US3918564A - Method and apparatus for use in an inductive sensor coin selector - Google Patents

Method and apparatus for use in an inductive sensor coin selector Download PDF

Info

Publication number
US3918564A
US3918564A US405926A US40592673A US3918564A US 3918564 A US3918564 A US 3918564A US 405926 A US405926 A US 405926A US 40592673 A US40592673 A US 40592673A US 3918564 A US3918564 A US 3918564A
Authority
US
United States
Prior art keywords
coin
value
field
signal
function
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
US405926A
Other languages
English (en)
Inventor
Fred P Heiman
Gerhard Herzog
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.)
Mars Inc
Original Assignee
Mars Inc
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 Mars Inc filed Critical Mars Inc
Application granted granted Critical
Publication of US3918564A publication Critical patent/US3918564A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

  • ABSTRACT A method and apparatus for use in an inductive sensor coin selector in which the acceptability of a coin is dependent upon a function of an examination of the output of an inductor in the absence of coins and an examination of the output of the inductor in the presence of the coin.
  • the coin or other object to be tested is caused to pass along a known path past one or more poles of an inductor on the one side of the path.
  • the method further comprises the steps of examining a characteristic of the inductor output signal in the absence of coins from the presence of the sensor, examining the same characteristic with a coin in the presence of the sensorfproducing a signal which is a function of these two examinations, and pro ducing asignal indicative of the acceptability of the coin tested.
  • the coin is caused to pass between that inductor and an electrically conductive target on the other side of the path.
  • the method of our invention tends to minimize errors resulting from shifts in value ofthe'reference standards upon which the coin examination depends, such as oscillator idling frequency, the duration of pulse counting periods and the like.
  • the method employing the step of passing the coin between the sensor and a target is particularly useful in minimizing errors caused by variations in the physical position of the sensor relative to the passageway, as in apparatus, where the sen sor is mounted on a moveable passageway sidewall.
  • Our invention also comprises the combination of ele ments of a coin selector apparatus as described below.
  • FIGS. 1 and 2 show a front schematic and a side schematic view (cutaway along line 2-2 of FIG. 1) of a portion of a coin selector apparatus according to our invention.
  • FIG. 3 is a block diagram of an embodiment of our invention.
  • FIG. 4 is a block diaagram of another embodiment of our invention.
  • coin is intended to mean genuine coins, tokens, counterfeit coins, slugs, washers, and any other item which may be used by persons in an attempt to use coinoperated devices.
  • an inductor having one or more pole pieces 22 is located on one side of a coin passageway 30.
  • the passageway is defined by two Opposite the inductor 20 embedded in or on the inner surface of the sidewall 32, on the other side of the passageway 30 from the inductor 20, is a conductive target 40 such as a thin disc of copper or other highly conductive material.
  • a conductive target 40 such as a thin disc of copper or other highly conductive material.
  • the inductor 320 is connected to an examining station circuit 350 in such a manner that the output of the station 350 is a function of material in the field of the inductor 320.
  • the output of the station 350 is modified in an amount dependent upon the relative positions of the sidewalls 332 and 334.
  • the target 340 need not be included in the apsidewalls 32 and 34, and a coin track 36 attached to" sidewall 34.
  • Sidewall 32 is fixed to the rest of the coin discriminator apparatus and sidewall 34, on which in paratus if dependence upon relative sidewall positions is not desired.
  • the output of the station 350 is applied to both switching means 362 and 364, as is a sequence of time pulses from time pulse generator 360.
  • switching means 362 is enabled by the Q output of monostable 361; causing the output of station 350 to be directed to register 37] for the duration of the time pulse.
  • Function circuit 385 produces a value which is a function of the test value which is stored in the register 371 and of the reference value which was stored in the register 370 as :representative of the output of station 350 when nocoin was present in the apparatus.
  • the comparison and memory circuit 390 contains information regarding values forfvalid coins and means for comparing such values with the values received from the function circuit 383. If the comparison and memory circuit 390 determines that such a received value is within the range for an acceptable coin, it produces a signal indicative of the fact that the coin being tested has passed the particular test. Further information about comparison and memory circuits suitable for use according to this invention may be found in an application Ser. No. 405,927 filed Oct. 12, 1973 and assigned to the assignee of this patent.
  • the reference value stored in register 370 is entered in the same manner as a test value is entered into register 371.
  • the reference value is entered into register 370 at three different times under control of the house keeping circuit 365, OR gate 366, AND gate 367 and monostable 361.
  • the housekeeping circuit 365 produces signals which are transmitted via the OR gate 366 and the AND gate 367 to trigger the monostable 361 as follows: when power is first applied to the coin selector each time a signal is received that the machine associated with the coin selector has been instructed to vend, and every one second.
  • AND gate 367 receives a signal for the duration of the period from when the coin selector first senses the presence of a coin (arrival) to the departure of the coin, which inhibits the flow of triggering signals during that period.
  • the reference value stored in register 370 will not include values influenced by the presence of a coin in the vicinity of a sensor.
  • the reference value is stored when the housekeeping circuit 365 produces signals either approximately 300 milliseconds after power is first applied to the coin selector or approximately 300 milliseconds after an acceptable signal with respect to any denomination is received from a portion of the coin selector not dependent upon the reference value (e.g. a low frequency examination), followedby the absence of a coin accept signal (i.e.: a high frequency reject).
