- The world's first radio programme
- 344 patents
- The station at Grimeton, Sweden
- The first television play
- Knight of the Order of the Northern Star
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Ernst F W Alexanderson's patents 1905-1973, according to United
States Patent Office
Alexanderson held totally 344 patents, of which 11 were personal
and 34 together with collegues. Most of them were assignor to
General Electric Company.
1905 Synchronous motor.
Two-speed winding for three-phase motor.
Winding for three-phase motoL
Alternating current generator.
Alternating current generator.
6 Voltage regulator.
1906 Protective means for alternating-current systems.
Ground detector and cut-out.
Means for controlling self-exciting generators.
Voltage regulator.
5 Alternating current generator.
1907 Motor winding.
Alternating current motor.
Dynamo electric machine.
Alternating current motor.
Frequency-changer.
Alternating current motor.
Dynamo-electric machine.
Induction-motor.
9 Alternator-current motor.
1908 Starting motor-converter.
Compensated motor.
Self-exåted alternator.
Induction motor control.
Motor control.
Synchronous motor.
Alternating-current motor
Induction-motor control.
Telephone-relay.
Alternating-current high-frequency generator.
11 Self-exciting generator.
1909 Electric motor.
Single-phase motoL
Induction-generator.
Alternating-current motor.
System of electric distribution.
Electric motoL
Single-phase-motor control.
Alternating-current motor.
Alternating-current motor.
Single-phase-motor control.
Alternating-current motor.
Alternating-current-motor control.
Single-phase motor.
Motor control.
15 Motor control system.
1910 Alternating-current-motor control.
Dynamo-electric machine.
Single-phase motor control.
Electric locomotive.
Commutator-motor.
Single-phase commutator-motor.
Single-phase commutator-motor.
Overload protective device.
Motor control.
Braking alternating-current motors.
Electric braking.
12 Electric braking.
1911 Motor control.
Reinforcer for telephone circuits.
Telephone relay and system.
Manufacturing rotating bodies for high-speed machinery.
5 High-frequency alternator.
1912 Alternating-current motor.
Single-phase motor.
3 Method of and apparatus for relaying high-frequency currents.
1913 Alternating-current motor.
Alternating-current motor.
3 Means for compensating polyphase alternatingcurrent commutator-motors.
1914 Air-inlet valve for carbureters.
Electric braking with alternating-current motors.
Dynamo-electric machine.
Dynamo-electric machine.
Dynamo-electric machine.
Phase-balancer.
Alternating-current-motor control.
Method of and apparatus for indicating the speed of electric motors.
Telephone system.
High-frequency alternator.
High-frequency alternator.
Bearing.
Induction-motor.
14 Neutralizing inductive disturbances.
1915 High-frequency alternator.
2 System of electrical distribution.
1916 Split-phase system.
Selective tuning system.
Boiler and heating system therefor.
Frequency transformation.
Phase-balancer.
Induction-motor.
Alternating-current motor.
Alternating-current-commutator motor.
Controlling altternating currents.
10 High-speed rotating body.
1917 System of ship propulsion.
System of ship propulsion.
Power-transmitting mechanism.
High-frequency alternator.
Automatic control of phase-converters.
Regulator for phase-balancers.
System of electrical distribution.
8 Apparatus for producing an electromotive force of special wave form.
1918 Internal-combustion hydraulic pump.
Rotor for dynamo-electric machines.
Multispeed alternating-current motor.
Electrical system of power transmission.
Automatic control of phase-converters.
Motor-control system.
Motor excitation.
System of electric ship propulsion.
9 Condenser.
1919 Series-multiple control.
System of phase modification.
System of phase modification.
Starting phase-converters.
Speed control of induction-motors.
Electrical system of power transmission.
Electric system of ship-propulsion.
Wireless-telephone system.
Wireless signaling system.
System of frequency transformation.
Bearing.
12 Radiosignaling system.
1920 Means for controlling alternating currents.
Method of and means for controlling high-frequency alternating currents.
Means for controlling alternating currents.
Means for controlling alternating currents.
Regulating system for alternating-current circuits.
Method of and means for controlling electrical energy.
