Nikola Tesla's patents
U.S. Patent 334,823 - Commutator for Dynamo Electric Machines - 1886 January 26 - Elements to prevent sparking on dynamo-electric machines; Drum-style with brushes.
U.S. Patent 335,786 - Electric Arc lamp - 1886 February 9 - Arc lamp with carbon electrodes controlled by electromagnets or solenoids and a clutch mechanism; Corrects earlier design flaws common to the industry.
U.S. Patent 335,787 - Electric arc lamp - 1886 February 9 - Arc lamp's automatic fail switch when arc possesses abnormal behavior; Automatic reactivation.
U.S. Patent 336,961 - Regulator for dynamo electric machines - 1886 March 2 - Two main brushes connected to helices coil ends; Intermediate point branch shunt connection for third brush.
U.S. Patent 336,962 - Regulator for Dynamo Electric Machines - 1886 March 2 - Auxiliary brush[es] shunting a portion or whole of the field helices coil; Regulates energy flow; Adjustable level of current.
U.S. Patent 350,954 - Regulator for Dynamo Electric Machines - 1886 October 19 - Automatic regulation of energy levels; Mechanical device to shift brushes.
U.S. Patent 359,748 - Dynamo electric machine - 1887 March 22 - Improve construction; Facilitate easier construction; Reduce the cost; Magnetic frame; Armature; Alternating current synchronous motor.
U.S. Patent 381,968 - Electro magnetic motor - 1888 May 1 - Mode and plan of operating electric motors by progressive shifting; Field Magnet; Armature; Electrical conversion; Economical; Transmission of energy; Simple construction; Easier construction; Rotating magnetic field principles.
U.S. Patent 381,969 - Electro Magnetic Motor - 1888 May 1 - Novel form and operating mode; Coils forming independent energizing circuits; Connected to an alternating current generator; Synchronous motor.
U.S. Patent 381,970 - System of Electrical Distribution - 1888 May 1 - Current from a single source of supply in the main or transmitting circuit induce by induction apparatus; Independent circuit(s); Electric distributor.
U.S. Patent 382,279 - Electro Magnetic Motor - 1888 May 1 - Rotation is produced and maintained by direct attraction; Utilizes shifting poles; Induction magnetic motor.
U.S. Patent 382,280 - Electrical Transmission of Power - 1888 May 1 - New method or mode of transmission; Dynamo motor conversion with two independent circuits for long distance transmission; Alternating current transmission; Includes a disclaimer; Economic; Efficient.
U.S. Patent 382,281 - Electrical Transmission of Power - 1888 May 1 - Improvements in electromagnetic motors and their mode or methods of their operations; Motor is wound with coils forming independent circuits on the armature; Armature is mounted to rotate between two different poles; Armature will eventually synchronize with that of the generator; Windcoils or coils on the field magnets; Expose to continuous current to maintain a permanent field.
U.S. Patent 382,282 - Method of Converting and Distributing Electric Currents - 1888 May 1 - Related to electric distribution systems; Current is from a single main source or suitable transmitting circuit; Induction into an independent circuit; Divide the current from a single source; Transformations; Discovery of method to avoid prior liable and dangerous methods; True Dynamic induction.
U.S. Patent 382,845 - Commutator for dynamo electric machines - 1888 May 15 - Relates to dynamo-electric machines or motors; Improvements on devices to collect or communicate currents; Avoids destruction and wear of machine; Avoid adjustments due to destruction and wear; Enable practical construction of very large dynamo electric machines or motors with the minimum number of communicator segments; Increases safety and efficiency.
U.S. Patent 390,413 - System of electrical distribution - 1888 October 2 - Related to previous electric distribution systems developed by Tesla; Examples of systems in operation with motors or converters, or both, in parallel; Examples of systems in parallel; Examples of systems in series.
U.S. Patent 390,414 - Dynamo Electric Machine - 1888 October 2 - Related to the patents of Tesla and Charles F. Peck, numbers: US381968 and US382280; Ordinary forms of continuous and alternate current systems may be adapted to Tesla's system, with slight changes to the systems; Effects their forms; Only the best and most practical solutions are presented to the three most common forms of the devices applicable; Illustrated are the continuous (or closed) circuit machines, machines possessing armatures with coils connected diametrically (known as "open-circuits"), and machines with armature-coils of which have a common joint.
