How does a nonelectrical sewing machine work?

A nonelectrical sewing machine operates using mechanical components, typically powered by a hand crank or foot pedal. The user manually rotates the crank or presses the pedal, which engages gears and levers to move the needle up and down through the fabric. As the needle pierces the material, it pulls thread from a spool and creates stitches by interlocking it with a lower thread, usually from a bobbin. This process allows for sewing without the need for electricity.