Tesla Patents
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462,418 - Method of and Apparatus for Electrical Conversion and DistributionCategory: Power Distribution Country: United States Application Date: February 4th, 1891 Issue Date: November 3rd, 1891 
This invention is an improvement in methods of an apparatus for electrical conversion, designed for the better and more economical distribution and application of electrical energy for general useful purposes. My invention is based on certain electrical phenomena which have been observed by eminent scientists and... more >>
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455,068 - Electrical MeterCategory: Meters Country: United States Application Date: March 27th, 1891 Issue Date: June 30th, 1891
My invention pertains to methods of and apparatus for estimating the electrical energy that has been expended in an electrical circuit or any given portion of the same. The principle of the invention is embodied in any form of apparatus in which a conductor immersed in an electrolytic solution is so arranged that... more >>
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454,622 - System of Electric LightingCategory: Lighting Country: United States Application Date: April 25th, 1891 Issue Date: June 23rd, 1891
For a better understanding of the invention it may be stated, first, that heretofore I have produced and employed currents for very high frequency for operating translating devices, such as electric lamps, and, second, that currents of high potential have also been produced and employed for obtaining luminous effects,... more >>
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455,069 - Electric Incandescent LampCategory: Lighting Country: United States Application Date: May 14th, 1891 Issue Date: June 30th, 1891
In order to more distinctly point out those features which distinguish my invention, I would state that heretofore electric lamps have been made, first, by mounting a refractory conductor on metallic supporting-wires leading into a hermetically-sealed receiver from which the air has been exhausted or replaced by an... more >>
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464,666 - Electro-Magnetic MotorCategory: Motors & Generators Country: United States Application Date: July 3rd, 1891 Issue Date: December 8th, 1891
The general object of my present invention is to secure artificially a difference of a quarter of a phase between the currents in the two energizing-circuits of an alternating-current electro-magnetic motor of that general class invented by me, in which the action or operation is dependent upon the inductive influence... more >>
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464,667 - Electrical CondenserCategory: Condensers Country: United States Application Date: August 1st, 1891 Issue Date: December 8th, 1891
The subject of my present application is a new and improved electrical condenser constructed with a view of obviating certain defects which I have observed to exist in the ordinary forms of such apparatus when employed in the system devised by me of producing light and other effects by means of currents of high... more >>
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514,167 - Electrical ConductorCategory: High Frequency Engineering Country: United States Application Date: January 2nd, 1892 Issue Date: February 6th, 1894
In any system of electrical transmission or distribution in which currents of excessively high potential are employed, and more particularly, when the frequency is high, there is a dissipation of energy from the conductor or conductors of the line, due to the electrification of the atmosphere or other surrounding... more >>
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514,170 - Incandescent Electric LightCategory: Lighting Country: United States Application Date: January 2nd, 1892 Issue Date: February 6th, 1894
The invention applies more particularly to that form of lamp in which a small body or button of refractory material is supported by a conductor entering a very highly exhausted globe or receiver, but is also applicable generally to other forms of lamp adapted for use with similar systems in which currents of very high... more >>
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514,972 - Electric Railway SystemCategory: Miscellaneous Country: United States Application Date: January 2nd, 1892 Issue Date: February 20th, 1894
This invention is an improved system or plan of supplying electric current to the motors of street or other cars or vehicles from a central or stationary source of supply, without the use of sliding or rolling contacts between the line conductor and the car motors. I use in my system alternating or pulsating currents... more >>
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512,340 - Coil for Electro-MagnetsCategory: Miscellaneous Country: United States Application Date: July 7th, 1893 Issue Date: January 9th, 1894
In electric apparatus or systems in which alternating currents are employed the self-induction of the coils or conductors may, and, in fact, in many cases does operate disadvantageously by giving rise to false currents which often reduce what is known as the commercial efficiency of the apparatus composing the system... more >>
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