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This is an accepted version of this page This is the latest accepted revision, reviewed on 27 December 2024. Type of clock A traditional wind-up (key-wound), mechanical spring-powered alarm clock An alarm clock or alarm is a clock that is designed to alert an individual or group of people at a specified time. The primary function of these clocks is to awaken people from their night's sleep or ...
The force of the mainspring then turns the clock's wheels as it unwinds, until the next winding is needed. The adjectives wind-up and spring-powered refer to mechanisms powered by mainsprings, which also include kitchen timers, metronomes, music boxes, wind-up toys and clockwork radios.
Wind-up toys – often as a simple mechanical motor, or to create automata. These may be either key-wound, as were many 20th-century model trains, or a simpler pullback motor. Most photographic camera leaf shutters use a clockwork mechanism not unlike that of wristwatches to time the opening and closing of the shutter blades.
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This movement has a "bell-back" design, meaning that the bell mechanism is integral to the clock's case. The company first brought the Big Ben to market in 1909. The company's name was shortened to "Western Clock Company" in 1912. In 1910, the Big Ben became the first alarm clock advertised nationally, with ads placed in the Saturday Evening Post.
The use of an inappropriate key to wind a clock is one such improper procedure. The manner in which a clock is wound is also important, as "[...] considerable and potentially expensive damage can be caused by not winding gently and steadily", [8] as well as by turning the key too many times. c. Unstable storage or display
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