US3738469A - Tester for different types of coins - Google Patents

Tester for different types of coins Download PDF

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US3738469A
US3738469A US00064157A US3738469DA US3738469A US 3738469 A US3738469 A US 3738469A US 00064157 A US00064157 A US 00064157A US 3738469D A US3738469D A US 3738469DA US 3738469 A US3738469 A US 3738469A
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coin
coins
measuring
checking
different types
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US00064157A
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G Prumm
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Priority claimed from DE19691947238 external-priority patent/DE1947238A1/de
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D5/00—Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
    • G07D5/08—Testing the magnetic or electric properties
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D5/00—Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
    • G07D5/02—Testing the dimensions, e.g. thickness, diameter; Testing the deformation

Definitions

  • the invention further teaches the UNITED STATES PATENTS possibility of performing a still further damping mea- 2 773 579 12/l956 Lu 194/102 X surement to obtain additional information about the ES 3,086,536 4/1963 Klopp 133/8 R dfferem from Sam first type mformanon 3,144,112 8/1964 Powers et a1. 194/99 7 Claims, 29 Drawing Figures PAIENIEB 3.738.469
  • the present invention relates to a new and improved method for checking coins moving along at least one guide channel of a coin checking apparatus, and further pertains to a new and improved coin checking apparatus for carrying out the aforesaid inventive method.
  • damping-measuring techniques Apart from these mechanical techniques there have also become known to the art electronic techniques for checking coins, so called damping-measuring techniques. All of these so-called damping-measuring techniques manifest themselves by virtue of their relatively low price and extremely practical measurement results.
  • the decisive drawback of this coin checking method resides in the fact that they can be even more easily fooled by counterfeit coins than the mechanically operating equipment. This can be explained when it is realized that for all damping measuring techniques, as a practical matter only one composite value can be measured, resulting from the sum of those parameters of the coin which influence the measuring operation, such as material, thickness, diameter.
  • the composite value of a coin such as for instance the German one-mark piece, stamped from a metallic alloy possessing only average electrical dampening qualities, can be very easily obtained by a smaller and thinner coin formed of a more pronounced damping metal, copper for instance.
  • a primary objective of the present invention is to provide just such improved coin checking technique and equipment therefor which overcomes the aforementioned disadvantages of the prior art and which capably fulfils this need.
  • Another, more specific object of the present invention relates to an improved method for checking coins which, on the one hand, insures for sufficiently positive checking results and, on the other hand, permits undertaking the coin checking operation in an economical, feasible and reliable fashion.
  • Still a further significant objective of this invention relates to an improved coin checking technique and equipment therefor which is extremely reliable in operation, has great versatility insofar as it is readily capable of checking coins of different denominations and types with utmost integrity, and effectively safeguards against the improper use of false or counterfeit coins or coin types.
  • each coin to be checked is subjected to a damping measurement, and by means of at least a second measurement opera tion there is determined either the diameter and/or the thickness and/or the existence of a central bore and/or the embossing of the coins, or by means of a second damping measurement operation, which however functions according to a different viewpoint, there is once more derived a composite measurement value based upon other parameters.
  • an apparatus determines the geometric criteria of a coin, and thereafter frees a current path at which only the correct damping value derived with respect to the determined geometric criteria generates a signal which can then be further conducted for the evaluation process.
  • a signal can only appear if, for instance, the first mechanism has responded such as to indicate that the measured coin possesses the size of, for instance, a German l-mark piece, and if the subsequent, second measuring location has determined by means of a damping measurement that the coin to be checked has provided just that damping measurement value which corresponds to a German l-mark piece. In such case it is assumed that the checked coin was a true German l-mark piece.
  • any possibility of achieving a deceptive intent through use of larger or smaller coins has been thwarted. Indeed, for instance, it is possible to achieve with a small copper coin the damping value of a German l-mark piece. Yet, in such case the evaluation of such ostensibly correct damping value will be suppressed, because the previously connected arrangement for the determination of the diameter has ascertained that the coin does not possess the correct diameter dimension of a l-mark piece. The diameter checking mechanism would more likely have freed the current path which has corresponded to the diameter of a smaller coin and the therewith associated damping value.
