Famous Patents
The first commercial microwave oven was nearly 6 feet tall and weighed in at 750 pounds.
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 |
| 7437202 | System and method for control scheduling A system and method for controlling a device such that device operates in a smooth manner. The system may switch between control architectures or vary gain coefficients used in a control loop to control the device. As the architecture or gains are switched, the cont... | 10/14/2008 |
| 7124655 | Two-wire sensor for measuring a physical parameter To measure a physical parameter, a two-wire sensor produces pulse-width modulated signals (PWM) whose pulse width is preferably modulated as a function of the physical parameter to be measured. To indicate an error or a malfunction, the two-wire sensor provides an e... | 10/24/2006 |
| 7069923 | Apparatus and method of controlling fan motor in downdraft gas range Disclosed are an apparatus and method of automatically operating a fan motor when a grill is used in a downdraft gas range and, more particularly, an apparatus and method of enabling a user to arbitrarily adjust the wind during automatic fan motor operation. The pre... | 07/04/2006 |
| 7053582 | Control magnetic bearing device A control magnetic bearing device comprises a plurality of control magnetic bearings for contactlessly supporting a rotor, an electric motor for rotating the rotor, a magnetic bearing drive circuit for driving the magnetic bearings, an inverter for driving the elect... | 05/30/2006 |
| 7030579 | System and method for retrofit mechanism for motorizing a manual turret A mechanism for retrofitting a turret that has a manual rotation system with a motorized turret rotation system includes a gear box mechanically coupled to the turret, an electrically powered prime mover unit mechanically coupled to the gear box, a user operated con... | 04/18/2006 |
| 7002093 | Manual feed device in wire electric discharge machine A manual feeding device in a wire electric discharge machine in which selection between a jog feed and a step feed is made automatically without mode change. When an axis motion key is pressed, a timer measures the time for which the key is pressed. When the key is ... | 02/21/2006 |
| 6936982 | Device for actuating a plurality of electric motors Device for actuating a plurality of actuators (1) in a transportation device, which has a plurality of output stages (2, 3, 4, 5) and a control circuit for actuating the output stages (2, 3, 4, 5), the output stages (2, 3, 4, 5) each conn... | 08/30/2005 |
| 6741052 | Post-automatically determined user-modifiable activity performance limit apparatus and method In a control system (10) having a learning mode (20) such that performance limits can be automatically determined for subsequent use during normal operating modes (40), one or more user manipulable controls (18) are provided to allow a us... | 05/25/2004 |
| 6023142 | Recording and/or reproducing apparatus having an active mode activable by means of a drive motor A recording and/or reproducing apparatus (1) comprises a record carrier holder (8) into which a record carrier (7) can be loaded in a loading position of the record carrier holder (8) and which is movable by hand from its loading position into a switching... | 02/08/2000 |
| 5994864 | Robot controller A control apparatus and compliance control apparatus of a robot which performs operations while switching between a position control and a compliance control. When a transition from the position control to the compliance control is made, an integration op... | 11/30/1999 |
| 5925957 | Fault-tolerant magnetic bearing control system architecture A fault-tolerant control system for a magnetic bearing arrangement which maximizes dynamic response of the control system is disclosed. The arrangement includes a main digital signal processor responsive to rotor position/velocity signals to supply contro... | 07/20/1999 |
| 5909095 | Bemf zero-crossing detection system of a multiple-phase motor The invention relates to a method for detecting a threshold-crossing of a back electromotive force (bemf) measured in one phase of a multiple-phase motor, the one phase being set at a high impedance while at least one other phase is supplied by pulse-widt... | 06/01/1999 |
| 5751585 | High speed, high accuracy multi-stage tool positioning system A multi-rate positioner system (50) receives unpanelized positioning commands from a database storage subsystem (64), profiles the commands (72) into a half-sine positioning signal, and further processes the signal into a low-frequency positioning signal ... | 05/12/1998 |
| 5723963 | Apparatus and method for controlling transition between PWM and linear operation of a motor A motor drive control circuit for operation in both linear and PWM modes includes a switchably connected compensation network. The compensation network has a capacitor that provides control loop compensation. To avoid transient effects during the settling... | 03/03/1998 |
| 5545958 | Merchandise display system A merchandising system for holding items, such as compact discs, is disclosed. The system includes a base on which several item holders are rotatably mounted. Each item holder is configured to receive at least one and preferably a plurality of items arran... | 08/13/1996 |
| 5469356 | System for controlling a vehicle to selectively allow operation in either an autonomous mode or a manual mode A system for controlling autonomous operation of a vehicle in response to speed and steering angle request signals from a navigator allows manual operation of the vehicle. The system includes a machine control module, an engine control module, and a trans... | 11/21/1995 |
| 5408230 | Remote control system for marine propulsion unit A remote control system is provided for transmitting control movement from a remote control unit to a controlled element which includes a throttle or transmission control lever on a marine propulsion unit. An operator is associated with the remote control... | 04/18/1995 |
| 5384524 | Voice coil motor control circuit and method for servo system control in a computer mass storage device A voice coil motor ("VCM") control circuit controls operation of a VCM which positions a disk drive head/actuator arm assembly. A data processor is continuously updated with the current position and relative radial velocity of the disk drive head/actuator... | 01/24/1995 |
| 5378968 | Manipulator A manipulator whose economic efficiency and reliability are raised by reducing the size and weight of the system through the backup by a common specification drive circuit and actuator when a fault occurs is provided. Thus, the actuator of the end effecto... | 01/03/1995 |
