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Jewel bearing of a balance wheel, supported by a lyre-shaped spring. The Incabloc shock protection system is the trade name for a spring-loaded mounting system for the jewel bearings that support the balance wheel in a mechanical watch, to protect the wheel's delicate pivots from damage in the event of physical shock, such as if the watch is dropped.
Rotary Watches Ltd was established at La Chaux-de-Fonds, Switzerland by Moise Dreyfuss in 1895. By the 1920s family members Georges and Sylvain Dreyfuss began exporting Rotary watches to Britain, which was to become the company's most successful market. Rotary later became the official watch supplier for the British Army.
A balance wheel, or balance, is the timekeeping device used in mechanical watches and small clocks, analogous to the pendulum in a pendulum clock.It is a weighted wheel that rotates back and forth, being returned toward its center position by a spiral torsion spring, known as the balance spring or hairspring.
Benrus is an American watchmaking and lifestyle company founded as a watch repair shop in New York City in 1921 by Romanian-American Benjamin Lazrus and his two brothers. [ 1 ] [ 2 ] Benrus watches were worn for decades by the U.S. military from World War II through Vietnam .
Rotary Watches: 1895 La Chaux-de-Fonds: Moise Dreyfuss Elm Yard, 13-16 Elm Street, United Kingdom Privately held company: Dreyfuss Group Ltd. Sandoz (watch company) Tavannes: Henri Sandoz Schwarz Etienne: 1902 Paul Arthur Schwarz and Olga Etienne La Chaux-de-Fonds: Privately held company: Solvil et Titus: 1892 Paul Ditisheim: Hong Kong, Hong Kong
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Watches and smaller clocks do not use pendulums as the timing device. Instead, they use a balance spring : a fine spring connected to a metal balance wheel that oscillates (rotates back and forth). Most modern mechanical watches have a working frequency of 3–4 Hz (oscillations per second) or 6–8 beats per second (21,600–28,800 beats per ...
The Geneva drive or Geneva mechanism is a gear mechanism that translates a continuous rotation movement into intermittent rotary motion. The rotating drive wheel is usually equipped with a pin that reaches into a slot located in the other wheel (driven wheel) that advances it by one step at a time. The drive wheel also has an elevated circular ...
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