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The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

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1930s coin selector

Two patent drawing sheets show a rectangular metal coin-detector housing with internal chutes, a curved magnet track, a pivoting counterweighted pallet with hooked fingers, and cross-section details of the coin passage and rejection exit mechanism.

REJECTION MEANS FOR PERFORATED COINSJames E. Olvis · September 1, 1931

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