US3561580A - Coin tester having a pair of induction coils - Google Patents

Coin tester having a pair of induction coils Download PDF

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Publication number
US3561580A
US3561580A US795608*A US3561580DA US3561580A US 3561580 A US3561580 A US 3561580A US 3561580D A US3561580D A US 3561580DA US 3561580 A US3561580 A US 3561580A
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US
United States
Prior art keywords
coin
oscillators
output
track
self
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
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US795608*A
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English (en)
Inventor
Mario Meloni
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.)
Autelca AG
Original Assignee
Autelca AG
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
Priority claimed from CH167768A external-priority patent/CH486080A/de
Application filed by Autelca AG filed Critical Autelca AG
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Publication of US3561580A publication Critical patent/US3561580A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • a coin tester comprises a pair of oscillators respectively connected to a pair of self-induction coils with a coin track extending through the fields of the coils, the oscillators being connected in a logic circuit so that the oscillation of one of the oscillators temporarily ceases when an acceptable coin passesalong the coin track and the oscillations of both temporarily cease or are uninterrupted when another object passes along the coin track.
  • a coin tester in particular for automatic vending machines and coin operated telephones, the coin track of which for the metal objects in coin form to be tested, extends through the field of at least one self-induction coil which is part of the oscillating circuit of an oscillator so con structed that its oscillations temporarily cease or not cease due to the effect of a metal object passing through the coin track depending on the electrical and magnetic properties of said metal object, acceptance or nonacceptance of the metal object depending on whether the oscillations cease.
  • the coin track successively extends through the fields of at least one pair of self-induction coils which are respectively connected to a pair of oscillators and the oscillators are so constructed that the effect of an acceptable coin passing through the coin track causes temporary cessation of the oscillations of only one of the oscillators while the effect of another object passing through the coin track causes temporary cessation of the oscillation of both oscillators or the continuance of both oscillator oscillations.
  • one of the oscillators can be so constructed that the effect of an acceptable coin is just sufficient to cause interruption of its oscillations and the other oscillator can be so constructed that the effect of an acceptable coin is not sufficient to temporarily interrupt its oscillations.
  • the coin track 2 formed in a body I extends through the field of aself-induction coil 3 and with a core 4 thereafter through the field of a self-induction coil 23 having a core 24.
  • the coil 3 is part of the oscillator circuit consisting of the circuit 20 which comprises an oscillator and a rectifier following thereon.
  • the coil 23 is part of the oscillator circuit of a circuit 25 comprising an oscillator and a rectifier for rectifying the oscillations of said oscillator. If the oscillations of the oscillator of circuit 20 or 25 respectively cease temporarily, the rectifier of the aforementioned circuit will supply a pulse to conductor A or to conductor C respectively.
  • the feedback of each of the two oscillators is so adjusted that an acceptable coin passing through the coin track 2 is just sufficient to cause the oscillations of the oscillator of circuit 20 to cease temporarily but insufiicient to also cause the oscillations of the oscillator of circuit 25 to cease.
  • a logic circuit 26 to 31 supplies at its output F a coin acceptance pulse only if a pulse which occurs on conductor A is not followed by any pulse on conductor C within a predetermined time.
  • This predetermined time is longer than the time required by an object 2a in coin form which drops through the coin track 2 in order to pass successively through the fields of both self-induction coils 3 and 23 and its is shorter than the interval of time during which successively inserted objects in coin form traverse through the coin track. If none of the rectifiers of the circuits 20 and 25 supply a pulse or if both rectifiers supply pulses within the aforementioned period of time, no coin acceptance signal willoccur at the output F of the logic circuit.
  • the logic circuit comprises an OR gate 26, a multivibrator 27, a univibrator 28, a differential circuit 29, an inverter 30 and an AND gate 31.
  • the multivibrator 27 is associated with resetting means 32 to reset the aforementioned multivibrator after each operation and after delay period has elapsed since operation, said delay period being longer than the period of time which an object dropping through the coin track requires for traversing the fields of both coils 3 and 23 and shorter than the time interval in which successively inserted objects in coin form traverse through the coin track.
