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| Number | Title | Issue Date |
| 5391973 | Method of charging a multiplicity of batteries A method is provided for charging a multiplicity of electrochemical storage, such as cells, cell stacks, and/or batteries. For each storage aqueous electrolytic liquids are infed and outfed at least periodically, or continuously, to and from individual an... | 02/21/1995 |
| 5365140 | Piezoelectric actuator having strain gage Strain gages (81, 82, 83) are adhered to protective layers (31, 32) and an active portion (2) of a laminated-structure (10) of the piezoelectric actuator, respectively. Since it is possible to measure a total amount of displacement of the protective layer... | 11/15/1994 |
| 5352968 | Battery charge state determination Method and apparatus for accurately determining the charge state of a battery is disclosed. The charge state is derived from the battery voltage, which is corrected for errors introduced by temperature and series resistance. Error from series resistance i... | 10/04/1994 |
| 5338999 | Piezoelectric lead zirconium titanate device and method for forming same A piezoelectric device, such as a surface acoustic wave filter, comprises a piezoelectric film composed of a lead zirconium titanate compound applied to a substrate formed of silicon or gallium arsenide. The device includes an intermediate film between th... | 08/16/1994 |
| 5331269 | Standby control for electromagnet A power circuit has an AC portion connected with a main AC source and a DC source portion including a magnet and battery constantly connected in parallel. Back-to-back SCRs control a rectifier between the AC and DC portions. A DC control circuit includes ... | 07/19/1994 |
| 5327040 | Ultrasonic motor with a vibrating body and a moving body driven thereby An ultrasonic motor achieves uniform contact between a vibrating body and a moving body and features high output transfer efficiency and high reliability. The manufacturing process for the moving body can be simplified and the moving body made lighter by ... | 07/05/1994 |
| 5323081 | Surface acoustic wave device clamped within housing An assembly includes a Surface Acoustic Wave (SAW) component disposed within a housing or capsule by supports which support the component close to, but not in contact with, the bottom of the housing or capsule, thereby allowing some movement of at least p... | 06/21/1994 |
| 5307001 | Battery charging method and apparatus A battery charger employing the gassing point of a lead-acid battery to determine the end of charge time and voltage. A charging level sensor takes two voltage samples of a predetermined time period to determine the change in voltage rate. If the change i... | 04/26/1994 |
| 5306979 | Multiplexing incremental linear actuator system An actuator system for linear movement comprises an array of movable control wires, a spring-loaded, axially telescoping assembly and two bi-directional one-way clutch assemblies fitted to the ends of the telescoping assembly, the reciprocating compressiv... | 04/26/1994 |
| 5304917 | Compact low noise low power dual mode battery charging circuit A low noise battery charger includes a rectifier to convert AC line voltage to a rectified sinusoidal voltage that is applied to a primary winding of a transformer. Another rectifier coupled to a first secondary winding applies a charging current to a bat... | 04/19/1994 |
| 5304916 | Battery charger A battery charger is provided for use in electronic devices such as a portable computer. When the electronic device is being powered by an external source of power, such as an AC adapter, the battery charger charges the batteries in the electronic device.... | 04/19/1994 |
| 5302879 | Temperature/reference package, and method using the same for high pressure, high temperature oil or gas well A dual crystalline resonator package comprises either (1) two crystalline bodies, in adjoining cavities of which bodies a crystalline temperature resonator and a crystalline reference resonator are respectively connected and which bodies are directly conn... | 04/12/1994 |
| 5302880 | Piezoelectric tuning fork resonator and method of manufacturing the same A piezoelectric tuning fork resonator having a piezoelectric substrate provided with a stepped portion on its end and a tuning fork arm portion formed in the stepped portion. A dummy substrate is arranged adjacent to a side of the piezoelectric substrate ... | 04/12/1994 |
| 5300737 | Tubular linear motor driven elevator A linear motor driven elevator comprises: a cab capable of upward and downward movement; a linear motor comprising a movable element and a stationary element; a counterweight attached to the movable element such that the movable element is disposed thereo... | 04/05/1994 |
| 5300851 | Linear-type actuator In a linear-type actuator where an elastic wave is excited upon the vibrator composed of a rod shaped elastic member and a piezo member so as to drive the moving member bought into pressure contact upon the vibrator, the present invention provides a linea... | 04/05/1994 |
| 5298829 | Vibration wave driven motor In a vibration wave driven motor wherein an AC electric field is applied to an electro-mechanical energy conversion element secured to an elastic member to thereby excite a plurality of standing waves differing in phase from each other in the elastic memb... | 03/29/1994 |
| 5298851 | Multiple application voltage regulator system and method A single integrated circuit for multiple vehicle voltage regulator applications is inexpensive, programmable and responsive to mixed signals. The integrated circuit provides both analog and digital functions, and uses a single voltage comparator serving a... | 03/29/1994 |
| 5296772 | Ventilated brush holder A ventilated brush holder for an alternating current generator. The brush holder has a tubular shield portion, a brush holding portion and a bearing retainer portion. The shield portion encloses the slip rings of the rotor of the generator. The brush hold... | 03/22/1994 |
| 5294860 | Piezoelectric filter A piezoelectric filter in which an earth electrode is provided in the center of a piezoelectric substrate in the direction of thickness; an input electrode is provided on the upper surface of the piezoelectric substrate so as to be opposed to one part of ... | 03/15/1994 |
| 5294861 | Ultrasonic probe An ultrasonic probe is disclosed wherein the sonic energy is transmitted by sonic waveguides from ultrasonic transducers at the proximal end of the probe to the ultrasonic directional elements at the distal end. The sonic waveguides are designed so that t... | 03/15/1994 |