  • the method can be carried out in different ways. For instance, it is possible to utilize mechanical contacts and toderive the force necessary for their actuation from manual manipulations which are available during insertion of the coin into the coin slot.
  • the method aspects of the invention can furthermore be manifested by the features that the evaluation of the measurement signal can occur in a digital or analogue fashion.
  • the evaluation process it is possible to undertake the evaluation process, through appropriate application of the measuring head and the design of the circuitry, by means of a so-called sequential circuit or also by means of a so-called selective pair-circuit.”
  • the invention proposes the use of an optional measurement arrangement in order to safeguard the damping measurement operation and such then determines whether the coins to be checked are provided at their surfaces with recesses.
  • a common characteristic of such measurement arrangements is, likewise according to the inventive aspects, that they store their Yes/Noresponse which is then evaluated upon the completion of the travel of the coin through a measurement path.
  • FIG. I is a fragmentary longitudinal sectional view taken through a coin checking mechanism for a coin type in which the contact testing for the diameter of the coin is arranged directly at the coin infeed slot at the front plate of the coin checking device; 7
  • FIG. 2 is a fragmentary longitudinal sectional view through a single-type coin checking device wherein the relevant contact is arranged in the channel for the travelling coins and therefore is protected against being tampered with;
  • FIG. 3 is a fragmentary longitudinal sectional view through a single-type checking device in which the relevant contact is arranged in the same manner as in FIG. 2 above, however possesses such a long contact lever portion that the range of pivoting of such contact lever falls within the measuring arrangement for the damping measurement;
  • FIG. 4 schematically illustrates the rear face of a coin checking apparatus for four different coins, in which four separate coin infeed slots for each coin type open into a common checking channel;
  • FIGS. 5 to 9 illustrate multiple-type coin checking equipment utilizing a common coin infeed slot for all coin sizes and types which are to be checked, and specifically wherein,
  • FIG. 5 schematically depicts the rear face of a coin infeed slot having mounted thereat a slide member and four contact arrangements corresponding to the four different size coins to be deposited
  • FIG. 6 is a fragmentary longitudinal sectional view through a coin checking channel for four different size coins in which four testing or scanning elements for the individual size coins are arranged after one another, to provide the so-called sequential circuit,
  • FIG. 7 is a fragmentary longitudinal sectional view through a coin checking channel in which four measuring probes are arranged for determing the coin diameter and a further measuring probe is arranged for determing the existence of a bore or hole at the coin in a particular manner, and defining the so-called selective pair-circuit",
  • FIG. 8 is a cross-sectional view through a motordriven conveying or feed disc arrangement for the coins with the associated slide member for the determination of the diameter of the coins and for pressing the coins so as to assume a specific measuring position, and
  • FIG. 9 schematically illustrates a motor-driven conveying disc forthe coins which is constructed in stepwise fashion according to the principle of the caliper gauge, and wherein an entrained sliding contact bridges signal conductors as a function of the diameter of the entrained coins, these signal conductors evaluating the diameters of the associated damping measurement values;
  • FIGS. 10 to 23 inclusive illustrate different possible arrangements for the measuring probes and provide appropriate clarifying explanations with respect thereof;
  • FIGS. 24 to 26 illustrate respective block circuit diagrams according to which a coin signal can be delivered to a plurality of voltage discriminators (so-called threshold value circuits);
  • FIGS. 27 to 29 illustrate respective block circuit diagrams by means of which the signals of a number of coins can be delivered to a single threshold value circuit for evaluation.
  • FIGS. 1 to 3 each embody a front plate member 10 provided thereat with the coin infeed slot 11 and a coin channel 14 formed of the base member 12 and the cover member 13. Within each coin channel 14 there has been shown a respective throughpassing coin 15 traveling in the direction of a measuring probe 16 arranged within the associated coin channel 14.
  • the aforedescribed structure will be understood to be common to all three embodiments of coin checking devices depicted in FIGS. 1, 2 and 3 respectively.
  • a microswitch 17 is arranged behind a protective cover plate 18.
  • Microswitch 17 is directly attached to the front plate 10 in such a way that its actuation plunger 19 extends slightly into the area of the coin infeed slot 11 as shown.
