invented an electric clock, developed a telegraph device
founder of the electrochemical theory of batteries, explained the rotatory movements observed at the time of the aurorae boreales by the influence of the terrestrial magnetism
worked on galvanoplastics, electric motors, and wire telegraphy
developed the first practically used telegraph system, measured the speed of electricity, invented rheostat and Wheatstone bridge
German mechanic who invented the Ruhmkorff's coil, a type of induction coil that could produce very large electrical sparks
studied magnetism and electricity, made sensitive magnetometers and electrodynamometer, developed of a system of units that expressed electrical concepts in terms of mass, length, and time
a French watchmaker and physicist who invented some electrical instruments, e.g. first induction coils (before Ruhmkorff), and particularly contributed to the development of electrical telegraphy
formulated Lenz's law, a fundamental law of electromagnetism
English inventor who worked with Charles Wheatstone in developing electric telegraphy
created electrodiagnosis and electrotherapy, applied electrodes to study electrically induced movements of muscles
developed early electrical instruments and studied electrical discharges through rarefied gases
a French instrument maker, constructed the first direct current dynamo in 1832
discovered the principle of the telephone in 1849 and developed a working model by 1859, many years before Alexander Graham Bell's patent
invented the first electrical clock, patented the basics of facsimile, developed chemical telegraph receivers and punch-tapes for telegraph transmission
developed in 1847 a facsimile system with tin-foil covered revolving drums for transmitting and receiving recorded pictures
known as “Father of the Fuel Cell”
invented the electrochemical battery (Bunsen battery), the spectroscope, the gas burner, and the photometer; one of the founders of spectroscopy; discovered the elements cesium and rubidium
repeated and improved Galvani's experiments on bioelectricity, his experiments had stimulated further study of Du Bois-Reymond and were at the very beginning of bioelectrochemistry
an early developer of electromagnetic machinery: he developed a self-acting circuit breaker and a primitive electric locomotive, which had a trial run in 1850; one of the earliest electric motors was invented by him in 1838
the first American professional maker of electrical machines, also wrote several important books on electrical machines and instruments, including the first catalog of commercially available electrical machines made in his workshop
invented a mercury vacuum pump and the Geissler's tube in which gas at low pressure glowed when subjected to an electrical voltage, demonstrating the principle of the electric discharge lamp
promoted electrotherapy, established the first electrical therapy department in England in 1840
developed the first prototype of fax sending images by telegraph means
an extraordinary inventor, engineer and entrepreneur, founder of electrical engineering, who played an important role in the development of the telegraph industry and founded Siemens Company in Berlin in 1847
studied electrical phenomena in nerve, his work was in the beginning of bioelectrochemistry and electrophysiology
established that the various forms of energy: mechanical, electrical, and heat - are basically the same and can be changed, one into another; also contributed electrochemistry developing electrowinning of precious metals
founder of modern organic chemistry, first applied electrolysis to organic synthesis
(1821-1894)
known to electrochemists for the formulation of the double charged layer at an electrode/electrolyte interface, also greatly contributed to physiology, optics, electrodynamics, mathematics, and meteorology
participated in the development of wireless telegraphy, particularly, Anglo-American trans-Atlantic cable, developed famous "Clark cell" - a stadard electrochemical cell
formulated Kirchhoff's laws that allow calculation of currents and electromotive forces in multi-loop electrical circuits
made valuable investigations concerning electric phenomena in vacuum tubes and contributions to the theory of ions, formulated ion transport numbers and the first method for their measurements, discovered the cathode rays
developed the first practically important direct current generator (dynamo) and showed that it can be reversed to a direct current motor
credited with producing the first electric light bulb
discovered photo-conductivity of selenium in 1873
invented the first telegraph system printing the text
invented in 1859 rechargeable lead-acid battery used till now in almost every car
a German inventor, was the first to make a telephone
co-inventor of telephone, creator of one of the first electronic musical instruments
developed numerous physical instruments and devices, particularly, electrostatic machines
pioneer discoverer and promoter of electrochemical nickel-plating process, who largely introduced it in industry
played important role in the discovery of the photoelectric effect
measured propagation of electrical impulses in nerve and developed the respective theory that became the beginning of bioelectrochemistry
French engineer who in 1866 invented the battery that bears his name
produced the first prototype of a dry battery
developed one of the first hydrogen-oxygen fuel cells
(1840-1910)
investigated the electroconductive properties of electrolytes and contributed to the understanding of their behaviour
invented a DC electric generator (dynamo)
made the first experiments to transmit electrical power over long distance
French physicist, co-inventor of wireless telegraphy
Hungarian inventor, telephone pioneer and Thomas Edison's colleague, invented the switchboard and built Europe's first telephone exchange, inventor of the "Telephonograph" (forerunner to radio) and Telephone News
best known for his contributions to optics and electricity, invented the capillary electrometer used in early electrocardiographs, received the Nobel Prize for Physics in 1908 for producing the first colour photographic plate
developed "the Baudot printing telegraph" and the Baudot code used in his telegraph system
physicist and electrical engineer discovered rotating magnetic field and developed alternating-current motors; "father" of three-phase alternating current
designed an arc-light generator with Elihu Thomson
a brilliant experimentalist who did seminal work on electricity and magnetism, e.g. suggested and supervised the experiments which led Edwin Hall, one of his graduate students, to the discovery of the Hall effect
considered the "Father of Modern Electronics" he invented the first true electron tube
an American pioneer, inventor and industrialist in the commercial development of electricity; he developed an electric arc lighting system and devised a generator to power it
outstanding British consulting electrical engineer and expert witness, worked on electromagnetic occurrences in dynamos and the theory of dielectrics, devised the three-phase system for the transmission of electricity
founded the Weston Electrical Instrument Company, developed a precision instrument to accurately measure electrical current, a device which became the basis for the voltmeter, ammeter and watt meter
discovered rectifying properties of semiconductive materials, constructed the first oscilloscope, shared the Nobel Prize 1909 with Guglielmo Marconi for wireless telegraphy
introduced the first effective devices for the long distance transmission of alternating current electrical energy by varying voltage and current (transformers)
developed Hertz's work on electromagnetic waves and made it more exact using a new type of oscillator
adapted complex numbers to the study of electrical circuits, reformulated Maxwell's field equations in terms of electric and magnetic forces and energy flux, predicted the existence of the ionosphere