U.S. Patent 390,415 - Dynamo Electric Machine or Motor - 1888 October 2 - Improvement in the construction of dynamo or magneto electric machines; Novel form of frame and field magnets that renders the machine more sturdy and compact as a structure; Requires fewer parts; Less difficulty in construction; Lower expense; Useful to alternating and continuous current machines.
U.S. Patent 390,721 - Dynamo Electric Machine - 1888 October 9 - Relates chiefly to the alternate current machine invented by Mr. Tesla; Related to patents numbered US381968 and US382280; Seeks to avoid mechanical drawback of running high frequency machines; Efficient at low speeds; Producing rotating magnetic poles in one element of the machine and drive the other at a different speed.
U.S. Patent 390,820 - Regulator for Alternate Current Motors - 1888 October 9 - Improvement in the electrical transmission systems; Means of regulating and power of the motor or motors; Used with system of multiple motors primarily (or systems with motors and transformers) that have independent energizing circuits which act to set up progressive or shifting magnetic poles (i.e. the rotating magnetic field); Controls the speed of the motor.
U.S. Patent 396,121 - Thermo Magnetic Motor - 1888 January 15 - Widely known that heat applied to a magnetic body will lessen its magnetizing ability; High enough temperatures will destroy the magnetic field; Mechanical power by a reciprocating action obtained from the joint action of heat, magnetism, and a spring or weight (or other force); In this patent, the application of heat to a body that is magnetized by induction or otherwise to the action of heat until the magnetism is neutralized to allow a weight or a spring to give action and lessen the action of the heat to restore the magnetic effect to move the body in the opposite direction.
U.S. Patent 401,520 - Method of Operating Electro Magnetic Motors - 1889 April 16 - Improvements to previous instances of synchronous motors; Previous instances of synchronous motors have not been started by the alternating current generators; New discovery of simple method or plan of operating such motors; Requires no other device other than the motor itself; Conversion from a double circuit motor and which will start under the actions of an alternate current into a synchronizing-motor; synchronous motor definition.
U.S. Patent 405,858 - Electro Magnetic Motor - 1889 June 25 - Torque, instead of being the result in the difference in the magnetic periods or phases of the poles or to the attractive parts to whatever due, is produce to the angular displacement of the parts which, though movable with the respect to one another, are magnetized simultaneously, or approximately so, by the same currents; Concerns the armature and the field laminations of the magnetic core for the greatest magnetic attractions; Best means to achieve these results.
U.S. Patent 405,859 - Method of Electrical Power Transmission - 1889 June 25 - New and useful method of bringing up the motor to a desirable speed; Forms of alternating current machines, connected to alternating current generators, can be run as synchronous motor; Prior, alternating current will not start it; Construct a generator with two coils or sets of coils and connect them with a motor of corresponding coils or sets of coils; By means of two line wires, the motor and generator in like fashion; Related to US 390413 (for means of starting); Will operate as a single-circuit synchronizing system.
U.S. Patent 406,968 - Dynamo Electric Machine - 1889 July 16 - Relates to class of machines referred to as "Unipolar" machine (i.e., a disk or cylindrical conductor is mounted in between magnetic poles adapted to produce a uniform magnetic field); Construction of a machine with two fields, each having a rotary conductor mounted between its poles; Discussed the disk form primarily; The direction of the magnetism or order of the poles in one field of force is opposite to that of the other, so the rotation of the disk in the same direction forms a field from the center to the circumference and another from the circumference to the center; Contacts applied to the shafts form terminals of a circuit to produce a sum of electromotive forces of the two disks; If direction of the fields are the same, driving the disks in the opposite direction will obtain the same results.
U.S. Patent 413,353 - Method of Obtaining Direct current from Alternating Currents - 1889 October 22 - Superiority of alternating currents discussed; Delineates machines to convert alternating currents to direct (or continuous) currents at will at one or more points; Obtain direct currents from alternating currents; Active resistances to opposite electrical character, whereby the currents or current-waves of opposite character will be diverted through different circuits.
