It is why these types of slots are called one-armed bandits. The Operator Bell has a lever for players to pull and spin the reels. It included horseshoes, diamonds, spades, hearts, and bells. It featured symbols on each reel rather than on playing cards. This new design had three reels instead of five drums. In 1895, Charles Fey from San Francisco developed an improved version of the Liberty Bell, which he named the Operator Bell. It proved popular among players and soon spread across the United States. This early slot machine version was called the Liberty Bell due to its bell-shaped top piece. In 1891, a New York-based company called Sittman and Pitt developed the first mechanical slot machine with five drums containing 50 playing cards. The origin of traditional slot machines was traced back to the late 19th century. Types Of Bonus Round And Free Spin Games:.History of Bonus Round and Free Spin Games.A Comprehensive Guide To Types of Slots.