  • the time constant of the univibrator 28 is subject to the same condition with the exception that the aforementioned time constant is shorter than the above-mentioned delay period of the resetting means 32.
  • the multivibrator 27 and the univibrator 28 are together supplied with the output pulse of the OR gate 26 to whose inputs one each of the conductors A and C extend.
  • the univibrator 28 is followed in succession by the differential circuit 29 and the inverter 30 whose output E extends to one of the inputs of the AND gate 31.
  • the other input of the AND gate 31 is connected to the output of the multivibrator 27 which carries a voltage after the multivibrator is operated from its quiescent state.
  • the output of the OR gate 31 is the output F of the logic circuit.
  • the differential circuit 29 supplies a pulse of opposite polarity which is inverted in the inverter 30 and thereupon has a polarity suitable for rendering the AND gate 31 conductive. Since the delay period of the resetting means 32 is longer than the time constant of the univibrator 28, the output voltage of the multivibrator 27 will still be effective at the AND gate 31 if the aforementioned pulse which was inverted in the inverter 30 reaches the AND gate 31 so that said pulse renders said AND gate 31 conductive and a coin acceptance pulse occurs at the output F.
  • an object not acceptable as an acceptable coin and traversing through the coin track 2
  • the multivibrator 27 will be operated twice in succession so that it does not supply any voltage to the AND gate 31 if at the end of the pulse supplied by the univibrator 28 the pulse inverted in the inverter 30 reaches the AND gate 31 so that no coin acceptance signal occurs at the output F.
  • the resetting means 32 will return the multivibrator into its initial state. The coin tester is then ready for testing the next object which drops through the coin track.
  • the coin tester described hereinabove to be'yprovided for each coin denomination with one system of the kind heretofore described with reference to the coin, the coil pairs of the individual systems being disposed successively along the coin track and the logic circuit of each system supplying a coin acceptance signal onlyif an acceptable coin of the corresponding denomination traverses the coin track.
  • Each coin acceptance signal may set a branch inorder to guide the object whichhas traversed through the coin track either into a track for acceptable coins or into a track for other objects. It is however also'possible for all objects inserted for operation of an automatic vending machine or coin operated telephone to be guided into one container and for all objects to be encashed incommon or ,to be rejected in common depending on the result of the test.
  • a coin tester comprising at least one pair of self-induction coils, a pair of oscillators respectively connected to said self-induction coils, means defining a cointrack extending through the fields of said self-induction coils, and means for causing the oscillation of only one of said'oscillators to temporarily cease in response to passage of an acceptable coin along said coin track and for causing the oscillations of both of said oscillators to temporarily cease or for causing the oscillations of both of-said oscillators to be uninterrupted in response to passage of another object alongsaid coin track.
  • logic circuit within a predetermined time which is at least equalto the time required by an object, to pass through.said;coin;track fortraversing the fields-0f saidself-induction coils and'is, smaller than the time interval between successively inserted coins.
  • a coin tester as claimed inclaim 2; whereinsaid logic circuit comprises aunivibrator a time constant within the limits of said time, a multivibrator, means for! resettingsaidmultivibrator, after operation thereof, with adelay which is .also within said time limits but whichiexceeds the time constant'of said univibrator, differentialcircuit means for differentiating the output voltage of said'univibrator', an inverter'for. the output voltageof said differential circuit means, and an-AND gate, said AND gate having two inputs, and one ofsa'id outputs being connectedto the output of saidmultivibrator and: the
  • a coin tester as claimedin claim 3 further comprising an OR gate, means for connecting-each of thc two inputs of said OR gate tothe output of one of. said rectifiers, and means forconnecting the output of i the 0K to the input of. said multivibrator and of said univibraton 5.
  • a coin tester as c'laimedinpclaimlgwherein'one pairof said self-induction coils and of said oscillators is provided foreach of'aplurality of coin-denominations, pairs vof self-inductor coils being disposed. at a distance fromeach other along saidcoin track.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
US795608*A 1968-02-05 1969-01-31 Coin tester having a pair of induction coils Expired - Lifetime US3561580A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH167768A CH486080A (de) 1967-01-20 1968-02-05 Münzprüfer