U.S. Patent 416,191 - Electro-Magnetic Motor - 1889 December 3 - Induction motor with two or more energizing circuits; alternating currents of differing phases are passed to produce rotation or operation of the motor; simple way consists of two circuits; alternate way consists of one line that divides the alternating current in the motor circuit and effects an artificial lag in one of the circuit of branches (such as by a different induction capacity).
U.S. Patent 416,192 - Method of Operating Electro-Magnetic Motors - 1889 December 3 - Related to US401520; Alternative improvements to synchronous motors; Torque and synchronous actions in motors; different field circuit of differing induction; Windings and shunts; Increases tendency to synchronize.
U.S. Patent 416,193 - Electro-Magnetic Motor - 1889 December 3 - Induction motor operation with two or more windings; securing differing phase differences; Phase proportional to the induction and inverse to the resistance encountered by the current; one circuit (the energizing circuit) should have high induction and low resistance (along with possessing the greater length or number of turns) and the converse in the other (which has few turns of finer wire or wire that has higher resistance); magnetic quantities of the poles should be approximately equal; Self-induction cores are much longer.
U.S. Patent 416,194 - Electric Motor - 1889 December 3 - Drawings include the motor seen in many of Tesla's photos; Classic alternating current electro-magnetic motor; Induction motor operation; Field and armature of equal strengths or magnetic quality; field and armature cores of equal amounts; Coils containing equal amount of copper.
U.S. Patent 416,195 - Electro-Magnetic Motor - 1889 December 3 - Induction motor operation with two or more windings; Differing phases; Structural and operational conditions; Armature operation conditions and the obedience to the energizing circuit and stator; Construction and organization principles.
U.S. Patent 417,794 - Armature for Electric Machines - 1889 December 24 - Construction principles of the armature for electrical generators and motors; Simple and economical; Coils of insulated conducting wire (or ribbon) may be wound or formed into bobbins; Position of the bobbins dictate the windings; Armature has polar projections and maximum core-surface exposure to the field magnetic poles; Related to other applicant patents, numbers US327797, US292077, GB9013.
U.S. Patent 418,248 - Electro-Magnetic Motor - 1889 December 31 - Electric generator; Employment of an artificial cooling device; Enclosing the source of heat and that portion of the magnetic circuit exposed to the heat and artificially cooling the said heated part; Combination of an enclosed source of heat applied to a portion of said core; Magnetized core or body and a conductor within the field of force; Artificial cooling device for reducing the temperature of the heated portion thereof; Means for bringing a cooling gas or fluid in contact with the heated portion of the core, and means for controlling the admission of the same; The combination and coils wound thereon and a connection with a boiler for admitting steam into the channels, as set forth; Magnetized core containing passages or channels; Means for applying heat to a portion of the core.
U.S. Patent 424,036 - Electro-Magnetic Motor - 1890 March 25 - Cites then common language of his motors referred to as the "magnetic lag" motors; Another form of the induction motor with two or more energizing circuits with differing phase differences are passed to produce rotation or operation of the motor; Magnetism lags electrical parts of energizing effects; Manifests these effect simultaneously and not successively; Related to US405858; Torque is produced to the angular displacement of parts; Best means to achieve these results; prefer the use of alternating currents.
U.S. Patent 428,057 - Pyromagneto Electric Generator - 1890 May 13 - Electric generator; Employment of an artificial cooling device; Enclosing the source of heat and that portion of the magnetic circuit exposed to the heat and artificially cooling the said heated part; Combination of an enclosed source of heat applied to a portion of said core; Magnetized core or body and a conductor within the field of force; Artificial cooling device for reducing the temperature of the heated portion thereof; Means for bringing a cooling gas or fluid in contact with the heated portion of the core, and means for controlling the admission of the same; The combination and coils wound thereon and a connection with a boiler for admitting steam into the channels, as set forth; Magnetized core containing passages or channels; Means for applying heat to a portion of the core.
U.S. Patent 433,700 - Alternating-Current Electro-Magnetic Motor - 1890 August 5 - Rotation of an electromagnetic motor is produced by the magnetic movements or the maximum of the pole's (or point's) magnetic effects from the conjoined actions (or the two energizing circuits) through which alternating currents (or similar rapidly-varying currents) are passed through; Multiple magnets are powered by artificial currents; Inverse strength of magnetism on stator for best rotation; Creates multiple phases through one circuit from one power source.
