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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 8054018 | Multi-level programming of motor for a ventilation system A method of constant airflow control for a ventilation system is disclosed. The method includes various controls to accomplish a substantially constant airflow rate over a significant change of the static pressure in a ventilation duct. One control is a constant I·... | 11/08/2011 |
| 8030864 | Motor drive circuit A motor drive circuit includes a first amplifier circuit to amplify a difference between first and second position detection signals with a gain becoming smaller according to drop in power supply voltage, to output a first amplification signal, the first and second ... | 10/04/2011 |
| 7723942 | Integrated motor and resolver including absolute position capability An integrated motor and position sensor achieves motion between a moving portion and a stationary portion by electrically energizing poles to interact with magnetics respectively on the moving and stationary portions. The position sensor includes a plurality of sens... | 05/25/2010 |
| 7719224 | Simulated encoder pulse output system and method The invention includes a system and method for generating simulated encoder outputs in a control system. An output pulse width between reference position inputs is computed, the output pulse width being based upon a difference between an updated reference position i... | 05/18/2010 |
| 7365929 | Synchronous servo channel for tape drive systems A fully synchronous servo channel for a data type drive is provided which includes the initial acquisition of synchronous servo channel parameters, generation of a timing basis for signal interpolation, generation of a tape velocity estimate and a y-position estimat... | 04/29/2008 |
| 7325171 | Measurement and data acquisition system including a real-time monitoring circuit for implementing control loop applications A measurement and data acquisition system including a real-time monitoring circuit for implementing control loop applications. The system control loop may include the real-time monitoring circuit, a data acquisition device, a processing unit, and a plurality of subs... | 01/29/2008 |
| 7291999 | System and method for diagnosing a controller in a limited rotation motor system A method of analyzing a limited rotation motor system is disclosed. The method includes the step of providing a motor control frequency domain signal that is representative of a frequency domain representation of the motor control signal responsive to a first digita... | 11/06/2007 |
| 7282883 | Pivoting and barrier locking operator system A system for moving a barrier between limit positions, includes an operator motor assembly mounted proximate to the barrier, wherein at least a portion of the motor assembly is movable between an operating position and a locking position with the motor assembly bloc... | 10/16/2007 |
| 7277011 | Removable memory media with integral indicator light A flash memory module includes an integral indicator light. The module alternatively includes a plurality electrical contacts which electrically interface to a host digital device. The module includes a plurality of flash memory cells. The cells are controlled by an... | 10/02/2007 |
| 7262959 | Drawer-type storage-unit housing apparatus An apparatus for housing a drawer-type storage unit including a storage unit that stores data and a case in which the storage unit is contained in a drawable manner includes a drawing-status determining unit that determines whether the case is drawn from the apparat... | 08/28/2007 |
| 7245101 | System and method for monitoring and control The invention provides for the monitoring and control of a system, such as a linear electro-mechanical transducer, e.g. a linear electric motor, particularly when driven in a reciprocating manner. A dynamic model of the linear motor and its load is used to calculate... | 07/17/2007 |
| 7219590 | Method for positioning a body along continuous-range inclination and rotation angles In a system for controlling the inclination angle and rotation angle of a body, a rotary actuator is coupled to a base. A pivot actuator is coupled to an output shaft of the rotary actuator. The rotary actuator controls the angular position of the pivot actuator. A ... | 05/22/2007 |
| 7215091 | Method for controlling a DC printer motor with a motor driver A method of the invention is for controlling a DC printer motor with a motor driver during a potential stall of the DC printer motor. One step of the method includes detecting the start of the potential stall of the DC printer motor. Another step includes thereafter... | 05/08/2007 |
| 7183731 | Pulse generating method and pulse generator, and motor control system using the same A method of generating pulses includes setting a cycle based on a frequency of reference clock, determining a total number of the pulses to be generated during the cycle, calculating the number of one or more first reference clocks used to determine a width of one o... | 02/27/2007 |
| 7180257 | Method of brake pulse rejection in commutation pulse detection circuits A system and method is provided for improved monitoring and controlling of mechanically commutated DC motors. The system and method include DC motors, pulse-count driver circuitry for driving the motors, motor position sensing circuitry, and motor control circuitry.... | 02/20/2007 |
| 7174586 | Operation control apparatus for electric bed An MPU sends pieces of information supplied by the input signals from a hand switch to a semiconductor memory device and the memory device stores these pieces of information. These pieces of information are: input points of an operation start signal and an operation... | 02/13/2007 |
| 7174445 | Flash memory card with enhanced operating mode detection and user-friendly interfacing system An interfacing system facilitating user-friendly connectivity in a selected operating mode between a host computer system and a flash memory card. The interfacing system includes an interface device and a flash memory card. The interfacing system features significan... | 02/06/2007 |
| 7170251 | System and method for diagnosing a controller in a limited rotation motor system A diagnostic system is disclosed for analyzing a limited rotation motor system. The diagnostic system includes a first transform unit, a second transform unit, a closed loop frequency response unit, and a diagnostic system. The first transform unit is for receiving ... | 01/30/2007 |
| 7170203 | Two-dimensional variable reluctance planar motor A kind of 2-D variable reluctance planar motor comprises: a stator base combined by a plurality of laminated steel bricks; a moving platform consisting of two rows of spaced coil-shoes; traditional sliding supports to hold said platform above said stator base; two e... | 01/30/2007 |
| 7164250 | Open-loop voltage driving of a DC motor The driving voltage of the motor is incremented a quantity proportional to the speed of the motor according to a proportionality factor that is adjusted to compensate the back electromotive force. A method includes open-loop voltage control of a DC motor having a ce... | 01/16/2007 |
