Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 7326565 | Storage apparatus The invention provides an incubator 1 wherein a microplate transport device 5 is disposed inside a chamber 11 centrally thereof. The transport device 5 comprises a transport table 50 for placing a microplate thereon and is capable ... | 02/05/2008 |
| 7253803 | Force feedback interface device with sensor A force feedback mouse interface device connected to a host computer and providing realistic force feedback to a user. The mouse interface device includes a mouse object and a linkage coupled to the mouse that includes a plurality of members rotatably coupled to eac... | 08/07/2007 |
| 7208896 | Electric jack load balancing method and device An electric jack load balancing method and device for reducing the difference in load carried by each jack of a pair of electric jacks while adjusting the attitude of a platform. The device includes a controller configured to reduce the difference in load carried by... | 04/24/2007 |
| 7199534 | Electric jack stroke limit detection method and device A method and device for detecting the stroke limit of an electric motor-driven jack while the jack is being used to adjust the attitude of a mobile platform. A controller is programmed to detect when an electric jack motor has driven a jack to a jack stroke limit by... | 04/03/2007 |
| 7193381 | Electric jack ground contact detection method and device An electric jack ground contact detection method and device for detecting ground contact of an electric motor-driven jack as the jack is being extended to adjust the attitude of a mobile platform. The device includes a controller that monitors the electrical power d... | 03/20/2007 |
| 7176645 | Control apparatus for electric railcar A control apparatus for an electric railcar that provides control so that when rotational speed of a motor decreases below a required value, torque of the motor will decrease at a required rate of change, a current limiter for limiting a torque current command “(A... | 02/13/2007 |
| 7148652 | Method and apparatus for determining and handling brake failures in open loop variable frequency drive motors A controller for a variable frequency drive monitors electrical power from a variable frequency drive motor while a brake is maintaining a load driven or moved by the motor without requiring additional feedback components of a closed loop configuration. If excess el... | 12/12/2006 |
| 7116099 | Angular position sensor and rotation control device An angular position sensor has a sensor element detects changes of magnetic field strength of a magnet that rotates in synchronization with a rotating body, for detecting its angular position. A circuit is provided for compensating hysteresis characteristics of an o... | 10/03/2006 |
| 7106313 | Force feedback interface device with force functionality button A force feedback mouse interface device connected to a host computer and providing realistic force feedback to a user. The mouse interface device includes a mouse object and a linkage coupled to the mouse that includes a plurality of members rotatably coupled to eac... | 09/12/2006 |
| 7053509 | Quench monitoring and control system and method of operating same A rotating machine comprising a superconductive coil and a temperature sensor operable to provide a signal representative of superconductive coil temperature. The rotating machine may comprise a control system communicatively coupled to the temperature sensor. The c... | 05/30/2006 |
| 7053589 | Long-life vacuum system for energy storage flywheels The invention, intended primarily for use in a steel flywheel power source (30), provides a vacuum system and a method of maintaining a vacuum inside a flywheel chamber (32) for the life of the power source (30). The vacuum system combines the u... | 05/30/2006 |
| 7042187 | Control apparatus for electric actuator A driver for an electric actuator comprises a direction-switching means which switches a direction of rotation of a rotary driving source based on a direction instruction input signal, a current amplifier/limiter which converts a voltage outputted from the direction... | 05/09/2006 |
| 7038410 | Electric motor with dynamic damping A method of dynamically damping an electric motor (12) that is controlled by an H-bridge driver (16) by interdigitating power pulses with braking pulses by switching from a power switch mode to a shorting circuit mode with switches (22 and 26... | 05/02/2006 |
| 7023162 | Automatic gate operator A barrier movement operator is having a position sensor in a telescoping barrier control arm is described. A controller, remote from the arm, senses the barrier position to identify limits of barrier travel and to control rate of travel of the barrier between limits... | 04/04/2006 |
| 6994145 | Motorized drapery pull system A quiet drapery pull system includes an elongated track that receives a master car and auxiliary cars. The track defines a pair of curved surfaces for nested receipt of roller members of the cars to facilitate linear tracking of the cars. The cars preferably include... | 02/07/2006 |
| 6992454 | Motor controller and method for measuring characteristics of mechanism A detector (20) detects the position of a motor, and a differentiator (26) calculates the speed of the motor from the position of the motor. An command generation section (11) fixes a position command to a current position. A position control se... | 01/31/2006 |
| 6956558 | Rotary force feedback wheels for remote control devices A force feedback wheel is provided on a mouse or other interface device manipulated by a user. A sensor detects a position of the mouse in a workspace and sends a position signal to a connected host computer indicating that position. A rotatable wheel is mounted upo... | 10/18/2005 |
| 6935403 | Motorized drapery pull system A quiet drapery pull system includes an elongated track that receives a master car and auxiliary cars. The track defines a pair of curved surfaces for nested receipt of roller members of the cars to facilitate linear tracking of the cars. The cars preferably include... | 08/30/2005 |
| 6909573 | Disk drive including means for preventing rotation A motor controller includes DC motor, driving mechanism, voltage generator circuit and control unit. The driving mechanism moves an object having a predetermined mass against a load applied to the object and by transmitting a rotational force of the motor to the obj... | 06/21/2005 |
| 6759824 | Motor controller and method of driving DC motor A motor controller includes DC motor, driving mechanism, voltage generator circuit and control unit. The driving mechanism moves an object having a predetermined mass against a load applied to the object and by transmitting a rotational force of the motor to the obj... | 07/06/2004 |
