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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 (SWCC) was a major manufacturer of electromechanical clocks from 1886 until about 1970. [1] Based in New York City, the company was one of the first to power its clocks with an electric motor instead of winding by hand. A patented clock mechanism automatically rewinds the main spring each hour by the small ...
[3] The company's first offering, an innovative model which ran for eight days without winding, was a commercial failure, being too expensive to make economically, with about 19 pieces produced. A second, more conventional model with a 36-hour power reserve was put into production and met with success in the marketplace. [6]
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 ...
[3] Harwood self-winding watch. In 1923, supported by a local businessman, he developed a self-winding wristwatch and applied for a patent in Switzerland, which was granted in September, 1924. His design ensured that the watch could be hermetically sealed against the ingress of water or dust.
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]
Huygens' maintaining power in use. The weight drive used by Christiaan Huygens in his early clocks acts as a maintaining power. In this layout, the weight which drives the clock is carried on a pulley and the cord (or chain) supporting the weight is wrapped around the main driving wheel on one side and the rewinding wheel on the other.
Clocks from Winterhalder & Hofmeier are mechanical precision clocks with the quality standards of Black Forest craftsmanship. [4] [5] The numbers of the dial face are in Roman numerals. The dial face is embraced by wood. [6] The clocks can be identified by the engraved W & H SCH initial letters. Most of the clocks were made from 1850 to 1933.
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