Did You Know...
...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7443114 | Image forming apparatus A position detecting unit detects rotational position information of a plurality of motors. A phase difference control unit delays an excitation phase switching pulse of at least one of the motors by a predetermined amount on the basis of the rotational position inf... | 10/28/2008 |
| 7205730 | Article transport vehicle The invention provides an article transport vehicle that includes: a vehicle body; a first wheel that supports the vehicle body; a second wheel that is disposed spaced apart from the first wheel in a fore-and-aft direction, and that supports the vehicle body; a firs... | 04/17/2007 |
| 7202616 | Synchronous control method and device of the same A synchronous control device which is provided with drive motors and a central control unit generating a synchronous reference signal and with which the drive motor is controlled to rotate synchronously with the synchronous reference signal supplied from the central... | 04/10/2007 |
| 7191895 | Conveyor induct system with probability estimator A conveyor system, such as an induction subsystem for supplying articles to a sortation subsystem, and method of conveying articles includes providing a conveying surface for conveying a series of articles and at least one sensor for sensing the articles on the conv... | 03/20/2007 |
| 7157873 | Systems and methods for reducing torque disturbance in devices having an endless belt A system for reducing torque disturbance includes a motor mechanically coupled to an endless belt. The motor is operable to drive the belt, and the belt has a seam that causes a torque disturbance to the system. The system includes a data structure having a set of v... | 01/02/2007 |
| 7138772 | Electrically movable vehicle and control program for driving electrically movable vehicle The invention provides an electrically movable vehicle drivable by a simplified mode of control and a control program for driving the vehicle. A normalized value Y′ representing translation motion and a normalized value X′ representing turning motion are fed fro... | 11/21/2006 |
| 7109670 | Motor drive with velocity-second compensation An apparatus for use with a signal generator and a motor controller includes a velocity compensator, an adjustor, and a velocity regulator. The signal generator provides a reference velocity signal, and the motor controller receives an output signal and uses the out... | 09/19/2006 |
| 7016768 | Conveyor system for transporting articles, in particular containers for baggage pieces, and method for controlling such a conveyor system A system and method is described for transporting articles, in particular for transporting container holding baggage pieces. At least two endless conveyor belts are sequentially arranged to define an upstream conveyor belt and a downstream conveyor belt for transpor... | 03/21/2006 |
| 6897625 | Load-dependent asynchronous drive for a transport path A conveyor system for transported goods which are transported with a preset transport speed and method for operating the conveyor system are described. The individual conveyers of the system are driven by asynchronous motors. Sensors associated with the conveyors me... | 05/24/2005 |
| 6384566 | Motor combination system and method for operating as an induction motor or a stepping motor A motor combination system with operating method for operating as an induction motor or a stepping motor is disclosed. The disclosed system basically encompasses a switch device, an induction motor control module, and a stepping motor control module. Driv... | 05/07/2002 |
| 6384562 | Scanner motor acceleration method A scanner motor acceleration method that uses a software driver and a flexible process method to enable a scanner to perform fast scanning operation without increasing motor cost or complex hardware design. Motor acceleration and deceleration may be done ... | 05/07/2002 |
| 5932931 | Vehicle window control system responsive to external force When a closing end of a vehicle windowpane is located at the upper side of a preset point P1 while the windowpane is closing, an obstacle pinched between a window frame and the windowpane is detected by a window frame sensor. When the closing end of the v... | 08/03/1999 |
| 5929575 | Motor control device controlling intended speed ratio and positional relationship between driven objects According to a motor control device, an operation of one of multiple motors is feedback-controlled based on a target speed signal corresponding to a predetermined target travel speed of a driven object driven by the one motor, or based on the target speed... | 07/27/1999 |
| 5434486 | Synchronous operation system In a synchronous operation system, rotating positions of two rotating elements MSP and SSP driven by induction motors IM1 and IM2 are maintained in a predetermined positional relation, what is called, a synchronous control by a posit... | 07/18/1995 |
| 4982142 | Circuit for controlling the speed of a magnetic tape reel motor of audio recording/playing mechanism and method therefor A circuit for controlling the speed of a magnetic tape reel motor of an audio signal recording/playing mechanism. The circuit is based on the fact that the reel revolution period varies at a constant rate per revolution. The circuit measures the frequency... | 01/01/1991 |
| 4906906 | Conveyance with electronic control for left and right motors A conveyance (10) is provided with: automatic limiting (223) of the rate of change in power supplied to left (26a or 232a) and right propulsion motors, whether electrically or hydraulically propelled; dynamic braking of electric propulsion motors (26a and... | 03/06/1990 |
| 4891566 | Method for speed regulation and switch arrangement for performing the method To regulate the speed of a plurality of asynchronous motors fed by a converter having a variable output frequency and output voltage and having a load-dependent slip, particularly asynchronous motors for driving spindles of a textile machine, the rotation... | 01/02/1990 |
| 4712048 | Process and apparatus for controlling the spindle speed of a gear cutting machine A tool spindle is driven by a motor and is connected to an angle of rotation transmitter. The signal of the transmitter connected to the tool spindle represents the desired value for the drive of a work piece spindle. The angle of rotation of the workpiec... | 12/08/1987 |
| 4463289 | Wheel slip control using differential signal Apparatus for controlling wheel slip in a locomotive driven by d.c. motors which receive power from a diesel driven generator, has sensors which provide signals representing speeds of different driven wheels to a velocity unit. The velocity unit derives a... | 07/31/1984 |
| 4460852 | Method of controlling mill motors speeds in a cold tandem mill This invention concerns a method of controlling mill-motor speed in a cold tandem mill. During unsteady phases of rolling operation such as threading, rolling speed acceleration and/or deceleration, and tail out with respect to the coil being rolled, mill... | 07/17/1984 |
| 4401034 | Aerial cableway having a return sheave with a speed stabilization device The subject of this invention is an aerial cableway having a towing cable which is continually driven by a drive motor located in one station. In another station, the cable passes over a return sheave which is mechanically coupled to an electric speed sta... | 08/30/1983 |
| 4376913 | Method and apparatus for synchronously driving AC synchronous motors A plurality of AC synchronous motors used to drive respective machines in a manufacturing or packaging assembly line or system are driven in speed and phase synchronization. A common AC current supply signal is inverted to provide one polyphase set of ser... | 03/15/1983 |
| 4363999 | Electric propulsion and braking system for automotive vehicles An electric propulsion and braking system which includes a plurality of high-speed, dc commutatorless motors each coupled to a wheel of an automotive vehicle through an associated fixed-ratio mechanical transmission. Each motor includes a field winding, a... | 12/14/1982 |
| 4334175 | Digital speed control method and apparatus In a speed control method for digitally controlling the speeds of motors in a sectional drive system including the steps of setting a speed difference of each section with respect to a line speed reference, the speed difference set value is varied by pres... | 06/08/1982 |
| 4174237 | Process and apparatus for controlling the speed of web forming equipment A speed control system is provided for apparatus and process for shaping and treating web material of indefinite length wherein the apparatus includes a master processing unit, one or more slave processing units communicating with the master unit through ... | 11/13/1979 |