  • the actuationplunger 19 of the microswitch 17 must be actuated if such coin possesses a predetermined minimum size. Coins possessing too small dimension will not be able to actuate the plunger 19 of the microswitch 17, and therefore will not be able to close the current path for the evaluation of a signal delivered by the measuring probe 16.
  • Coins which possess a sufficient size to actuate the microswitch 17 are only insignificantly smaller than the correct coins intended to be collected and for which the coin infeed slot 11 has been exactly designed. Coins possessing too large a size can, indeed, under circumstances actuate the plunger 19 of the microswitch 17, but because of their oversize cannot be inserted into the coin chute or channel 14. It is here mentioned that placing of a current path into a preparatory state by means of the microswitch 17 can, according to a further concept of the invention, only be maintained for a momentary or temporary adjustable period of time.
  • Actuation of the microswitch 20 can only then be undertaken by a coin possessing a sufficiently large size, and this operation is a prerequisite for the transmission of a possibly correct measurement response signal emanating from the measuring probe
  • This bridging effect can be easily achieved, for instance, through the provision of a self-holding relay which can again be deenergized by a suitable command delivered from the measuring probe 16 or else such can be undertaken by means of an adjustable timing element.
  • the coin checking mechanism is designed in accordance with the teachings of FIG. 3.
  • the microswitch 20 is equipped with a feeler lever 22 which is so long that it extends into the operable region of the measuring probe 16.
  • this FIG. 3 has depicted the coin in coincidence with the measuring probe 16, in other words such coin has exactly reached the point of time at which the measuring probe 16 delivers a measurement response signal.
  • the microswitch 20 has already been activated for a certain period of time and will further remain activated for an additional period of timeafter the measuring probe 16 has delivered its measurement result.
  • a further common feature of the various embodiments of coin checking devices depicted in FIGS. 1 to 3 resides in the fact that the installation is continuously furnished with power or current.
  • the microswitch also for the switching-in and switching-out of the current supply network.
  • the microswitch 20- is advantageously constructed as a double-pole switch and undertakes, apart from switching the current path, also the switching of the voltage supply network.
  • FIG. 4 illustrates the rear face of a coin checking apparatus for four different coins.
  • Measuring probes 32 and 33 are arranged at both sides of this coin checking chute 31.
  • the coin infeed slots 23, 24, 25 and 26 are designed in respect of the diameter and thickness of the permissable coins.
  • the actuation plungers of respective microswitches 34, 35, 36 and 37 extend slightly into the upper region of the corresponding coin infeed slots 23, 24, 25 and 26.
  • the amount with which the plungers extend into the corresponding coin infeed slots is determined in accordance with the permissable switching play of the plungers and'in accordance with the deviations of the diameter of the coins towards their lower limit. What has been described with regard to the operation of the arrangement of FIG. I is equally applicable for the operation of this switching arrangement. Furthermore, a switching'mechanism 38 is associated with Y the coin infeed slot 24, switching mechanism 38 possessing a plunger which scans the thickness of the inserted coins. Thus, when the switch mechanism 38 is not placed into operation, which would be the case if the deposited coins are too thin, then it prevents the evaluation of a signal derived from the measurement apparatus. Finally, it is here mentioned that as far as the arrangement of the microswitches are concerned, the same observations made with respect to FIG. 1 are equally applicable here.
  • FIG. 5 illustrates the rear side or face of a coin infeed slot for coins of different diameter.
  • reference numeral 10 serves to designate the base or front plate whereas reference numeral 11 designates the coin infeed slot which, insofar as its dimensions are concerned, has been cut or otherwise designed with respect to the largest size coin and the thickest coin of the prescribed classification of four different coins.
  • a substantially T-shaped slide member 39 possessing at its upper surface four stepped portions which correspond to the diameter differences of the relevant coin classification, moves in guide members 40 and 41 and is retained in its starting position by a pair of spring members 42 and 43.
  • the front plate has again been designated by reference character 10 and the coin infeed slot formed thereat by reference character 11.
  • the coin chute or channel 14 for the coins 15 is bounded by the lower wall member or base 12 and the upper wall member or cover 13.
  • a measuring probe 16 for performing a damping measurement operation, as for instance described in my copending U.S. Patent Application, Ser. No. 55,752 filed July 17, 1970, now U.S. Pat. No. 3,682,286, and entitled Method for Electronically Checking Coins.