  • the delay which may be produced by the use of a counter within the housekeeping circuitry 365 to count pulses from the time pulse generator 360, assures a sharp, relatively noise-free pulse from the monostable 361 and, in the second case, assures that the coin leaves the sytem before the new reference value is entered.
  • the reference value stored in register 370 will not include values influenced by the presence of a coin in the vicinity of a sensor.
  • the value stored in the register 371 can 1 be modified by a different mathematical function dependent upon the count stored in the register 370.
  • the presence of conductive objects in the field of the inductor 320 causes a shift in the frequency of an oscillator comprising the station 350.
  • an oscillator circuit is discussed in US. Pat. No. 3,870,137.
  • the oscillator frequency is measured by use of precise duration time pulses from the time pulse generator 360 to gate pulses to digital counters comprising the registers 370 and 371.
  • AND gates are employed for the switching means 362 and 364.
  • the reference pulse which is stored is the difference (f-fo) between the peak frequency in the presence ofa coin and the frequency in the absence of coinsf I
  • analog circuits can be used to perform at least some of the functions. For example, when the output of a coin examining station 350 which is indicative of the coin characteristic ment of the present invention.
  • the inductor 420 and oscillator 450 and coin passageway details may correspond to those of the embodiment of FlG.'3.
  • FIG. 4 is a block diagram of a digital circuit embodr 461 with a precision duration pulse via AND gate 463.
  • the flipflop 461 directs the output of the oscillator alternately to counter 470 or counter 47] for the precision pulse period, for example 1 millisecond.
  • AND gates 462 and 464 are employed to switch the oscillator output between the counters and AND gates 466 and 468 are used to define the duration of the counting periods.
  • one of the counters 470 and 471 stores a value representative of the output frequency of the oscillator 450, while the other is measuring the oscillator output signal.
  • an arrival signal is directed to AND gate 463 to inhibit that gate and stop the alternation between counters of the oscillator output signal.
  • one of the counters 470 or 471 remains connected to receive and count the oscillator output signal for the precision pulse period, while the other continues to store the last count value, stored prior to the arrival signal.
  • This stored value is representative of the idling frequency of the oscillator 450 just prior to the coinexamination which is to follow.
  • the idling frequency can be determined in the manner described for the apparatus of FIG. 3.
  • the comparison means 473 sets the flipflop 485 as soon as the pulse count of the frequency increases above the pulse count stored as representative of the idling frequency, and thereby activates AND gate 489. All of the remaining pulses from the oscillator 450 during that period are transmitted via OR gate 487 and AND gate 489 to the memory system 490 for comparison with information stored there regarding acceptable coins.
  • a reset pulse is produced on lead 479 from the pulse generating means 460. It resets flipflop 485 and appropriate elements in the memory system 490. The reset pulse is also applied to gates 476 and 478, one of which is enabled by a signal from the flipflop 461 which controls which of the counters 470 or 471 is to count in the next period, causing only that counter to be reset.
  • the arrival signal from the arrival/departure sensing means 455 ceases, AND gate 463 is no longer inhibited, and the apparatus returns to the idling frequency monitoring mode of operation.
  • a method for examining coins with respect to authenticity including the steps of producing an alternating magnetic field
  • a method for examining coins with respect to authenticity including the steps of producing an alternating magnetic field
  • values representative of the function for the coin are produced throughout the period during which the coin is subjected to the field further including the step of determining whether the coin is acceptable only if the largest of said values is within predetermined limits for acceptable coins of a given denomination.
  • values representative of the function for the coin are produced throughout the period during which the coin is sub jected to the field further including the step of determining whether the coin is acceptable only if the largest of said values is within predetermined limits for acceptable coins of a given denomination.
  • Apparatus for examining coins with respect to authenticity including i v inductor means for subjectinga coin to an alternating magnetic field, i i i means for producing a first signal having a quality .representative of the degree of interaction of the coin with the field,
  • function generator means connected to receive the first value and a second value of the first signal de' termined when the coin is in the presence of the field to produce a function of the first and second values
  • comparator means connected to receive the output of the function generator means for comparing a value representative of the function of the coin with a value representative of the function of an acceptable coin.
  • the apparatus of claim 14 further including a coin passageway having non-conductive sidewalls between which coins to be examined pass along a predetermined path and a conductive target, wherein the inductor is located on one side of the path and the target is located on the other side of the path opposite the inductor.
  • the first signal producing means is an oscillator having the inductor as a frequency determining component.
  • the apparatus of claim 14 further including a coin track along which coins to be examined are conducted through the field, a first non-conductive sidewall on one side of the track to which the inductor is mounted, a second non-conductive sidewall on the other side of the track to which a conductive target is mounted opposite the inductor, the sidewalls being relatively moveable.
  • the first signal producing means is an oscillator having the inductor as a frequency determining component.
  • Apparatus for examining coins with respect to authenticity including a coin passageway along which a coin to be examined will pass on a predetermined path,
  • an oscillator including an inductor within its frequency determining circuit which produces a first signal having a frequencyrepresentative of the degree of interaction of the magnetic field of the inductor with coins within the field