| 5247234 | Control arrangement The invention relates to an electric control arrangement for generating analog manipulated variables, having at least one basic controller circuit having a particular controller structure. The transfer function of the basic controller circuit, which is de... | 09/21/1993 |
| 5241250 | Servomotor control system for multi-axes A servomotor control system for multi-axes in which a single servo-amplifier can operate m rotational speed control loops and m current control loops as well for m servomotors simultaneously, where m is a predetermined integer greater than unity, while a ... | 08/31/1993 |
| 5184122 | Facility management system with improved return to automatic control There is disclosed a control system for use, for example, in facility management which controls an environmental parameter to maintain the parameter at a given set point. A PID Controller is coupled to a remote sensor for generating a feedback signal resp... | 02/02/1993 |
| 5065079 | Method and apparatus for controlling lumbar support device A method and apparatus for controlling a lumbar support device provided in the seat back of an automotive seat. The control for support against the lumbar of an occupant on the seat is effected through manual and automatic control modes, and the automatic... | 11/12/1991 |
| 4774674 | Manual operation system for machine controlled by numerical control apparatus Disclosed is a manual operation system for a machine controlled by a numerical control apparatus (1). The same operation pattern as in an automatic operation mode can be manually performed according to the manual operation system. When a programmable cont... | 09/27/1988 |
| 4669042 | Stepless pulse count switching An up-down counter is fed pulses generated manually and/or automatically from either or any of two or more command sources. Gating circuitry ahead of the up-down counter may be used to enable counts from only one source at a time. The output of the counte... | 05/26/1987 |
| 4642540 | Robot control systems During demonstration of a job sequence by an operator, an image error signal generated by a camera raster, is fed into a register, where it corrects the actual raster position, which is then stored in a data store. A tachometer signal from a joint of a mo... | 02/10/1987 |
| 4641070 | Device for determining and adjusting the position of a web A device for determining and adjusting the position of a web, the device having two sensor units each with a respective light source element directed towards the web and a respective photoelectric sensor element responsive to reflected light, a control un... | 02/03/1987 |
| 4599547 | Fine-coarse positioning control system with easy adjustment A system and method are disclosed for precisely positioning a movable member to a desired fine position after a selected coarse position is reached. In a preferred embodiment of the invention a processor-controlled typewheel servo control system is respon... | 07/08/1986 |
| 4591771 | Numerical control system In order to permit manual operation under a condition where the axial direction of a tool and the direction of a hole to be machined in a workpiece are held in agreement, the tool of a radius γ is rotated by θ in the vertical rotational direction and by... | 05/27/1986 |
| 4537259 | Blade control device A blade control device comprises a change-over switch for providing light receiving position deviation signal sent out from a light receiving device into a light receiving device control system as a command value, and a device for measuring the change in ... | 08/27/1985 |
| 4533990 | Computer process control system A computer process control system includes at least one control section which is housed in a case and connected to a detection terminal and which automatically produces an operation signal for compensating for a difference between a process variable and a... | 08/06/1985 |
| 4521845 | Numerical control device A control device for a numerically controlled machine tool includes both on/off and continuously variable switches which are coupled via a computer to associated machine functions such as coolant flow or feed rate. The computer is programmed to operate in... | 06/04/1985 |
| 4510427 | Method and apparatus for controlling feed speed in numerical control system A method and apparatus for controlling the feed speed of a machine in a numerical control system having a manual pulse generator for generating pulses in response to a manual operation. The numerical control system numerically controls the machine by supp... | 04/09/1985 |
| 4509000 | Bumpless feedback switching apparatus for use in a servo system Apparatus, for use in a servo-control system and which provides a smooth "bumpless" transition while switching from one transducer feedback signal to another, is described. Specifically, with this apparatus, a plurality of tracking signals are first produ... | 04/02/1985 |
| 4497028 | Numerical control system A numerical control system in which a numerical control device is adapted to control a machine tool equipped with a plurality of tables, as one example, on which workpieces may be secured to be machined by a tool mounted on a head. A table which is not be... | 01/29/1985 |
| 4469994 | Reference signal circuit In the control of prime movers, automatic and manually generated input signals should be able to be entered into the control system without undue control disturbance or perturbation. Likewise should an automatic signal fail, the switch to a last valid sig... | 09/04/1984 |
| 4458189 | Control mode switching circuit A "mode switch" is used for smoothly switching a servovalve controlled device such as an SMC press, in particular, from control under one parameter to control by another. The mode switch provides a very smooth transfer of control from displacement control... | 07/03/1984 |
| 4451879 | Circuit for providing a common setpoint for manual and automatic regulation of a process control system A circuit for providing a common setpoint for both automatic and manual operation of a process control system includes a process controller. A parameter of the process can be changed by changing the output of a controller. A variable input voltage to the ... | 05/29/1984 |
| 4333043 | Electrical control circuit for controlling a D.C. solenoid Improvement in an electrical control circuit for controlling a D.C. solenoid having a plunger and a manual control potentiometer, a feedback potentiometer and a comparator for comparing the signal voltages from the potentiometers so that the movement of t... | 06/01/1982 |
| 4283670 | Automatic integrator control for transientless switching of _controller gains in manual tracking systems A system for performing target acquisition and tracking under the control a human operator. The system has a slewable sensor with a line of sight and includes apparatus for slewing the sensor to align its line of sight with a target, the difference betwe... | 08/11/1981 |
