The most common examples are mechanical clocks and watches. Others include:
- Wind-up toys - often as a simple mechanical motor, or to create automata. These may be either key-wound, or a simpler pullback motor.
- Most 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 lighthouses before electric motors.
- Mechanical calculators, used before electronic computers were developed around World War 2. Among the most complex were Babbage's difference and analytical engines, which were mechanical versions of computers.
- Astronomical models, such as orreries whose history spans hundreds of years.
- Music boxes, which were very popular during the 19th century and at the beginning of the 20th.
- Almost all phonographs 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 spins a much smaller electric generator; such equipment is very popular where batteries and mains power (house current) are scarce.
Music box clockwork
Exhibition model of an alarm clock mechanism with two mainsprings (black spirals)
Charles Babbage's Difference Engine No.1, in Science Museum, London. The first computer.
Plastic clockwork of a modern kitchen timer
Read more about this topic: Clockwork
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Famous quotes containing the word examples:
“There are many examples of women that have excelled in learning, and even in war, but this is no reason we should bring em all up to Latin and Greek or else military discipline, instead of needle-work and housewifry.”
—Bernard Mandeville (16701733)
“No rules exist, and examples are simply life-savers answering the appeals of rules making vain attempts to exist.”
—André Breton (18961966)
“Histories are more full of examples of the fidelity of dogs than of friends.”
—Alexander Pope (16881744)