US3596744A - Coin-testing apparatus - Google Patents

Coin-testing apparatus Download PDF

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Publication number
US3596744A
US3596744A US810732A US3596744DA US3596744A US 3596744 A US3596744 A US 3596744A US 810732 A US810732 A US 810732A US 3596744D A US3596744D A US 3596744DA US 3596744 A US3596744 A US 3596744A
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US
United States
Prior art keywords
coin
windings
magnetic
testing apparatus
testing
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 - Lifetime
Application number
US810732A
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English (en)
Inventor
Vladimir Yakovlevich Chesnokov
Valentin Petrovich Nikitin
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.)
Individual
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Individual
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Filing date
Publication date
Priority claimed from SU1236119A external-priority patent/SU276556A1/ru
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3596744A publication Critical patent/US3596744A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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 coin-operated vending and service-rendering machines and, more particularly, it relates to coin-testing apparatus forming part of such machines, wherein acceptability of coins is determined by the magnetic properties thereof.
  • the main testing member is an inductance coil disposed adjacent to the coin passage of the machine.
  • An inductance coil with a single winding, disposed adjacent to the coin passage, is sufficient for testing coins made of nonmagnetic metals and alloys.
  • many countries have within their coinage systems various coins made of magnetic alloys, which coins are to be distinguished from counterfeit coins and coin-imitating slugs.
  • the main object of the present invention to create a coin-testing apparatus capable of testing coins made of magnetic alloys and materials and applicable in various coin-operated machines and mechanisms for the rejection of counterfeit coins and coin-imitating slugs, be they of magnetic or of nonmagnetic materials.
  • the instant invention comprises a coin-testing apparatus of the type wherein acceptability of a coin is determined by the magnetic properties thereof in that, according to the invention, two windings are provided disposed about a coin passage one above the other at such a distance that these windings have no inductive coupling, but such that a coupling between the windings is provided in the process of passing a coin of a fellow-magnetic alloy through the space between the windings, one of the windings being connected to a source of alternating current, and the other winding being connected to a measuring circuit.
  • a coin-testing apparatus of a structure embodying the present invention is fully capable of accepting coins made of magnetic alloys and materials, at the same time rejecting counterfeit coins and slugs made of magnetic or nonmagnetic materials and alloys.
  • a coin-testing apparatus embodying the invention, comprises a coin passage 1 of a nonmagnetic material around which there are located an electric coil which includes two groups of turns or windings 2 and 3, which two windings are spaced from one another.
  • the group of turns, or winding 2 is connected to an electric supply source, which in this embodiment is a generator of alternating current having a predetermined frequency and amplitude.
  • the group of turns, or winding 3 is connected to a measur- .inductive coupling.
  • the size of the electric coil, and the frequency and amplitude of the supply current are to be determined in every practical case, in accordance with the size and magnetic properties of the coins of the coinage system effective in a particular counta.
  • the magnetic connection between the two windings 2 and 3 is established by a coin 4 being tested.
  • the coin-testing apparatus is provided with a ferromagnetic shield 5 which encompasses the two windings, protecting them from the influence of external electric and magnetic fields and also helping to increase the electromotive force (the EMF) induced in the secondary winding 3.
  • the shield 5 may be of any appropriate shape.
  • the coin-testing apparatus embodying the present invention, operates as follows.
  • a coin 4 to be tested is introduced in any known manner into the coin passage 1, and as a consequence it enters the alternating magnetic field created by the primary winding 2 and serves as a magnetic core between the primary winding 2 and the secondary winding 3.
  • the EMF induced in the secondary winding 3 is built up.
  • the value of the EMF thus induced now depends solely on the magnitude properties of the coin 4 being tested, the values of the supply current, supply frequency and supply voltage being constant, as well as the spacing between the two windings.
  • the value of the EMF in the secondary winding lies within the limits to which the measurement circuit connected to the secondary winding 3 has been adjusted, and an acceptance signal is sent in any known way by this circuit (not shown) to a function-performing mechanism of the coin-operated machine, of which the cointesting apparatus herein described forms a part.
  • a coin-testing apparatus of the type wherein acceptability of a coin is determined by the magnetic properties thereof comprising, in combination: a coin passage; two windings arranged around said coin passage one above the other with a spacing therebetween such that said windings have no inductive coupling, the magnetic connection between said windings being established as a coin of ferromagnetic alloy passes between said windings, one of said windings being connected to a source of alternating-current, and the other of said windings being connected to a measuring circuit.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Testing Of Coins (AREA)
US810732A 1968-04-27 1969-03-26 Coin-testing apparatus Expired - Lifetime US3596744A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1236119A SU276556A1 (ru) 1968-04-27 Испытатель монет

