Part III: Slot Machine Cheating · Physical Cheating Methods · #5.5
Coin Rake
How it works
A historical cheating device used to trick early slot machines. The coin rake was a metal tool inserted into the coin pathway to manipulate the coin mechanism. The rake could push coins backward or forward in the coin escalator, causing the machine to miscount or re-register credits. Slot manufacturers began installing zigzag coin pathways to defeat stringers and coin rakes.
Where it appears
Early mechanical slot machines with straight coin pathways.
On the record
George Joseph’s slot cheating training presentation describes the coin rake as an old device used to trick certain slot machines.
Detection & preventionADVISORY
The paid halfHow a monitoring room catches coin rake, 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.