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
US405926A 1972-10-12 1973-10-12 Method and apparatus for use in an inductive sensor coin selector Expired - Lifetime US3918564A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4716472A GB1443934A (en) 1972-10-12 1972-10-12 Method and apparatus for use in an inductive sensor coin selector manufacture of carbon fibre

Publications (1)

Publication Number Publication Date
US3918564A true US3918564A (en) 1975-11-11

Family

ID=10443977

Family Applications (1)

Application Number Title Priority Date Filing Date
US405926A Expired - Lifetime US3918564A (en) 1972-10-12 1973-10-12 Method and apparatus for use in an inductive sensor coin selector

Country Status (15)

Country Link
US (1) US3918564A (sk)
JP (1) JPS5734549B2 (sk)
BE (1) BE805978A (sk)
CA (1) CA1023033A (sk)
CH (1) CH568625A5 (sk)
DE (1) DE2350989A1 (sk)
DK (1) DK153606C (sk)
FR (1) FR2203116B1 (sk)
GB (1) GB1443934A (sk)
HK (1) HK16880A (sk)
IE (1) IE38360B1 (sk)
LU (1) LU68586A1 (sk)
NL (1) NL7314058A (sk)
SE (1) SE391824B (sk)
ZA (1) ZA737877B (sk)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124111A (en) * 1975-12-02 1978-11-07 Nippon Coinco Co. Ltd. Coin inspecting apparatus
US4151904A (en) * 1977-11-14 1979-05-01 H. R. Electronics Company Coin detection device
US4323148A (en) * 1979-03-12 1982-04-06 Matsushita Electric Industrial Co., Ltd. Coin selector for vending machine
DE3208872A1 (de) * 1981-06-01 1982-12-23 UMC Industries, Inc., 63115 St. Louis, Mo. Muenzpruef- und -handhabungsvorrichtung
EP0076617A2 (en) * 1981-10-02 1983-04-13 University College Cardiff Consultants Ltd. Process and apparatus for identifying coins
US4391373A (en) * 1980-11-10 1983-07-05 Barry-Wehmiller Company Method of and apparatus for compensating signal drift during container inspection
US4460080A (en) * 1981-03-19 1984-07-17 Aeronautical & General Instruments Limited Coin validation apparatus
US4462513A (en) * 1980-02-06 1984-07-31 Mars, Inc. Testing coins
US4509633A (en) * 1983-08-24 1985-04-09 Reed Industries, Inc. Electronic coin validator with improved diameter sensing apparatus
US4582189A (en) * 1984-03-14 1986-04-15 Reed Industries, Inc. Coin validation apparatus
US4625852A (en) * 1985-09-05 1986-12-02 Coil Acceptors, Inc. Coin detection and validation means and method
US4739869A (en) * 1985-09-05 1988-04-26 Coin Acceptors, Inc. Coin detection and validation means and method
US4936435A (en) * 1988-10-11 1990-06-26 Unidynamics Corporation Coin validating apparatus and method
US5007520A (en) * 1989-06-20 1991-04-16 At&T Bell Laboratories Microprocessor-controlled apparatus adaptable to environmental changes
WO1991005318A1 (en) * 1989-10-01 1991-04-18 Jani Supplies Enterprises, Inc. Rapid coin acceptor
US5020653A (en) * 1988-03-04 1991-06-04 Sanden Corporation Device for discriminating between coins
US5131518A (en) * 1989-04-21 1992-07-21 Sanden Corporation Coin testing apparatus
US5154272A (en) * 1990-04-18 1992-10-13 Kabushiki Kaisha Nippon Conlux Controller for an automatic vending machine
