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The lever escapement, invented by the English clockmaker Thomas Mudge in 1754 (albeit first used in 1769), is a type of escapement that is used in almost all mechanical watches, as well as small mechanical non-pendulum clocks, alarm clocks, and kitchen timers.
The first form of the indices of the European E855 came with attached Arabic numerals "12" instead of the "JL" logo on later models. The last two forms of the indices came with an attached triangle on the central alarm disc of the clock to indicate the alarm, while in the earlier models the triangle was painted on the alarm indication disc.
The Ottoman engineer Taqi ad-Din described a weight-driven clock with a verge-and-foliot escapement, a striking train of gears, an alarm, and a representation of the Moon's phases in his book The Brightest Stars for the Construction of Mechanical Clocks (Al-Kawākib al-durriyya fī wadh' al-bankāmat al-dawriyya), written around 1565. [119]
The following is a list of notable companies that produced, or currently produce clocks. Where known, the location of the company and the dates of clock manufacture follow the name. In some instances the "company" consisted of a single person.
This is an accepted version of this page This is the latest accepted revision, reviewed on 23 January 2025. Type of clock A traditional wind-up (key-wound), mechanical spring-powered alarm clock An alarm clock or alarm is a clock that is designed to alert an individual or group of people at a specified time. The primary function of these clocks is to awaken people from their night's sleep or ...
A Roskopf, pin-lever, or pin-pallet escapement is an inexpensive, less accurate version of the lever escapement, used in mechanical alarm clocks, kitchen timers, mantel clocks and, until the 1970s, cheap watches now known as pin lever watches. It was popularized by German watchmaker Georges Frederic Roskopf in its "proletarian watch" from 1867 ...
An advertisement from 1916 showing picture of the factory claimed that it employed 1.500 workers and produced 3.000 time-pieces daily. By 1920 the company was also producing alarm clocks. In 1924, a branch was established at Lommiswil, and the following year also an agency in La Chaux-de-Fonds. A 1959 advert boasted that a large new factory ...
In 1956, the company used its expertise with clocks to inaugurate an alarm function on its Calibre 601 model wristwatch. [16] The first Oris Diver was released in 1965, with large cardinal numbers highlighted by inverted lume wedges and using Oris' in-house movements calibre 654 and calibre 484. [ 17 ]
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