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EP0072655B1 - Dispositif de rejet de pièces de monnaie - Google Patents

Dispositif de rejet de pièces de monnaie Download PDF

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Publication number
EP0072655B1
EP0072655B1 EP19820304182 EP82304182A EP0072655B1 EP 0072655 B1 EP0072655 B1 EP 0072655B1 EP 19820304182 EP19820304182 EP 19820304182 EP 82304182 A EP82304182 A EP 82304182A EP 0072655 B1 EP0072655 B1 EP 0072655B1
Authority
EP
European Patent Office
Prior art keywords
coin
approach
legal
impedance
oscillator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19820304182
Other languages
German (de)
English (en)
Other versions
EP0072655A2 (fr
EP0072655A3 (en
Inventor
Makoto Tomozawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Seiko Co Ltd
Original Assignee
Asahi Seiko Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Seiko Co Ltd filed Critical Asahi Seiko Co Ltd
Publication of EP0072655A2 publication Critical patent/EP0072655A2/fr
Publication of EP0072655A3 publication Critical patent/EP0072655A3/en
Application granted granted Critical
Publication of EP0072655B1 publication Critical patent/EP0072655B1/fr
Expired legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to a coin rejector device of a type utilizing proximity switches.
  • Such a coin rejector device utilizing proximity switches is disclosed in a Japanese Patent Application Publication No. 16,527/1971.
  • the coin rejector device disclosed in the above Publication includes two proximity switches having detector coils in the form of generator or oscillator coils, respectively, each of which ceases its oscillation when the load impedance becomes lower than a predetermined value upon the approach of a coin to the detector coil and in which the oscillator of one of the proximity switches is preset to such an oscillation frequency that the load impedance upon the approach of the legal or acceptable coin to the detector coil becomes higher than any load impedance upon the approach of at least one of the illegal or unacceptable coins while the oscillator of the other proximity switch is preset to such an oscillation frequency that the load impedance upon the approach of the legal coin to the detector coil becomes lower than the load impedance upon the approach of other illegal coins except the above at least one illegal coin.
  • such a known coin rejector device has a disadvantage that it can not select the legal coin from an illegal coin modified by drilling a small hole or holes therethrough so as to provide the same load impedance as that by the legal coin. For example if an illegal brass coin has a small hole drilled therethrough, it provides the same impedance as that of the legal one-hundred yen nickel coin when the illegal brass coin approaches to the detector coil so that it could not prevent unfair use of such modified illegal coins.
  • the object of the invention is to provide a coin rejector device employing two or more proximity switches having detector coils in the form of generator or oscillator coils, respectively, each of which generates an output when the load impedance becomes lower than a threshold value upon the approach of a coin to the detector coil and in which each of the threshold values is preset to an impedance which is higher than that provided upon the approach of the legal coin to the detector coil for improving the coin selecting precision and preventing the unfair use of illegal coin having a hole.
  • Fig. 1 there is shown a coin detecting portion of the coin rejector device utilizing two proximity switches. It will be seen that detector coils 1 and 2 in the form of generator or oscillator coils, respectively, are fixedly arranged along a coin selecting passage 3 so that when a coin 4 inserted into the coin rejector device passes through the passage 3 in the direction as shown by an arrow, the impedance of each of the detector coils 1 and 2 is varied.
  • Fig. 2 there are shown impedance performance curves by illegal coins having the same diameter and thickness as that of the legal nickel coin and made of stainless steel (Su), iron (Fe), nickel silver (Ns), lead (Pb), and brass (Bs), while the impedance (Z) on the approach of the legal nickel coin to the detector is 1.
  • the oscillation frequency (f) of the detector coil without the approach of the coin is indicated on the abscissa axis and the impedance (Z) upon the approach of the coin to the detector preset at the oscillation frequency (f) is indicated on the ordinate axis.
  • the proximity switch S 1 when the impedance by the approach of the coin to the detector coil 1 is lower than the threshold value Z i , the proximity switch S 1 has an output which is transmitted to an AND circuit through a delay circuit D 1 . At this time, the legal nickel coin and the illegal coins made of brass, nickel silver and lead are detected.
  • the proximity switch S 2 When the impedance by the approach of the coin to the second detector coil 2 is lower than the threshold value Z 2 , the proximity switch S 2 has then an output which is also transmitted to the AND circuit through a delay circuit D 2 . At this time, the legal nickel coin and the illegal coins made of iron and stainless steel are detected. Accordingly, the AND circuit has an output only when the inserted coin is the legal nickel coin.
  • the coin rejector device including two or more proximity switches each of which has an output when the impedance on the approach of the coin to the detector coil is lower than the threshold value and the threshold values being higher than the impedance on the approach of the legal coin to the detector coils so that it is possible to make a large difference between the impedance by the legal coin and the threshold value as shown in Fig. 2 and thus to prevent the coin selecting precision from affecting by any change of the impedance caused from the change of conditions on the approach of the coin to the detector coil and hence the position of the coil relative to the detector coil and further prevent the unfair use of illegal coin with a hole.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)

