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| Number | Title | Issue Date |
| 7652439 | Changeover device of pull cord control and wireless remote control for a DC brushless-motor ceiling fan A change-over device of pull cord control and wireless remote control for a DC brushless-motor ceiling fan is to have a driver installed in a ceiling fan basic body, and the driver has a detecting unit for detecting whether or not a connector positioned in a hanging... | 01/26/2010 |
| 7462998 | Apparatus and method for generating acceleration profile for controlling object using optimized waveform shaping A technique is disclosed for generating an acceleration profile indicative of a time history of an acceleration of a controlled object, to thereby generate at least one of a target velocity profile indicative of a time history of a target velocity of the controlled ... | 12/09/2008 |
| 7397211 | Motor control apparatus A motor control apparatus includes a first FG pattern for generating a first induced voltage attendant upon rotation of the rotor of a motor; a second FG pattern for generating a second induced voltage due to noise; a differential amplifier for differentially amplif... | 07/08/2008 |
| 7208897 | Motion control system for barrier drive A system for operating a barrier system such as a garage door, gate or fence. A DC motor is connected to and operates a barrier drive. A power amplifier is configured to receive power signals from a power supply and to output modulated DC signals to the DC motor. A ... | 04/24/2007 |
| 7116073 | Methods and apparatus for controlling a motor/generator Methods and apparatus provide for: commutating windings of a polyphase machine such that electromagnetic fields of stator and rotor phases of the polyphase machine produce at least one of motoring and generating torque; providing a first rotor excitation voltage hav... | 10/03/2006 |
| 7068006 | Stepping motor control circuit At the start of driving a stepping motor, a CPU sets the switching widths of the first through eighth states in a pulse width setting register, sets the switching counts of the first through eighth states in a pulse switching count register, and sets the start of dr... | 06/27/2006 |
| 7065856 | Machine tool method A machine tool apparatus is provided employing a plurality of tool heads which may be sequentially or simultaneously automatically controlled to perform preprogrammed operations on either the same or different workpieces. In one form, a plurality of tool heads are s... | 06/27/2006 |
| 7023153 | Motor control device It is an object of the invention to regulate a control gain without requiring a host controller. In the invention, a command pattern generating section (14) generates a basic operation pattern for operating a motor based on various parameters such as a... | 04/04/2006 |
| 6954040 | Method of controlling a reciprocating linear motor A free piston gas compressor comprising a cylinder, a piston reciprocable within the cylinder and a reciprocating linear electric motor derivably coupled to the piston having at least one excitation winding. A measure of the reciprocation time of the piston is obtai... | 10/11/2005 |
| 6949905 | Servo control system and method of setting A servo control system which comprises an original cam pattern generator 11 for generating a first pattern of a cam shape relative to a phase corresponding to one revolution of a cam mechanism; a corrector 14 for differentiating the original pattern of... | 09/27/2005 |
| 6914402 | Method for synchronized operation of machines having axes actuated by single drives In a method for operating machines (138) with a plurality of shafts (102, 110, 111), in which the shafts (102, 110, 111) are each driven, synchronized with one another, by individual drive mechanisms (103) belonging to them, in accordance... | 07/05/2005 |
| 6911792 | System and method for controlling movement A system and method for controlling movement of a body includes a position-based velocity profile, at least one mover, a data processor for calculating a next position of the at least one mover using data from the position-based velocity profile and passing a next p... | 06/28/2005 |
| 6815923 | Stepper motor jam detection circuit Methods, devices and circuits for detecting malfunctions in stepper motors. A signal from a driver circuit to a stepper motor that is proportional to the current in the windings of the stepper motor is detected. This signal is then amplified and integrated for ease ... | 11/09/2004 |
| 6815918 | Pool cleaning method and apparatus A method for cleaning the bottom of a pool uses an automated programmed pool cleaner capable of reversing movement and turning that is initially placed at an arbitrary location on the bottom of the pool and moved in a forward direction until it encounters an upright... | 11/09/2004 |
| 6710567 | Velocity dependent reference profile for spindle motor acceleration control Method and apparatus for accelerating a disc drive spindle motor to an operational velocity at which data are transferred between a host device and a disc rotated by the spindle motor. The spindle motor is initially accelerated from rest to an intermediate velocity ... | 03/23/2004 |
| 6646407 | Electric motor control having DC-DC converter and method of using same A controller for use in a switched reluctance (SR) motor drive is provided. The controller includes a DC--DC converter coupled to an inverter. The DC--DC converter can be a buck converter, a boost converter, or a buck-boost converter. The control paramete... | 11/11/2003 |
