lever
simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum
pedal
foot-actuated lever used to control, power, or otherwise operate machinery
typebar
part of a mechanical typewriter
rocker arm
oscillating lever in engine
key
key of wind instruments
shadoof
irrigation tool
track switch
mechanical installation providing a branching of a track (railway track or other uncommon type of track)
gear stick
lever for shifting gears manually
water key
valve of a brass instrument which empties respiratory fluid from the body of the instrument
phonograph tone arm
movable part of a phonograph that carries the pickup and permits the needle to follow the record groove
seesaw
long, narrow board pivoted in the middle
pedal crank
lever attached to a shaft with a foot tread for placing a foot on the free end