Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 7956505 | Rotor of electric motor for simplifying manufacturing process and electric motor having the same A rotor of an electric motor includes lamination core formed by laminating a plurality of individual cores, and at least one pair of magnet members that generate rotating torque by electromagnetic interaction with a stator, are provided at the lamination core such t... | 06/07/2011 |
| 7304446 | Sensorless and brushless DC motor A sensorless and brushless motor is disclosed including a stator, a rotor, a control circuit and an induction coil (50). The stator includes a stator core (30) and a stator coil (34) wound around the stator core. The rotor includes a rotor magne... | 12/04/2007 |
| 7262535 | Rotor shaft for limited rotation motors and method of manufacture thereof A limited rotation motor system that includes a rotor is disclosed wherein the rotor includes a sleeve with a first open end and an a second end having an integral closed end element, and a permanent magnet that is received through the first open end of the sleeve. ... | 08/28/2007 |
| 7064465 | Motor Motors for fans are provided. The motor includes a stator and a rotor. The stator includes a plurality of magnetic poles. The rotor is coupled to the stator and includes a magnetic structure with a plurality of magnetic poles. Each magnetic pole has an interpolar po... | 06/20/2006 |
| 7049723 | DC motor The disclosure describes a DC motor including a rotor unit arranged within the motor body and has a cylindrical field magnet fixed to an outer surface of a holder. The holder has a rotating shaft press-fitted through the center, and the cylindrical field magnet has ... | 05/23/2006 |
| 7019516 | Magnetic sensor unit less responsive to leaking magnetic flux A magnetic sensor unit includes an actuator motor and a magnetic position sensor. The actuator motor has a magnetic circuit including motor magnets. The magnetic position sensor includes a sensor magnet and a hall element for detecting magnetic flux. Magnet clearanc... | 03/28/2006 |
| 6974522 | Method and apparatus for mounting a plurality of magnet segments on a back ring A method and apparatus for assembling permanent magnet segments and a back ring wherein a fixture holds segments in circumaxially spaced relationship, adhesive is applied to the segments, externally from pressure sensitive adhesive tape and the fixture then expands ... | 12/13/2005 |
| 6954014 | Motor with frequency generator and office automation equipment using same The invention relates to a motor with a frequency generator attached thereto, equipped with the frequency generator (FG) for detecting a rotational speed of the motor. The motor with the frequency generator attached thereto comprises a magnet having 10 poles of main... | 10/11/2005 |
| 6903475 | Stator assembly with an overmolding that secures magnets to a flux ring and the flux ring to a stator housing A stator assembly for an electric motor includes a stator housing, an expandable flux ring inserted into the stator housing and a plurality of magnets on an inner surface of the flux ring. Overmold material is molded around the magnets in the flux ring, such as by i... | 06/07/2005 |
| 6891295 | Flywheel magneto generator A flywheel magneto generator which comprises a rotor having a magnet attached to an outer circumferential side of a flywheel and a stator constructed by winding a generating coil around a core having a magnetic pole portion opposed to a magnetic pole of the rotor, w... | 05/10/2005 |
| 6867523 | Brush motor A brush motor has a magnetic sensor provided for detecting a change in a field magnet occurring in correspondence with a change in a rotational position of a rotor core. ... | 03/15/2005 |
| 6858956 | Magnetic pole position detector for rotor A rotor (17, 31, 71, 91, 101, 121, 131, 141, 201, 401) of a motor (13, 51) is provided with a rotation shaft (21, 59, 410) and a plurality of magnets (15, 53, 75, 105, 210A, 210B, 411) on a circular periphery. Plates (25,... | 02/22/2005 |
| 6819022 | Brushless motor for power tool It is an object of the present teachings to provide a technique that rationalizes the structure of the brushless motor so as to save space in the power tool. According to the present teachings, a representative brushless motor utilized in a power tool may comprise a... | 11/16/2004 |
| 6759773 | Electronically controlled electric motor provided for use in an environment containing solvents An electronically controlled electric motor has, as position sensors (6), coils (5) which are arranged in a stator (2) and opposite permanent magnets (4) of a rotor (3). The coils (5) are produced integrally with connecting ... | 07/06/2004 |
| 6731032 | Electric motor with magnetic sensor wheel A magnetic position sensor wheel for an angular position transducer of an electric motor is provided which includes a hub with a flange, a first ring of magnetic material disposed on one side of the flange between a hub axis and an outer periphery of the flange, and... | 05/04/2004 |
| 6700240 | Stepping motor, stepping motor device and driving method thereof A stepping motor comprises a permanent magnet type rotor with a plurality of poles secured to a rotating shaft and a stator having stator magnetic poles with stator magnetic pole teeth in which excitation windings are wound on a plurality of magnetic pole... | 03/02/2004 |
