Simple locks {lock} {lock and key}|, for chests or cases, have a keyhole and a key that looks like a little flag {key, lock}. When flag turns 360 degrees in lock, flag pushes a pin that slides a bolt in or out.
Door locks can use a key with blade ridges and slots on blade sides. Lock has a barrel. In lock barrel and wall are five small rods {pin} on springs in vertical tubes. Pins have two pieces, at different heights corresponding to ridges on key blade. When key is in lock, dividing lines for pins are at same radius as barrel radius, so barrel can turn. Barrel turn moves a bolt.
Locks {combination lock}| can have three discs. First disc connects to a knob and has a protrusion. The protrusion hits a protrusion on second disc, which has a protrusion that hits third-disc protrusion. Turning knob, to turn first disc two complete clockwise turns, engages the three discs. At first number, knob stops and turns counter-clockwise. Only first disc moves. After complete turn, second disc engages again. At second number, knob stops and turns clockwise. Only first disc moves. At third number, first disc stops and disc notches align. Bolt can slide past disc edges.
ankle cuff or chain {fetter}.
handcuff {manacle}.
Door locks {night latch}| can have an inside knob and an outside keyhole.
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Date Modified: 2022.0225