The Development of Online Slots: A Thorough Examination The history of slot machines, which dates back to the late 19th century, is an intriguing story of inventiparimatch slotson and change. The Liberty Bell, the first mechanical slot machine, was created in 1895 by Charles Fey. This straightforward gadget had three revolving reels with diamonds, horseshoes, and the famous Liberty Bell as symbols. Coins would be inserted, a lever would be pulled, & players would hope for a winning combination.