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A grandfather clock (also a longcase clock, tall-case clock, grandfather's clock, hall clock or floor clock) is a tall, freestanding, weight-driven pendulum clock, with the pendulum held inside the tower or waist of the case. Clocks of this style are commonly 1.8–2.4 metres (6–8 feet) tall with an enclosed pendulum and weights, suspended by ...
Before servicing, mainsprings are “let down” gently by pulling the click back while holding the winding key, allowing the spring to slowly unwind. However, even in their “let down” state, mainsprings contain dangerous residual tension. Watchmakers and clockmakers use a tool called a "mainspring winder" to safely install and remove them ...
He made clocks that would run up to one year on a winding. He also made precision astronomical regulator clocks based on the torsion pendulum, but only four were sold. The German Anton Harder apparently independently invented and patented the torsion clock in 1879-1880. [ 4 ]
Keys of various sizes for winding up mainsprings on clocks Mechanism of a Wall Clock, Ansonia Co. 1904. The stored amounts of energy used by a given piece during its operation is often housed within it; this frequently happens via a winding device that applies mechanical stress to an energy-storage mechanism such as a mainspring, thus involving some form of escapement.
Thomas Edison visited the factory in 1878 to experiment combining clocks with his newly developed phonograph, but the experiments proved unviable. By 1879, a second factory was opened in Brooklyn, New York and by June 1880 employed 360 workers, while the Connecticut factory continued producing clocks as well with a workforce of 100 men and 25 ...
Engraved initial letters on back of Winterhalder & Hofmeier clocks from Schwaerzenbach, Black Forest, Germany The firm Winterhalder Uhrenfabrik was established in 1810 by Thomas Winterhalder. Even his grandfather Nikolaus Winterhalder (1710-1743) made quality Black Forest clocks with wooden cogs and weights from stones. [ 1 ]
The core of the keyless mechanism is a gear on the watch's winding stem, the clutch (or castle wheel in Britain), with two sets of axial gear teeth on it, which slides in and out. When the stem is pushed in, a lever slides the clutch out, and the outer set of teeth engages a small wheel train which turns the mainspring arbor, winding the ...
Carriage clock, Armand Couaillet Matthew Norman carriage clock with winding key. A carriage clock is a small, spring-driven clock, designed for travelling, developed in the early 19th century in France. The first carriage clock was invented by Abraham-Louis Breguet for the Emperor Napoleon in 1812.
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