Wireless signaling system.
Radioreceiving system.
Antenna.
Antenna.
11 Radiosignaling system.
1921 Series-multiple control.
High-frequency alternator. (Patent together with S.P. Nixdorff)
High-frequency alternator.
Radio-receiving system.
System of electrical distribution.
Radio-receiving system.
Means for frequency transformations.
Cooling dynamo-electric machines.
Apparatus for producing and distributing electric current waves of radiofrequency.
10 System of radio communications.
1922 Removing sleet from antennae.
Amplifying system.
Rotary transforming apparatus.
High-frequency alternator.
5 Radiosignaling system.
1923 Control system.
Unidirectional radio receiving system.
Wireless signaling system.
Wireless signaling system.
High-frequency signaling system.
6 Radio receiving system.
1924 Electric ship propulsion.
Electric ship propulsion.
System of motor control.
Radio receiving system.
Double squirrel-cage synchronous motor.
High frequency signaling system.
Wireless signaling system.
Wireless signaling system.
Wireless signaling system.
10 Radio transmitting system.
1925 Controlling alternating currents.
Electron-discharge device.
System of distribution.
Radio receiving system.
Signaling system.
Surge preventer.
Operating electric motors.
8 Radio signaling system.
1926 Electric ship propulsion.
Transmitting angular motion.
Alternating-current-motor control.
4 High-frequency signaling system.
1927 System of distribution.
Controlling alternating currents.
High frequency signaling system.
4 Voltage regulator.
1928 Regulating system.
Locomotive control.
Power-factor control system.
Regulating apparatus.
Speed control system.
Electric motor.
System of electric ship populsion.
Antenna.
System of electrical distribution.
System of electrical distribution.
System of distribution.
Electric apparatus.
Electrical transmission of pictures.
Transmission of pictures.
Control of electric power. (Together with A.H. Mittag)
Speed control system. (Together with A.H. Mittag)
Control of electric power. (Together with A.H. Mittag)
Circuit control apparatus. (Together with A.H. Mittag)
19 Control system. (Together with S.P. Nixdorff)
1929 Oscillation generator.
Electric ship propulsion.
Power amplifying means.
Rectifying apparatus.
Control of electric power.
Signaling system.
System of ship propulsion.
Radio receiving system.
Ignition system.
10 Speed control system.
1930 Speed indicating system.
Transmission of pictures.
Radiotelegraphy.
Method of and apparatus for multiplex signaling. (Assignor to RCA)
Stabilisation of tuned radio frequency amplifiers.
Radio signaling system.
Control system.
Electric discharge device.
9 Transmission of pictures.
1931 Radio signaling system.
Transmission of pictures.
Transmission of pictures.
Radio signaling system.
System of distribution.
Radio signaling system.
System of distribution.
8 Method and apparatus for picture transmission by wire or radio. (Together with R.H. Ranger, Brooklyn, N.Y. assignors to RCA)
1932 Signaling. (Assignor to RCA)
Eliminating fading.
Picture transmission.
System for producing high frequency oscillations.
Picture transmission apparatus.
Alternating current commutator machine.
Signaling by phase displacement. (Assignor to RCA)
8 Television receiver.
1933 Radiant energy guiding system for airplanes. (Together with J.H. Hammond jr)
Regenerative electric regulator. (Together with S.P.Nixdorff)
Electrical system.
Indicating system for aircraft.
Indicating altitude from aircraft.
System of electric power transmission.
Electrical transmission system.
Television apparatus.
Electric valve converting system.
Sound-motion picture producer.
Electric valve converting system.
Electric valve converting system.
Amplifying electrical impulses. (Together with R.D. Kell, Scotia, N.Y.)
14 System of electric power transmission. (Together with P.L. Alger och S.P. Nixdorff)
1934 Automatic steering system.
Method and means for determining altitude from air
craft.
Electric translating system.
Radioreceiver. (Assignor to RCA)
Sound reproducing apparatus.
6 Electric valve exåtation circuits. (Together with A.H. Mittag och E.L. Phillipi)
1935 Colored television apparatus.
System of distribution.
