With the advent and popularization of the Internet, 3-reel slot machines have gone digital, opening a new era in gambling. That was a device based on RNG (random number generator), the same mechanism that determines the outcome of spins in modern slots.

It lingered for about 30 more years and then was replaced by the first electronic slot machine built by the Fortune Coin Company.

This pretty simple system dominated the market until 1934 when the first animated horse race machine called Paces Races was designed. The first slots were mechanical slots with three metal hoops (reels) inside a cast iron hull and a level that spun the reels. The contemporaries of Operator Bell witnessed lots of updates of slot machines until the latter went digital, but none of them was lucky enough to play free 3-reel slots, the privilege we have now. In the early 1930s, cast-iron machines were replaced by analogs with wooden cabinets, but that’s not as much important as the very fact that 3-reel slots have gone mainstream for the years to come. One more machine appeared – Operator Bell by Herbert Mills – and then more, and more analogs popped up in casinos so that every gambling fan could choose the one up the taste. The invention of Mills Liberty Bell – the main competitor of Liberty Bell at the time – opened an age of competition between slot machine manufacturers and by 1910 slot machines could be found in abundance in gambling halls. It hasn’t taken long until slot machines became popular. Both free 3-reel slots and real-money slots are only a few clicks away – just pick the best casino with 3 reel slots online and launch the machine you like to feel an old-school gambling style that prevailed in the gambling industry dozens of years ago.

And – as surprising as it might sound – three-reel slots have survived the competition with their more advanced successors and can be played today at almost any online casino. There are tons of video and 3D slots available to players of all tastes at online casinos, but it has all started with 3-reel mechanical slots, the first of which was the Liberty Bell invented in 1895 by Charles Frey, a car mechanic from San Francisco. Load More 3-Reel Slots Were the First to Come

3 reels or 5 reel slot machines