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Numerous people were intent on inventing the electric clock with electromechanical and electromagnetic designs around the year 1840, such as Wheatstone, Steinheil, Hipp, Breguet, and Garnier, both in Europe and America. Matthäus Hipp, clockmaker born in Germany, is credited with establishing the production series, mass marketable electric clock.
In 1940, Warren invented the "singing clock", which instead of a pendulum had a vibrating metal string. [2] General Electric acquired a half interest in Telechron in 1929, and full interest in 1943. [2] Telechron's clocks remained popular into the 1950s; the company eventually went out of business in 1992.
The following is a list of American companies that produced, or currently produce clocks. Where known, the location of the company and the dates of clock manufacture follow the name. Samuel Abbott; Montpelier, Vermont (1830–1861) Ansonia Clock Company; Ansonia, Connecticut and Brooklyn, New York (1851–1929)
Telechron alarm clocks are particularly popular with collectors. Until about 1940, the overwhelming majority of Telechron alarm clocks had bell alarms. The entire mechanism was enclosed in a bell housing of steel. Atop the clock's coil was a metal strip that vibrated at 60 cycles per second when the alarm was tripped.
The invention of the verge and foliot escapement in c.1275 [87] was one of the most important inventions in both the history of the clock [88] and the history of technology. [89] It was the first type of regulator in horology. [6] A verge, or vertical shaft, is forced to rotate by a weight-driven crown wheel, but is stopped from rotating freely ...
American engineer Edwin Howard Armstrong developed the electronic oscillator. 1915: French physicist Paul Langevin and Russian engineer Constantin Chilowsky invented sonar. 1917: American engineer Alexander M. Nicholson invented the crystal oscillator. 1918: French physicist Henri Abraham and Eugene Bloch invented the multivibrator. 1919
Digital clocks typically use the 50 or 60 hertz oscillation of AC power or a 32,768 hertz crystal oscillator as in a quartz clock to keep time. Most digital clocks display the hour of the day in 24-hour format; in the United States and a few other countries, a commonly used hour sequence option is 12-hour format (with some indication of AM or PM).
The electric clock was patented in 1840, and electronic clocks were introduced in the 20th century, becoming widespread with the development of small battery-powered semiconductor devices. The timekeeping element in every modern clock is a harmonic oscillator, a physical object that vibrates or oscillates at a particular frequency. [2]