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The electric clock market grew rapidly in the 1930s, and Telechron's patented power interruption indicator gave his clocks an advantage over competing synchronous clocks, but by the 1950s battery-operated clocks that weren't dependent on the power grid took market share, and in the 1960s the quartz clock replaced synchronous clocks.
A feature of carriage clocks is the platform escapement, sometimes visible through a glazed aperture on the top of the case. Carriage clocks use a balance and balance spring for timekeeping and replaced the larger pendulum bracket clock. The factory of Armand Couaillet, in Saint-Nicolas d'Aliermont, France, made thousands of carriage clocks ...
The use of electricity then led to many variations of clock and motor designs. Electromechanical clocks were made as individual timepieces but most commonly were used as integral parts of synchronized time installations. Experience in telegraphy led to connecting remote clocks (slave clocks) via wires to a controlling (master clock) clock.
A bracket clock is a style of antique portable table clock made in the 17th and 18th centuries. [1] The term originated with small weight-driven pendulum clocks (sometimes called 'true bracket clocks') that had to be mounted on a bracket on the wall to allow room for their hanging weights. [ 2 ]
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]
In 1988, Rhythm introduced its series of musical clocks under the Small World brand (unrelated to the Disney ride "It's a Small World"). Such clocks from that early time period include the Small World Dual Bell Ringers and the Small World Performing Musicians, [ 3 ] which all utilized simple square waves for sound synthesis.
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