Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7656106 | Servo controller There is provided a servo controller for synchronously controlling a master side drive source to drive one drive axis and a slave side drive source to drive the other drive axis. The servo controller includes a correction data calculation means for calculating corre... | 02/02/2010 |
| 7271554 | Motor-driving circuit and recording apparatus including the same A motor-driving circuit drives a plurality of motors of different types. The motor-driving circuit includes a plurality of H-bridge circuits for outputting driving signals to the motors, a controller for controlling the plurality of H-bridge circuits, a setting sect... | 09/18/2007 |
| 7272524 | Method and a system for programming an industrial robot to move relative to defined positions on an object, including generation of a surface scanning program A method and a system for programming an industrial robot to move relative to defined positions on an object. The system includes a geometrical model of the object, the real object, and an industrial robot. A plurality of measuring points are generated corresponding... | 09/18/2007 |
| 7229504 | Methods and apparatus for determining scrubber brush pressure In a scrubber adapted to clean a semiconductor wafer, the torque of a brush rotation motor is monitored while a scrubber brush is in contact with the wafer and is being rotated by the motor. The position of the brush relative to the wafer may be adjusted based on th... | 06/12/2007 |
| 7210878 | Feed adaptation core drill A process for controlling and a core drilling machine (1) having an electrical motor (2) for rotational drive of a core drill bit (3) having cutting edges (5) oriented axial to a work piece (4), a feeding means (6) for gener... | 05/01/2007 |
| 7208894 | Electric vehicle motor and control system with high efficiency regeneration The present invention is an electric vehicle power system that uses multiple permanent magnet motor/generators connected in series or parallel and multiple battery step switching. Motor, torque and speed are controlled by steps in series connection and then in paral... | 04/24/2007 |
| 7183735 | Drive unit for controlling drives in machine tools or production machines A drive unit for controlling drives of machine tools or production machines includes a signal electronics unit, a startup/diagnostic unit, and an interface between the signal electronics unit and the startup/diagnostic unit. The interface has a data line for data ex... | 02/27/2007 |
| 7173395 | Inverter unit grounding method and inverter unit A circuit system that includes a sensor circuit for a sensor that detects the state of a motor is provided in an inverter unit for driving the motor. A 0V of the circuit system is connected with a shield braid of a shielded cable that connects the sensor circuit and... | 02/06/2007 |
| 7159482 | Electric actuator An electric actuator comprises a gear mechanism which transmits the rotary driving force of a rotary driving source, and a ball spline mechanism which includes a ball spline shaft provided movably back and forth from a connecting block to the outside and which conve... | 01/09/2007 |
| 7081040 | Tool sharpener with web thickness determination capability Method and apparatus for sharpening a tool, such as a drill bit. A tool sharpener includes a tool holder subassembly which retains and presents the tool against a grinding wheel subassembly. A sensor locates a cutting edge of the tool while the tool is retained by t... | 07/25/2006 |
| 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 |
| 6970108 | Encoder interface An encoder interface device that permits automatic discovery of an unknown encoder that is physically connected to the interface device, so as to enable correct operation. The device permits discovery of characteristics of an unknown encoder including the primary qu... | 11/29/2005 |
| 6960910 | Method for phase matching by detecting magnetic flux A method for phase matching matches a relative phase of a first element and a second element by detecting a magnetic flux. The method provides a magnetic flux generator to generate the magnetic flux. The method also provides a magnetic sensor in order to detect the ... | 11/01/2005 |
| 6961637 | On demand adaptive control system An adaptive control system and method for controlling the path feed rate to achieve a target spindle load during machine tool operations. The adaptive control system can provide load monitoring capability, which will actively monitor an incoming load signal from a s... | 11/01/2005 |
| 6909254 | Deceleration during mains break A method and an arrangement for stopping sectional drive controllably in connection with a fault situation in the supplying mains, the sectional drive comprising a plurality of inverters (4) which are supplied by a DC intermediate circuit (3) supplied ... | 06/21/2005 |
| 6759818 | Electromotive actuator and method for controlling the same To realize structure simplification and reduction in manufacturing cost without lowering power transmission efficiency and reliability. The present invention includes a first motor 5 and a second motor 6, and a lead 2 of a ball screw 12 i... | 07/06/2004 |
| 6404151 | Electric vehicle drive An electric vehicle drive has an electric machine which can be alternatively driven as a motor or as a generator and has a d.c. connection to which a supply voltage can be applied, from a first energy source and/or a second energy source. The first energy... | 06/11/2002 |
| 6342768 | Displacement apparatus arranged for guiding a carrying device along at least two rails A displacement apparatus comprising a first rail and a second rail, extending substantially parallel thereto, while on the first rail a first driving gear with a first motor is provided and on the second rail a second driving gear with a second motor is p... | 01/29/2002 |
| 6320346 | DCC decoder for model railroad An apparatus for controlling a model railroad locomotive includes a Digital Command Control (DCC) decoder and a power switch. The power switch selectively connects the railroad locomotive's motor to either the decoder or directly to an energy source, such... | 11/20/2001 |
| 6259222 | Device and method for regulating maximum loading on an electric motor in an aggregate feed replenishing system A device for controlling load on a first motor whose load is affected by a second motor, comprises a controller having a first input for being connected to a horsepower transducer connected to the first motor being monitored and an output for being connec... | 07/10/2001 |