US5167313A (en) * 1990-10-10 1992-12-01 Mars Incorporated Method and apparatus for improved coin, bill and other currency acceptance and slug or counterfeit rejection
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
US5293979A (en) * 1991-12-10 1994-03-15 Coin Acceptors, Inc. Coin detection and validation means
US5379875A (en) * 1992-07-17 1995-01-10 Eb Metal Industries, Inc. Coin discriminator and acceptor arrangement
US5452785A (en) * 1991-09-28 1995-09-26 Anritsu Corporation Coin diameter discriminating apparatus
US5673781A (en) * 1995-11-21 1997-10-07 Coin Acceptors, Inc. Coin detection device and associated method
US5781444A (en) * 1994-05-13 1998-07-14 Kabushiki Kaisha Nippon Conlux Distributed processing unit connectable to external processing means
US6223877B1 (en) 1996-07-29 2001-05-01 Qvex, Inc. Coin validation apparatus
US6227343B1 (en) 1999-03-30 2001-05-08 Millenium Enterprises Ltd. Dual coil coin identifier

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH580811A5 (sk) * 1975-01-14 1976-10-15 Sodeco Compteurs De Geneve
JPS592605Y2 (ja) * 1976-07-22 1984-01-24 三洋自動販売機株式会社 硬貨選別装置
JPS5386095U (sk) * 1976-12-16 1978-07-15
ES2204415T3 (es) 1997-06-18 2004-05-01 Mars Incorporated Maquina para la manipulacion de dinero.
GB2326504A (en) 1997-06-18 1998-12-23 Mars Inc Currency handling apparatus capable of predicting future cash demands
GB2326963B (en) 1997-07-02 2000-08-16 Mars Inc Method of operating a money-handling mechanism
GB2347256B (en) 1999-02-24 2002-12-31 Mars Inc Currency handling apparatus
GB2348732B (en) 1999-04-08 2003-08-06 Mars Inc Money acceptance apparatus
GB2349003B (en) 1999-04-16 2003-05-07 Mars Inc Money handling mechanism with peripheral port
GB2349496A (en) 1999-04-27 2000-11-01 Mars Inc Currency handling apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2690258A (en) * 1949-10-11 1954-09-28 Electric Sorting Machine Compa High-speed high-sensitivity sorting machine with multiplier tube
US2982389A (en) * 1957-04-04 1961-05-02 Sodeco Compteurs De Geneve Device for checking the coining of coins
US3561580A (en) * 1968-02-05 1971-02-09 Autelca Ag Coin tester having a pair of induction coils
US3741363A (en) * 1970-06-16 1973-06-26 A Hinterstocker Electronic coin testing apparatus
US3797307A (en) * 1972-01-20 1974-03-19 Little Inc A Coin discriminator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1603808C3 (de) * 1966-02-09 1975-12-04 Hilti Ag, Schaan (Liechtenstein) Pulverkraftbetriebenes Bolzensetzgerät mit einem Bolzen und einem hülsenförmigen Teil
DE2009622A1 (de) * 1970-03-02 1971-09-23 Pruemm G Elektronischer Münzprüfer
DE2012376C3 (de) * 1970-03-16 1975-04-30 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung zum Unterscheiden zwischen unterschiedlichen metallischen Gegenständen, insbesondere Münzen
DE2015115C3 (de) * 1970-03-28 1978-06-29 National Rejectors Inc. Gmbh, 2150 Buxtehude Vorrichtung zur Messung des unterschiedlichen Gehaltes an ferromagnetisehen Bestandteilen in Materialproben
GB1397083A (en) * 1971-05-24 1975-06-11 Mars Inc Coin selector utilizing inductive sensors

