Abstract: In a conventional coin sorting device, sensor abnormalities tend to be overlooked as the reference value used to determine whether a coin introduced is good or bad is set by the introduction of a coin with the reference characteristics during an adjustment. In the present invention, a representative value common to a plurality of coin sorting devices of a similar type is used as the reference value. From the detection value and reference value of a coin that has been introduced into the coin sorting device, the constants of a linear regression formula related to both values are obtained and set during an adjustment.

Abstract: A coin refund signal generator includes a coin sorting sensing circuit which is normally in a quiescent state but which generates a sensing signal of a first duration in response to the deposit of a genuine coin and of a second duration in response to the actuation of a coin return requesting device. A detection circuit determines the duration of the sensing signal and generates a coin refund signal if the duration of the sensing signal equals or exceeds the second duration.

Abstract: A coin sorter has an AC bridge circuit including at least one bridge arm having a detecting coil disposed along a coin passage to detect a plurality of coin denominations. A reactance element, such as a fixed coil or capacitor, is connected in a second arm of the bridge, and a plurality of resistors connected in series are provided in a third arm of the bridge for obtaining fractions of the voltage developed across said third arm in response to the passage of different coins. Differential amplifiers receive the voltages from different taps between the resistors and compare these voltages with a voltage proportional to the voltage across the reactance element. The outputs of the differential amplifiers provide an indication of the coin denomination.

Abstract: A coin sorter for examining the genuineness of plural coin denominations and for sorting the coins has an AC bridge circuit which produces bridge output signals corresponding to different denominations of coins, a time-sharing signal generation circuit in the form of a microcomputer, for producing time-sharing signals, a switching circuit for time-multiplexing the bridge output signals in sequence to one output lead in response to the time-sharing signals, and a single amplifier and comparator which receives the sequentially provided bridge output signals, amplifies and compares them to reference signals, and provides an indication of the coin denomination.

Abstract: The specification discloses a coin-sorting device capable of distinguishing between an acceptable specie and an unacceptable slug. The device includes an impedance coil, positioned adjacent the coin passage and incorporated into a bridge circuit, and a decision unit reponsive to the bridge circuit for detecting the passage of a coin and determining whether the coin is a specie or a slug. The signal received from the bridge circuit is compared by a checkup circuit with two reference values to improve the reliability of the device.

Abstract: In a coin sorting machine of the type wherein a sorting coil for detecting the characteristics of a coin inserted into the machine is provided along a coin passage and the output signal of the coil is varied to thereby determine whether the inserted coin is true or false when the coin passes by the sorting coil, a coin sorting period is determined by detecting the position of the inserted coin rolling along the coin passage, and the inserted coin is sorted depending on whether or not a predetermined sorting signal is outputted during the coin sorting period.

Abstract: Erroneous counting of both false coins and real coins tied to a string is prevented by providing a two stage counter with a gate in the middle. The first stage determines whether the coin is real and, if real, what its value is. If the coin is real a gate is opened and the coin passes a detector which shuts the gate while simultaneously counting the coin value from the first stage.

Abstract: The jamming or misdistributing of coins inserted into a coin sorting machine in quick succession is prevented by providing detectors upstream of the coin distributing member and returning the coins if a secondly inserted coin passes the first detector before the first coin passes the second detector.