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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 |
| 7239109 | Single-phase induction motor A single-phase induction motor includes a main winding, an auxiliary winding, a run capacitor, and a subsidiary start device. The auxiliary winding is configured such that the number of turns of the auxiliary winding, through which a current flows, varies according ... | 07/03/2007 |
| 7071650 | Synchronous induction motor and electric hermetic compressor using the same A synchronous induction motor has a stator having a main winding and an auxiliary winding; a rotor having a yoke, a permanent magnet embedded in the yoke and a secondary conductor provided in the vicinity of periphery of the yoke; and a starter. The starter has a st... | 07/04/2006 |
| 6909263 | Gas turbine engine starter-generator exciter starting system and method including a capacitance circuit element A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the p... | 06/21/2005 |
| 6873131 | Dual voltage electric motors An electric motor selectively connectable to receive one of a plurality of supply voltages, the plurality of supply voltages comprising a low supply voltage and a high supply voltage. The motor can comprise a stator having a first winding and a second winding, a sha... | 03/29/2005 |
| 6489742 | Efficiency maximizing motor controller and method An efficiency-maximization motor controller that includes a use method has power conveyance to an induction motor (1) with a digital signal processor (DSP) (8) that calculates and optimizes supply of current for existent motor loading from a power supply ... | 12/03/2002 |
| 6486625 | Device for controlling a starter for a motor vehicle A device for controlling the power supply to the electric motor of a starter for a vehicle having a power switch connected in series with the electric motor, units for controlling the power switch, and an auxiliary switch which shorts the electric motor w... | 11/26/2002 |
| 5621295 | Device for driving using an electric motor comprising means for measuring the displacement of the driven body Device for driving a body by means of an electric motor, comprising mechanical means for measuring the displacement of said body which are kinematically linked to the body and are equipped with switches (ID, IM) actuated by the mechanical measurement mean... | 04/15/1997 |
| 5561357 | Starting device and circuit for starting single phase motors An auxiliary capacitance starting device is connected by only two wires to a capacitor start-induction run (CSIR) or permanent split capacitor (PSC) motor. The device includes an auxiliary start capacitor and an electro-mechanical switching relay that has... | 10/01/1996 |
| 5512809 | Apparatus and method for starting and controlling a motor An apparatus and method for starting and controlling a motor comprises a timing circuit and a main control circuit. The timing circuit initiates a start-up period upon detecting power and provides an indication of the start-up period. The main control cir... | 04/30/1996 |
| 4991050 | Method and device for protecting starters from fault currents An apparatus for protecting the fault current intolerant elements of a motor starter circuit or the like is comprised of a protective shunt which bypasses the fault current intolerant elements in response to the detection of high fault currents. The prote... | 02/05/1991 |
| 4967131 | Electronic motor starter An electronic motor starter for use with a single-phase induction motor in which the hysterisis width can be adjusted in the range of 75 volts by providing for the control of a positive feedback characteristic of NAND gates and a strength of input signal.... | 10/30/1990 |
| 4885655 | Water pump protector unit A water pump protector unit which includes electrical circuitry through which an electric motor is energized. The pump protector unit is primarily adapted for operation of a capacitor-start induction-run electric motor which operates a water pump. The ele... | 12/05/1989 |
| 4445079 | Electromagnetic relays An improved electromagnetic relay having a wafer of material with positive temperature coefficient of resistivity (PTC) mounted inside the relay combines a sturdy construction with low manufacturing costs adapting the relay for use as a starting relay for... | 04/24/1984 |
| 4388581 | Dynamoelectric machine A dynamoelectric machine has only a pair of line terminals adapted for selective connection across a single phase power source and is operable to be started in a split-phase mode, to run at a predetermined low speed in a single phase mode, and to run at a... | 06/14/1983 |
| 4378520 | D-C Relay relief control for A-C electric motor A D-C relay control is employed for a single phase induction motor for disconnecting the starting capacitors and/or starting windings from the main windings as the motor speed increases upon start up. D-C for the relay control is obtained from a rectifier... | 03/29/1983 |
| 4066937 | Control circuit for a two speed single phase motor A control circuit for a two-speed single-phase motor as used in a hermetic refrigerant compressor which includes means for preventing welding of the start relay contacts of the start relay means by electrical discharge from the run capacitor. In one aspec... | 01/03/1978 |
