DE3310057A1 - Electronic coin tester with a device to prevent fraudulent manipulations - Google Patents

Abstract

An electronic coin tester which is constructed such that coins found to be good by the testing electronics cannot be passed several times through the coin path with fraudulent intent. This happens by a stop lever which is connected to a microswitch and which blocks the coin path in a timed manner or clamps a coin, e.g. one attached to a thread, when it is pulled back into the coin path.

Description

Hamburg, March 20th, 1983

The invention relates to one in the Oberheariff of the main claim described coin validator. Such a coin validator is explained and shown in DE-OS 31 29 646, for example.

With such coin validators, despite careful - ■ elaborate electronic fraudulent manipulations - as described below and are also shown - cannot be ruled out with absolute certainty.

The underlying task of the invention is that even under the most unfavorable Conditions, especially in the case of manipulation attempts, i.e. fraudulent intent, the blocking the transfer of electrical or electronic output signals to a memory module, the list and storage of these signals or the

Processes
Enable internal \ in the machine itself serves to prevent. Intentions of fraud are, in particular, the string game as well as the kicking or flipping of coins via the coin return path.

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The attempt to manipulate by means of thread play is made with the help of Coins that correspond to the geometrical and physical properties of the coin to be tested. On the edge of this type of coin a small hole is drilled, which is preferably used to attach a Perlon or Nylon thread is used. This is thrown into the electronic coin validator and hanging on the thread Coin is checked and tested in the measuring coil or coils according to the criteria set considered good. The electronic logic circuitry controls in conjunction with electromagnetically controlled acceptance flap puts the coin in the acceptance channel and guides it to the microswitch responsible for the impulse or to a light chain arrangement. Due to the actuation of the switch lever or switch wire of the microswitch through the weight of the coin causes the impulse to be emitted into the electrical or electronic Switching arrangement of the machine.

The impulses are emitted via the "Normal Open" contact of the microswitch. In this NO-Schaltstellui so after the first impulse has been emitted, the inserted coin will be the one on the thread hangs, stopped in this position. By taking back the coin with the help of the latter attached thread into the acceptance channel of the coin validator, and by slackening the thread up to actuate the microswitch again until the ImDUIs release, this thread play repeated continuously to get "good" signals to save without having to re-supply coins to the Münzorüfer. Similar qilt for the measuring coil. Here the coin hanging on the thread is turned back and forth in the yo-yo method moved, "good" pulses are also continuously fed to the electronic switching arrangement and enumerated.

There are devices such as cutting springs and arrangements of coil springs are known that the Stop the coin connected to the thread or cut it when pulling it back.

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However, these known devices are generally not capable of this Task to be fulfilled because "" especially when using a very thin plastic tube, through the inside of which the thread is passed, with the coin hanging on this thread the Fraudulent intent. cannot be thwarted.

Another fraudulent intent is the so-called coin flip or coin click. Here an attempt is made to return a coin by means of the coin validator lower value via the return channel to the lower part of the examiner, i.e. that of the actual Coin check subordinate part, and thus also fed to the subordinate microswitch. This lower value coin takes on the function of the normally tested coin and actuates the microswitch which supplies the pulses to the electronic switching arrangement. In this type of manipulation of the coin validator, the coin, the counterfeit certificate or a disc can be the opposite generate an impulse only once for the thread play.

The object mentioned at the beginning is achieved according to the invention in that the microswitch a locking lever is assigned that is timed

beqrenzt blocks the coin channel or the coin path.

It is therefore the aim of the invention to provide a meaningful arrangement that can be used in connection tampering attempts with the electronic or electrical switching device, such as thread play or intent to defraud by bringing in coins of low value through the Coin return of the coin validator and subsequent actuation of the level provided for the impulse emission Microswitch to prevent.

Further features according to the invention emerge from the following description, which is based on the attached drawing as an exemplary embodiment as follows.