  • the coin infeed slot 11 and the measuring probe 16 there are arranged four further measuring probes 48, 49, 50 and 51, spaced at various distances, as shown, from the base 12 of the coin chute or channel 14.
  • the measuring probes 48-51 represent, for instance, inductive feelers, which then assume a switched state if coins pass thereby at a certain minimum spacing.
  • the arrangement of such feelers 48, 49 50 and 51 is undertaken in such a manner that initially the switch for the largest coin is first arranged, and then in the following sequence the switches for the remaining smaller coins, providing what has been conveniently termed herein a so-called sequential-circuit arrangement".
  • the switch means cannot only be used for the determination of either the diameter of the coins or only the thickness thereof, but furthermore, it is possible to employ such switch means to advantage to also determine both the diameter and thickness of the coins.
  • probe members at the side of the channel facing away from the side against which the coins travel.
  • FIG. 7 illustrates the arrangement of a coin checking device utilizing light barrier means for determining the diameter of the coins as well as for determining the presence of bores or apertures at the coins.
  • the same reference characters have been conveniently employed here to designate the corresponding components of the coin chute or channel which were used during the discussion of the arrangement of FIG. 6.
  • a light barrier means 52 which can only be actuated by the largest coin of the coin classification.
  • reference characters 53, 54 and 55, 56 and 57, 58 represent, by way of example, pairs of light barrier means which can be used with particular advantage for the determination of the diameter of the coins, because they render superfluous extensive logical coupling. More specifically, then, each coin is associated with a pair of light barrier means, with the exception of the largest size coin with which there is only associated a single light barrier means 52.
  • the light barrier means 54, 56 and 58 of each pair, closest to the bottom 12 of the coin chute 14, serves to energize a current path provided for the corresponding diameter of the coin being checked, whereas the light barrier means 53, 55 and 57 of each pair, and facing away from the bottom or base 12 of the chute means 14, serves to remove the preparatory switched state of each such current path.
  • the exemplary embodiment of coin checking device depicted in FIG. 7 depicts the situation where the coin 15, because of its diameter, has just energized the light barrier means 56, but has not been able to remove this switching signal because its size is not sufficient to switch the light barrier means 55.
  • the conductors of the light barrier means 52 and light barrier means 54 are not placed into a preparatory state because these light barrier means have not been actuated. The same considerations are therefore also applicable with regard to the light barrier pair 58/57.
  • the coin 15 has thus, once again, only placed into a preparatory state one of four pulse conductors, there thus being provided a so-called selective pair-circuit arrangement".
  • a further light barrier means is designated at reference character 59. It serves to determine the presence of holes or bores at the coins.
  • This light barrier means 59 is mounted at such a spacing from the base or bottom 12 of the coin traveling channel 14, that, in all probability, both holes of the smallest as well as the largest coins will fall into its operating zone. It is mentioned that at this location small holes are relatively insignificant for the outwitting of the described coin checking device. Furthermore, it is here stated that what will be described hereinafter with regard to a single light barrier means can be analogously attained if there are successively coupled two or three light barrier means in the event that a larger zone is to be monitored.
  • the invention likewise contemplates that'the light barrier means 59 actuates a switch which enables the evaluation of a so-called correct"- signal. Actuation of the switch, according to the invention, should only then be possible if the light barrier means 59 has received a pulse. Such actuation should be extinguished in the event that instead of receiving one pulse, it receives two pulses. In order to achieve this switching function, the invention contemplates utilizing to particular advantage a bistable multivibrator (flip-flop).
  • FIG. 8 illustrates a modified version of coin checking device incorporating a base or front plate member 60 at which there has been machined a substantially circular-shaped recess, denoted by the line 61.
  • the depth of the recess 61 corresponds approximately to the thickness of a coin.
  • This circular-shaped recess 61 merges at its lower region with a shaft or chute member 62 which forks into the branched portions 63 and 64.
  • Reference numerals 65 and 66 designate both positions which can be assumed by a directional switch means for proper and improper coins.
  • a coin infeed channel 67a is formed between the channel walls 67 and 68 at approximately the same height as the circular-shaped recess 61.
  • Reference character 69 designates a projection which extends into the circular-shaped recess 61
  • reference numeral 70 denotes a conveying disc member for coins which is equipped with a notch 71.
