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| Number | Title | Issue Date |
| 7038336 | Construction of power assisting synchronous motor An improved synchronous electric motor incorporating a stator and large current terminal unit made into a single unit with solidified molding resin thus a separate casing is unnecessary and thus the constitution is simplified. The large current terminal unit and a m... | 05/02/2006 |
| 6975055 | Dynamo-electric machine having a rotor with first and second axially or rotationally displaceable field magnets A dynamo-electric machine has a stator with a primary winding and a rotor with a field magnet and a shaft. the field magnet includes a first field magnet having diferent polarity magnetic poles sequentially arranged in a rotation direction and a second field magnet ... | 12/13/2005 |
| 6967422 | Rotary actuator A two-position rotary actuator provides a latching or holding torque which can be adjusted by altering the magnetic properties of a selected pole member. The actuator also functions as a sector motor over a selected range of angular motion and provides failsafe oper... | 11/22/2005 |
| 6907794 | Torque measuring apparatus for rotating body A torque measuring apparatus includes a rotor having a hollow body portion formed between a drive-side flange portion and a load-side flange portion. Light emitting elements are disposed on a periphery of the rotor, for emitting optical signals based on an output fr... | 06/21/2005 |
| 6265794 | Method for tuning the resonant frequency of crossed-flexure pivot galvanometers A stator is adjustably attached to the frame of a crossed-flexure pivot galvanometer. The stator acts on a permanent-magnetic rotor, having radially facing poles, causing the rotor to torsionally oscillate, which causes the rotor to be displaced from an a... | 07/24/2001 |
| 5866962 | Rotor position detecting apparatus in switched reluctance motor A switched reluctance motor is provided with a rotor position detecting apparatus for detecting a rotor position wherein the apparatus comprises a rotor position-sensing mechanism removably mounted in a ventilator hole formed in a side wall of a motor hou... | 02/02/1999 |
| 5753985 | Electric motor with oscillating rotary output and controlled amplitude Disclosed is an AC electric motor with oscillating rotary output, a permanent magnet rotor having radially magnetized magnets, and feedback control of oscillation amplitude. Amplitude control is accomplished without a separate amplitude sensor by using an... | 05/19/1998 |
| 5717266 | High power oscillatory drive An oscillatory drive incorporating the invention includes a driven rotor that is mounted on a shaft and includes plural driven permanent magnets disposed thereon. A spring arrangement is coupled to the driven rotor and limits both clock-wise (CW) and coun... | 02/10/1998 |
| 5369322 | Electromagnetic motor of the finite rotational type An electromagnetic motor of the finite rotational type has an improved rotor-returning mechanism for exerting a magnetic force to return its rotor to the initial angular position in a non-excited condition. The rotor-returning mechanism is comprised of a ... | 11/29/1994 |
| 5305169 | Rotary actuator disk drive A rotary actuator disk drive in which the rotary actuator is driven by a motor comprising a movable coil and a stationary permanent magnet structure producing a magnetic field which links the coil. The rotary actuator comprises a load beam arm stack and a... | 04/19/1994 |
| 5038062 | Swing-arm type linear d.c. brushless motor Disclosed herein is a swing-arm type linear d.c. brushless motor, wherein at least one coreless type armature coil such as an air-core armature coil is arranged on the inner wall of a linear motor body and a field magnet is formed by magnetizing a magnet ... | 08/06/1991 |
| 5025201 | Segmented resolver This electrical resolver has an arcuate stator with a concave inner side concentric to a convex side of an angularly rotatable arcuate rotor limited to rotation within outer ends of the stator. The stator and rotor have arcuate magnetic cores with transve... | 06/18/1991 |
| 4523114 | Magnetic reciprocating motor A magnetic reciprocating motor including a block with a crankshaft journalled therein and a cylinder with inboard and outboard portions mounted thereon. A piston with a piston magnet is slidably disposed in the cylinder inboard portion. A carrier assembly... | 06/11/1985 |
| 4520286 | Appliance driven by an electric motor An electrically driven appliance such as a citrus press comprises a drivable tool; a self-starting single-phase synchronous motor including a diametrically magnetized permanent-magnet rotor forming a rotor field and positioned between two stator poles for... | 05/28/1985 |
| 4315170 | Reversible electric motor An electric motor having an output shaft that rotatably oscillates automatically, the motor comprising a pair of reversing terminals, a reversing switching mechanism for connecting the first reversing terminal to a plus terminal connected to a source of e... | 02/09/1982 |
| 4177395 | Actuators This invention relates to an electrically operated actuator for quarter-turn valves, such as butterfly or ball valves. The actuator includes a single phase 2-pole dynamo-electric machine comprising a stator having three windings and a rotor having a plurality ... | 12/04/1979 |
| 4121416 | Miniature grandfather clock A simulated clock apparatus utilizes a housing having an opening therein and a shelf disposed in the housing below the opening. A conventional wristwatch is adapted to be rested on the shelf so as to have the face of the clock exposed for external viewing... | 10/24/1978 |
| 4016439 | Magnetically activated oscillatory motor A magnetically activated oscillatory motor comprises a pendulum pivotally mounted on mounting means, a pendulum magnet mounted on the pendulum with its poles aligned in the direction of pendulum movement, and first and second electromagnets mounted on the... | 04/05/1977 |
| 3976923 | Pattern generating apparatus Integrated circuit mask patterns are laser machined by mounting substrates on a support that is periodically stepped in a y direction after each scan by a laser writing beam in an x direction. X-direction scanning is accomplished by mounting a mirror on a... | 08/24/1976 |
| 3971963 | Electomagnetic rotary motion device and exposure control device using the same Herein disclosed is an electromagnetic rotary motion device including permanent magnets establishing a pair of spaced concentric and coextensive circular or semicircular air gaps and a rotor unit including armatures which are movable in a circular path in... | 07/27/1976 |
| 3970980 | Rotary actuator having stationary armature and rotary field A rotary actuator provides rotation of its rotor over predetermined angles. The rotor is a cylindrical housing in which are cylindrically curved permanently magnetized poles spaced apart at their ends and surrounding a fixed armature. The armature has mag... | 07/20/1976 |