U.S. Patent 433,701 - Alternating-Current Motor - 1890 August 5 - Two sets of field-pole pieces of energized independently by the same source; Closed magnetic iron shunts or bridges in sets or series.
U.S. Patent 433,702 - Electrical Transformer Or Induction Device - 1890 August 5 - Main magnetic core and the primary and secondary coils interposed by a magnetic shield or screen between the coils or around one of the coils; Coils can be wound upon or built up around the magnetic shield; Adapted to or capable of being magnetically saturated by a predetermined current strength below the maximum in the primary.
U.S. Patent 433,703 - Electro-Magnetic Motor - 1890 August 5 - Describes the combination, in an alternating current motor, of an energizing coil and a core composed of two parts (one being protected from magnetization from the other one interposed between it and the coil); A rotating armature is motivated by the induced fields; Alternatively, a field magnet composed of a coil and core (with two sections in proximity of the coil and an inner section between the same); Also, a field magnet each composed of a coil and core (with two sections in proximity of the coil and an inner section between the same).
U.S. Patent 445,207 - Electro-Magnetic Motor - 1891 January 27 - Describes the combination, in a motor, of a primary energizing circuit (connected to a generator) and a secondary circuit in inductive relation to the primary; Each circuit has a different electrical character, resistance, induction capability, or number and type of windings.
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U.S. Patent 1,274,816 - Speed Indicator - 1918 August 6 - Speedometer that possesses the feature of: Linearly proportional torque readings; Strong low speed torsional effects; not affected by atmospheric density, temperature, nor magnetic influences; Rugged; Simple; Economical.
U.S. Patent 1,314,718 - Ship's Log - 1919 September 2 - Novel and advantageous construction of a ship's log; Instantaneous reading of knots or miles-per-hour.
U.S. Patent 1,329,559 - Valvular Conduit - 1920 February 3 - Improvement by means of a conduit or channel characterized by valvular action; Conduit has baffles, recesses, projections, enlargements, or buckets that channels the flow's movement one way more efficiently; Mechanical diode; One-way valve with no moving parts.
U.S. Patent 1,365,547 - Flow-Meter - 1921 January 11 - Related to the meter of measurement for velocity and quantity of fluid flow.
U.S. Patent 1,402,025 - Frequency-Meter - 1922 January 3 - Ascertain the periodic electric frequency and electric oscillation by the rotation or reciprocation of an electromechanical device.
U.S. Patent 1,655,113 - Method of Aerial Transportation - 1928 January 3 - VTOL aeroplane; Describes a method of achieved vertical take-off, transition to and from horizontal flight, and vertical landing, with a tilting rotor. Including transportation which consists in developing by the propelling device a vertical thrust in excess of the normal, causing thereby the machine to rise in an approximately vertical direction, tilting it and simultaneously increasing the power of the motor and thereby the propeller thrust, then gradually reducing the propeller thrust as forward speed is gained and the plane takes up the load, thus maintaining the lifting force sensibly constant during flight, tilting the machine back to its original position and at the same time increasing the power if the motor and thrust of the propeller and effecting a landing under the restraining action of the same.
U.S. Patent 1,655,114 - Apparatus for Aerial Transportation - 1928 January 3 - VTOL aircraft; Includes a correction.
U.S. Patent RE11,865 - Method of Insulating Electric Conductors - 1900 October 23 - Expounding on Faraday's hypothesis of freezing substances make them possess a higher dielectric level to insulate transmission conductors; Improvements in the method set out by Faraday; Method of insulating electrical conductors which consist in surrounding or supporting said conductors by a material which acquires insulating properties when frozen or solidified; Method of maintaining a conductor within gaseous cooling agent by the continuous application of said agent; Trough or conduit with circulating cooling agents.
