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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 6971152 | Method of expanding types of synchronous motors and synchronous motors produced by the method A method of expanding types of synchronous motors capable of reducing the number of required stator types to use stators in common, and a synchronous motor produced by the method. A group of stators are prepared by stacking stator cores of identical shape so that he... | 12/06/2005 |
| 6960847 | Electromagnetic actuator and composite electromagnetic actuator apparatus An electromagnetic actuator with high performance such as high speed and high resolution is inexpensively provided with solutions to problems associated with power supply and leakage flux, which have been involved in the structure of a moving coil type and have been... | 11/01/2005 |
| 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 |
| 6384504 | Electric machine with a rotor constructed of permanent magnets and magnetic flux guides An electric machine comprising a stator and a rotor (2) separated by an air gap (12), (a) the rotor (2) being composed with permanent magnets (8) magnetized substantially in circumferential direction, and with one magnetic flux conducting piece assembly (... | 05/07/2002 |
| 6160330 | Three-phase stepping motor and driving method therefor A three-phase stepping motor comprising: a rotation shaft rotatably supported by a pair of bearings provided in predetermined places of a housing so as to be in opposition to each other; a permanent-magnet rotor formed in a cylindrical shape so as to have... | 12/12/2000 |
| 5917261 | Motive power generating apparatus utilizing energy of permanent magnet A motive power generating apparatus utilizing magnetic flux from permanent magnets providing higher efficiency and torque is disclosed. An apparatus according to one embodiment of the present invention comprises a pair of disc-shaped rotors 10 and 20, a p... | 06/29/1999 |
| 5552653 | Electric motor with increased T/N characteristic value In an electric motor, in order to simplify the structure and to remarkably improve the T/N characteristic value, yoke plates mounted on a field magnet are so shaped that the total magnetic flux of the field magnet is collectively extended to the iron core... | 09/03/1996 |
| 5289064 | Three-phase permanent magnet stepping motor An inner- or outer-rotor type three-phase permanent magnet stepping motor constituted by a stator having circumferentially equidistantly arranged three magnetic poles each having small teeth equal in number and in pitch, and a rotor rotatably arranged alo... | 02/22/1994 |
| 4339679 | Low-inertia high-torque synchronous induction motor A low inertia synchronous induction motor for driving a daisy wheel printing element comprising a rotor assembly including an elongated motor shaft, a first laminated drum-shaped pole piece mounted concentrically on the shaft, second and third laminated c... | 07/13/1982 |
| 3956650 | Laminar-rotor synchronous inductor motor The rotor structure of a synchronous inductor motor, such as a stepping motor, is of a compact, simplified and high-efficiency construction consisting essentially of wholly planar annular laminations which include stacks of thin externally-toothed element... | 05/11/1976 |