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2690258A (en) * 1949-10-11 1954-09-28 Electric Sorting Machine Compa High-speed high-sensitivity sorting machine with multiplier tube
US2982389A (en) * 1957-04-04 1961-05-02 Sodeco Compteurs De Geneve Device for checking the coining of coins
US3561580A (en) * 1968-02-05 1971-02-09 Autelca Ag Coin tester having a pair of induction coils
US3741363A (en) * 1970-06-16 1973-06-26 A Hinterstocker Electronic coin testing apparatus
US3797307A (en) * 1972-01-20 1974-03-19 Little Inc A Coin discriminator

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124111A (en) * 1975-12-02 1978-11-07 Nippon Coinco Co. Ltd. Coin inspecting apparatus
US4151904A (en) * 1977-11-14 1979-05-01 H. R. Electronics Company Coin detection device
US4323148A (en) * 1979-03-12 1982-04-06 Matsushita Electric Industrial Co., Ltd. Coin selector for vending machine
US4462513A (en) * 1980-02-06 1984-07-31 Mars, Inc. Testing coins
US4391373A (en) * 1980-11-10 1983-07-05 Barry-Wehmiller Company Method of and apparatus for compensating signal drift during container inspection
US4460080A (en) * 1981-03-19 1984-07-17 Aeronautical & General Instruments Limited Coin validation apparatus
DE3208872A1 (de) * 1981-06-01 1982-12-23 UMC Industries, Inc., 63115 St. Louis, Mo. Muenzpruef- und -handhabungsvorrichtung
EP0076617A3 (en) * 1981-10-02 1983-09-14 University College Cardiff Consultants Ltd. Process and apparatus for detection of electrically conducting material
EP0076617A2 (en) * 1981-10-02 1983-04-13 University College Cardiff Consultants Ltd. Process and apparatus for identifying coins
US4509633A (en) * 1983-08-24 1985-04-09 Reed Industries, Inc. Electronic coin validator with improved diameter sensing apparatus
US4582189A (en) * 1984-03-14 1986-04-15 Reed Industries, Inc. Coin validation apparatus
US4625852A (en) * 1985-09-05 1986-12-02 Coil Acceptors, Inc. Coin detection and validation means and method
US4739869A (en) * 1985-09-05 1988-04-26 Coin Acceptors, Inc. Coin detection and validation means and method
US5020653A (en) * 1988-03-04 1991-06-04 Sanden Corporation Device for discriminating between coins
US4936435A (en) * 1988-10-11 1990-06-26 Unidynamics Corporation Coin validating apparatus and method
US5131518A (en) * 1989-04-21 1992-07-21 Sanden Corporation Coin testing apparatus
US5007520A (en) * 1989-06-20 1991-04-16 At&T Bell Laboratories Microprocessor-controlled apparatus adaptable to environmental changes
WO1991005318A1 (en) * 1989-10-01 1991-04-18 Jani Supplies Enterprises, Inc. Rapid coin acceptor
US5042635A (en) * 1989-10-02 1991-08-27 Jani Supplies Enterprises, Inc. Rapid coin acceptor
US5154272A (en) * 1990-04-18 1992-10-13 Kabushiki Kaisha Nippon Conlux Controller for an automatic vending machine
US5330041A (en) * 1990-10-10 1994-07-19 Mars Incorporated Method and apparatus for improved coin, bill and other currency acceptance and slug or counterfeit rejection
US5443144A (en) * 1990-10-10 1995-08-22 Mars Incorporated Method and apparatus for improved coin, bill and other currency acceptance and slug or counterfeit rejection
US5730272A (en) * 1990-10-10 1998-03-24 Mars Incorporated Method for improved coin, bill and other currency acceptance and slug or counterfeit rejection
US5564548A (en) * 1990-10-10 1996-10-15 Mars Incorporated Method and apparatus for currency acceptance and slug or counterfeit rejection
US5167313A (en) * 1990-10-10 1992-12-01 Mars Incorporated Method and apparatus for improved coin, bill and other currency acceptance and slug or counterfeit rejection
US5452785A (en) * 1991-09-28 1995-09-26 Anritsu Corporation Coin diameter discriminating apparatus
US5458225A (en) * 1991-09-28 1995-10-17 Anritsu Corporation Coin discriminating apparatus
US5293979A (en) * 1991-12-10 1994-03-15 Coin Acceptors, Inc. Coin detection and validation means
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
US5379875A (en) * 1992-07-17 1995-01-10 Eb Metal Industries, Inc. Coin discriminator and acceptor arrangement
US5781444A (en) * 1994-05-13 1998-07-14 Kabushiki Kaisha Nippon Conlux Distributed processing unit connectable to external processing means
US5673781A (en) * 1995-11-21 1997-10-07 Coin Acceptors, Inc. Coin detection device and associated method
US6223877B1 (en) 1996-07-29 2001-05-01 Qvex, Inc. Coin validation apparatus
US6227343B1 (en) 1999-03-30 2001-05-08 Millenium Enterprises Ltd. Dual coil coin identifier

