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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 ...
While being set, it is turned by the setting mechanism – in modern clocks, a setting knob on the back of the clock. In watches during setting it is turned by the minute wheel, which is turned by the keyless works. In older clocks the setting was done by opening the face and manually pushing the minute hand which rotated the cannon pinion ...
The same timeline seems to apply in Europe, where mechanical escapements were used in clocks by that time. Up to the 15th century, clockwork was driven by water, weights, or other roundabout, relatively primitive means, but in 1430 a clock was presented to Philip the Good, Duke of Burgundy, that was driven by a spring. This became a standard ...
The movement of a digital watch is more commonly known as a module. In modern mass-produced clocks and watches, the same movement is often inserted into many different styles of case. When buying a quality pocketwatch from the mid-19th to the mid-20th century, for example, the customer would select a movement and case individually. Mechanical ...
Significs (Dutch: significa) is a linguistic and philosophical term introduced by Victoria, Lady Welby in the 1890s. It was later adopted [1] by the Dutch Significs Group (or movement) of thinkers around Frederik van Eeden, which included L. E. J. Brouwer, founder of intuitionistic logic, and further developed by Gerrit Mannoury and others.
Balance wheel in a 1950s alarm clock, showing the (1) balance spring and (2) regulator. Clip of operating balance wheel in a mantel clock, showing motion of balance spring (top center) A balance spring, or hairspring, is a spring attached to the balance wheel in mechanical timepieces.
Longcase clocks with 8-day movements made lantern clocks obsolete, and gradually lantern clocks disappeared from the London interiors in the first decades of the 18th century. In rural areas lantern clocks were produced until the beginning of the 19th century, and in those years they were also exported to countries like Turkey, and supplied ...
Produced Post Office/Official Government Vienna Regulators. Some clocks signed "Kreutz & Bauer in Wein". Gebr. Resch, Ebensee, Austria. Used trademark "REMEMBER". Factory began 1862 in Vienna, moved to Ebensee 1871. Produced up to 15,000 clocks in 1885. Factory sold to Junghans 1901 & renamed "Uhrenfabrik Ebensee Austria". Johann Mold, (c. 1870 ...