  • this notch 71 is situated opposite the coin infeed channel 67a bounded by the walls 67 and 68.
  • the depth of the notch 71 defined by the circular arcs 72 and 73, corresponds to the diameter of the smallest coin of a coin classification or sort.
  • the spacing between the circular arc 72 and the peripheral portion of the circular-shaped recess 61 corresponds to the diameter of the largest acceptable coin. It is here also mentioned that the coin infeed channel 67a between the walls 67 and 68 is likewise cut or designed to receive such largest acceptable coin size.
  • an inverted, substantially T-shaped slide member which moves against the force of a spring 77 between the supports 75 and 76.
  • a protruding arm member 78 of the slide member 74 depending upon the position of such slide member, actuates one or the other of the contacts 79, 80, 81 and 82 as a function of the diameter of the coin which has moved such slide member 74.
  • a coin of optional diameter is placed through the coin infeed slot 67a and arrives at the zone of the notch 71.
  • a nonillustrated motor serves to thereafter drive the conveying disc member 70 through one complete rotation and then such conveying disc member 70 is again brought to rest.
  • Excitation of the drive motor can be undertaken by means of a non-illustrated switch arranged at the region of the coin infeed slot 67a.
  • the conveying disc for the coins moving in counter-clockwise direction, serves to forwardly advance, by means of its edge portion 83, the inserted coin until such coin comes into coincidence with the measuring probe 16 and generates a signal.
  • the coin within the notch 71 will now drop into the chute 62, and by virtue of the corresponding desired positioning of the switching lever, either into the full line position at 65 or the phantom line position at 66, such coin will be either collected because it is a correct coin or it will be rejected because it is a false or improper coin.
  • the mechanics of actuating the directional lever 65/66 has not been explained in greater detail hereinafter since, such does not constitute a material aspect of the invention and furthermore any suitable actuation mechanism capable of selectively bringing such lever into one or the other of the illustrated positions can be readily employed.
  • the substantially T-shaped slide member 77 further simultaneously ensures that the coin will be brought into a definite position with respect to the measuring probe 16.
  • FIG. 9 illustrates a modified version of coin checking equipment in which there is provided a base or front plate 84.
  • a substantially circular-shaped recess following the line indicated by reference character 85, is provided at such base plate 84.
  • Circularshaped recess 85 merges at its lower end with a channel 86 and at an inclination towards its upper end with a coin infeed channel 87 receiving the coins which are to be checked.
  • a disc member 88 rotates within the circular-shaped recess 85, disc member 88 being provided with projections 89, 90 and 91 in the manner of a caliper gauge.
  • the corresponding stepped portions of the projections 89, 90 and 91 are accommodated to the diameter of the coins which are to be accepted.
  • this disc member 88 is equipped with a tongue-like extension or projection member 92 which follows the circular are of such disc member.
  • reference character 16 designates a measuring probe arranged at theapex of the circular path of travel of the disc member 88
  • reference numeral 93 indicates a coin which has been inserted.
  • a non-illustrated switch member arranged at the region of the infeed channel 87, causes the disc member 88 to undertake one complete revolution through the agency of a nonillustrated motor, and upon completion of such revolution, this disc member is again brought to standstill.
  • the sliding contact 94 having an elastic spring 95 likewise moves because it is secured to the disc member 88.
  • measuring'probe l6 delivers a suitable signal.
  • the sliding contact arrangement 94 has moved through a similar displacement path, and now will be located above the pair of contacts 98 and 99.
  • multiple-type coin checking device especially when utilizing the principle of signal storage.
  • the heretofore known single-type coin checking devices could be, in principle, arranged in a row adjacent to one another and in this manner it was possible to form a multiple-type coin checking device.
  • Such construction of multiple-type coin checking device would be manifested by the features of a plurality of coin infeed slots and a plurality of coin travelling channels for the coins to be checked, and furthermore would likewise be manifested by a like number of complete checking circuits for evaluation.
  • the invention proposes the provision of preferably a plurality of parallelly extending coin channels for the coins in front of a single measuring probe, or if there is undertaken a special design of such measuring probe arranging a plurality of such parallel extending channels to pass between the legs of a substantially U-shaped measuring probe or between the oppositely situated probes of a pair of measuring probes.
