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| Number | Title | Issue Date |
| 4297602 | Magnetostrictive co-ordinate plate for co-ordinate reader A co-ordinate plate for a co-ordinate reader, which utilizes delays of oscillation waves in a magnetostrictive material. The co-ordinate plate is composed of two sheets of magnetostrictive material, which have a common co-ordinate plane and an acousticall... | 10/27/1981 |
| 4296486 | Shielded electromagnetic acoustic transducers Disclosed is an electromagnetic acoustic transducer, including a source of magnetic flux for establishing a static magnetic field, an electrical conductor for conducting an alternating current in the static magnetic field, and an electrically conductive, ... | 10/20/1981 |
| 4289987 | Magnetostrictive non-contacting pressure detection system A system including a sensor and electronic instrumentation for measuring fission gas pressures inside a pressurized system or device or the like, such as a nuclear fuel rod. The system is based primarily on what is commonly known as the Villari effect whi... | 09/15/1981 |
| 4281987 | Ultrasonically driven low-speed rotary motor A device using longitudinal ultrasonic vibrations for rotating a shaft at relatively low rotational speeds is particularly useful for rotating a brush-type tooth polisher on an insert for an ultrasonic dental prophylaxis unit. The device has a sleeve whic... | 08/04/1981 |
| 4257022 | Magnetostrictive rod filters Magnetostrictive rod filter whose attenuation versus frequency curve has a resonance as the conventional magnetostrictive rod filters but also a pole at a frequency near the resonance frequency. The filter comprises a freely vibrating magnetostrictive rod... | 03/17/1981 |
| 4253704 | Method and apparatus for disintegrating a material A method for disintegrating a material comprises acting on the material being disintegrated with shock waves produced upon applying individual electromagnetic field pulses to a current-conducting element arranged in a close proximity to the material being... | 03/03/1981 |
| 4225803 | Apparatus for removing material coatings from interior surfaces of containers The invention concerns an improved apparatus for removing interior material coatings in various containers such as sanitary bowls. The apparatus may be partially or completely immersed or introduced into liquid in a container to be cleaned and due to an i... | 09/30/1980 |
| 4220885 | Tuning fork mounting with damping means A tuning fork wherein a tuning fork vibrator is supported on a damping member mounted in a housing and having such characteristics that it will cancel the (1/2)f0 of spurious response of the tuning fork vibrator without impeding the normal vibr... | 09/02/1980 |
| 4209759 | Magnetoelastic surface wave interaction device The invention relates to an interaction device comprising a non-magnetic substrate, a thin easy-plane magnetic layer, two piezoelectric transducers arranged at the ends of the magnetic layer and respectively receiving the two electrical signals to be trea... | 06/24/1980 |
| 4199737 | Magnetostatic wave device A magnetostatic wave device for microwave signal processing which includes an input or output transducer finger arrangement which allows shaping of the device response. Two sets of interdigitated fingers are connected to receive the same microwave input s... | 04/22/1980 |
| 4161665 | Magnetostrictive engine detonation sensor A sensor for engine vibrations at a predetermined frequency characteristic of detonation comprises a housing adapted at one axial end for attachment to an internal combustion engine, a magnetostrictive element axially compressed in said housing with a sou... | 07/17/1979 |
| 4160232 | Low frequency dipole hydrophone transducer A dipole hydrophone transducer which includes first and second magnetostrictive arms and associated windings. One arm includes a radiation target for acoustic energy for production of proportional signals in the windings and the other arm includes a count... | 07/03/1979 |
| 4160231 | Low frequency dipole hydrophone transducer A dipole hydrophone which includes a radiation target for acoustic energy and a counterbalancing mass. A first multilaminar magnetostrictive arm is connected to the radiation target at its center gravity and a second multilaminar magnetostrictive arm is s... | 07/03/1979 |
| 4158368 | Magnetostrictive transducer Improved magnetostrictive materials are combined in a novel arrangement to provide a transducer of the electromechanical type particularly suited for the precise control of fluid flow. An embodiment according to this invention comprises a valve assembly h... | 06/19/1979 |
| 4151432 | Production of ferrites for magnetostrictive vibrators A ferrite for magnetostrictrive vibrators is produced by the simple process of press forming a preformed structure formed from starting powder of magnetite or a mixture of magnetite and ferric oxide, said powder having an average particle size d (μ) of f... | 04/24/1979 |
