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Guglielmo Giovanni Maria Marconi [11] [12] was born in Palazzo Marescalchi in Bologna on 25 April 1874, the second son of Giuseppe Marconi (an Italian aristocratic landowner from Porretta Terme who lived in the countryside of Pontecchio) and his Irish wife Annie Jameson (daughter of Andrew Jameson of Daphne Castle in County Wexford, a land agent, and wife Margaret, daughter of James Cochrane ...
Before the discovery of electromagnetic waves and the development of radio communication, there were many wireless telegraph systems proposed and tested. [4] In April 1872 William Henry Ward received U.S. patent 126,356 for a wireless telegraphy system where he theorized that convection currents in the atmosphere could carry signals like a telegraph wire. [5]
The first car radio was introduced in 1922, but it was so large that it took up too much space in the car. [70] The first commercial car radio that could easily be installed in most cars went for sale in 1930. [71] [72]
Radio buttons are arranged in groups of two or more and displayed on screen as, for example, a list of circular holes that can contain white space (for unselected) or a dot (for selected). Each radio button is normally accompanied by a label describing the choice that the radio button represents.
The company Columbia Records developed the first portable record player that can be connected to any tube radio. It also created the first radio / phonograph combinations, the precursor to the 1960s music chests. Daylygraph wire recorder. The German physicist Curt Stille (1873–1957) records magnetic sound for film, on a perforated steel band.
The first known anchor escapement clock was built by the English clockmaker William Clement in 1671 for King's College, Cambridge, [131] now in the Science Museum, London. [132] The anchor escapement originated with Hooke, although it has been argued that it was invented by Clement, [ 133 ] or the English clockmaker Joseph Knibb .
Dick Button, the two-time Olympic champion who revolutionized figure skating and literally took the sport to new heights, died Thursday, US Figure Skating said. He was 95 years old.
Grote Reber (December 22, 1911 – December 20, 2002) was an American pioneer of radio astronomy, which combined his interests in amateur radio and amateur astronomy.He was instrumental in investigating and extending Karl Jansky's pioneering work and conducted the first sky survey in the radio frequencies.