| 6657408 | Air conditioner In an air conditioner having a control unit receiving a power from a switching power supply, a supplied voltage for the control unit is reduced to a possible lowest voltage for the unit to operate. This arrangement provides the air conditioner with less e... | 12/02/2003 |
| 6642682 | Circuits and methods for preheating a rotor of a motor-generator device The motor-generator circuitry of a flywheel energy conversion device can be utilized to preheat the rotor of the flywheel device. It may be desirable to preheat the rotor prior to normal operation because a rotor operating in cold temperature may be more ... | 11/04/2003 |
| 6617819 | Method of controlling preheating power and mechanism for providing preheating The present invention relates to a motor and especially to a technique for maintaining constant power consumption in preheating a compressor motor in an air conditioner. An object thereof is to permit constant preheating of the motor irrespective of varia... | 09/09/2003 |
| 6386279 | Automotive air-conditioning apparatus To make it possible to provide high quality heating or warming with low environmental pollution for a low environmental pollution vehicle such as an electric vehicle or a hybrid vehicle, an automotive air-conditioning apparatus has a hot water circuit tha... | 05/14/2002 |
| 6344722 | Control device for a membrane pump A control device for a diaphragm pump to feed a filter press or similar user unit comprising a three-phase electric driving motor for the pump which is connected to a supply main via a variable-frequency converter, which frequency converter has an analogu... | 02/05/2002 |
| 6342771 | Laboratory centrifuge with an electric motor heated during a stop A laboratory centrifuge, whose centrifuge rotor is mounted in a bowl (6) which can be brought to the correct temperature and which is set up in particular for the setting of temperatures below the ambient temperature, is provided with a drive means compri... | 01/29/2002 |
| 6154605 | Control device for diaphragm pump A control device for a DC motor driving a diaphragm pump including a pulse generating integral circuit and a variable voltage setting integral circuit. The variable voltage setting integral circuit sets a pulse-base voltage at a level such that the DC mot... | 11/28/2000 |
| 6150780 | AC motorized wheel control system Torque is distributed by calculating first and second torque commands using a requested torque and a ratio of speeds of first and second wheels and limiting them in accordance with respective torque command approved ranges and approved change rates; conve... | 11/21/2000 |
| 5896021 | Removal of moisture from induction motors A method for removing moisture from an induction motor having at least two phase windings with each phase winding coupled by a first respective parallel combination of a first switch and a first diode to a positive voltage line and a second respective par... | 04/20/1999 |
| 5708336 | Thermal control system for a motor The present invention is a temperature control system for a motor coupled to a power source. The motor has at least one winding which serves as a heater and temperature sensor as well as producing torque during normal operation. The mathematical relations... | 01/13/1998 |
| 5656901 | Reaction force generating apparatus A reaction force generating apparatus is provided which generates a reaction force for a rotationally operated member to be manually or mechanically operated. An alternating motor is provided that has a stator with three-phase coils; a rotor including per... | 08/12/1997 |
| 5619112 | Bi-directional electric torque motor and driver A limited angle torque motor and control circuit are adapted to convert an electrical demand signal of varying magnitude into a motor shaft position relating to the magnitude of the demand signal. More particularly, a bidirectional motor is provided havin... | 04/08/1997 |
| 5077508 | Method and apparatus for determining load holding torque A motor control method and apparatus for a hoist is disclosed in which a drive motor is connected to an adjustable frequency power supply in which the frequency of the power supplied to the motor can be selectively varied. At the initiation of a hoist ope... | 12/31/1991 |
| 5049793 | Method of controlling V/F inverter for machines having mechanical braking systems There is disclosed a method of controlling a voltage-to-frequency inverter which controls an induction motor by the use of an open-loop system. The motor drives a machine such as a crane, and is braked by a mechanical brake. When the machine is started or... | 09/17/1991 |
| 5034670 | Control circuit for electromagnetic actuator An actuator comprises a housing; a permanent magnet arranged in the housing to be rotatable; an output shaft coupled to the permanent magnet; a stator fixed in the housing in such manner to be separated from the outer peripheral surface of the permanent m... | 07/23/1991 |
| 4984126 | Method and circuit for stopping the test run of a rotor being balanced A method and a circuit arrangement for stopping the test run of a rotor being balanced, in particular a rotor for a motor vehicle wheel. Upon the application of an armature disk of an electromagnetic brake to a friction lining, the electromagnet coil of t... | 01/08/1991 |
| 4902953 | Motorized window blind electrical actuator A motorized window blind actuator including input means for receiving regulated voltage and first variable reference voltage signal. A motor having an output shaft which connects to the window blinds to open and close the window blinds is controlled by a ... | 02/20/1990 |
| 4845418 | Flux profile control for startup of an induction motor A method of controlling current in an AC motor to inhibit small torques on an unloaded motor output shaft and to improve buildup of steady-state operating flux in a rotor includes supplying current to the stator windings through a plurality of semiconduct... | 07/04/1989 |
| 4808896 | Control device for heating deep-sea electric motor oil A control device monitors the elapsed off time of an oil filled deep sea electric motor 4, and compares this with a calculated time for the oil temperature to drop to a predetermined value at a sensed water depth. When the two times are equal a low, heati... | 02/28/1989 |
| 4780653 | Anti-stall motor drive An anti-stall motor drive circuit for a very slow running permanent magnet d.c. motor is disclosed. The slow running speed of the motor sometimes allows an insulating film to build up between the brushes and the commutator which causes the stalled conditi... | 10/25/1988 |