| 5293095 | Air pressure variation detector The air pressure variation detector comprises a base plate having a through hole or a cavity, a piezoelectric element fixed to the base plate so as to locate above the through hole or the cavity and formed in a strip-like shape having a width narrower tha... | 03/08/1994 |
| 5288956 | Self running type elevator system using linear motors A self running type elevator system using linear motors in which a control of power supply to a plurality of elevator cars can be achieved without increasing the size of the system enormously. The system includes at least one travelling corridors, each of... | 02/22/1994 |
| 5287033 | Vibrating surface gyroscopes A vibrating surface gyroscope includes a piezoelectric resonator 10 of material arranged to have a plurality of poles 12, 14 of opposite sense or polarity disposed around the sensing axis. The resultant bi-directional (forward and reverse) poling establis... | 02/15/1994 |
| 5285369 | Switched mode power supply integrated circuit with start-up self-biasing An embodiment of the present invention is a switching power supply that includes a full-wave bridge rectifier to rectify incoming AC line voltage, a transformer having a primary winding and two secondary windings and a switched mode power supply chip that... | 02/08/1994 |
| 5285027 | Hydraulic elevator and a control method thereof A hydraulic elevator comprises a car, a hydraulic jack to drive the car, a hydraulic pump, and control means for controlling a flow rate of fluid flowing to or from the hydraulic jack thereby to control movement of the car. The control means comprises a m... | 02/08/1994 |
| 5283727 | Independent control of the AC line current and output DC voltage of a high power factor AC-to-DC converter A method and system for controlling a dual output power converter of the type having a pair of input terminals connectable to a source of rectified AC power of variable voltage amplitude, a boosting circuit including a secondary winding of a boost transfo... | 02/01/1994 |
| 5283513 | Battery charging device for electric vehicles A battery charging device for electric vehicles with a high-voltage battery, has a first connector to be connected with a high-voltage power source outside the vehicle, a second connector to be connected with a low-voltage power source outside the vehicle... | 02/01/1994 |
| 5281774 | Drive control unit for hydraulic elevator A drive control unit for a hydraulic elevator comprises: an inverter for variably driving the motor; a speed detector for detecting a rotating speed of the motor; a current detector for detecting a primary current of the motor; a speed control, unit for c... | 01/25/1994 |
| 5281884 | Adjustable X-Y stage An adjustable X-Y stage (10) comprises a single monolithic member from which regions have been cut to define a central mounting portion (19), a peripheral frame portion (20) a plurality of moveable portions (21), each located between the central mounting ... | 01/25/1994 |
| 5281887 | Two independent spatial variable degree of freedom wavefront modulator To provide electrical isolation to piezoelectric parallel shear mode elements in wavefront phase modulators arrays, the functionality of the mounting configuration is increased. The mounting configuration involves embedding a respective interface electrod... | 01/25/1994 |
| 5281883 | Surface acoustic wave device with improved junction bonding and package miniaturization A surface acoustic wave device in which a surface acoustic wave device element is arranged with interdigital electrodes on a piezoelectric substrate is packaged in a package provided in a metal pattern. Metal bumps are formed on a bonding pad section of t... | 01/25/1994 |
| 5276292 | Operation check device of dynamic brake circuit for elevator In this invention, a provision is made for a means for detecting the voltage or current of a dynamic brake regenerative (DBR) circuit for determining whether the DBR circuit is properly functioning in an elevator system in which a DBR circuit for controll... | 01/04/1994 |
| 5276293 | Tubular linear motor primary element A tubular linear primary element is constructed of a plurality of core groups, each core group being constructed of a plurality of laminated comb-shaped plates, each plate having a plurality of radially aligned teeth and slots. The core groups are coupled... | 01/04/1994 |
| 5274293 | Piezoelectric filter A piezoelectric filter of an energy-trapped type utilizing a second harmonic wave of the thickness-extensional vibration mode, characterized in that an earth electrode is formed around the center of a piezoelectric substrate in the direction of thickness,... | 12/28/1993 |
| 5270604 | Tandem field alternator having an improved coil and slip ring connection and method of making the same A tandem Coil armature in which a pair of spaced-apart field coils [91,92] are wound on bobbins [12,14] mounted within a set of magnetic core pieces [16,18,20,22]. Two L-shaped conductors [27,28] pass through passageways through the core pieces and connec... | 12/14/1993 |
| 5270606 | Processing robust acoustic reflectors A reflector arrangement for an acoustic wave device comprises an acoustic wave propagating substrate, reflection elements having at least two different widths separated by at least one gap breadth disposed on the acoustic wave propagating substrate. The a... | 12/14/1993 |
| 5270636 | Regulating control circuit for photovoltaic source employing switches, energy storage, and pulse width modulation controller A regulating circuit controls current flow from a photovoltaic power source (20) to a storage battery (38) to improve the conversion of solar energy to electric energy. Two transistors (22, 30) are switched on and off at high frequency to regulate the ave... | 12/14/1993 |
| 5268610 | Acoustic ink printer An acoustic ink printer transducer comprising a piezoelectric layer positioned between two suitable electrode materials. Also, a method for obtaining second harmonic operations from an acoustic ink printer transducer to enable ejection of a number of diff... | 12/07/1993 |
| 5268611 | Anisotropic transducer This invention relates to an actuator which changes its length without changing its width or breadth dimensions. Four shear electrodeformable bodies 4 are placed symmetrically on two faces of a central electrode 6. Each body also has a connecting electrod... | 12/07/1993 |
| 5268629 | Electrical appliance with battery charging capability and connection means The invention is directed to an electrical appliance comprising a housing structure for accommodating at least one functional component and at least one rechargeable storage cell cooperating with the functional component, a storage cell charging circuitry... | 12/07/1993 |
