Surely when Charles Fey built the first slot machine in 1896 could never have imagined how this strange machine would develop and what impact would have. In fact for one hundred years this little machine has only changed a little, only in appearance. The casing, which consisted of a metal box around the basic mechanism, became more fancy and impressive in order to attract attention.
Basically slot machines had always the same operating principle: the player supplies the machine with coins and pulls the lever. The machine rotates randomly and the effect of a retarding mechanism stops the rotation after a while. Each cylinder is painted with some fancy symbols that when forming a uniform pattern (printed somewhere on the machine) the player wins or loses accordingly.
Although Fey is considered the father of slots (Slot Machines), original machines had appeared years ago. Fey however had the idea to convert them into gambling machines. These early “entertainment devices” were placed initially in a saloon and were not exposed to the eyes of the “good society” and the owners were operating them within the limits of the law.
These first machines had a big disadvantage. They were designed so that after the entry of a certain number of coins and due to the coins weight, a door was opened and some of the coins were thrown out of the machine for the lucky winner. But did not take long for people to realize that the coins could be thrown out with a little push out and shaking the machine right and left.
So some capable designers were hired to build a metal bar to prevent the throwing of coins after shaking or “tilting,” the machine. Also, they built machines that could be placed on the bench of a store or secured to a wall.
Meanwhile similar types of machines began to make their appearance in big department stores or even in groceries, neighborhood shops, etc. even from the most conservative owners. They were called “trade simulators” (market simulators), and worked as the Modern slot machines, except that the winners had to receive their profits as goods from the store. It was perhaps the forerunner of the current vouchers.
Winning in slots depends on a simple mechanism that consists of symbols (usually fruits, hearts, and perhaps bars, diamonds, and of course swords and sticks - the initial choice of Fey) glued to three cylinders and a rotating lever. The ten symbols on each reel machine allow thousands of combinations.

