Today, slot machines generate over 70% of all casino revenue worldwide, dominating the floors with massive screens and loud music.

Tracing the history of these machines reveals exactly how the modern gambling industry was built.

Charles Fey and the Invention of the Slot Machine

Charles Fey, a Bavarian immigrant, revolutionized gambling by creating a machine that could automatically pay out winnings in coins.

To win the ultimate jackpot of fifty cents, a player simply had to line up three Liberty Bell symbols across the single payline.

• These early machines were entirely mechanical; pulling the heavy side lever actually stretched a physical spring that spun the reels
• The physical lever is why slot machines earned the famous nickname 'One-Armed Bandits'
• Fey's original three-reel design was so perfect that it remained the absolute industry standard for over seventy years

How Technology Changed the Slot Machine Forever

Instead of physical reels, the Fortune Coin machine used a modified 19-inch Sony television to display digital, computer-generated symbols.

However, the introduction of the Random Number Generator (RNG) microchip proved that the digital games were completely fair and random.

Charles Fey's simple mechanical invention laid the foundation for a multi-billion dollar global entertainment empire.