Publications (1)

Publication Number Publication Date
US3596744A true US3596744A (en) 1971-08-03

Family

ID=20442352

Family Applications (1)

Application Number Title Priority Date Filing Date
US810732A Expired - Lifetime US3596744A (en) 1968-04-27 1969-03-26 Coin-testing apparatus

Country Status (5)

Country Link
US (1) US3596744A (enrdf_load_stackoverflow)
DE (1) DE1915420A1 (enrdf_load_stackoverflow)
FR (1) FR2007541A1 (enrdf_load_stackoverflow)
GB (1) GB1265388A (enrdf_load_stackoverflow)
NL (1) NL6906203A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4182357A (en) * 1978-03-02 1980-01-08 Leonard Ornstein Method of controlling the relative humidity in a soil environment and apparatus for accomplishing same
US4448297A (en) * 1981-06-18 1984-05-15 Mendelsohn Lewis I Ferromagnetic coin validator and method
US4936435A (en) * 1988-10-11 1990-06-26 Unidynamics Corporation Coin validating apparatus and method
US5226520A (en) * 1991-05-02 1993-07-13 Parker Donald O Coin detector system
US5293980A (en) * 1992-03-05 1994-03-15 Parker Donald O Coin analyzer sensor configuration and system
US6021882A (en) * 1998-03-12 2000-02-08 Idx, Inc. Token having predetermined optical characteristics and a token validation device therefor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2045498B (en) 1979-03-30 1983-03-30 Mars Inc Coin testing apparatus
FR2591781A1 (fr) * 1985-12-13 1987-06-19 Jofemar Sa Selecteur de monnaies electronique pour machines automatiques de distribution de produits

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US790641A (en) * 1901-10-11 1905-05-23 Isidor Kitsee Coin-controlled apparatus.
US3373856A (en) * 1966-01-18 1968-03-19 Canadian Patents Dev Method and apparatus for coin selection

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US790641A (en) * 1901-10-11 1905-05-23 Isidor Kitsee Coin-controlled apparatus.
US3373856A (en) * 1966-01-18 1968-03-19 Canadian Patents Dev Method and apparatus for coin selection

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4182357A (en) * 1978-03-02 1980-01-08 Leonard Ornstein Method of controlling the relative humidity in a soil environment and apparatus for accomplishing same
US4448297A (en) * 1981-06-18 1984-05-15 Mendelsohn Lewis I Ferromagnetic coin validator and method
US4936435A (en) * 1988-10-11 1990-06-26 Unidynamics Corporation Coin validating apparatus and method
US5226520A (en) * 1991-05-02 1993-07-13 Parker Donald O Coin detector system
US5293980A (en) * 1992-03-05 1994-03-15 Parker Donald O Coin analyzer sensor configuration and system
US5439089A (en) * 1992-03-05 1995-08-08 Parker; Donald O. Coin analyzer sensor configuration and system
US6021882A (en) * 1998-03-12 2000-02-08 Idx, Inc. Token having predetermined optical characteristics and a token validation device therefor

Also Published As

Publication number Publication date
NL6906203A (enrdf_load_stackoverflow) 1969-10-29
GB1265388A (enrdf_load_stackoverflow) 1972-03-01
DE1915420A1 (de) 1969-11-13
FR2007541A1 (enrdf_load_stackoverflow) 1970-01-09

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