Show it:

Fig. 1 is a schematic plan view, Fig. 2 is a side view of Fig. 1,

Fiq. 3, 4 and 5 different switching positions ^

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Fig. 6 entering a correct coin *

Fiq. 7 a fraudulent intent.

The operation of the devices shown in the drawing is described as follows:

According to Fig. 1, the coin 1 introduced into the coin validator by inserting coins is moved over the track and after approval by an electronic coin check ε, not specifically shown, via the by a not shown electric generator The acceptance flap 3 held in the acceptance position is fed to the acceptance channel A.

When the coin 1 runs into the acceptance channel A, there is a locking lever 5, which can be rotated in the coin path is mounted about an axis 6, according to the coin size more or less far from one Stop 10 moves sideways and thus allows coin 1 to enter acceptance channel A. The coin 1 actuates a switching wire 8 of a microswitch 9 here. This makes the NC contact of the microswitch 9 is brought into the NO position and thus is not illustrated by a Output transistor (open collector arrangement)

the Elektronit E (Figure 3) entered a control pulse IM into the control part of the machine circuit.

Now that the coin 1 passes through the acceptance channel A, the jumper wire 8 is in the position 8a is released again, the jumper wire 8 goes back to the starting position, i.e. the connection C of the microswitch 9 restores the connection between C and NC position. Furthermore, according to the invention, the NC contact of the microswitch is included provided in the internal as well as in the external circuit of the safety circuit.

In the time diagram, FIG. 4 shows a short pulse I, by means of which the aforementioned electromagnet for the acceptance flap 3 is supplied with voltage over this period of time. As a result, the acceptance flap is held for the period of the passage of the accepted coin that has been found to be good. _{The longer pulse I m} , which starts at the same time with the pulse Ij ^, is used for the pulse output from the microswitch 9 to the control electronics of the machine, ie the I _m pulse provides the time

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which is necessary to the switching pulse of the switch 9 timely, but independently from the pulse Ik in the control part of a switching arrangement to forward to the other To enable switching operations.

FIG. 5 shows the pulse in the timing diagram. and Ik2 'two here, one after einaebrachter in AANZ short time unit in the coin coins that were found nut, as well as necessary for the Weiterleituna longer pulse I _m 1-2 ^for use on the micro-switch 9, which according to the coins inserted in Example of two consecutive ones that must be actuated twice.

The control of the pulse length I ^ or I ,, - I, as well as the pulse length I _1n or I ₁ J ₁ I _- O ^e tc. will be in

Münzorüfer made internally by the electronics E itself.

This arrangement means that there is no impulse even if many coins are inserted faster one after the other

lost, as always the one for repeated use of the microswitch 9 successively required impulses are available in time is held.

It goes without saying that an opto-electronic arrangement can also be provided instead of the microswitch 9. Here, too, the times are independent of one another, ie I ^ and I _1n are matched accordingly.

FIG. 6 shows the normal sequence of a coin introduced into the coin validator and found to be good.

According to the invention, the attempt at fraudulent intent becomes even more essential from the following presentation improved.

FIG. 7 shows the case of manipulation with a coin 1 which is provided with a thread 12. In this case, the coin checked by the electronics of the coin validator and found to be good runs quite normal with the thread attached to the coin

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over the raceways 2 and after pressing the Lock lever 5 in the acceptance channel A-. The coin 1 on thread 12 is over this thread stopped immediately after entering the acceptance channel A and lowered so far that the Coin the jumper wire 8 of the microswitch 9 actuated i.e. point C of switch 9 is set to NO. The output pulse in the control circuit of the machine is given. According to the invention, this pulse has in that of the Electronics E given time, otherwise the impulse will be passed on is prevented. i.e. the pulse width -; "abe is time-limited.

