Slot machines include a currency detector that validates the money inserted to play. The machine pays off according to patterns of symbols visible on the front slot the machine when it stops. Modern computer technology has resulted in variations on the slot machine concept.
The “slot machine” term derives from the slots on the machine for inserting and retrieving coins. Fruit machine” comes from the traditional fruit images on the spinning reels, such as lemons and cherries. 1899 “Liberty Bell” machine, manufactured by Charles Fey. Plaque marking the location of Charles Fey’s San Francisco workshop, where he invented the three-reel slot machine. The location is a California Historical Landmark. Sittman and Pitt of Brooklyn, New York, U. 1891 which was a precursor to the modern slot machine.
It contained five drums holding a total of 50 card faces and was based on poker. Due to the vast number of possible wins with the original poker card based game, it proved practically impossible to come up with a way to make a machine capable of making an automatic payout for all possible winning combinations. Other early machines, such as the trade stimulator, gave out winnings in the form of fruit-flavoured chewing gums with pictures of the flavours as symbols on the reels. The popular cherry and melon symbols derive from this machine. The first true video slot machine was developed in 1976 in Kearny Mesa, California by the Las-Vegas based Fortune Coin Co.
Sony Trinitron color receiver for the display and logic boards for all slot machine functions. The prototype was mounted in a full size show-ready slot machine cabinet. The first American video slot machine to offer a “second screen” bonus round was Reel ‘Em In developed by WMS Industries Inc. This type of machine had appeared in Australia from at least 1994 with the “Three Bags Full” game. A row of “Wheel of Fortune” slot machines in a casino in Las Vegas. This specific slot machine is themed to the TV game show Wheel of Fortune. A person playing a slot machine can insert cash, or in ticket-in, ticket-out machines, a paper ticket with a barcode, into a designated slot on the machine.
The machine is then activated by means of a lever or button, or on newer machines, by pressing a touchscreen on its face. The object of the game is to win money from the machine. The game usually involves matching symbols, either on mechanical reels that spin and stop to reveal one or several symbols, or on simulated reels shown on a video screen. If a player matches a combination according to the rules of the game, the slot machine credits the player cash or some other sort of value, such as free spins or extra games.
Some of the most popular are the video poker machines, in which players hope to obtain a set of symbols corresponding to a winning poker hand. Multi-line slot machines have become more popular since the 1990s. These machines have more than one payline, meaning that visible symbols that are not aligned on the main horizontal may be considered for winning combinations. Reel slot machines commonly have three or five paylines, while video slot machines may have 9, 15, 25, or as many as 243 different paylines. There are also standard 3 to 5 reel electromechanical machines, of various types. These are the typical “one-armed bandits.
Since about 2005 there have been hybrid machines introduced, which combine elements of both video machines and traditional electromechanical machines. One of the main differences between video slot machines and reel machines is in the way payouts are calculated. With video machines, the fixed payout values are multiplied by the number of coins per line that is being bet. 3 coins per spin to be eligible to trigger the bonus round and possibly win the jackpot. Large denomination slot machines are usually cordoned off from the rest of the casino into a “High Limit” area, often with a separate team of attendants to cater to the needs of those who play there. In the last few years, new multi-denomination slot machines have been introduced.