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 |
| RE39747 | Modular conveyor system having multiple moving elements under independent control The modular conveyor system comprises N interconnected track sections, forming a continuous track, wherein each track section features a plurality of individually controlled coils stretching along the length thereof. Plural pallets, each having thrust producing magn... | 07/31/2007 |
| 7166938 | Horizontal and vertical transportation system using permanent magnet excited transverse flux linear motors Disclosed herein is a horizontal and vertical transportation system using permanent magnet excited transverse flux linear motors which is capable of linearly transporting an object in the horizontal direction and in the vertical direction using permanent magnet exci... | 01/23/2007 |
| 7129603 | Corrosion protective coating for extending the lifetime of water cooled stator bar clips A water-cooled stator bar clip for electrical generators and a method for applying a corrosion-resistant protective coating, preferably Sc, Ti, Cr, Zr, Nb, Mo, Hf, Ta, W, Ni, and Al, and their alloys or oxides to existing stator bar end fittings in order to signific... | 10/31/2006 |
| 7129601 | Apparatus for controlled movement of an element A method and apparatus for supporting a movable member (10) with respect to a fixed member (40) is provided. The movable member (10) includes a magnetically permeable portion (81) contained therein and magnetic element (50) fixedly... | 10/31/2006 |
| 7116018 | Electric motor An oscillating motor has a rotor rotation of about ±15° from a rest position. The rotor has two salient poles which face a respective permanent magnet across a small air gap. The stator has a laminated stator core supporting the magnets and also two salient poles ... | 10/03/2006 |
| 7105956 | High precision z-theta stage A high precision z-theta stage having a horizontal translation axis (z-axis) and a rotary axis (theta-axis) parallel with the translation axis comprises parallel spaced apart linear translation stages, a carriage supported between the parallel translation stages, an... | 09/12/2006 |
| 7098562 | Ambidextrous electronic window lift motor A motor assembly 30 includes an electric motor 32 having a rotatable shaft 40, the shaft 40 having a worm 38; and a gear unit 33 operatively associated with the motor, the gear unit has first and second opposing ends. The ge... | 08/29/2006 |
| 7095190 | Arrangement for operating a contact roller and associated method for operating a contact roller An improved arrangement for operating a contact roller (7) and an associated method, characterized inter alia by the following features: a linear motor drive (14) is allocated to the contact roller (7) in order to change positon; a force adjustm... | 08/22/2006 |
| 7091679 | Magnetic thrust motor A motor is disclosed that uses magnetic propulsion for generating movement along a travel path in which the motor controller is mounted onboard the thrust block, thereby reducing connections the need for a remote motor controller. The motor includes a thrust rod ext... | 08/15/2006 |
| 7088018 | Electromagnetic drive type actuator An electromagnetic drive type actuator comprises a movable plate having a flat surface, a support positioned around the movable plate, an elastic member connecting the movable plate with the support, wirings extending through the support, the movable plate, and the ... | 08/08/2006 |
| 7084533 | Dual-function three-axis positioning system A dual-function, three-axis positioning system having a high precision z-theta state with a horizontal translation axis (z-axis) and a rotary axis (theta-axis) parallel with the translation axis and a second horizontal translation axis (x-axis) comprises parallel sp... | 08/01/2006 |
| 7084532 | Decoupling of actuators for positioning an object The invention provides an apparatus and a method for positioning an object coupled to a first support structure and a second support structure. A first actuator drives the first support structure along a first axis and a second actuator drives the first support stru... | 08/01/2006 |
| 7071584 | Linear motor A linear motor includes tubular outer yoke (4), tubular inner yoke (3) disposed in outer yoke (4), coil (2) provided to inner yoke (3), permanent magnet (5a, 5b) vibrating following a magnetic flux produ... | 07/04/2006 |
| 7071638 | Actuator control apparatus An actuator control apparatus is provided, capable of causing a state value which changes according to the action of an actuator to match a prescribed target value. A synchronizing mechanism is modeled as the collision of an inertial system object and an elastic sys... | 07/04/2006 |
| 7071583 | Uniaxial drive unit A uniaxial drive unit is provided with a tiltable pulse generating device having a joystick, which generates a continuous pulse of a frequency corresponding to the tilt angle of the joystick, and a rotary encoder having a knob, which generates a pulse of a frequency... | 07/04/2006 |
| 7067942 | Linear motor, moving stage system, exposure apparatus, and device manufacturing method A linear motor including a coil, a plurality of first magnet groups having polar directions disposed in periodically different directions, and a plurality of second magnet groups having polar directions disposed in periodically different directions. In a set includi... | 06/27/2006 |
| 7064464 | Electromechanical linear drive The invention relates to an electromechanical linear drive, in particular for an injection moulding machine, comprising an electric motor with a hollow-shaft rotor, open on one side, with a subsequent screw gear which converts the rotational movement of the hollow-s... | 06/20/2006 |
| 7057313 | Cooling of voice coil motors A voice coil motor used, for example, in a positioning device associated with either a first object table or a second object table in which the coil is cooled with a cooling jacket in thermal contact with the coil, the cooling jacket comprising at least one channel ... | 06/06/2006 |
| 7057314 | Electromagnetic motor system capable of removing heat away from its magnetic gap An electromagnetic drive motor assembly (EDMA) has at least one bridge that extends along a radial direction to conduct heat away from the magnetic gap and towards the outer surface of the EDMA. The EDMA includes a conductive ring between a first plate and a second ... | 06/06/2006 |
| 7042125 | Hydraulic fluid dynamic bearing incorporating an asymmetric journal bearing A fluid bearing design is provided which according to one aspect includes a shaft defining together with a surrounding sleeve an asymmetric journal bearing, and a thrust bearing at or near an end of the shaft towards which the asymmetric journal bearing is pumping, ... | 05/09/2006 |
