Tesla Patents
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405,859 - Method of Electrical Power TransmissionCategory: Power Distribution Country: United States Application Date: March 14th, 1889 Issue Date: June 25th, 1889 
As is well known, certain forms of alternating-current machines have the property, when connected in circuit with an alternating-current generator, of running as a motor in synchronism therewith; but, while the alternating current will run the motor after it has attained a rate of speed synchronous with that of the... more >>
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406,968 - Dynamo-Electric MachineCategory: Motors & Generators Country: United States Application Date: March 23rd, 1889 Issue Date: July 16th, 1889
This invention relates to that class of electrical generators known as "unipolar," in which a disk or cylindrical conductor is mounted between magnetic poles adapted to produce an approximately-uniform field. In the first-named or disk armature machines the currents induced in the rotating conductor flow from the... more >>
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459,772 - Electro-Magnetic MotorCategory: Motors & Generators Country: United States Application Date: April 6th, 1889 Issue Date: September 22nd, 1891
As is well known, certain forms of alternating-current machines have the property, when connected in circuit with an alternating-current generator, of running as a motor in synchronism therewith; but while the alternating current will run the motor after it has attained a rate of speed synchronous with that of the... more >>
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416,191 - Electro-Magnetic MotorCategory: Motors & Generators Country: United States Application Date: May 20th, 1889 Issue Date: December 3rd, 1889
This invention pertains to that class of electro-magnetic motors invented by me in which two or more independent energizing-circuits are employed, and through which alternating currents differing in phase are passed to produce the operation or rotation of the motor. One of the general ways which I have followed in... more >>
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416,192 - Method of Operating Electro-Magnetic MotorsCategory: Motors & Generators Country: United States Application Date: May 20th, 1889 Issue Date: December 3rd, 1889
In a patent granted to me April 16, 1889, No. 401,520, I have shown and described a method of starting and operating synchronizing motors which involved the transformation of the motor from a torque to a synchronizing motor. This I have heretofore done by a change of the circuit-connections, whereby on the start the... more >>
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416,193 - Electro-Magnetic MotorCategory: Motors & Generators Country: United States Application Date: May 20th, 1889 Issue Date: December 3rd, 1889
This invention relates to alternating-current motors of the general description invented by me, and in which two or more energizing-circuits are employed, through which alternating currents differing in phase are passed, with the result of producing a progressive shifting or rotation of the poles or points of maximum... more >>
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416,194 - Electric MotorCategory: Motors & Generators Country: United States Application Date: May 20th, 1889 Issue Date: December 3rd, 1889
This invention relates to the alternating-current electro-magnetic motors invented by me, in which a progressive shifting or rotation of the poles or points of maximum magnetic effect is produced by the action of the alternating currents. These motors I have constructed in a great variety of ways. As instances, I have... more >>
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416,195 - Electro-Magnetic MotorCategory: Motors & Generators Country: United States Application Date: May 20th, 1889 Issue Date: December 3rd, 1889
This invention relates to that form of alternating-current motor invented by me, in which there are two or more energizing-circuits through which alternating currents differing in phase are caused to pass. I have in prior patents and applications shown various forms or types of this motor—first, motors having... more >>
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418,248 - Electro-Magnetic MotorCategory: Motors & Generators Country: United States Application Date: May 20th, 1889 Issue Date: December 31st, 1889
In a patent granted to me April 16, 1889, No. 401,520, I have shown and described a method of operating alternating-current motors by first shifting or rotating their magnetic poles until they had reached or passed a synchronous speed and then alternating the poles, or, in other words, by transforming the motor by a... more >>
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424,036 - Electro-Magnetic MotorCategory: Motors & Generators Country: United States Application Date: May 20th, 1889 Issue Date: March 25th, 1890
I have invented and elsewhere described an electro-magnetic motor operated or adapted to be operated by an alternating electric current, and which is now commonly designated, whether correctly or not, a "magnetic-lag" motor. The main distinguishing features of this motor are the following: An armature is mounted... more >>
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