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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 ...
Kieninger & Obergfell Uhrenfabrik (KUNDO trademark), Sankt Georgen (1918 - recent) Kienzle Uhren, Schwenningen - Schlenker and Keinzle until c1897 (1883-1996) Franz Ketterer; Lenzkirch Clock Co (Aktiengessellschaft fur Ukrenfabrikation) (1851-1929) factory operated by Junghans 1929-1932; Mauthe Clock Company (c1870 - 1976)
Mini ceiling fans are mostly found in less developed places, such as the Philippines and Indonesia, and today are constructed similarly to most oscillating pedestal and table fans, predominantly out of plastic. These fans, hence the name "mini" ceiling fan are relatively small in size, usually ranging from 40.64 cm to 91.44 cm, however, some ...
Clocks can be simple display objects if they are not required to run. This reduces the physical force on the clock. Whereas "running any functional object will result in wear and handling, which contributes to the degradation of the parts. Replacing the inner workings of a clock still requires handling, which could potentially damage the clock.
In architecture, a pendentive is a constructional device permitting the placing of a circular dome over a square room or of an elliptical dome over a rectangular room. [1] The pendentives, which are triangular segments of a sphere, taper to points at the bottom and spread at the top to establish the continuous circular or elliptical base needed for a dome. [2]
A lighthouse clock is a type of mantel clock manufactured in the U.S. from 1818 through 1830s by the American clockmaker Simon Willard, having the dial and works exposed beneath a glass dome on a tapered, cylindrical body. They were also made by Simon Willard & Son, a partnership between the clockmaker and his son Simon Willard Jr. created in 1823.
A projection clock (also called ceiling clock) is an analogue or digital clock equipped with a projector that creates an enlarged image of the clock face or display on any surface usable as a projection screen, most often the ceiling. [1] The clock can be placed almost anywhere if only the projected image must be seen. The image generated by ...
An analog pendulum clock made around 18th century. A clock or chronometer is a device that measures and displays time.The clock is one of the oldest human inventions, meeting the need to measure intervals of time shorter than the natural units such as the day, the lunar month, and the year.