Claims (2)

1. Dispositif de rejet de pièces de monnaie comportant des premier et second commutateurs de proximité (Si, S2), chacun desquels ayant une bobine de détection sous forme d'une bobine oscillatrice et produisant une sortie quand l'impédance produite lors de l'approche d'une pièce de monnaie de la bobine de détection devient inférieure à des première et seconde valeurs de seuil (Z1, Z2) de celle-ci, lesdits commutateurs de proximité étant préréglés à des première et seconde fréquences (fi, f2) d'oscillation prédéterminées, des moyens pour analyser les signaux de sortie des commutateurs de proximité (S1, S2) sous forme d'un test d'acceptabilité des pièces de monnaie, les sorties desdits premier et second commutateurs de proximité (S1, S2) étant reliées à une porte ET de sorte qu'une sortie est produite à partir de la porte ET seulement quand la pièce est légale ou acceptable, caractérisé en ce que l'oscillateur du premier commutateur de proximité (Si) est préréglé à un fréquence d'oscillation (fi) telle que l'impédance produite lors de l'approche de la pièce légale ou acceptable et l'impédance produite lors de l'approche d'une pièce non acceptable d'au moins un premier type devient inférieure à ladite première valeur de seuil (Z1) tandis que l'oscillateur du second commutateur de proximité (S2) est préréglé à une fréquence d'oscillation (f2) telle que l'impédance produite lors de l'approche de la pièce légale ou acceptable et l'impédance produite lors de l'approche de pièces inacceptables autres que celles dudit premier type devient inférieure à ladite seconde valeur de seuil (Z2).
2. Dispositif selon la revendication 1, dans lequel ladite pièce de monnaie légale ou acceptable est une pièce en nickel.
EP19820304182 1981-08-10 1982-08-09 Dispositif de rejet de pièces de monnaie Expired EP0072655B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP117667/81U 1981-08-10
JP11766781U JPS5824870U (ja) 1981-08-10 1981-08-10 硬貨選別装置

Publications (3)

Publication Number Publication Date
EP0072655A2 EP0072655A2 (fr) 1983-02-23
EP0072655A3 EP0072655A3 (en) 1983-12-07
EP0072655B1 true EP0072655B1 (fr) 1986-06-04

Family

ID=14717297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820304182 Expired EP0072655B1 (fr) 1981-08-10 1982-08-09 Dispositif de rejet de pièces de monnaie

Country Status (5)

Country Link
EP (1) EP0072655B1 (fr)
JP (1) JPS5824870U (fr)
AU (1) AU536534B2 (fr)
DE (1) DE3271552D1 (fr)
HK (1) HK28787A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07120453B2 (ja) * 1989-02-17 1995-12-20 富士電機株式会社 電子式硬貨選別装置の硬貨返却信号発生装置
GB2266804B (en) * 1992-05-06 1996-03-27 Mars Inc Coin validator
JP6175241B2 (ja) * 2013-01-31 2017-08-02 日本電産サンキョー株式会社 コイン状被検出体識別装置およびコイン状被検出体識別装置の制御方法
WO2014119193A1 (fr) * 2013-01-31 2014-08-07 日本電産サンキョー株式会社 Dispositif d'identification d'objet à détecter en forme de pièce de monnaie et procédé de commande d'un dispositif d'identification d'objet à détecter en forme de pièce de monnaie

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1283263A (fr) * 1960-12-20 1962-02-02 Signaux Entr Electriques Sélecteur de jetons
US3373856A (en) * 1966-01-18 1968-03-19 Canadian Patents Dev Method and apparatus for coin selection
JPS443281Y1 (fr) * 1966-07-19 1969-02-06
US3870137A (en) * 1972-02-23 1975-03-11 Little Inc A Method and apparatus for coin selection utilizing inductive sensors
JPS4927278U (fr) * 1972-06-07 1974-03-08
DE2915719A1 (de) * 1979-04-19 1980-11-13 Pruemm Georg Elektronischer muenzpruefer
GB2068621B (en) * 1980-02-06 1983-12-14 Mars Inc Testing coins
GB9010526D0 (en) * 1990-05-10 1990-07-04 Unilever Plc Cosmetic composition

Also Published As

Publication number Publication date
AU536534B2 (en) 1984-05-10
JPS5824870U (ja) 1983-02-17
HK28787A (en) 1987-04-16
EP0072655A2 (fr) 1983-02-23
DE3271552D1 (en) 1986-07-10
AU8670882A (en) 1983-04-14
EP0072655A3 (en) 1983-12-07

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