3 High frequency transmission system for railways.
1936 1 Torque amplifying system.
1937 Electric valve converting system.
Electric valve translating circuit.
Electric translating circuit.
Electric valve translating circuits.
Airplane landing field using directional radio beams. (Together with J.H. Hammond jr, Gloucester, Mass.)
6 Electric power system. (Together with A.H. Mittag)
1938 Electric valve circuits.
Electric valve converting system.
Discharge lamp system.
4 Cable for transmitting electric power.
1939 1 Course guiding system.
1940 Protective system for electric valve translating apparatus.
Electric valve circuit.
Electric valve converting system.
Electric valve frequency converting system.
Electric valve frequency converting system.
Asynchronous electric power transmission system.
Electric power transmission system.
Electric power transmission system.
Excitation control system for synchronous machines.
Electric valve converting system and control circuit therefor.
Protective system.
12 Electric power converting apparatus.
1941 Electric valve circuit.
Electric motor control system.
Electric power system.
Frequency controlling system.
Electric transforming apparatus.
Navigation and landing of aircraft in fog.
Radio distance meter.
Speed regulating system.
Method of and apparatus for starting and operating of thyratron motors.
Dynamoelectric machine. (Together with M.A. Edwards)
Electric valve circuits. (Together with A.H. Mittag)
12 Radio distance meter. (Together with F.G. Patterson and C.A. Nickle)
1942 1 Electric motor control system.
1943 Electric drive.
Electric drive.
Electric drive.
Electric drive.
Electric drive.
Speed control arrangement for induction dutches.
7 Television system and operation.
1944 Control circuit for electric valve apparatus.
Electric valve translating system.
3 Electric ship propulsion.
1946 Control system.
2 Control system.
1947 Follow-up control system.
Follow-up system.
Electric computer.
Follow-up control system. (Together with M.A. Edwards och K.K. Bowman, Scotia, N.Y.)
5 Electric control arcuits. (Together with A.H. Mittag)
1948 High-frequency wave transmitting apparatus.
Electric frequency transformation system. (Together with A.H. Mittag och M.W. Sims, Fort Wayne, Ind.)
3 Radio landing apparatus. (Together with F.G. Patterson)
1949 Puls echo apparatus for spotting shellfire
Stabilizer for alternating current power transmission systems.
3 Follow-up control system. (Together with M.A. Edwards, Scotia, G.A. Hoyt)
1950 1 Radio detection and ranging system employing multiple scan. (Together with F.G. Patterson och M.W. Sims, Fort Wayne, Ind.)
1951 System for reproducing positions.
Fault-suppressing circuits. (Together with A.H. Mittag och E.L. Phillipi)
3 Locomotive power system. (Together with B.D. Bedford och A.H. Mittag)
1952 Electronic frequency changer and stabilizing control means therefor.
2 Current interrupter. (Together with A.H. Mittag and R.W. Kuenning, Berkeley, Calif.)
1953 Electric motor and stabilizing means therefor. (Together with S.P. Nixdorff)
Stabilizer for alternating current power transmission systems. (Together with R.W. Kuenning, Berkeley, Calif.)
Electronic motor and commutating means therefor. (Together with S.P. Nixdorff)
4 Phase balancing system.
1955 Receiver for Color Television. (Personal patent)
Motor Control System for Vehicle Wind Screen Wipers. (Personal patent)
3 Alternating Current Motor. (Personal patent)
1956 Magnetic amplifier motor control. (Personal patent)
2 System for controlling the flow of molten metal. To Allegheny Ludlum Steel Corp.
1957 Alternating-current motor. (Personal patent)
2 Push-pull magnetic amplifier. (Personal patent)
1958 Magnetic amplifier motor control system. (Personal patent)
2 Methods and systems for motor control. (Personal patent)
1959 1 Motor control system. (Personal patent)
1961 1 Magnetic computer. (Personal patent)
1962 1 Electric motor control apparatus. (Personal patent)
1963 1 Electric motor control apparatus. (Personal patent)
1964 1 Electric motor control system. (Personal patent)
1973 1 Adjustable speed motor control system. (Personal patent)
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