| 7042118 | Permanent magnet rotor construction wherein relative movement between components is prevented A rotor construction may comprise a rotor with a centrally located permanent magnet section having aligned magnet segments and having a central hole throughout its length. A thin rod of magnetic steel is located in this central hole to support the permanent magnets ... | 05/09/2006 |
| 7038334 | High precision laser machining apparatus A high precision laser machining apparatus having a horizontal translation axis (z-axis) and a rotary axis (theta-axis) parallel with the translation axis comprises parallel spaced apart linear translation stages, a carriage supported between the parallel translatio... | 05/02/2006 |
| 7034415 | Pivoting mirror with improved magnetic drive A magnetic drive for providing pivotal motion to a functional surface, such as a mirror. The magnetic drive may be used to drive any torsional hinged device, but is particularly suitable for driving a torsional hinged mirror. According to a first embodiment, a dual ... | 04/25/2006 |
| 7034474 | Auto-calibration of attraction-only type actuator commutations A stage assembly (220) for moving a device (200) includes a stage (208), an attraction-only type actuator pair (426) that moves the stage (208), and a control system (24). In one embodiment, the actuator pair (426) in... | 04/25/2006 |
| 7034428 | Multi-set rectangular copper hairpin windings for electric machines An electric machine having multi-set rectangular copper hairpin windings comprises a stator having a plurality of partially closed stator slots. A first winding set and a second winding set are positioned in the stator slots. The first winding set and the second win... | 04/25/2006 |
| 7030531 | Controlled reluctance AC induction motor An electric motor operated by AC current, that includes a stator and a rotor supported for rotation about an axis relative to the stator. The stator is provided with field windings angularly distributed about the rotor axis and capable of producing a magnetic field ... | 04/18/2006 |
| 7030519 | Electrodynamic actuator An electrodynamic actuator has a permanently magnetic stationary part that forms an air-core with a magnetic field, and an armature with a coil arranged in the air-core. The armature moves in the magnetic field in the air-core dependent on a drive current fed to the... | 04/18/2006 |
| 7030518 | Position-control stage with onboard linear motor A position-control stage is disclosed which makes it possible to extend largely an angular movement in circular direction for position control, rendering the stage itself compact in construction, allowing to work with high precision in clean environment and further ... | 04/18/2006 |
| 7026731 | Linear motor glide assembly The present invention provides a linear motor and glide assembly for mounting a linear motor employing a unitary bearing rail structure and further providing heat compensation and compensation for thermal expansion, with further compensation provided to substantiall... | 04/11/2006 |
| 7026732 | Path arrangement for a multi-track linear motor system and method to control same A path for a linear motor system includes routing system between a trunk of the path and two or more branches. The routing system is operative to couple the trunk with a selected branch to enable a stage to travel between the trunk and the selected branch. The routi... | 04/11/2006 |
| 7023112 | Vibrating device for axially vibrating a movable member A vibrating device has an axially elongated frame, and a vibrating assembly including a hollow yoke. A magnetic driving device is provided for axially vibrating the vibrating assembly. A supporting shaft is provided for axially slidably supporting the vibrating asse... | 04/04/2006 |
| 7019421 | Modular linear electric motor with limited stator excitation zone and stator gap compensation A linear motor system including compartmentalized stator sections provides an interchangeable and serviceable alternative to other linear motors. The stator sections may be individually-energized so that power is only sent to stator sections adjacent to the thrust p... | 03/28/2006 |
| 7015622 | Control apparatus for vibration type actuator and electronic apparatus using it The present invention discloses a control apparatus for a vibration type actuator that can perform the drive of a driven member in a short time. The control apparatus for a vibration type actuator that excites vibration in a vibration body by applying a frequency si... | 03/21/2006 |
| 7012345 | Electromagnetic motor with flux stabilization ring, saturation tips, and radiator The present invention provides an electromagnetic drive motor assembly (EDMA) that has an inner flux return assembly formed from an upper pole piece and a lower pole piece oppositely disposed relative to each other along the center of the EDMA. An annularly position... | 03/14/2006 |
| 7005810 | Motor driving apparatus An apparatus for driving a linear vibration motor that employs a proper motor thrust constant value corresponding to each linear vibration motor at position calculation for obtaining the position of the mover of the linear vibration motor, thereby increasing the acc... | 02/28/2006 |
| 7005766 | Linear actuator, and production and inspection method thereof In a motor portion of a linear actuator, a rear end cap and a front end protrusion, which are disposed respectively at the rear and front ends of a stator assembly, and which include rear and front bearings to rotatably support a rotor assembly, are formed by inject... | 02/28/2006 |
| 7005811 | Bodily sensed vibration generator system A vibration generator system is capable of generating vibrations of a frequency that can be bodily sensed by humans, notwithstanding a small size, and making setting of a configuration of vibrations easy. When a drive signal composed of a set of an accumulation sign... | 02/28/2006 |
| 7004694 | Linear drive apparatus The conventional linear drive apparatus has the problem that in constructing a linear motor of a multiphase structure by connecting a plurality of armature units, the length of the armature becomes longer in proportion to the number of the phases, thus limiting the ... | 02/28/2006 |
| 6998738 | Plain surface stage apparatus A plain surface stage apparatus includes a platen having a plain surface, stationary type supports comprising at least three supporting members, and displacement type supports, each of which supports the platen and forms a displacement type supporting point at a pos... | 02/14/2006 |
| 6998737 | Lithographic apparatus and device manufacturing method A magnetic field distribution for a planar motor is described. The magnetic field distribution can either be generated by means of permanent magnets or one or more current carrying conductor. The planar motor can be applied in a lithographic apparatus for displacing... | 02/14/2006 |