Publications (1)

Publication Number Publication Date
US3561580A true US3561580A (en) 1971-02-09

Family

ID=4216007

Family Applications (1)

Application Number Title Priority Date Filing Date
US795608*A Expired - Lifetime US3561580A (en) 1968-02-05 1969-01-31 Coin tester having a pair of induction coils

Country Status (8)

Country Link
US (1) US3561580A (US06371994-20020416-C00029.png)
BE (1) BE727665A (US06371994-20020416-C00029.png)
DE (1) DE1902806C3 (US06371994-20020416-C00029.png)
ES (1) ES362937A2 (US06371994-20020416-C00029.png)
FR (1) FR2001312A6 (US06371994-20020416-C00029.png)
GB (1) GB1262152A (US06371994-20020416-C00029.png)
NL (1) NL161903C (US06371994-20020416-C00029.png)
SE (1) SE361373B (US06371994-20020416-C00029.png)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3653481A (en) * 1967-07-17 1972-04-04 Mars Inc Electrical/electronic coin or token indentification system
US3682286A (en) * 1969-07-19 1972-08-08 Georg Prumm Method for electronically checking coins
US3918564A (en) * 1972-10-12 1975-11-11 Mars Inc Method and apparatus for use in an inductive sensor coin selector
US3918565A (en) * 1972-10-12 1975-11-11 Mars Inc Method and apparatus for coin selection utilizing a programmable memory
US3966034A (en) * 1972-10-12 1976-06-29 Mars, Inc. Phase sensitive coin discrimination method and apparatus
US3977508A (en) * 1974-06-19 1976-08-31 Compagnie Generale D'automatisme Device for recognizing a category of coins
US4936435A (en) * 1988-10-11 1990-06-26 Unidynamics Corporation Coin validating apparatus and method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA956859A (en) * 1970-11-23 1974-10-29 Guy L. Fougere Coin selector
US3739895A (en) * 1971-08-16 1973-06-19 G Fougere Method and apparatus for testing coins employing dimensional categorizing means
DE2930994A1 (de) * 1979-07-31 1981-02-26 Diethard Schejbal Verfahren zum reinigen von schmieroder/und treibstoffen in fahrzeugen, insbesondere kraftfahrzeugen
GB2233805B (en) * 1989-07-07 1993-02-10 Mars Inc Coin testing apparatus
GB2253932A (en) * 1991-03-20 1992-09-23 Coin Technology Co Ltd Coin detector device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059749A (en) * 1959-12-16 1962-10-23 Paradynamics Inc Coin testing apparatus
US3317016A (en) * 1965-05-21 1967-05-02 Int Nickel Co Coin selecting device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059749A (en) * 1959-12-16 1962-10-23 Paradynamics Inc Coin testing apparatus
US3317016A (en) * 1965-05-21 1967-05-02 Int Nickel Co Coin selecting device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3653481A (en) * 1967-07-17 1972-04-04 Mars Inc Electrical/electronic coin or token indentification system
US3682286A (en) * 1969-07-19 1972-08-08 Georg Prumm Method for electronically checking coins
US3918564A (en) * 1972-10-12 1975-11-11 Mars Inc Method and apparatus for use in an inductive sensor coin selector
US3918565A (en) * 1972-10-12 1975-11-11 Mars Inc Method and apparatus for coin selection utilizing a programmable memory
US3966034A (en) * 1972-10-12 1976-06-29 Mars, Inc. Phase sensitive coin discrimination method and apparatus
US3977508A (en) * 1974-06-19 1976-08-31 Compagnie Generale D'automatisme Device for recognizing a category of coins
US4936435A (en) * 1988-10-11 1990-06-26 Unidynamics Corporation Coin validating apparatus and method

Also Published As

Publication number Publication date
BE727665A (US06371994-20020416-C00029.png) 1969-07-01
NL6901510A (US06371994-20020416-C00029.png) 1969-08-07
SE361373B (US06371994-20020416-C00029.png) 1973-10-29
NL161903C (nl) 1980-03-17
DE1902806B2 (de) 1978-10-19
ES362937A2 (es) 1970-12-01
DE1902806A1 (de) 1970-09-17
NL161903B (nl) 1979-10-15
GB1262152A (en) 1972-02-02
FR2001312A6 (US06371994-20020416-C00029.png) 1969-09-26
DE1902806C3 (de) 1979-06-13

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