Thomas Alva Edison (February 11, 1847-October 18, 1931) was an American inventor and businessman.
He developed many devices in fields such as electric power generation, mass communication, sound recording, and motion pictures.
These inventions, which include the phonograph, the motion picture camera, and early versions of the electric light bulb, have had a widespread impact on the modern industrialized world He was one of the first inventors to apply the principles of organized science and teamwork to the process of invention, working with many researchers and employees. He established the first industrial research laboratory.
Edison was raised in the American Midwest; early in his career, he worked as a telegraph operator, which inspired some of his earliest inventions.
In 1876, he established his first laboratory facility in Menlo Park, New Jersey, where many of his early inventions were developed. He later established a botanical laboratory in Fort Myers, Florida, in collaboration with businessmen Henry Ford and Harvey S. Firestone, and a laboratory in West Orange, New Jersey, that featured the world's first film studio, the Black Maria.
He was a prolific inventor, holding 1,093 US patents in his name, as well as patents in other countries. Edison married twice and fathered six children.
He died in 1931 of complications of diabetes.
More information: Rutgers
A phonograph, in its later forms also called a gramophone, as a trademark since 1887 as a generic name in the UK since 1910, or since the 1940s called a record player, or more recently a turntable, is a device for the mechanical and analogue recording and reproduction of sound.
The sound vibration waveforms are recorded as corresponding physical deviations of a spiral groove engraved, etched, incised, or impressed into the surface of a rotating cylinder or disc, called a record. To recreate the sound, the surface is similarly rotated while a playback stylus traces the groove and is therefore vibrated by it, very faintly reproducing the recorded sound.
In early acoustic phonographs, the stylus vibrated a diaphragm which produced sound waves which were coupled to the open air through a flaring horn, or directly to the listener's ears through stethoscope-type earphones.
The phonograph was invented in 1877 by Thomas Edison. Alexander Graham Bell's Volta Laboratory made several improvements in the 1880s and introduced the graphophone, including the use of wax-coated cardboard cylinders and a cutting stylus that moved from side to side in a zigzag groove around the record.
In the 1890s, Emile Berliner initiated the transition from phonograph cylinders to flat discs with a spiral groove running from the periphery to near the center, coining the term gramophone for disc record players, which is predominantly used in many languages. Later improvements through the years included modifications to the turntable and its drive system, the stylus or needle, pickup system, and the sound and equalization systems.
More information: Library of Congress
The disc phonograph record was the dominant commercial audio recording format throughout most of the 20th century.
In the mid-1960s the use of 8-track cartridges and cassette tapes were introduced as alternatives. In the 1980s, phonograph use declined sharply due to the popularity of cassettes and the rise of the compact disc, as well as the later introduction of digital music distribution in the 2000s.
However, records are still a favorite format for some audiophiles, DJs, collectors, and turntablists (particularly in hip hop and electronic dance music), and have undergone a revival since the 2000s.
Several inventors devised machines to record sound prior to Thomas Edison's phonograph, Edison being the first to invent a device that could both record and reproduce sound. The phonograph's predecessors include Édouard-Léon Scott de Martinville's phonautograph, and Charles Cros's paleophone.
Recordings made with the phonautograph were intended to be visual representations of the sound, but were never sonically reproduced until 2008.
Cros's paleophone was intended to both record and reproduce sound but had not been developed beyond a basic concept at the time of Edison's successful demonstration of the phonograph in 1877.
More information: The New York Times
The value of an idea lies in the using of it.
Thomas A. Edison
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