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The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

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Anvil bounce test

Cross-sectional patent drawing of a coin-selecting mechanism showing an inclined entrance slot leading to a vertical main slot with a pivoting anvil, a curved branch slot, a spring-loaded latch, and a lower tray for rejected coins, with a second smaller cutaway view below showing the anvil assembly.

COIN-SELECTING DEVICEJoy V. Wigle and John E. Reece · March 31, 1931

United States patent drawings and specifications are works of the U.S. government and are in the public domain — they were never copyrighted. Download them, print them, frame them. Our commentary and descriptions are © 2026 The Counterfeit Coin Detector Patent Archive.

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