GB1877 - Improvements in Electric Lamps - 1886 February 9
GB2801 - Improvements in Reciprocating Engines and Means for Regulating the Period of the same - 1894 February 8
GB2812 - Improvements in Methods of and Apparatus for the Generation of Electric Currents of Defined Period - 1894 February 8
GB2975 - Improvements in Dynamo Electric Machines - 1886 March 2
GB6481 - Improvements relating to the Electrical Transmission of Power and to Apparatus therefor - 1888 May 1
GB6502 - Improvements relating to the Generation and Distribution of Electric Currents and to Apparatus therefor - 1888 May 1
GB6527 - Improvements relating to Electro-motors - 1889 April 16
GB8200 - Improvements relating to the Transmission of Electrical Energy - 1905 April 17
GB8575 - Improved Methods of and Apparatus for Generating and Utilizing Electric Energy for Lighting Purposes - 1891 May 19
GB11293 - Improvements relating to the Utilization of Electromagnetic, Light, or other like Radiations Effects or Disturbances transmitted through the Natural Media and to Apparatus therefor - 1901 June 1
GB11473 - Improvements in Alternating Current Electro-magnetic Motors - 1891 July 6
GB12866 - Improvements in Electrical Circuit Controllers - 1898 June 8
GB13563 - Improvements in, and relating to, the Transmission of Electrical Energy - 1901 July 3
GB14550 - Improvements relating to the Insulation of Electric Conductors - 1900 August 14
GB14579 - Improvements in and relating to the Transmission of Electrical Energy - 1901 July 17
GB16709 - Improvements relating to the Conversion of Alternating into Direct Electric Currents - 1889 October 22
GB19420 - Improvements in Alternating Current Electro-magnetic Motors - 1889 December 3
GB19426 - Improvements in the Construction and Mode of Operating Alternating Current Motors - 1889 December 3
GB20981 - Improvements relating to the Production, Regulation, and Utilization of Electric Currents of High Frequency, and to Apparatus therefor - 1896 September 22
GB24001 - Improved Method of Imparting Energy to or Deriving Energy from a Fluid and Apparatus for use therein - 1910 October 17 - Bladeless turbine having disc rotors; Openings in the central portions and separating star-washers; Riveted into single, solid structure; Keyed to the shaft; Turbine or rotary engine.
GB24421 - Improvements in Systems for the Transmission of Electrical Energy and Apparatus for use therein - 1897 October 21
GB26371 - Improvements in the Method of and Apparatus for Controlling the Mechanism of Floating Vessels or Moving Vehicles - 1898 December 13
GB174544 - Improvements in Methods of and Apparatus for the Generation of Power by Elastic Fluid Turbines - 1921 April 1
GB179043 - Improved Process of and Apparatus for Production of High Vacua - 1921 March 24
GB185446 - Method of and Apparatus for Aerial Transportation - 1921 April 4
GB186082 - Improvements in the Construction of Steam and Gas Turbines - 1921 March 24 - Two heavier end-plate; Tapered toward the periphery; Reduces maximum centrifugal stress; Turbine.
GB186083 - Improved Method of and Apparatus for the Economic Transformation of the Energy of Steam by Turbines - 1921 March 24 - Improvements to increase efficiency of steam power plants and thermo-dynamic transformers; Producing motive power; Economical; Operable at very high temperature; Operable with cheap fuel; Avoids deteriorating actions previously common; System is related to the Tesla turbine.
GB186084 - Improved Process of and Apparatus for Deriving Motive Power from Steam - 1921 March 24
GB186799 - Process of and Apparatus for Balancing Rotating Machine Parts - 1921 September 2
CA24033 - Improvements in Dynamo Electric Machines - 1886 April 24
CA24338 - Electric Arc Lamp - 1886 June 18
CA29537 - Improvements in Methods of and Apparatus for the Electrical Transmission of Power - 1888 May 1
CA30172 - Improvements in Methods of and Apparatus for Converting and Distributing Electric Currents - 1888 May 1
CA33317 - Improvements in Methods and Apparatus for Converting Alternating into Direct Currents - 1889 December 19
CA135174 - Improvements in Fluid Propulsion - 1910 November 24 - Tesla Pump
CA142352 - Improvement in the Art of Transmitting Electrical Energy Through the Natural Media - 1906 April 17
http://en.wikipedia.org/wiki/Nikola_Tesla
