Field guide
Ball Tripping (Roulette)
How it works
A method of prematurely dislodging the roulette ball from its track so that it settles into a desired section of the wheelhead. Can be executed by cheaters or dishonest casinos. On a restored late-1920s Chicago table, hidden buttons drove a small pin into the ball track. The pin could deflect the ball toward a section that favored the house. Dealers can also use hidden levers under table edges.
On the record
A restored late-1920s Chicago roulette table from the Prohibition years had a hidden pin that could deflect the ball.
Detection & preventionADVISORY
The paid halfHow a monitoring room catches ball tripping (roulette), and what stops it recurring, written for the desk, not the reader.
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Published as a detection reference for surveillance, compliance and gaming-operations professionals. Thresholds and tuning are set by the property. Nothing here is instruction: the method is described so it can be recognised.