| 4139806 | Acoustic driving of rotor Sound waves are utilized to apply torque to a body in an enclosure of square cross section, by driving two transducers located on perpendicular walls of an enclosure, at the same frequency but at a predetermined phase difference such as 90°. The torque i... | 02/13/1979 |
| 4137470 | Magnetostrictive elastic surface wave structure The invention relates to elastic surface-wave structures. The elastic surface wave structure in accordance with the invention comprises a non magnetic substrate and a surface wave transducer containing at least one emissive zone situated in a deposited la... | 01/30/1979 |
| 4129851 | Electroacoustic transducer with a magnetostrictive core Electromechanical transducer includes a magnetostrictive core formed of a superimposed stack of individual plates disposed within a cylindrical protective sheath and having a coil wound thereon in longitudinal direction thereof, the plates having the shap... | 12/12/1978 |
| 4110908 | Ultrasonic dental scaler An ultrasonic dental scaler is disclosed having a handpiece which comprises an outer shell, housing an electromechanical vibrator. The vibrator consists of a magnetostrictive transducer positioned within an energizing coil located within the shell, an aco... | 09/05/1978 |
| 4104549 | Magnetite ferrite for magnetostrictive vibrators A method for generating magnetostrictive vibration which comprises: Providing a vibrator element comprising a sintered structure of magnetite having an oxygen/iron (O/Fe) atomic ratio within the range of 4.0/3 to 4.1/3, a specific resistance of not lower than ... | 08/01/1978 |
| 4096735 | Engine detonation sensor with double shielded case A detonation sensor adapted for mounting on a vehicle engine component has a cylindrical outer case with an open end. An inner cylindrical case has an open end facing in the opposite direction as that of the outer case and is so disposed coaxially within ... | 06/27/1978 |
| 4078186 | Magnetically tuned, surface acoustic wave device A surface acoustic wave device having a thin magnetostrictive film deposi on the surface between its input and output transducers. A variable D.C. field is applied to the film to vary its characteristics and thereby correspondingly continuously vary the ... | 03/07/1978 |
| 4069444 | Ultrasonic power generator An ultrasonic power generator for operation at a one and a half kilowatt power output from a 220 volt, 50 hertz AC line comprising a transducer coil impedance associated with a resonant capacitor, said generator being generally designed for a one kilowatt... | 01/17/1978 |
| 4056761 | Sonic transducer and drive circuit A sonic transducer, having a drive electromechanical transducing element and a pickup electromechanical transducing element or a single transducing element electronically operating as both, is excited through suitable power amplifiers by a voltage control... | 11/01/1977 |
| 4017754 | Actuating devices An actuating device comprises an elongated member formed from a material having the property of magnetostriction and a winding which can be energized to cause flow of magnetic flux in the member so as to cause a physical change in the dimension. The elong... | 04/12/1977 |
| 4011758 | Magnetostrictive pressure transducer A magnetostrictive pressure transducer is disclosed wherein pressure in the range of zero to 1000 psi can be accurately measured. The pressure transducer apparatus includes a diaphragm causing the pressure to be applied unidirectionally on sensor material... | 03/15/1977 |
| 3980905 | Apparatus and method for tuning a broad bandwidth transducer array A fixed electrical network, in conjunction with an amplifier having varia output impedance, is used to provide each of the transducer elements of an array with a reactance which acts as a large shunt reactance when the amplifier acts as a constant curren... | 09/14/1976 |
| 3970184 | Mosaic printing head for typewriters or similar machines A mosaic printing head for typewriters, data printers, teleprinters and the like, utilizing dot-producing pin-like printing elements for recording characters in the form of a dot pattern upon a data carrier, employing a plurality of dot forming elements, ... | 07/20/1976 |
| 3957162 | Method and device for displacement of a workpiece The present invention relates to the displacement of a workpiece in a given direction to a good accuracy. According to the invention the friction between the workpiece and a sliding surface on which the workpiece is resting is overcome by a mechanical imp... | 05/18/1976 |
| 3942052 | Torsion vibrator of a supersonic viscosimeter A torsion vibrator for a supersonic viscosimeter having a magnetostrictive bar fixed at both ends to the case of the vibrator and passing through a toroidal transformer. A lower resonator is mechanically connected to the lower end of the magnetostrictive ... | 03/02/1976 |
| 3931533 | Ultrasonic signal generator A controllable frequency ultrasonic signal generator for driving an ultrasonic transducer via a switching type output circuit for the efficient transfer of energy thereto. The signal generator includes a phase lock loop feedback control for locking the op... | 01/06/1976 |