  • the measurement operation it is possible for the measurement operation to utilize a measuring probe which is constructed such that at its one end face there is arranged an oscillating circuit.
  • This oscillating circuit owing to the magnetic lines of force emanating therefrom can be dampened by coins which move past the end face of the measuring probe.
  • Such preferably inductively operating end-face feelers are already known to the art for other measuring purposes.
  • the field of the lines of force is operable over a predetermined area in front of the end face of the measuring probe.
  • the measuring probe can be acceptably designed such that the field of the lines of force of such measuring probe monitor up to three coin channels.
  • an additional concept of the invention contemplates that in such instance, the different coins are arranged within the individual coin channels in accordance with the ascending or descending gradient of their dampening capability and are then moved past the measuring probes, all as will be explained more fully hereinafter. Depending upon the desired measuring technique one would proceed in different ways.
  • a measuring probe which consists of two oppositely situated com ponents.
  • a further advantage of this inventive arrangement is realized in that by displacing the measurement arrangement in the direction of the floor of a coin channel or in the direction of the upper boundary wall of a coin channel, it is possible to vary the momentary relationship of the center of the measuring arrangement to the center of different size coins, and thereby considerably influence the signal magnitude.
  • the central coincidence of the measuring arrangement and the coin is optimal in a certain way. This is to be under-stood in that with this arrangement,
  • the properties or characteristics of the material of the coin play a particularly decisive role as far as the measurement result is concerned. Apart from such, but in a relatively small percentage, there is measured the thickness, the diameter and the depth of embossment of the coins.
  • the measuring operation is undertaken such that approximately the largest size coin of a coin sort or classification reaches by means of its upper edge, during throughpassage, at least the center of the measuring probe, whereas the smallest and slightest dampening coin of a coin type classification will just still influence the measuring probe.
  • the magnitude of influencing the individual components is reversed and now the coin material and diameter determine approximately onehalf of the entire measurement result.
  • the pair of measuring probes it is possible to construct the pair of measuring probes to possess a substantially U-shaped configuration.
  • two rod-like ferrite core members are connected by a third U-shaped rod member, with a respective separate winding being provided at both legs of the U-shaped construction.
  • the one winding provides a transmitter winding and the second winding the receiver winding.
  • the U-shaped construction of measuring probe simultaneously affords both advantages which have to be obtained with the previously described arrangement of a pair of measuring probes possessing two different geometric arrangements with respect to the coin channel.
  • the U-shaped construction of the measuring coil simultaneously permits the determination of the coin-typical material characteristics as well as the measurement of the diameter of the coin.
  • the invention also proposes especially economically feasible and simple solutions for the evaluation circuit to be described hereinafter. It is here mentioned that with damping measurements of any type, the coins bring about varying dampening of an oscillating circuit or an idling amplitude, and that these different cointypical damping voltages must be filtered out of a voltage peak by means of suitable threshold valuedeterminingv means. By way of completeness, it is here mentioned that the principles of operation of such a threshold value measurement for the determination of the so-called coin-typical or coin-characteristic signals during a damping measurement hasbeen explained in considerable detail in my aforementioned co-pending U.S; application, Ser. No. 55,752, filed July 17, 1970, now US. Pat. No. 3,682,286.
  • the sequential circuit arrangement consists of a flip-flop, a timing stage, an amplifier for the obtained signals and an electrical actuation mechanism for a coin collecting device.
  • the invention proposes constructing a singletype coin checking device and to avoid the expense of utilizing a number of complete adjacently arranged single-type coin checking devices during the checking of a number of coins in that, the signal obtained by the measuring probe is amplified and delivered to a plurality of threshold value detectors.
  • Each such threshold ing device for a plurality of coins possesses the advantage that it is possible to adjust each individual threshold value detector to a window width by means of a suitable series resistor, this window width" taking into account the deviations of the measurement result which may occur for a certain coin type.
  • FIG. 10 illustrates a possible manner of arranging a measuring probe at a coin checking device of the invention.
  • the base or floor of a measuring device as well as the boundary walls 114, 115, 116 and 117 for the three coin channels 111, 112 and 113.
  • a measuring probe 118 At the wall 114 of the measuring channel 111, there is mounted a measuring probe 118.
