The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Coin sorter

Patent drawing showing a mechanical coin-counting apparatus with paired vertical guide channels, a central tilting balance plate, adjustable counterweights on threaded arms, and swinging vanes directing coins to separate receptacles, shown in top view and two cross-sectional views.IMPROVEMENT IN COIN-COUNTERSAron Bernstein · October 31, 1876Patent drawing showing a rectangular cabinet divided into rows of labeled coin-detector cases (A) with inlet slots (a) for coin denominations, feeding into a series of adjacent boxes (D), plus a cross-sectional view revealing an internal tilting poise mechanism (B) inside a detector case.IMPROVEMENT IN COUNTERFEIT-COIN DETECTER AND COIN-RECEIVER.Samuel A. Field · May 14, 1878Patent drawing showing a tall cylindrical vending-machine casing with an internal zigzag coin race suspended on a spring and shaft, alongside detail views of the zigzag race sections, a plan view of the rotating coin chute, and a side elevation of an alternative lever-and-weight support mechanism.MACHINE FOR THE ASSORTMENT OF COINS.Henry C. Hart · October 20, 1891Patent drawing showing the interior of a vending machine casing with a coin slot, an inclined chute leading to a pivoted dumping table with a hooked gripper arm, and separate accepting and rejecting chutes below, along with detail views of the gripper and shedder mechanism.COIN-SORTING MECHANISMCharles E. Dellenbarger · June 30, 1908Cutaway front elevation of a mechanical fare box showing a stack of coin selector slides, ejector bars, springs, and a crank-driven operating head mounted on an internal partition, with a coin hopper wheel at lower left.COIN-ASSORTING MECHANISM FOR FARE BOXESFrank G. Murray · June 25, 1929Patent drawing of a mechanical coin tester showing a sloped coin deposit chute feeding a spring-supported runway with vertical guides, adjustable pivot blocks, and switch fingers that divert coins of improper weight into a separate reject conduit.COIN TESTING DEVICEClifton W. Nixon · September 1, 1931Patent drawing showing a coil assembly with windings, a coin-receiving panel with sliding pins, and a detailed vacuum tube relay circuit diagram with multiple coils, resistors, and relay contacts labeled with reference numbers.COIN CONTROLLED OSCILLATOR FOR RELAY OPERATIONAlexander M. Gordon · April 29, 1952