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Reginald Aubrey Fessenden (October 6, 1866 – July 22, 1932) was a Canadian electrical engineer and inventor who received hundreds of patents in fields related to radio and sonar between 1891 and 1936 (seven of them after his death). Fessenden pioneered developments in radio technology, including the foundations of amplitude modulation (AM ...
The list of Reginald Fessenden patents contains the innovation of his pioneering experiments. Reginald Aubrey Fessenden received hundreds of patents for devices in fields such as high-powered transmitting, sonar, and television.
A Fessenden oscillator is an electro-acoustic transducer invented by Reginald Fessenden, with development starting in 1912 at the Submarine Signal Company of Boston. [1] It was the first successful acoustical echo ranging device.
On 23 December 1900, the Canadian-born American inventor Reginald A. Fessenden became the first person to send audio (wireless telephony) by means of electromagnetic waves, successfully transmitting over a distance of about a mile (1.6 kilometers,) and six years later on Christmas Eve 1906 he became the first person to make a public wireless ...
The invention of amplitude-modulated (AM) radio, which allows more closely spaced stations to simultaneously send signals (as opposed to spark-gap radio, where each transmission occupies a wide bandwidth) is attributed to Reginald Fessenden, Valdemar Poulsen and Lee de Forest.
Fessenden's receiver did not see much application because of its local oscillator's stability problem. A stable yet inexpensive local oscillator was not available until Lee de Forest invented the triode vacuum tube oscillator. [8] In a 1905 patent, Fessenden stated that the frequency stability of his local oscillator was one part per thousand. [9]
Fathometer – an early form of sonar invented by Reginald Fessenden in 1919 [7] Gramophone – co-invented by Alexander Graham Bell in 1889; Fessenden barretter. Hot-wire barretter – invented by Reginald Fessenden in 1902; Newsprint and pulped-wood paper – invented by Charles Fenerty in 1838 [7] Pager – invented by Irving "Al" Gross in ...
Electrolytic detector, consisting of a metal cup with nitric acid and a fine platinum wire with the tip dipping in the acid. An electrolytic detector, or liquid barretter, is a type of detector (demodulator) used in early radio receivers.