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.
Then the force of the mainspring turns the clockwork's gears, until the stored energy is used up.
The adjectives wind-up and spring-powered refer to mainspring-powered clockwork devices, which include clocks and watches, kitchen timers, music boxes, and wind-up toys.
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In the mid-16th century, Christiaan Huygens took an idea from Galileo Galilei and developed it into the first modern pendulum mechanism.