Abstract: A coin comprises a core made of a first metal, an outer ring surrounding the core concentrically and made of a further metal, and a central ring between the core and outer ring fixedly connected thereto. The central ring consists of an electrically insulating material. Further, the central ring is transparent to electromagnetic waves of a first wavelength range and is less transparent or not transparent to a second wavelength range. Methods for testing the coin are also described.

Abstract: A device for dispensing coins includes a rotatingly-driven rotary disk, a coin container arranged above the rotary disk, through which coins are fed to a top side of the rotary disk, and a coin discharge. A wiper device is also includes and comprises at least one elastic wiper arm arranged above and at a distance from the top side of the rotary disk and turning with the rotary disk.

Abstract: A device for dispensing coins includes a rotatingly-driven rotary disk, a coin container arranged above the rotary disk, through which coins are fed to a top side of the rotary disk, and a coin discharge. A wiper device is also includes and comprises at least one elastic wiper arm arranged above and at a distance from the top side of the rotary disk and turning with the rotary disk.

Abstract: A coin comprises a core made of a first metal, an outer ring surrounding the core concentrically and made of a further metal, and a central ring between the core and outer ring fixedly connected thereto. The central ring consists of an electrically insulating material Further, the central ring is transparent to electromagnetic waves of a first wavelength range and is less transparent or not transparent to a second wavelength range. Methods for testing the coin are also described.

Abstract: Inductive measuring arrangement for coin validation in free-fall coin-operated devices, in which at least one elongate coil arrangement on one side of the drop path of the coins extends transversely to the drop path, two coaxial elongate coils being arranged adjacent to one another, a shell core which is E-shaped in cross section being provided, which receives the coils between its outer arms, and a central arm extending, either not at all or only partially, into the outer coil.

Abstract: Inductive measuring arrangement for coin validation in free-fall coin-operated devices, in which at least one elongate coil arrangement on one side of the drop path of the coins extends transversely to the drop path, two coaxial elongate coils being arranged adjacent to one another, a shell core which is E-shaped in cross section being provided, which receives the coils between its outer arms, and a central arm extending, either not at all or only partially, into the outer coil.

Abstract: A method for testing coins which move along a runway, using a coil assembly which, on either side of the runway, has a transmission coil C, D adapted to be admitted by a transmission signal and a reception coil A, B on a common ferrite core wherein the reception coil smaller in diameter is closer to the runway than is the transmission coil and the diameter of the transmission coil is smaller than the diameter of the smallest coin to be assumed, and wherein the ferrite core has arranged thereon a secondary coil coupled to the transmission coil the signal of which is connected, as a negative-feedback signal, to the input of a differential amplifier in such a way that the signal of the transmission coil agrees with the transmitted signal provided to the other input of the differential amplifier.

Abstract: A method for testing coins which move along a runway, using a coil assembly which, on either side of the runway, has a transmission coil C, D adapted to be admitted by a transmission signal and a reception coil A, B on a common ferrite core wherein the reception coil smaller in diameter is closer to the runway than is the transmission coil and the diameter of the transmission coil is smaller than the diameter of the smallest coin to be assumed, and wherein the ferrite core has arranged thereon a secondary coil coupled to the transmission coil the signal of which is connected, as a negative-feedback signal, to the input of a differential amplifier in such a way that the signal of the transmission coil agrees with the transmitted signal provided to the other input of the differential amplifier.

Abstract: A method for measuring the diameter of coins in coin validators, comprising the steps below: The coins traverse an electromagnetic field which is formed such as to partially hide the field, at least also by their upper area. The field is generated between at least one transmitter coil and a receiver coil. The transmitter coil is periodically acted on by a short transmission pulse the duration of which is small as compared to the time of coin passage. The maximal attenuation values are determined for different times of the transmission pulse. The attenuation values measured are extrapolated into time 0. The measured value determined by extrapolation is compared to a predetermined acceptance band or a predetermined characteristic line for coin diameters for comparison to a stored setting.

Abstract: A method for measuring the diameter of coins in coin validators, comprising the steps below:

Abstract: A coin collection apparatus for use with a coin validity testing device. The apparatus includes an electromagnetically actuated accept flap located downstream of the testing device which accept flap is pivotally supported to rotate about a horizontal axis to direct coins to a reject channel or an accept channel in response to signals delivered by the testing device. The accept flap is biased by a spring to the reject position. The apparatus further includes a first sensor located downstream of the accept flap and a second sensor located downstream of the first sensor and a processor to which the signals of the testing device and the sensors are supplied.

Abstract: A coin validator which discriminates valuable coins includes a coin path along which the coins roll. A leaf spring is fixed at one end and has a spring member which projects into the coin path at the other end when the leaf spring is in a rest position. The leaf spring oscillates when the spring member is struck by a rolling coin. An evaluation circuit produces a timing signal as a function of the elapsed time between the striking of the spring member by the rolling coin and the time when the spring member first approaches the rest position after being struck. A memory stores reference values corresponding to valuable coins and a comparator compares the timing signal to the reference values for discriminating valuable coins.

Abstract: A coin accepting apparatus. The apparatus includes a pair of generally parallel, spaced-apart plates. The plates define a coin track for receiving and guiding coins wherein each plate has a side facing the coin track and an opposing side facing away from the coin track. The apparatus further includes a sensor on the opposing side of one plate for detecting a characteristic of coins to be validated and first and second retainers on the opposing side of the plate for inhibiting movement of the sensor. The first retainer includes a spring arm for engaging the sensor and biasing the sensor against the opposing side of the plate. The second retainer engages the sensor and constrains movement of the sensor along an axis generally perpendicular to the opposing side of the plate.