Editing Clockwork (section)

==Examples==
The most common examples are mechanical [[clock]]s and watches. Other uses, most but not all obsolete, include:
* [[Wind-up toy]]s – often as a simple mechanical motor, or to create [[automaton|automata]]. These may be either key-wound, as were many 20th-century [[Rail transport modelling#Clockwork|model trains]], or a simpler [[pullback motor]].
* Most photographic [[camera]] [[Shutter (photography)#Leaf shutter|leaf shutters]] use a clockwork mechanism not unlike that of wristwatches to time the opening and closing of the shutter blades.
* Mechanisms to turn the lens of [[lighthouse]]s before electric motors.
* [[Mechanical calculator]]s, used before small [[electronic calculator]]s became available in the 1970s. Relatively small calculators were used, for example, for companies' financial calculations. 
* [[Mechanical computer]]s, much more complex and larger than mechanical calculators, such as [[Babbage]]'s [[difference engine|difference]] and [[analytical engine]]s.
* Astronomical models, such as [[orrery|orreries]] whose history spans hundreds of years.
* [[Music box]]es, which were very popular during the 19th century and at the beginning of the 20th.
* Almost all musical record-playing [[phonograph]]s (gramophones) built before the 1930s.
* Hand-powered electrical equipment, such as a [[clockwork radio]], where an energy-storing spring accounting for much of the size and weight of the device rotates a much smaller electric [[Electrical generator|generator]]; such equipment is very popular where [[Battery (electricity)|batteries]] and mains power (house current) are scarce.

{{multiple image
| align = center
| direction = horizontal
| header   =
| image1   = Movement of a grandfather clock.jpg
| caption1 = Movement of a grandfather clock with striking mechanism
| width1   = 107
| image2   = Spieluhr 02 Dscf4024.jpg
| caption2 =  Clockwork music box
| width2   = 178
| image3   = Deutsches Uhrenmuseum 2117 (Junghans).jpg
| caption3 = Exhibition model of an alarm clock mechanism with two mainsprings ''(black spirals)''
| width3   = 120
| image4   = Babbages difference engine 1832.jpg
| caption4 = Charles Babbage's Difference Engine No.1, in Science Museum, London.  The first computer.
| width4   = 145
| image5   = Mechanical egg timer internals.jpg
| caption5 = Plastic clockwork motor of a modern kitchen timer
| width5   = 165
| footer   =
}}