Information about Edouard Branly
Édouard Eugène Désiré Branly (October 23, 1844 - March 24, 1940) was a French inventor and physicist. He was the physics professor at the Catholic University of Paris. He is primarily known for his early involvement in wireless telegraphy and his invention of the Branly coherer around 1890.
The coherer was the first widely used detector for radio communication. Branly built upon the discoveries of Temistocle Calzecchi-Onesti, who demonstrated in experiments in 1884 through 1886 that iron filings contained in an insulating tube will conduct an electrical current under the action of an electromagnetic wave. The operation of the coherer is based upon the large resistance offered to the passage of electric current by loose metal filings, which decreases under the influence of radio frequency alternating current. The coherer became the basis for radio reception, and remained in widespread use for about ten years. It was used by, amongst others, Guglielmo Marconi, in his early experiments. Oliver Joseph Lodge improved Edouard Branly's coherer as a detector of radio waves by adding a "trembler" which periodically dislodged clumped filings, thus restoring the device's sensitivity. The next innovation in radio wave detection, between Nikola Tesla's and Guglielmo Marconi's progress in radio in the 1890s and the 1948 invention of the the transistor, was John Ambrose Fleming's Fleming valve which replaced Branly's device for many uses.
In 1911 Branly was elected to the French Academy of Sciences
Edouard Branly died in 1940 and was interred in the Père Lachaise cemetery in Paris.
The quai Branly - a road that runs alongside the River Seine in Paris - is named after Branly. It is the name of this road, not of Branly himself, that led to the naming of the Musée du quai Branly.
Seine
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The coherer was the first widely used detector for radio communication. Branly built upon the discoveries of Temistocle Calzecchi-Onesti, who demonstrated in experiments in 1884 through 1886 that iron filings contained in an insulating tube will conduct an electrical current under the action of an electromagnetic wave. The operation of the coherer is based upon the large resistance offered to the passage of electric current by loose metal filings, which decreases under the influence of radio frequency alternating current. The coherer became the basis for radio reception, and remained in widespread use for about ten years. It was used by, amongst others, Guglielmo Marconi, in his early experiments. Oliver Joseph Lodge improved Edouard Branly's coherer as a detector of radio waves by adding a "trembler" which periodically dislodged clumped filings, thus restoring the device's sensitivity. The next innovation in radio wave detection, between Nikola Tesla's and Guglielmo Marconi's progress in radio in the 1890s and the 1948 invention of the the transistor, was John Ambrose Fleming's Fleming valve which replaced Branly's device for many uses.
In 1911 Branly was elected to the French Academy of Sciences
Edouard Branly died in 1940 and was interred in the Père Lachaise cemetery in Paris.
The quai Branly - a road that runs alongside the River Seine in Paris - is named after Branly. It is the name of this road, not of Branly himself, that led to the naming of the Musée du quai Branly.
See also
- Radio: History of radio, Invention of radio
- People: Alexander Stepanovich Popov, Karl Ferdinand Braun
- Other: List of people on stamps of France
External links and resources
- Eugenii Katz, "Edouard Eugène Désiré Branly". The history of electrochemistry, electricity and electronics; Biosensors & Bioelectronics.
- "Edouard Branly". Robert Appleton Company, The Catholic Encyclopedia, Volume II, 1907.
- "Edouard Eugène Désiré Branly"". Adventures in Cybersound.
October 23 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.
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1841 1842 1843 - 1844 - 1845 1846 1847
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March 24 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.
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Motto
Liberté, Égalité, Fraternité
"Liberty, Equality, Fraternity"
Anthem
"La Marseillaise"
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Liberté, Égalité, Fraternité
"Liberty, Equality, Fraternity"
Anthem
"La Marseillaise"
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An inventor is a person who creates or discovers new methods, means, or devices for performing a task. The word "inventor" comes form the latin verb invenire, invent-, to find.
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physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena spanning all length scales: from the sub-atomic particles from which all ordinary matter is made (particle physics) to the behavior of the material Universe as a whole
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Physics is the science of matter[1] and its motion[2][3], as well as space and time[4][5] —the science that deals with concepts such as force, energy, mass, and charge.