  • a coin 119 is located within the channel 111, a coin 120 within the channel 112 and a further coin 121 within the channel 113.
  • FIGS. 11 and 12 there have been illustrated a number of curves which, starting from a so-called noload or idling amplitude 122, illustrate the different dampening effects of this no-load amplitude brought about by the coins.
  • the three curves 123, 124 and 125 represented in FIG. 11 illustrate the dampening measurement result which would appear if all three coins of FIG. 10 are conducted through the channel 111. Since the coins and 121 possess a greater dampening characteristic or quality than the coin 119, for the same spacing of such coins to the end face of the measuring probe 118, there results a greater dampening value curve, the apex of which is represented by the lines 127 and 128, respectively, in contrast to the line 126 of the lesser dampening coin 119. i

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US00064157A 1969-08-22 1970-08-17 Tester for different types of coins Expired - Lifetime US3738469A (en)

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DE1942822 1969-08-22
DE19691947238 DE1947238A1 (de) 1969-09-18 1969-09-18 Elektronischer Mehrsorten-Muenzpruefer

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FR (1) FR2059093A5 (enrdf_load_stackoverflow)
GB (1) GB1327820A (enrdf_load_stackoverflow)

Cited By (15)

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US3939954A (en) * 1974-03-18 1976-02-24 Qonaar Corporation Check receiving and testing apparatus
US4089400A (en) * 1976-01-23 1978-05-16 Gregory Jr Lester Coin testing device
EP0058094A1 (en) * 1981-02-11 1982-08-18 Mars Incorporated Improvements in and relating to apparatus for checking the validity of coins
US4371073A (en) * 1979-08-08 1983-02-01 Autelca Ag Coin checker for coins of varying diameter
US4474281A (en) * 1982-06-07 1984-10-02 General Signal Corporation Apparatus and method for coin diameter computation
US4556140A (en) * 1982-08-06 1985-12-03 Kabushiki Kaisha Universal Method and apparatus for discriminating coins or bank notes
US4705154A (en) * 1985-05-17 1987-11-10 Matsushita Electric Industrial Co. Ltd. Coin selection apparatus
US4815579A (en) * 1986-05-14 1989-03-28 Autelca Ag. Testing device for coins of different dimensions and different electro-magnetic properties
US4870360A (en) * 1981-10-02 1989-09-26 University College Cardiff Consulatants Limited Apparatus for identifying an electrically conducting material
US4936435A (en) * 1988-10-11 1990-06-26 Unidynamics Corporation Coin validating apparatus and method
US5244070A (en) * 1992-03-04 1993-09-14 Duncan Industries Parking Control Systems Corp. Dual coil coin sensing apparatus
US5273151A (en) * 1992-03-23 1993-12-28 Duncan Industries Parking Control Systems Corp. Resonant coil coin detection apparatus
US6053300A (en) * 1995-07-14 2000-04-25 Coins Controls Ltd. Apparatus and method for determining the validity of a coin
US6227343B1 (en) 1999-03-30 2001-05-08 Millenium Enterprises Ltd. Dual coil coin identifier
CN106920324A (zh) * 2017-03-09 2017-07-04 深圳怡化电脑股份有限公司 传动装置、钞门结构及自动存取款机

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GB2176038B (en) * 1985-05-31 1989-04-12 Cubic Western Data Coin discriminator
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US4089400A (en) * 1976-01-23 1978-05-16 Gregory Jr Lester Coin testing device
US4371073A (en) * 1979-08-08 1983-02-01 Autelca Ag Coin checker for coins of varying diameter
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US4601380A (en) * 1981-02-11 1986-07-22 Mars Incorporated Apparatus for checking the validity of coins
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US6467604B1 (en) 1995-07-14 2002-10-22 Coin Controls, Ltd. Apparatus and method for determining the validity of a coin
US6227343B1 (en) 1999-03-30 2001-05-08 Millenium Enterprises Ltd. Dual coil coin identifier
CN106920324A (zh) * 2017-03-09 2017-07-04 深圳怡化电脑股份有限公司 传动装置、钞门结构及自动存取款机

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FR2059093A5 (enrdf_load_stackoverflow) 1971-05-28
GB1327820A (en) 1973-08-22

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