Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 8058760 | Magnetic holding spring for magneto field type motor and manufacturing thereof When the magnet holding spring is in the deployed state of the plate-like shape, the auxiliary pole is beforehand fixed to one of the side-plates, then the magnet holding spring is bent into a “]”-like sectional shape. As a result, the magnet holding spring and ... | 11/15/2011 |
| 7427817 | Small-sized motor having polygonal outer shape A small-sized motor having a polygonal outer shape includes four or more field magnets attached to the inner surface of a motor casing made of metal. A tubular portion of the motor casing is formed into a polygonal tubular shape such that flat side portions equal in... | 09/23/2008 |
| 6982511 | Pole ring A pole ring suitable for d.c. motors is provided. The pole ring includes several retaining projections provided at the outer circumference for the secure retainment in a motor housing. The retaining projections have retaining surfaces pointing oppositely to the moun... | 01/03/2006 |
| 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 |
| 6864609 | Low noise motor with one-piece frame and torsion flux ring An electric motor has a unitary frame. The frame includes locating structure extending from an end portion thereof. The motor includes a shaft and an armature disposed within at least a portion of the frame and constructed and arranged to rotate the shaft. A commula... | 03/08/2005 |
| 6794782 | Shackle spring A fastening spring for fastening at least one component accommodated in a housing of an electric motor, in the prior art, has a bending zone which is exposed to strong mechanical stresses. A fastening spring (1, 1′) of the invention has at least a se... | 09/21/2004 |
| 6737780 | Electric motor magnetic flux path structure An electric motor 10 has an armature 12 including windings 14. The armature is constructed and arranged to rotate a shaft 16. The motor includes a commutator 18 and a brush card assembly 20 having brushes to engage the commu... | 05/18/2004 |
| 6091220 | Device for detecting rotor speed or position in a continuously excited electric motor In an electric motor, a Hall sensor (3) is arranged in the vicinity of the outer circumference of the rotor (2) and of at least one of the permanent magnets (4-7) provided for operationally exciting the electric motor. At least one of the permanent magnet... | 07/18/2000 |
| 5763974 | Permanent magnet electric motors, in particular for ventilation of motor vehicles A permanent magnet electric motor comprises a body shell with a cylindrical inner face, permanent magnets lying against the inner face of the body shell, and connecting pieces, each of which has a body portion disposed between two adjacent permanent magne... | 06/09/1998 |
| 5276375 | Apparatus for fixation of magnetic shells in a motor housing Fixation of magnetic shells may be implemented in a motor housing in a simple manner in terms of design and assembly technology while guaranteeing great heat resistance. S-shaped sheet metal stirrups include at least a first stirrup portion bent radially ... | 01/04/1994 |
| 5264749 | Electric motor with adhesively mounted magnet yoke An electric motor having a cylindrical frame with a thickness less than that of conventional electric motors. A tubular inner yoke is inserted in the cylindrical frame and in combination therewith serves as a magnetic path. The total thickness of the cyli... | 11/23/1993 |
| 5216306 | Casing structure for motor A casing of a motor is rendered light and also capable of forming a magnetic circuit in cooperation with a permanent magnet. The casing consists of an outer cylinder and an end bracket each being made of aluminum. An inner cylinder, made of iron and carry... | 06/01/1993 |
| 5201111 | Method of manufacturing an electric motor A method of manufacturing an electric motor for a windshield wiper of motor vehicles is described, in which magnets are held on the housing case by way of an adhesive connection. Thereby the magnet, together with the adhesive, is inserted into the housing... | 04/13/1993 |
| 5200658 | Electric motor with through-bolt guides for mounting An electric motor has guides (8,9,10,11) inside its yoke (1) for guiding the insertion of a through-bolt (7) for mounting the electric motor on a fixed surface, thereby preventing the through-bolt (7) from being attracted by permanent magnets (2) which ar... | 04/06/1993 |
| 4881002 | Miniature motor A miniature motor comprising a stator having permanent magnets constituting a two-pole field, and a rotor having rotor windings wound on a rotor core of a three-pole construction, in which the rotor core is formed in such a manner that the cross-sectional... | 11/14/1989 |
| 4748358 | Electric starter motor with holder for permanent magnets An electric machine, particularly for starting devices, is suggested. Permanent magnets (4 to 9) with assigned flux conducting pieces (10 to 15) are arranged in the housing (1) of the electric machine. The permanent magnets (4 to 9), together with the flu... | 05/31/1988 |
| 4745319 | Magneto D.C. motor having elastic magnet mounting retainers A plurality of permanent magnets (4) are disposed with gaps between adjacent magnets along the inner peripheral surface of a yoke (2) of a stator for a magneto D.C. motor. In gaps between magnets, there are provided retainers (3), ech of which is made of ... | 05/17/1988 |
| 4587449 | Permanent magnet rotary dynamo electric machine A permanent magnet rotary dynamo electric machine wherein each permanent magnet pole is equipped with a flux shunt which provides a direct flux path between the airgap at the strong tip region of the pole and the iron circuit upon which the pole is suppor... | 05/06/1986 |
| 4580072 | Stator for magnet-type rotating machines A stator for magnet-type rotating machines comprises projections formed in the inner circumferential surface of a fixed frame in the circumferential direction at a predetermined distance. Position determining pieces, each having elasticity and engaging pa... | 04/01/1986 |
| 4412145 | Stator for an electric machine excited by permanent magnets Arcuate permanent magnets are inserted into the bore hole of a stator intended for use in an electric machine which is excited by permanent magnets. Spring elements, inserted into recesses in the wall of the bore between the magnets, have spring arms whic... | 10/25/1983 |
| 4335323 | Stamped sheet metal frame for dynamoelectric machine A dynamoelectric machine is provided with a frame structure consisting of at least two fabricated sheet metal pieces of identical shape and size. The sheet metal members are formed to provide cavities to accommodate an armature structure and bearings, and... | 06/15/1982 |
| 3988623 | Case for a small-sized electric motor In a case for a small-sized motor, there are provided projections and convex portions in the cylindrical portion of the case for holding permanent magnets in the case without using any binding agent, springs or screws.... | 10/26/1976 |
