Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7990087 | System and method for providing cooling fan characteristic feedback A device comprising a fan controller, an encoder, a driver, a resistor/capacitor filter, and a baseboard management controller. The fan controller is configured to output a cooling fan status signal, and to output a cooling fan information data signal. The encoder i... | 08/02/2011 |
| 7915849 | Method and system for low speed control of a video surveillance system motor The present invention provides a method and system that improve the low-speed control stability of a video camera assembly, including a video camera, a tilt motor operable to tilt the video camera and a pan motor operable to pan the video camera. A first encoder is ... | 03/29/2011 |
| 7804268 | Apparatus and method of controlling injection in electric injection molding machine An apparatus and method of controlling injection in an electric injection molding machine including a motor and a screw. The apparatus has an encoder detecting a current position of the screw and outputting the detected position as an encoding signal, a memory stori... | 09/28/2010 |
| 7696712 | Motor controller providing position feedback correction A motor controller employs absolute encoder signals to periodically assess the existence of cumulative error in a position signal derived from an incremental encoder signal. In one embodiment the absolute encoder signals are extracted from commutation switches of th... | 04/13/2010 |
| 7633256 | Encoder eccentricity correction for motion control systems Correction of rotary encoder eccentricity in an image forming device having a motor controller using period and position pulse train feedback signals. A motor includes an encoder disc rotating with the motor and at least two encoder sensors disposed at different cir... | 12/15/2009 |
| 7508154 | 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... | 03/24/2009 |
| 7468594 | Protection device The present invention relates to a safety system for use in protection functions, which system prevents that an error in one control circuit do not result in a function failure by using supervising functions comprising at least two sensors connected to a monitoring ... | 12/23/2008 |
| 7377379 | Transport belt drive control device, image forming device, and transport belt drive control method In a transport belt drive control device, a first detection unit has a first resolution and indirectly detects a feed amount of a transport belt, a control unit controls drive of the transport belt based on an output of the first detection unit, and a second detecti... | 05/27/2008 |
| 7375487 | Geared motor A motor encoder is mounted on a motor shaft of a geared motor 1, and the origin position is detected by using a Z-phase signal. An absolute value encoder with a precision that allows the number of motor rotations to be determined is mounted on an output shaft... | 05/20/2008 |
| 7368705 | Absolute encoder employing linked sub-encoders and beat track An absolute encoder employs multiple sub-encoders of different resolutions and a linking algorithm for combining the sub-encoder outputs to form an accurate, high-resolution position estimate. The sub-encoders can utilize edge modulation of a main grating track, slo... | 05/06/2008 |
| 7358480 | System and method for re-synchronizing an access barrier with a barrier operator A system for re-synchronizing an access barrier with a barrier operator comprises an access barrier, and a barrier operator to profile and monitor the manual and automatic movements of the access barrier. The barrier operator comprises a controller, a memory, a moto... | 04/15/2008 |
| 7357575 | Telescoping table A telescopic table system (32) is used for imaging a subject in at least a first modality (12) and a second modality (14). The first modality is disposed adjacent to the second modality to align a subject receiving bore (24) of the first ... | 04/15/2008 |
| 7331692 | Light beam projector with filter set rotating on its own axis A light beam projector has a light source and a reflector arranged to have light generated by the light source converge into a light beam. The reflector has a hollow curved surface with a focal point where the light source is positioned, and a filter able to change ... | 02/19/2008 |
| 7328640 | Turret tool holder for a press A tool-changing system for a press utilizes a rotary turret on which different tools are rigidly fixed. The turret includes a circular table base which is rotatably mounted on top of the press anvil. As the turret is turned, a different tool is moved into the work z... | 02/12/2008 |
| 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 |
| 7321113 | Precision material-handling robot employing high-resolution, compact absolute encoder An absolute encoder employs multiple sub-encoders of different resolutions and a linking algorithm for combining the sub-encoder outputs to form an accurate, high-resolution position estimate. The sub-encoders can utilize edge modulation of a main grating track, slo... | 01/22/2008 |
| 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 |
| 7260490 | Method for measuring a delay time of a digital circuit and corresponding device and digital circuit In a method and device measuring a delay time of a section of a digital circuit, an output signal of the section is saved in different memory locations with a clock and earlier by a time interval with respect to the clock, different durations being assigned to the t... | 08/21/2007 |
| 7253395 | Absolute encoder employing concatenated, multi-bit, interpolated sub-encoders An absolute encoder employs multiple sub-encoders of different resolutions and a linking algorithm for combining the sub-encoder outputs to form an accurate, high-resolution position estimate. The sub-encoders can utilize edge modulation of a main grating track, slo... | 08/07/2007 |
