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| Number | Title | Issue Date |
| 7362068 | Closing member control system A controller reduces an output of the drive motor when a window glass reaches a speed shift position, which is between a fully open position and a fully closed position of the window glass, in a closing operation of the window glass. The controller increases the out... | 04/22/2008 |
| 7023161 | Power regulated window The present invention is to provide a power regulated window having a window glass to be closed intentionally when some foreign body is pinched by the window glass for security reasons. When a close signal is output to a semiconductor switching element from window r... | 04/04/2006 |
| 6975087 | Closed-loop control system A control system for operating a device. The control system comprises a plurality of command elements generating command signals and a control element having a plurality of control modes. Each control mode includes a transfer function output effective to operate the... | 12/13/2005 |
| 6759817 | Window lifter system and method of controlling a plurality of window lifters A window lifter system comprises a first window lifter motor and a master control device for the first window lifter motor. The master control device is able to detect a position of a window pane driven by the first window lifter motor and to drive the first window ... | 07/06/2004 |
| 6756762 | Method and actuation control for stopping an electrical drive, by means of closed-loop position control, in a predetermined nominal position The invention reduces the oscillation of the rotation speed regulator when stationary—despite low position resolution and a high minimum rotation speed resulting from this—by switching the closed-loop control structure, when the drive is moved into the nominal p... | 06/29/2004 |
| 6705533 | Digital modulation for a gas-fired heater A method is disclosed for operating a gas-fired heater to maintain temperature within a zone. The gas-fired heater is modulated between a higher firing rate and a lower firing rate within a pseudo steady-state mode until a current firing rate exceeds a predetermined... | 03/16/2004 |
| 5998955 | Pulse-motor driving apparatus For efficient pulse motor drive over a wide speed range, two drive-current control methods are switched in accordance with the speed of the pulse motor. As the first method, a PWM control method generates a pulsewidth modulation signal in accordance with ... | 12/07/1999 |
| 5389868 | Drive control apparatus for driven machine and parameter display method in drive control apparatus for driven machine A drive control apparatus for a driven machine is designed to easily check which of a plurality of parameters indicating the control characteristics of the driven machine have been changed from their factory-set initial values. Initial parameter values ar... | 02/14/1995 |
| 5200681 | Process control system A control system is provided for controlling a process system subject to an external disturbance by adjusting the value of a control amount output from the process system to a given target value. The system includes a target value generating unit for gene... | 04/06/1993 |
| 5127063 | Processor for pattern data, measured process information, and image information In order to easily identify a pattern of time-series state changes based on measured information so as to facilitate representation of edge portions of an image, features extracted in a form of expansion coefficients of polynomials from the measured infor... | 06/30/1992 |
| 4982145 | Method and apparatus for the optimization of thyristor power supply transport time delay A digital current control arrangement for optimizing the transport time delay of a thyristor power supply used as a source of armature current for a DC motor utilizes a coarse gate angle interrupt subroutine to perform a preliminary calculation of the gat... | 01/01/1991 |
| 4977360 | Method and circuit for controlling a position-controlling DC motor and a system for controlling linear displacement in accordance with the method The present invention is drawn towards a method and a circuit for controlling a position-controlling DC motor, a system for controlling DC motor, and a system for controlling linear displacement in accordance with the method. The motor (3) has a shaft and... | 12/11/1990 |
| 4716348 | DC motor adaptive controller A method for operating a DC motor controller according to a first gain when the armature current of the DC motor is discontinuous, according to a second gain when the armature current is continuous, and according to a third gain when the armature current ... | 12/29/1987 |
| 4456934 | Linear positioning system A linear servo system including a linear motor with a moving permanent magnet the flux of which interacts with current flow through a stator winding. A position servo loop controls the position of the permanent magnet and preferably includes a position tr... | 06/26/1984 |
| 4443157 | Control circuit for a liquid fuel combustion apparatus A control circuit for a liquid fuel combustion apparatus which employs a differential amplifier and square-wave generator to maintain a strong constant combustion in the burner until the differential amplifier senses that room temperature has approached a... | 04/17/1984 |
| 4412164 | Lens system driving device A lens apparatus for moving one or more moving lenses of a lens system up to the end position of movement by a servomotor. The lens apparatus limits the moving speed of the moving lens or lenses to a value under a predetermined level. Also, the lens appar... | 10/25/1983 |
| 4339699 | Motor control system for use in an apparatus for performing tests and measurements on liquid samples There is provided a motor control system adapted for use, for example, with a sample analyzer, having means for generating signals representative of motor movement, and a logic circuit for analyzing the motor movement signals to determine increments of mo... | 07/13/1982 |
| 4328451 | Device for controlling the electric drive motor of a window raiser in particular in an automobile vehicle The device comprises for each window an electric driving motor and a selector which is adapted to ensure the selective supply of current to the motor, in one direction or the other, through a control circuit acting on a supply source. The supply source is... | 05/04/1982 |
| 4295082 | Pulse width modulated servo circuit A motor servo circuit is disclosed. The motor in the motor servo circuit is driven by an output which is obtained by logically adding output pulses of a pulse stretcher circuit which stretches a pulse width of error pulses generated from an OR circuit whe... | 10/13/1981 |
| 4206392 | Spindle control system In a spindle control system in which a pulse coder is coupled with a spindle; a pulse train signal, derived from the pulse coder upon each rotation of the spindle through a predetermined rotational angle, is converted into an analog signal corresponding t... | 06/03/1980 |
| 4193022 | Analog/digital numerical control system An analog/digital numerical control system that utilizes analog techniques to process large scale (macro) differences and digital techniques to process small scale (micro) differences. In this manner, advantage is taken of the respective virtues of both a... | 03/11/1980 |
| 4143415 | Multiple control circuit with floating setpoint A process control system providing a particular control effort function is divided into a primary control effort portion having a primary controller, and a feed back from the controlled process to the primary controller, and a secondary control effort por... | 03/06/1979 |
| 4072268 | Heating control system A heating control system for automatically controlling the temperature within a space is provided. The heating control system includes a temperature sensor for detecting changes in temperature without the space and in response thereto producing a control ... | 02/07/1978 |
| 4028604 | Servo-motor control system A servo-motor control system varies a set point input signal to a comparator between predetermined limits in order to establish three detectable output conditions. When the difference between the feedback signal and the set point signal exceeds the averag... | 06/07/1977 |
| 4006394 | Coarse and fine control for position servo A closed loop servo system for positioning a head relative to a magnetic recording element wherein track crossings are normally utilized to generate a feedback signal to the servo for positioning the head and wherein for a precise indication of head posit... | 02/01/1977 |
| 3953774 | Control method of a DC motor A control method of a DC motor is described which comprises a digital control method and an analogue control method, wherein a rotor of the DC motor rotates with high speed under the digital control method until the rotating angle of the rotor comes close... | 04/27/1976 |
| 3944896 | Phase synchronization system with start-up sequencing and automatic shut-down A system for providing a predetermined phase relationship between signals representing the operation of first and second moveable members, the operation of said first moveable member being regulated in accordance with the operation of said second moveable... | 03/16/1976 |
