SE8803360L - SET AND APPARATUS FOR COIN INVESTIGATION - Google Patents

SET AND APPARATUS FOR COIN INVESTIGATION

Info

Publication number
SE8803360L
SE8803360L SE8803360A SE8803360A SE8803360L SE 8803360 L SE8803360 L SE 8803360L SE 8803360 A SE8803360 A SE 8803360A SE 8803360 A SE8803360 A SE 8803360A SE 8803360 L SE8803360 L SE 8803360L
Authority
SE
Sweden
Prior art keywords
coin
magnetic field
measuring value
specific
type
Prior art date
Application number
SE8803360A
Other languages
Swedish (sv)
Other versions
SE8803360D0 (en
Inventor
K Albrechtsen
L C Nielsen
T Ellgaard
H U Soerensen
Original Assignee
Gn Telematic As
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 Gn Telematic As filed Critical Gn Telematic As
Publication of SE8803360D0 publication Critical patent/SE8803360D0/en
Publication of SE8803360L publication Critical patent/SE8803360L/en

Links

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

Landscapes

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

Abstract

An apparatus (10) for examining a coin comprises a first oscillating magnetic field of a first frequency generated by means of a first inductor (21), and a second oscillating magnetic field of a different second frequency generated by means of a second inductor (22). The coin (15, 16) is guided past the inductors (21, 22) so as to expose the coin (15, 16) to the first and the second magnetic field. A first and a second measuring value are generated representing the degrees of interaction between the coin (15, 16) and the first and the second magnetic field, respectively, and a weighted sum of the first and the second measuring value is provided by multiplying the first and the second measuring value by a first and a second, predetermined weighting factor, respectively, which weighting factors are characteristic of a specific coin type, and further by adding the first and the second measuring value multiplied by the first and the second weighting factor, respectively. In order to determine if the coin (15, 16) is of a specific valid type, it is determined if the weighted sum is within specific limits of acceptance which are characteristic of the specific type of coin in question. By this method, it is possible to distinguish between coins which in accordance with known logic AND decision technique have previously not been distinguishable in a reliable way. <IMAGE>
SE8803360A 1987-10-19 1988-09-22 SET AND APPARATUS FOR COIN INVESTIGATION SE8803360L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK546087A DK546087A (en) 1987-10-19 1987-10-19 METHOD AND APPARATUS FOR THE EXAMINATION OF MOUNTS

Publications (2)

Publication Number Publication Date
SE8803360D0 SE8803360D0 (en) 1988-09-22
SE8803360L true SE8803360L (en) 1989-04-20

Family

ID=8142628

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8803360A SE8803360L (en) 1987-10-19 1988-09-22 SET AND APPARATUS FOR COIN INVESTIGATION

Country Status (3)

Country Link
DK (1) DK546087A (en)
GB (1) GB2211337A (en)
SE (1) SE8803360L (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2238152B (en) * 1989-10-18 1994-07-27 Mars Inc Method and apparatus for validating coins
US5404987A (en) * 1989-10-18 1995-04-11 Mars Incorporated Method and apparatus for validating money
GB2251111B (en) * 1990-09-24 1994-08-17 Roke Manor Research Acoustic coin validation
GB2253297B (en) * 1991-02-27 1994-11-16 Mars Inc Coin validation
EP0570692B1 (en) * 1992-05-22 1997-07-16 Journomat Ag Automatic coin collector
US5489014A (en) * 1994-08-03 1996-02-06 Journomat Ag Apparatus for checking coins and reading cards in an article vending machine
EP0704825B1 (en) * 1994-09-21 1997-11-26 Landis &amp; Gyr Technology Innovation AG Device for authenticating coins, tokens or other flat metal objects
GB2341263B (en) * 1998-08-14 2002-12-18 Mars Inc Method and apparatus for validating currency

Also Published As

Publication number Publication date
DK546087A (en) 1989-04-20
GB2211337A (en) 1989-06-28
GB8822205D0 (en) 1988-10-26
DK546087D0 (en) 1987-10-19
SE8803360D0 (en) 1988-09-22

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