating signal that is repeatedly turned on and off at regular time intervals, and a synchronous circuit (56) which shifts the turning-on periods of the first and second driving signals generated from the circuits (57) and (58) from each other. This constitution can prevent the abrupt increase of the power consumption of the annunciator.
Abstract:
This invention deals with a portable terminal that reduces extraneous tones in a portable terminal in which is mounted an electromagnetic induction actuator that produces voice signals, a buzzer signal or a low frequency vibration. By short-circuiting the terminal fittings of the electromagnetic induction actuator or by connecting them electrically to amplifiers or to a signal generator that produces a constant voltage signal or a constant-frequency signal, the extraneous tone produced by vibration of the mechanical vibration system of the actuator is reduced.
Abstract:
PURPOSE: To provide a bodily sensitive oscillation type annunciator without making user surprised by a bodily sensitive oscillation and capable of increasing the annunciation power. CONSTITUTION: The bodily sensitive oscillation type annunciator is activated over the incoming time of an incoming signal C, and is provided with an oscillation intensity gradually increasing control circuit 2 repeating an operation of ascendingly increasing a drive voltage V to be supplied to an oscillation motor 1 which gradually increases from a minimum oscillation intensity voltage value v1 to a maximum oscillation intensity value v6. This circuit 2 has a resistance voltage dividing circuit 2a which generates each of oscillation intensity voltage values v1 to v6 from the minimum oscillation intensity voltage value v1 to the maximum oscillation intensity voltage value v6 based on a power supply voltage VD and a voltage value ascending change-over circuit 2b which selects each of oscillation intensity voltages v1 to v6 every certain period t in ascending order and outputs them.