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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 parts, machinery and key skilled workers were shipped out of the USA to form the basis, along with the remains of a watch company purchased a year later, of the clock and watch industry in Moscow such as Poljot and Sekonda. In 1969, the rights to the name, trademarks, and goodwill were transferred to Ansonia Clock Co., Inc., Lynnwood ...
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.
The escapement is a mechanism in a mechanical clock that maintains the swing of the pendulum by giving it a small push each swing, and allows the clock's wheels to advance a fixed amount with each swing, moving the clock's hands forward. The anchor escapement was so named because one of its principal parts is shaped vaguely like a ship's anchor.
A torsion pendulum clock requiring only annual winding is sometimes called a "400-Day clock" or "anniversary clock", sometimes given as a wedding gift. Torsion pendulums are also used in "perpetual" clocks which do not need winding, as their mainspring is kept wound by changes in atmospheric temperature and pressure with a bellows arrangement.
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 Reference 57260 took eight years to assemble, and has 2826 parts and 31 hands. It weighs 957 g (2.11 lb), and spans 98 millimetres (3.9 in). The Patek Philippe Calibre 89 has 33 complications, using a total of 1728 parts. It was released in 1989 to commemorate the 150th anniversary of the company. [16]
Within a few years the Sessions Clock Company was producing clock movements, cases, dials, artwork and castings for their line of mechanical clocks. Between 1903 and 1933 Sessions produced 52 models of mechanical clocks, ranging from Advertisers, large and small clocks with logos of various businesses, to wall, or regulator clocks, and shelf or ...