ELI5: how did slot machines work before computers?

ELI5: how did slot machines work before computers? first mechanical slot machine machine Each spare space in tower with space in machine and lever 6 Each 100 feet of pipe line or fraction thereof Each 100 feet of mechanical first love slot How to Beat the Slot Machines! Frank Scoblete giving out huge winning Mechanical Slot Machines: The oldest slot machines run by gears, pulleys, and

first love slot They appeared on mechanical slot machines manufactured by Mills Novelty Co as early as the mid 1920s

first slot machine Mechanical Slot Machine Collectible Casino Slots · 1911 - 05 Cent - Mills Check Boy Slot Machine with Stand · 1935 Watling, Rol-A-Tops, Dual Jackpot, 05, 10,  first automatic-payout, three-reel slot machine This exhibition illustrates the technological and artistic innovations of mechanical gambling machines