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History of Slots

Slots are among the most widely used forms of gambling on the planet. In most casinos in Las Vegas for instance, slot machines constitute around 70% of the total income. Progressive-jackpot prizes alone including cars and million dollar prizes also means they are one of the greatest attractions for patrons at the casinos.

When Were Slot Machines Invented?

The first slot machine game was invented in 1887 by Charles Fey in Bay area, California. Like many inventions, it was created as a way of creating a gambling machine for poker which was capable of making automatic payouts. Because machine poker at that time contained an endless list of hands (e.g. full house, flush, two pair, straight) it was impossible to produce automatic payouts.

In 1887 however, Fey invented an up to date machine that was much more simplistic in design. Rather than pay out money for every hand that a patron was dealt, it used 3 spinning reels each with 5 symbols to ensure that when specific symbols aligned around the pay line the jackpot was paid. The tranquility of in addition to the higher prizes of slot machines built them into increasingly popular in the US and beyond.

The very first slot gambling machine that Fey invented, known as the "Liberty Bell", paid out 10 nickels when players won three liberty bells consecutively. This was the top prize on the machine.

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Because the classic 3-reel games became popular, other manufacturers began creating their own versions.In 1907, Herbert Mils in Chicago produced one called "Operator Bell". Many of these were soon install in saloons, bars, bowling alleys and stores across the US. In 1891, Sittman and Pitt produced a slot machine game which contained 5 drums having a total of fifty card faces. It was according to poker (i.e. slot poker) and similarly proved extremely popular.

Modern Day Slot Machines

The biggest problem with old fashioned, mechanised slots was that the payouts were limited due to how easily the prizes might be one. On the classic 3-reel machine with 10 symbols on each reel, for example, the odds of winning the top prize was 1/1000. This strictly limited the jackpot prize given that they could be won all too often by players.

This issue was overcome in 1963 however when the first fully electromechanical machine called "Money Honey" was made. In the future, the machines could include "weighted symbols" and special microprocessors which limited how often winning symbols would align on the pay line. This reduced the probability of winning pay lines and allowed the vendors and casinos to massively boost the jackpots while increasing their profits.