Clock parts {escapement}| can transfer power from main spring to gears, by oscillating. Escapement has pendulum, ratchet, and gear.
spring
Springs {mainspring} are coiled or flat steel ribbon, which is wound to provide energy.
oscillation
Clocks with a hanging pendulum use gravity for back-and-forth oscillation. Weight hangs on chain, as in cuckoo clocks. Clocks with a circular pendulum use a hairspring and lever for oscillation.
Pendulum connects to ratchet, which engages gear teeth. Alternatively, ratchet can press against gears to escapement wheel, so wheel turns one notch if released by ratchet. The mechanism pushes ratchet lightly, which pushes pendulum slightly and keeps pendulum moving in spite of friction.
process
Oscillation in one direction moves gear one step forward. Oscillation in other direction moves ratchet into position to receive next forward motion. Oscillation takes a fixed time, which shortening or lengthening can adjust.
Practical Affairs>Machine>Kinds>Instrument>Clock
7-Machine-Kinds-Instrument-Clock
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Date Modified: 2022.0224