After the first pulse has been emitted, the coin 1 hanging on the thread 12 is countered in an attempt to defraud the normal direction of travel towards the coin slot. The coin 1 is hereby according to of the invention against the locking lever 5 located in the coin track 2, which in turn is conditional by its shape - by the withdrawn coin 1 around the axis 6 against the stop is pulled. The coin 1 is thus between

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the track 2 and the approach of the locking lever 5 held.

As a result, the jumper wire 8 cannot return to its starting position, rather it rests on the edge of the held coin. The switching lever located in microswitch 9 at point C cannot return to its starting position either, ie microswitch 9 does not switch to NC. The specified pulse time I _{m of} the electronics E expires, so when the coin 1 slackens on the thread 12 and when the locking lever 5 of the microswitch 9 is actuated again up to point 8a, i.e. with the yo-yo, there is no possibility of additional pulses in the control arrangement of the machine or the like.

According to the invention, the coin checking electronics are at the same time E up to the starting position of switch 9, i.e. until finally C connection again with; NC has locked. This means that coins introduced into the coin validator for checking are not

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"copy!

be checked, thereby the electromagnet of the acceptance flap 3 is not locked and the Coin shown in Figure 7 moves the acceptance flap 3 so far around its storage point that the Coin 1 of the coin return R is fed. A fraudulent intent of joining a Coin 1 on the thread 12 pulled against the locking lever 5 with a subsequent throw in as good Coin that runs against the held coin 1 and thereby the coin return R is supplied, is not possible due to the arrangement described above.

With the arrangement according to the invention it is largely prevented that by manipulation with coins, counterfeit certificates and discs in circulation, the goods, tokens, tickets, etc. not for the prescribed price, but for a lower price, i.e. for a smaller number of Coins or is given for free. The same applies in particular to the enumeration of coins in amusement and gaming machines.

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Claims (8)

m λ m "*. ι ,, tr ι n · m · ■ Hamburg, March 20th, 1983 Claims Electronic coin validator with "fraud prevention means." Manipulations in which the electronics control the coin entering the coin channel attenuated in such a way that their dimension and alloy components are determined and a corresponding impulse to a microswitch controlling the coin channel or coin path influenced in the sense of a coin return or acceptance, characterized in that that the microswitch (9) is assigned a locking lever (5) which temporarily limits the coin path (2) locks. 2. Coin validator according to claim 1, characterized in that the locking lever (5) rotatable around an axis (6) in the coin ² COPY ^ track (2) is stored and designed so that it by its own weight in such a way oscillates that in the idle state of the coin validator the passage of a coin (1) is constantly blocked in the coin track (2). - 3. Coin validator according to Claims 1 and 2, characterized in that the locking lever (5) is designed or made so that in an unlawful withdrawal of the coin (1) - z. B. with a thread (12) the Coin (1) firmly between the. • The locking lever (5) and the coin track (2) tense. . · 4. coin validator according to claims 1 to 3, characterized in that the of the Electronics (E) coming switching impulses to the microswitch (9) as well can be controlled on the acceptance flap (3) in such a way that the switching time (pulse duration) - 3 - for the acceptance flap (3) regardless of the on the switching time for the microswitch (9). 5. MünzDrüfer according to claim 4, characterized in that that the pulse duration for the acceptance flap (3) is shorter than that. intended for the microswitch (9) Period of time. 6. coin validator according to claims 1 to 5. characterized in that the acceptance flap (3) with an angled part so protrudes into the coin track that an introduction of coins from the coin return (2) in the coin acceptance (A) prevented is. 7. 'coin validator according to claims 1 to 6, characterized in that after detection a coin found for good (1) the electronics (E) via the locking lever (5) the microswitch (9) and the output transistor the electronics (E) can only work when the microswitch (9) is in the normal position. 8. Coin validator according to claims 1 to 7, characterized in that in the case of a coin (1) attached to a thread (12) or the like when it is withdrawn: ¹ ; the same a jumper wire (8) of the microswitch (9) cannot return to its normal position, ie the starting position.