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A torsion pendulum clock, more commonly known as an anniversary clock or 400-day clock, is a mechanical clock which keeps time with a mechanism called a torsion pendulum. This is a weighted disk or wheel, often a decorative wheel with three or four chrome balls on ornate spokes, suspended by a thin wire or ribbon called a torsion spring (also ...
The following is a list of American companies that produced, or currently produce clocks. Where known, the location of the company and the dates of clock manufacture follow the name. Samuel Abbott; Montpelier, Vermont (1830–1861) Ansonia Clock Company; Ansonia, Connecticut and Brooklyn, New York (1851–1929)
The Self Winding Clock Company clock movement was patented by one of the company founders, Chester Henry Pond (1844–1912) in 1884 (Patent No. 308,521). Pond was also a principal in the Gamewell Fire Alarm-Telegraph Company. [2] He was an accomplished instrument maker and a pioneer in the developing field of electricity.
In striking clocks, the striking train is a gear train that moves a hammer to strike the hours on a gong. It is usually driven by a separate but identical power source to the going train. In antique clocks, to save costs, it was often identical to the going train, and mounted parallel to it on the left side when facing the front of the clock. [11]
The first Atmos clock was designed by Jean-Léon Reutter, an engineer in Neuchâtel, Switzerland, in 1928. [5] [6] [7] This noncommercial prototype, which predated the Atmos name but is now known unofficially as Atmos 0, was driven by a mercury-in-glass expansion device. The mechanism operated on temperature changes alone. [8] [5] [6]
After winding, the arbor is stationary and the pull of the mainspring turns the barrel, which has a ring of gear teeth around it. This meshes with one of the clock's gears, usually the center wheel pinion and drives the wheel train. The barrel usually rotates once every 8 hours, so the common 40-hour spring requires 5 turns to unwind completely.
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Sir John Bennett; 65 Cheapside, London, watch, clock and jewellery manufacturer (15 October 1814- 3 July 1897), was a watchmaker and local politician. He was the eldest son of John Bennett, watchmaker, of Greenwich. Edward East, clockmaker to King Charles I. Chas Goodall (Clockmaker)1793-1818 26 Bridges St, Covent Garden. [5]
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