Also Published As

Publication number Publication date
IE38360L (en) 1974-04-12
BE805978A (fr) 1974-02-01
GB1443934A (en) 1976-07-28
JPS4995693A (sk) 1974-09-11
IE38360B1 (en) 1978-03-01
ZA737877B (en) 1974-09-25
HK16880A (en) 1980-04-11
DE2350989A1 (de) 1974-04-18
CH568625A5 (sk) 1975-10-31
DK153606B (da) 1988-08-01
DE2350989C2 (sk) 1987-08-06
FR2203116B1 (sk) 1976-11-19
LU68586A1 (sk) 1973-12-14
AU6135473A (en) 1975-04-17
SE391824B (sv) 1977-02-28
JPS5734549B2 (sk) 1982-07-23
CA1023033A (en) 1977-12-20
DK153606C (da) 1988-12-19
FR2203116A1 (sk) 1974-05-10
NL7314058A (sk) 1974-04-16

Similar Documents

Publication Publication Date Title
US3918564A (en) Method and apparatus for use in an inductive sensor coin selector
US4234071A (en) Device for checking metal pieces, particularly coins
US3797307A (en) Coin discriminator
US3921003A (en) Apparatus for identifying coins
US3739895A (en) Method and apparatus for testing coins employing dimensional categorizing means
US3870137A (en) Method and apparatus for coin selection utilizing inductive sensors
US4254857A (en) Detection device
US4538719A (en) Electronic coin acceptor
US3966034A (en) Phase sensitive coin discrimination method and apparatus
US5067604A (en) Self teaching coin discriminator
US3373856A (en) Method and apparatus for coin selection
US3952851A (en) Coin selection method and apparatus
US3797628A (en) Device and method for testing coins employing velocity determining means
US3738469A (en) Tester for different types of coins
US3980168A (en) Method and apparatus for authenticating and identifying coins
US4151904A (en) Coin detection device
JPH09509771A (ja) 硬貨を識別する方法及びその装置
US4178502A (en) Arrangement for counting coins of different diameters
US3391388A (en) Detection apparatus
JP4111350B2 (ja) コインの妥当性をチェックするための方法および装置
JPS5911154B2 (ja) コイン検査装置
US3962627A (en) Electronic apparatus for testing moving coins employing successive time significant sensings of the effects of proximity of a coin under test to inductive impedance elements upon the effective impedances thereof
WO1986006246A2 (en) Coin detection device
CA2184147C (en) Coin detection device and associated method
GB1272560A (en) Coin selector for determining the authenticity and denomination of coins