Casinos have used gambling cheating devices for years to manipulate games of luck. These gadgets are available in many sizes and shapes, from high-tech scanners that can determine a roulette wheel’s speed to a simple magnetic device that can make a machine spin when it shouldn’t. The card holdout may be the most popular gambling device. This device allows a player remove cards from a game and keep them until they are required at a later date. Other devices have included a daub cup, which is a small container that can be used to mark cards as they are being dealt and then pinned inside a shirt sleeve for easy access.
A group of criminals known as the Piano Wire Gang used this device in Connecticut tribal casinos to cheat slot machines. The piano wires could be used to jam an internal clock that measures the rotation of the reels. This allowed the criminals manipulate the outcome. The scam was successful until the criminals got greedy and tried to cash out a $50,000 jackpot, which immediately attracted attention from security.
Another high-tech device that has been used to cheat casino games is the poker scanning camera, which was often hidden in a power bank, cuff or leather belt. This device would scan the barcode of a marked card and feed it into an analyser. The device is still available today, but it’s much less common now that more advanced technology has been developed to stop it.