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A modern LF radio-controlled clock. A radio clock or radio-controlled clock (RCC), and often colloquially (and incorrectly [1]) referred to as an "atomic clock", is a type of quartz clock or watch that is automatically synchronized to a time code transmitted by a radio transmitter connected to a time standard such as an atomic clock.
An easy way to do this is to set a clock or watch so it shows "sundial time" [b] which is standard time, [c] plus the equation of time on the day in question. [ d ] The hour-lines on the sundial are marked to show the positions of the shadow of the style when this clock shows whole numbers of hours, and are labelled with these numbers of hours.
A clock network or clock system is a set of synchronized clocks designed to always show exactly the same time by communicating with each other. Clock networks usually consist of a central master clock kept in sync with an official time source, and one or more slave clocks which receive and display the time from the master.
Emerson Radio & Phonograph converted to military production for World War II in 1942, when it held one-sixth of the U.S. radio market. In 1943, it became a public corporation, when it offered over 40 percent of its stock to the public for $12 a share. In 1947, among its first post-war products, Emerson offered a television set with a 10-inch ...
A mid-1940s alarm clock radio with AM radio stations only A typical 1980s clock radio featuring a digital clock/alarm and an analogue FM/MW/LW receiver. A clock radio is an alarm clock and radio receiver integrated in one device. [18] The clock may turn on the radio at a designated time to wake the user, and usually includes a buzzer alarm.
Admiral radio-phonograph, c. 1950, at the Lamar County Historical Museum. In 1934 in Chicago, Illinois, Ross Siragusa founded Continental Radio and Television Corporation (CRTC), which produced consumer electronics such as radios and phonographs. [1] The radios were designed and produced by Radio Products Corporation (RPC), owned by Irwin J ...
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