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Quartz clocks and quartz watches are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with very precise frequency , so that quartz clocks and watches are at least an order of magnitude more accurate than mechanical clocks .
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Lavet-type stepping motor of a quartz clock. A black rotor sprocket provides the mechanical output. The Lavet-type stepping motor has widespread use as a drive in electro-mechanical clocks [1] and is a special kind of single-phase stepping motor. Both analog and stepped-movement quartz clocks use the Lavet-type stepping motor (see Quartz clock).
On 25 December 1969, Seiko unveiled the Astron, the world's first quartz watch, which marked the beginning of the quartz revolution. [3] [4] [16] [18] The first Swiss quartz analog watch – the Ebauches SA Beta 21 – arrived at the 1970 Basel Fair. [16] [19] The Beta 21 was released by numerous manufacturers including the Omega Electroquartz.
Prior to 1880, Joseph Henry Eastman served as an apprentice watchmaker to Edward Howard, founder of E. Howard & Co. After serving his apprenticeship, Eastman would become one of the founders of Harvard Clock Company, which was granted a Massachusetts’ Certificate of Organization on November 20, 1880, starting as co-director alongside James H. Gerry.
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