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| Number | Title | Issue Date |
| 4099876 | Phase-coded control for ring laser gyro In a laser gyro, laser optics adjustment means comprising a mirror within the laser optics of the gyro and mounted upon a three-terminal duo-mode bimorph device for duo-mode modulation of the laser optics. A two-stage differential amplifier is responsivel... | 07/11/1978 |
| 4100442 | Electrically driven oscillating capacitor device A spring member is resin bonded to a piezoelectric material body at one end nd at the other end carries the oscillating electrode of a Kelvin probe capacitor used for electron work function measurement under vacuum. The piezoelectric material body can be e... | 07/11/1978 |
| 4099211 | Positionable transducing mounting structure and driving system therefor In a system mounting a magnetic transducer on the end of a thin leaf for sweeping motion displacement laterally to a track on a record surface, the present invention utilizes elements arranged as reversely deflectable leaf portions so as to maintain the t... | 07/04/1978 |
| 4096756 | Variable acoustic wave energy transfer-characteristic control device The effective thickness of a piezoelectric unit comprising a plurality of contiguous layers is varied by selectively short circuiting one or more layers with switch means. This varies the electro-acoustic properties at an operating frequency that is exhib... | 06/27/1978 |
| 4093883 | Piezoelectric multimorph switches A multimorph is a piezoelectric element which moves or bends as an incident to being charged or otherwise subjected to an electrostatic field so that a potential gradient appears across the element. The amount of movement or bending can be sufficient to a... | 06/06/1978 |
| 4087715 | Piezoelectric electromechanical micropositioner An electromechanical micropositioner for making minute angular and linear translational displacements of an element attached to same. The micropositioner employs electrical control potentiometers, a power source, and a signal source that provides for the ... | 05/02/1978 |
| 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 |
| 4054848 | Ultrasonic oscillator An ultrasonic oscillator, which can be mounted on a vehicle and which enables an oscillating element itself to generate a high ultrasonic energy, comprising a storage battery having one power line thereof grounded, a DC -- DC converter which is electrical... | 10/18/1977 |
| 4051426 | Shoot through protected current driven transistor inverter circuit An inverter circuit using transistors in the switch mode, suitable for induction heating for cooking and sonar applications. Diodes are used in the base circuit of the transistors to postpone conduction and prevent shoot-through, and diodes are used to li... | 09/27/1977 |
| 4049981 | Piezoelectrically driven ultrasonic tool with cooling A hand held device for generating ultrasonic vibrations comprises an elongated tubular casing having therein a piezoelectric vibrator element and a generator that develops an electrical signal having a predetermined ultrasonic frequency that excites the p... | 09/20/1977 |
| 4047992 | Turn-on method and apparatus for ultrasonic operations Ultrasonic method and apparatus having improved turn-on. Low level power is furnished to an unloaded transducer to start it running at a desired frequency. High level power is then furnished the transducer for performing the ultrasonic operation while loa... | 09/13/1977 |
| 4044297 | Ultrasonic generator with combined oscillator and current regulator An ultrasonic generator comprising an ultrasonic transducer having a natural frequency at which the dynamic admittance becomes maximum; a main circuit consisting of a switching circuit or first current regulator and a second current regulator connected in... | 08/23/1977 |
| 4035672 | Acoustic transducer with a dual purpose piezoelectric element An acoustic transducer having a piezoelectric element secured to a conical diaphragm with the piezoelectric element forming part of a relaxation oscillator circuit. The piezoelectric element performs the dual function of firstly developing acoustic energy... | 07/12/1977 |
| 4023162 | Electronic buzzer An electronic buzzer comprises an acoustic vibrator comprised of a circular metal plate having its entire periphery rigidly secured to a support, and a piezoelectric element adhered to one face of the metal plate. A driving circuit applies electric drivin... | 05/10/1977 |
| 4019072 | Piezoelectric pressure sensor A piezoelectric pressure sensor for detecting the amount of oil in an engine oil pan of an automobile, and liquid level or the amount of liquid such as water level in a water bath, makes use of the phenomenon that an impedance of an excited piezoelectric ... | 04/19/1977 |
| 4012647 | Ultrasonic motors and converters The invention discloses various embodiments of an ultrasonic motor and converter adapted to be used in home or industrial ultrasonic devices. The ultrasonic motor is generally of a piezoelectric material having a removable tip or of a design in which the ... | 03/15/1977 |
| 4004409 | Watch having a piezo electric buzzer mechanism A watch includes a housing including an apertured sound transmitting housing portion. A diaphragm is carried by the housing. A piezo electric element is carried by one surface of the diaphragm and is oscillatable in response to electrical excitation. Exci... | 01/25/1977 |
| 4004165 | Ultrasonic signal generators A piezo electric signal generator and receiver assembly for a flaw detector has a generator adjacent to the crystal transducer and a cable connection to a distant point where a d.c. power supply and the indicator is located. The same cable is used for sup... | 01/18/1977 |
| 3989964 | Piezoelectric switch activating means At least three pairs of opposing electrodes on the two major faces of a poelectric or electrostrictive transducer element having a gap which is adapted to change in response to selected control voltages applied across the three pairs of electrodes. The p... | 11/02/1976 |
| 3989042 | Oscillator-exciting system for ultrasonic liquid nebulizer In an oscillator-exciting system for a ultrasonic liquid nebulizer, a piezo-oscillator element for nebulizing the liquid is electrically connected to a self-exciting oscillating circuit as a constituent element thereof and the circuit is oscillated at tha... | 11/02/1976 |
| 3986669 | Ultrasonic tubular emulsifier and atomizer apparatus and method A tubular section is constructed for radial and axial resonance. The tubular resonator is clamped along a line of clamping engagement near one end of the tubular section and is driven by means of radially directed oscillatory force applied at a line of dr... | 10/19/1976 |
| 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 |
| 3980906 | Ultrasonic motor-converter systems Ultrasonic systems for use in consumer, and other applications, having electromechanical motor systems providing bursts of ultrasonic mechanical vibration at an applicator repeated at a sonic frequency to produce both ultrasonic and sonic vibratory motion... | 09/14/1976 |
| 3978353 | Piezoelectric acoustic speaker system A Piezoelectric speaker system with a piezoelectric diaphragm supported in a cylindrical form and provided with a plurality of vibration regions, which is capable of controlling the directional characteristics by easy operation according to necessity or l... | 08/31/1976 |
| 3955545 | Post carburetor atomizer An ultrasonic fuel atomizer which is inserted between a standard carburetor and intake manifold of an internal combustion engine to cause a more uniform mixture of fuel and air to be attained, thereby promoting fuel economy and increasing the efficiency o... | 05/11/1976 |
| 3952215 | Stepwise fine adjustment A variable d.c. source is connected to electrodes provided on the inner and outer surfaces of a hollow cylindrical body formed of piezoelectric ceramic through a switch to achieve dilations of the body by a variable applied voltage. Leg members are fixed ... | 04/20/1976 |
| 3947708 | Apparatus for and method of converting from a digital signal to an acoustic wave using a piezoelectric beam A piezoelectric beam is fixed at one end and is subdivided into segments, each of which is deflected by a logic one in one of the magnitude bit locations of a digital word. The total deflection of the beam is related to the total magnitude of the digital ... | 03/30/1976 |