| 6586857 | Device capable of increasing rotation speed of magneto motor A plurality of magnetic sensors are provided in a magneto motor to sense variations of rotating poles of rotor magnets. One of the magnetic sensors is provided to let the exciting current of stator coils and the rotating poles of the rotor interchange ort... | 07/01/2003 |
| 6133655 | Claw-pole stepping motor with rotor including vibration reducing magnet A claw-pole stepping motor with rotor, including a vibration reducing magnet. Vibration in the axial direction is suppressed by having a correction force, which overcomes a force produced by a vertical motion caused when the rotor is pulse-driven, and kee... | 10/17/2000 |
| 5912521 | Permanent magnet rotor with shorting turns An inductive element in the form of a shorting turn is added to the rotor of a permanent magnet synchronous motor. Changes in inductive coupling between the rotor and a stationary coil as the rotor rotates permits inductive measurements to be used to dedu... | 06/15/1999 |
| 5717268 | Electric motor with tachometer signal generator A permanent magnet electric motor including a rotor having an annular arrangement of field magnets for rotation around an axis relative to a stator. An annular FG magnet arrangement affixed to an end of the rotor cooperates with an adjacent FG coil to pro... | 02/10/1998 |
| 5589722 | Sheet coil motor and method of fabricating the same A sheet coil motor is configured such that a plurality of coil units are attached to a circuit substrate at a predetermined interval, the interval separating the coil units are regular. Each of the plurality of coil units includes a plurality of coils and... | 12/31/1996 |
| 5254895 | Motor for disc drive A disc driving motor for rotating a recording medium in the form of a disc of the type having a disc-shaped rotor yoke around the outer peripheral portion of which is securely joined a driving magnet for generating a rotating force, an auxiliary yoke atta... | 10/19/1993 |
| 5200661 | Slotless, brushless, large air gap electric motor A slotless, brushless, large air gap electric motor comprises a stator having a field winding and field backiron, the field winding being composed of a plurality of successively offset polygonal shaped turns so as to provide a substantially flat winding, ... | 04/06/1993 |
| 5128819 | Disk storage drive with radially extending motor shield A disk storage drive is provided with a brushless drive motor having a stator with a winding. An external rotor coaxially surrounds the stator and is spaced therefrom by a substantially cylindrical air gap. The rotor includes a permanent magnet and a soft... | 07/07/1992 |
| 5101131 | Brushless motor A brushless motor includes a rotor having a multipolar magnet with n-number of magnetic poles and a stator yoke having a plurality of field coils disposed at a position opposing the multipolar magnet. The stator yoke of the brushless motor is provided wit... | 03/31/1992 |
| 5075605 | Inner-rotor commutation device A brushless DC motor includes a rotor having an iron core affixed to a motor shaft. Permanent magnets are affixed to the core and separated by aluminum inserts which are keyed to the core. An annular groove in one end of the rotor core is dimensioned so t... | 12/24/1991 |
| 5028073 | Dynamic vehicle suspension system including electronically commutated motor A suspension system for controlling the relative position of a vehicle and a wheel assembly supporting the vehicle for travel over a surface of terrain. The system includes a member for resiliently connecting the vehicle and the wheel assembly to establis... | 07/02/1991 |
| 4806813 | Motor A motor comprises a rotor made of a permanent magnet and pairs of yokes having pairs of magnetic pole parts arranged round the circumference of the rotor. The rotor is arranged to be pivotally carried by a bearing part disposed at one end of the yoke. A p... | 02/21/1989 |
| 4755699 | Enclosed miniature motor Designed especially for hand-held dictation devices the motor has a three-phase external stator and two-pole permanent-magnet internal rotor, the two enclosed by an external housing from one axial end of which the rotor shaft projects out, its other axial... | 07/05/1988 |
| 4724346 | Permanent magnet-excited external rotor motor A permanent magnet-excited rotor motor is disclosed wherein, a circuit board (6) mounted on a radial motor attachment flange (22) is arranged. The front and rear sides of the circuit board (6) are equipped with conductor strips. On the front side, Hall tr... | 02/09/1988 |
| 4455516 | Brushless motor A brushless D.C. motor which can provide a speed detection signal or position detection signal continuously even when the speed of rotation of the rotor is reduced includes a ring-shaped driving magnet magnetized to develop N and S poles alternatively; a ... | 06/19/1984 |
| 4311933 | Brushless direct current motor A brushless D.C. motor has electrical power switched between the phase windings by means of a circuit which includes a plurality of hall effect switches. The hall effect switches are operated by a plurality of arcuate commutating magnets which are radiall... | 01/19/1982 |
| 4286184 | Electronic motor having a multi-pole external rotor An electronic motor has a multi-pole external rotor and a multi-slot stator which is rotatable inside the external rotor. At least two magnetic field sensing elements are arranged in the vicinity of the external rotor and current supply to the stator wind... | 08/25/1981 |