| 7227329 | Wire-saving optical encoder having servomotor identification information A wire-saving optical encoder having servomotor identification information is applied to a wire-saving transmission design to provide a circuit and a method for processing servomotor identification information and encoded feedback control signals. With a microproces... | 06/05/2007 |
| 7224139 | Servo driver and encoder signal processing IC A servo driver (3) includes: an input section (11) for input-specifying the type of an encoder (7) at the side of an actuator (2); a control section (13) for generating a control signal (12) according to the type input; and ... | 05/29/2007 |
| 7221114 | Conveyance control apparatus and image forming apparatus A conveyance control apparatus controls an amount of movement of a carrier. A first encoder detects an amount of movement of the carrier and outputting a first signal. A second encoder detects an amount of movement of a drive member driving the carrier. A control pa... | 05/22/2007 |
| 7216585 | Shaftless motor drive for a printing press with an anilox inker An offset printing press includes a first plate cylinder, a first blanket cylinder for selectively contacting the first plate cylinder, an anilox inker for inking the first plate cylinder, and a first motor directly connected to the anilox inker for driving the anil... | 05/15/2007 |
| 7209862 | Self-diagnosing system for encoder A self-diagnosing system for an encoder. The system includes an encoder circuit for outputting information detected by an encoder; a data preparing section provided in the encoder circuit and preparing data representing a state of an abnormal-state judgment factor i... | 04/24/2007 |
| 7193204 | Multi-track optical encoder employing beam divider An optical encoder includes a sensor head, an encoder scale, and an optical wavefront dividing element. The sensor head includes a substrate, a light source, a first optical detector, and a second optical detector. The light source, the first optical detector, and t... | 03/20/2007 |
| 7187154 | Motor drive apparatus and electric power steering apparatus The present invention provides a motor drive apparatus capable of calculating an angular velocity and a rotation angle accurately in the entire rotation velocity range of a motor using a cheap Hall sensor having an inferior accuracy without using an expensive resolv... | 03/06/2007 |
| 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 |
| 7183730 | Method and apparatus for receiving and manipulating sheet material Disclosed are systems and methods for receiving and manipulating the travel of a sheet material, such as paper, from a device such as an imaging device. One embodiment of a system can be implemented as a system for handling a sheet material including a flipper devic... | 02/27/2007 |
| 7178412 | Encoder failure detection An encoder failure detector system and method for detecting failure of an encoder at near-zero rotational speeds. For example, in one embodiment a failure is indicated if a torque command exceeds a selected threshold for a selected period of time and no movement of ... | 02/20/2007 |
| 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 |
| 7141965 | Magnetic encoder system A magnetic encoder system according to one embodiment includes a magnetic sensor mounted on a first substrate above a magnetic medium, the magnetic medium carrying at least one magnetic track, the sensor detecting changes in the magnetic track during a relative move... | 11/28/2006 |
| 7132814 | Method of calculating correction value and method of manufacturing printer A correction value calculating method includes: preparing a printer including a motor, a PID control system for controlling the motor, and a memory for storing a correction value, the printer being configured to calculate a value of a current flowing through the mot... | 11/07/2006 |
| 7126786 | Motor/encoder assembly for tape drives A magnetic/encoder assembly has a compact design and combines the features of motor, encoder and chuck locating feature within a single motor housing. The motor/encoder includes a DC brushless motor with an inner magnetic rotor. The motor windings and the commutatio... | 10/24/2006 |
| 7117042 | Semiconductor device and method for controlling the same A semiconductor device, which is controlled based on a control signal corresponding to control data includes: a control register in which the control data is set; a sequencer which performs read control of a first control command on a nonvolatile memory in which the... | 10/03/2006 |
| 7102313 | Apparatus and method for providing protection to electric traction motor of vehicle An apparatus provides protection to an electric traction motor of a vehicle. The vehicle has a first powertrain and a second powertrain. The first powertrain includes an engine and it is coupled with a first set of road wheels. The second powertrain includes the ele... | 09/05/2006 |
| 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 |
| 7091473 | Measuring system for recording angular and linear absolute values An absolute measuring system for the determination of angles or paths is described. During normal operation the encoder of this system is fed by a voltage supply (mains). If the voltage supply fails the encoder is switched to an auxiliary power supply which uses les... | 08/15/2006 |
| 7088066 | Automatic output power limiting electrical device An eletrical device derives power from an incoming power source to produce output plower to drive the device. The device includes circuitry that determines at lehst one characteristic of the incoming power source, and adjusts the output power used to drive the devic... | 08/08/2006 |
| 7049780 | Door lock transmission element An auto-adjusting electric rear-view mirror includes at least two driving mechanisms for driving the rear-view mirror to deflect. The driving mechanisms are respectively coupled to servo control circuits that are further connected to sensor members. The servo contro... | 05/23/2006 |
| 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 |