| 6218793 | Plate glass snapping machine A machine for bend-breaking a glass plate 1 comprises: an endless belt 3 on which the glass plate 2 is placed; a supporting member 4 for supporting the endless belt 3; a glass plate receiving device 7 including a glass plate receiving surface 6 for receiv... | 04/17/2001 |
| 6191543 | Integrated circuit for multiple-axis position control The present invention is an integral-type IC for multiple-axis position control to provide highly integrated and modular design for the positioning control of automatic system. The inventive IC comprises a plurality of digital differential analyzers (DDA)... | 02/20/2001 |
| 6034491 | Universal fixture having shared drive assembly The present invention relates to an automatically reconfigurable contour checking fixture for comparing a component to a programmed contour. The fixture comprises a horizontal support table, having a length and width, wherein a drive rack runs along its l... | 03/07/2000 |
| 5952797 | Model vehicle, particularly model railway vehicle A model vehicle such as a model railway vehicle includes a control and evaluation device located in the model vehicle, and a plurality of drive devices such as electric motors for moving the vehicle and for operating other movable components on the vehicl... | 09/14/1999 |
| 5735646 | Interruptible feed rate drilling system In a system which interrupts the infeed signal generated by a CNC machine drive signals are applied to at least an RPM Control Electronics Module to drive the rotation of a cutting tool and the infeed drive motor electronics. A solid state relay intercept... | 04/07/1998 |
| 5491391 | Start up circuit for continuous sine-wave commutated brushless motors Automatic start up of a continuous sine-wave commutated, brushless, direct current motor in a predetermined direction is done by applying a ramped armature current to the direct current motor to generate an armature field. The resulting armature field is ... | 02/13/1996 |
| 5373495 | Disk playback apparatus A disk playback apparatus designed such that the linear velocity of the disk is stabilized during a short period corresponding to one to several revolutions of the disk and occurrence therein of vibration and noise is suppressed is disclosed. The apparatu... | 12/13/1994 |
| 5196769 | Motor control device The present invention relates to a motor control device using an inverter or inverters, in particular, it relates to a motor control device suitable for the prevention of inertial rotation of a motor or motors or for the maintenance of synchronized operat... | 03/23/1993 |
| 5184053 | Control device for a tool driving unit A control device for a tool driving unit is disclosed wherein a tool such as a tap or a drill is controlled to be rotated and axially moved by the control device. The tool driving unit has a spindle servo motor adapted to be driven according to a spindle ... | 02/02/1993 |
| 5165828 | Cam-actuated thread tapper An electronic thread tapper includes a cam-operated feed mechanism which drives the tap carriage rigidly in the advance direction only. Separate force means are employed to move the carriage in the retract direction when the tap is being withdrawn from th... | 11/24/1992 |
| 5087157 | Electromagnetic base drill with intermittent feed The states of contact switches are switched when a mode switch is turned on. If the drilling operation is effected by means of a drill motor in this state, an oscillation signal which is repeatedly set to "H" and "L" in a preset period corresponding to an... | 02/11/1992 |
| 5083074 | Method for error correction in synchronized superposed operation of servomotors In a method for performing a synchronized superposed operation of two servomotors, controllers for the servomotors perform the control for achieving the synchronized superposed operation by: calculating, for each of the servomotors, the difference, or dif... | 01/21/1992 |
| 5019763 | Learning control method in numerical control machine tool For controlling the rotation angle of a main shaft of a numerical control machine tool in synchronization with the position of a feed shaft, the learning control method according to the present invention comprises steps of reading the positional command v... | 05/28/1991 |
| 5010286 | Method of synchronous control of spindle motor and feed motor When a spindle (10) of a machine tool is rotated and moved relative to a workpiece linearly along an axis (Z) thereof during a machining process such as screw cutting, a spindle servomotor (12) and a feed servomotor (22), each of which is the primary driv... | 04/23/1991 |
| 4983899 | Numerical control apparatus for controlling a feed shaft and main shaft of a machine tool A numerical control apparatus is provided for controlling a position of a feed shaft in relation to a rotational angle of a main shaft of a machine tool. A value denoting the actual position of the feed shaft is subtracted from a positional command value ... | 01/08/1991 |
| 4914364 | Numerical control apparatus Disclosed herein is a numerical control apparatus for controlling drive spindle heads in a rectangular coordinate system of machining apparatuses such as a lathe, a miller, a laser beam machining apparatus, an electric discharge machining apparatus, a rob... | 04/03/1990 |
| 4879660 | Thread cutting machine with synchronized feed and rotation motors A thread cutting machine is provided with a control system in which, according to one aspect, the rotation of the spindle is controlled in the synchronous manner following up the feed amount of the spindle head and the rotation instruction is computed in ... | 11/07/1989 |
| 4866358 | Motor control circuit with vibration detector A motor control circuit for a machine, such as a granulator, having an intake adapted to receive parts to be machined. The motor control circuit detects the introduction of parts into the machine intake and automatically activates the motor for a predeter... | 09/12/1989 |
| 4813821 | Thread cutting machine A thread cutting machine where the rate of advance of the thread cutting tool is controlled by means of a control system whereby the rotation of the tool and its rate of advance toward the workpiece are both used to control the position of the cutting too... | 03/21/1989 |
| 4780654 | Control apparatus for drilling machine A drilling machine comprises an electric drill having a drill motor for rotating an annular drilling tool and a feed control motor for moving the annular drilling tool forward and backward with respect to a workpiece, both connected to an AC power source,... | 10/25/1988 |
