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.

The Mechanical Era: The Birth of the Liberty Bell

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

Fey’s brilliant design used three physical metal reels painted with symbols like horseshoes, diamonds, spades, and a cracked Liberty Bell.

• 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

The Transition to Video Slots and RNG

The entire industry changed in 1976 when a Las Vegas company called Fortune Coin introduced the very first video slot machine.

In the late 1990s, the internet boom allowed these advanced video games to transition seamlessly into the first online casinos.

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