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The meaning of the word professor (Latin: person who professes to be an expert in some art or science, teacher of highest rank[1]) varies. In most English-speaking countries, it refers to a senior academic who holds a departmental chair
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The term Wireless Telegraphy is a historic term rarely used today except as applied to early radio telegraph communications. Wireless telegraphy originated as a term to describe electrical signaling without the electric wires to connect the end points.
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The coherer is a primitive form of radio signal detector, used in the late 19th century, consisting of a capsule of metal filings in the space, sometimes evacuated, between two electrodes.
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detector is a device that recovers information of interest contained in a modulated wave. The term dates from the early days of radio when all transmissions were in Morse Code, and it was only necessary to "Detect" the presence (or absence) of a radio wave using a device such as a
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Radio is the wireless transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space.
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Temistocle Calzecchi Onesti (December 14, 1853 – November 25, 1922) was an Italian physicist and inventor born at Lapedona, Italy, who demonstrated in experiments in 1884 through 1886 that iron filings contained in an insulating tube will conduct an electrical current under
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alternating current (AC) is an electrical current whose magnitude and direction vary cyclically, as opposed to direct current, whose direction remains constant. The usual waveform of an AC power circuit is a sine wave, as this results in the most efficient transmission of
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Guglielmo Marconi
Guglielmo Marconi
Born March 25 1874
Palazzo Marescalchi, Bologna, Italy
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Guglielmo Marconi
Born March 25 1874
Palazzo Marescalchi, Bologna, Italy
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Sir Oliver Joseph Lodge, FRS, (June 12,1851 - August 22, 1940), born at Penkhull in Stoke-on-Trent and educated at Adams' Grammar School, was a physicist and writer involved in the development of the wireless telegraph.
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Nikola Tesla
Никола Тесл?
I have harnessed the cosmic rays and caused them to operate a motive device.
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Никола Тесл?
I have harnessed the cosmic rays and caused them to operate a motive device.
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A transistor is a semiconductor device, commonly used as an amplifier or an electrically controlled switch. The transistor is the fundamental building block of the circuitry in computers, cellular phones, and all other modern electronic devices.
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Sir J. Ambrose Fleming
Born November 29 1849
Lancaster, Lancashire, England
Died March 18 1945 (aged 97)
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Born November 29 1849
Lancaster, Lancashire, England
Died March 18 1945 (aged 97)
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Fleming valve, also called the Fleming oscillation valve, was a vacuum tube diode invented by John Ambrose Fleming and used in the earliest days of radio communication.
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French Academy of Sciences (French: Académie des sciences) is a learned society, founded in 1666 by Louis XIV at the suggestion of Jean-Baptiste Colbert, to encourage and protect the spirit of French scientific research.
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Père-Lachaise Cemetery (French: Cimetière du Père-Lachaise) (officially, cimetière de l'Est “eastern cemetery”) is the largest cemetery in the city of Paris, France at 118 acres[1]
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Seine, see Seine River (disambiguation). For the old Seine département, see Seine (département). For a kind of fishing net, see seine (fishing).
Seine
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Ville de Paris
City flag City coat of arms
Motto: Fluctuat nec mergitur
(Latin: "Tossed by the waves, she does not sink")
The Eiffel Tower in Paris, as seen from the esplanade du Trocadéro.
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City flag City coat of arms
Motto: Fluctuat nec mergitur
(Latin: "Tossed by the waves, she does not sink")
The Eiffel Tower in Paris, as seen from the esplanade du Trocadéro.
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Musée du quai Branly, known in English as the Quai Branly Museum, nicknamed MQB, is a museum in Paris, France that features indigenous art, cultures and civilizations from Africa, Asia, Oceania, and the Americas.
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Radio is the wireless transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space.
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history of radio is the history of technology that produced instruments that use radio waves. Later in the timeline of radio, the history is dominated by programming and contents, which is closer to general history.
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invention of radio transmission of information as we know it today. Despite this, during its early development and long after wide acceptance, disputes persisted as to who could claim sole credit for this obvious boon to mankind.
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Alexander Stepanovich Popov (Russian: Александр Степанович Попов
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