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Standard-quality 32 768 Hz resonators of this type are warranted to have a long-term accuracy of about six parts per million (0.0006%) at 31 °C (87.8 °F): that is, a typical quartz clock or wristwatch will gain or lose 15 seconds per 30 days (within a normal temperature range of 5 to 35 °C or 41 to 95 °F) or less than a half second clock ...
Picture of a quartz crystal resonator, used as the timekeeping component in quartz watches and clocks, with the case removed. It is formed in the shape of a tuning fork. Most such quartz clock crystals vibrate at a frequency of 32 768 Hz. The piezoelectric properties of crystalline quartz were discovered by Jacques and Pierre Curie in 1880.
Howard Miller Clock Company was founded in 1926, as the Herman Miller Clock Company division of office furniture manufacturer Herman Miller, specializing in chiming wall and mantle clocks. [2] It was spun off in 1937 and renamed, under the leadership of Herman Miller's son Howard C. Miller (1905–1995). [ 3 ]
German clockmakers. Johann Baptist Beha (1815–1898) Gustav Becker Clock Company; Freiburg in Schlesien, Silesia (1850–1938) Florn. Thomas Haller (Thomas Haller AG), Schwenningen (1880-1900) then merged with Junghans. Thomas Ernst Haller (Haller AG), Schwenningen (1902-1928) then merged with Kienzle.
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The Waltham Watch Company, also known as the American Waltham Watch Co. and the American Watch Co., was a company that produced about 40 million watches, clocks, speedometers, compasses, time delay fuses, and other precision instruments in the United States of America between 1850 and 1957. The company's historic 19th-century manufacturing ...
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