| 7164244 | Apparatus for controlling electric motors and related control method An electric motor controller controls the currents flowing through the phase windings of an electric motor. The electric motor controller includes driving stages for driving respective phase windings of the motor and a memory for storing samples of reference signals... | 01/16/2007 |
| 7155559 | Flash memory architecture with separate storage of overhead and user data A flash memory system segregates overhead data from user data so that overhead data may be addressed, programmed and erased independently from user data. The non-volatile memory medium of a flash memory system is mapped into a plurality of separately addressable mem... | 12/26/2006 |
| 7148647 | Numerical control device An analog amplifier performs control of a motor at the speed in proportion to a speed instruction (analog voltage) outputted from a numerical control device. The speed instruction (analog value) is converted into a digital value by an A/D converter and is then sent ... | 12/12/2006 |
| 7138785 | Power tool with means for obtaining product use information A charging apparatus for charging a battery comprising a current source for providing current to the battery, a controller connected to the battery and to the current source for controlling charging of the battery, and a memory connected to the controller for storin... | 11/21/2006 |
| 7135831 | Method and device for controlling motor A motor control method is provided in which a cycle between at least one of leading edges and trailing edges of a pulse signal is measured. The pulse signal is outputted from a pulse signal generator which generates a pulse signal every time a driven target is drive... | 11/14/2006 |
| 7135830 | System and method for identifying operational parameters of a motor A system and method for establishing estimated values of electrical parameters of a motor. The electrical parameters may be established from stator resistance data and motor data obtained at a single load on the motor. The electrical parameters also may be establish... | 11/14/2006 |
| 7111085 | Flash memory card with enhanced operating mode detection and user-friendly interfacing system An interfacing system facilitating user-friendly connectivity in a selected operating mode between a host computer system and a flash memory card. The interfacing system includes an interface device and a flash memory card. The interfacing system features significan... | 09/19/2006 |
| 7103448 | Robot system A robot system capable of performing automatic updating of data inherent to a robot mechanism section or a mechanical unit thereof when changing the robot mechanism section or the mechanical unit. After changing the robot mechanism section or the mechanical unit, da... | 09/05/2006 |
| 7093540 | Method and device for initial adjustment of the register of the engraved cylinders of a rotary multicolor press To adjust peripheral register of engraved cylinders, the positions of a respective angular register mark arranged on each cylinder is measured with respect to a zero reference, and an angular printing mark characteristic of the position of the engraving is associate... | 08/22/2006 |
| 7095205 | System and method for inductance based position encoding sensorless SRM drives A controller (72) for a switched reluctance machine (20) implements a model of at least one active phase representing dynamic magnetic machine characteristics. The controller (72) determines machine control signals based on rotational position o... | 08/22/2006 |
| 7081730 | Motor controller system for large dynamic range of motor operation A motor controller system uses a rotary sensor with a plurality of signal conditioning units, coupled to the rotary sensor. Each of these units, which is associated with a particular range of motor output shaft rotation rates, generate a feedback signal indicative o... | 07/25/2006 |
| 7076340 | Method of controlling speed of synchronous motor, and method of identifying constant of synchronous motor In sensorless vector control performed through use of a rotation speed of a synchronous motor 6 and the position of a rotor, a positive current is caused to flow to a γ axis on the assumption that a “d” axis serving as a true magnetic axis is out of phase with ... | 07/11/2006 |
| 7075746 | Disk drives and disk drive containing devices that include a servo frequency generator and spindle control timer that compensate for disk eccentricity A disk includes an actuator assembly, a spindle motor and a disk that defines a plurality of servo wedges. A wedge to wedge timer is configured to measure the time elapsed between at least two circumferentially adjacent servo wedges and to output a wedge to wedge co... | 07/11/2006 |
| 7061202 | Automobile servomotor controller An automobile servomotor controller includes a master control unit having a master control circuit for transmitting a designation signal and a slave unit having a motor and a control circuit which controls driving of a motor by outputting an operation signal to a dr... | 06/13/2006 |
| 7062159 | Device for correcting a digital estimate of an electric signal A device for correcting a digital estimate of an electric signal is described. The device includes a comparator that generates a current proportional to the difference between an analog estimate signal, which derives from the digital estimate, and the electric signa... | 06/13/2006 |
| 7057366 | Method for estimating load inertia and a system for controlling motor speed using inverse model A method for estimating load inertia and system for controlling motor speed using inverse model are provided, suitable for an alternating current (AC) servo module. An inverse system is connected to an actual system to inversely deduce a substantial torque output, w... | 06/06/2006 |
| 7057364 | Actuation system comprising a digital position sensor An actuating system having an electric motor that is controlled by a computer as a function of a setpoint position of a member that is to be actuated. The actuating system includes an encoder that is dependent on the movement of the motor, a sensor designed to deliv... | 06/06/2006 |
| 7049778 | Inverter control apparatus and inverter control method An interrupt signal is generated at each of rising timings of PWM signals which are produced on the basis of phase-shifted triangular wave carrier signals for phases, and voltage command values for the phases. At timings of the interrupt signals, A/D conversion of m... | 05/23/2006 |
| 7039972 | Inflatable device with recessed fluid controller and modified adjustment device The application is related to inflatable devices, and, more specifically, to an inflatable device with a recessed fluid controller and improved adjustment device. In one embodiment, the application is directed to an inflatable device comprising a substantially fluid... | 05/09/2006 |
| 7034492 | Methods and systems for reducing unintentional collisions A method for differentiating if a feedback signal is a result of an unintentional collisions in a servo system includes injecting a feed forward term in the servo system. ... | 04/25/2006 |