| 6483265 | Methods and systems for minimizing vibration in electric machines Methods and apparatus for minimizing electrical machine vibration are described. In an exemplary embodiment of the method, power is applied to the motor under microprocessor control such that a pulse modulated current profile is applied to the motor which... | 11/19/2002 |
| 6456022 | Movable barrier operator A movable barrier operator having improved safety and energy efficiency features automatically detects line voltage frequency and uses that information to set a worklight shut-off time. The operator automatically detects the type of door (single panel or ... | 09/24/2002 |
| 6407520 | Motor-vehicle door lock A motor-vehicle door latch to avoid unnecessary sound emission, has its motor operated with pulse-width modulation so that, once a blockade time point is reached or prior thereto, the motor is energized with reduced power so that it generates a ramp chara... | 06/18/2002 |
| 6020698 | Timer for use with an electronic control in controlling an appliance A hybrid control for a clothes dryer which combines an electromechanical timer and a microprocessor. The electromechanical timer has a plurality of switches connected to a plurality of input ports of the microprocessor. The timer switches are driven by a ... | 02/01/2000 |
| 5592057 | Step motor and servo motor indexer A step motor and servo motor indexer (10) having an improved user interface (14) wherein an input capability for programming a full range of program parameters and values is provided, yet where the user input system (20) has few components. The user input... | 01/07/1997 |
| 5587633 | Press control method and press apparatus It is an object to obtain a press apparatus and a press controlling method which apply press working to a processed object with accurate press load and is capable of press working with accurate press load without affected by variations in thickness of the... | 12/24/1996 |
| 5528229 | Thermostatically controlled remote control for a ceiling fan and light An apparatus and method for thermostatically controlling the operation of a multiple speed fan and light assembly by inputting a desired temperature range and airflow direction for each fan speed and by inputting a single number for controlling the on tim... | 06/18/1996 |
| 5381080 | Control device A control device, particularly a rotary controller for manual entry of information into an electronic device, has a setting member the position of which can be changed under the effect of an actuating force. The setting member is connected with a generato... | 01/10/1995 |
| 5304901 | Rotation control device for sewing motor When a sewing machine is locked during stitching of a thick fabric, the rotational direction of a sewing motor is alternately reversed at a predetermined time interval. A needle operatively coupled to the sewing motor through a mechanical system is moved ... | 04/19/1994 |
| 4916372 | Control system for school bus safety device Apparatus for activating a safety device hingedly mounted on a shool bus to swing it out to an outstretched position when the bus door is opened and to return the device to its retracted position when the bus door is closed. The system includes a control ... | 04/10/1990 |
| 4715476 | Reset mechanism responsive to loss of torque Reset mechanism comprises a base, a spring arm rotatable about an axis through the base, and an extension spring fixed to the base at one end and the spring arm at the other end. The spring passes around two ball bearings on studs on the base to permit us... | 12/29/1987 |
| 4398348 | Device for measuring movement of material using a wheel rolling on the material A measuring device for measuring the distance of feed of cloth in a sewing machine, comprising a wheel driven by the cloth without slippage and located at the presser foot. A plurality of slits on the wheel are arranged to cooperate with two slits in the ... | 08/16/1983 |
| 4296365 | Method and apparatus for correcting errors of feeding of endless belt in automatic screen printing In an automatic screen printing machine of the roller intermittent drive type, errors of feeding of an endless belt by a driving roller are effectively eliminated by preliminarily correcting feed errors owing to unevenness of the thickness and elongation ... | 10/20/1981 |
| 3991652 | Educational device for teaching numerical control An educational device for teaching the principles of numerical control includes a machine tool having three-axis movement with a predetermined fixed rate of movement along each axis. A control tape is driven at a predetermined fixed rate which is faster t... | 11/16/1976 |
| 3979647 | Inductively coupled lock An inductively coupled electronic lock system wherein the key has a clock driven variable pulse width generator with alterable pulse sequence input to an inductor. The lock part of the system has an inductive pick-up which discriminates against all but a ... | 09/07/1976 |
| 3957188 | Punched tape control system In an apparatus for performing various operations on stock material, such as advancing, feeding, measuring, cutting and the like, all under the control of a program on a punched tape, an improved punched tape control system wherein the sprocket holes, whi... | 05/18/1976 |
| 3934186 | Program control system for robots for industrial use A program control unit for industrial robots comprising programming means to check instructions from arm-position memory means in which the arm motions are set by means of an arm-position selecting circuit and generates arm-position setting signals and al... | 01/20/1976 |
