This invention relates to a gaming device com¬ prising a gaming machine, a payout machinery con- trolled by the gaming machine and driven by a direct voltage motor, the operating time of which machinery- proportional to the size of the payouts is controlled by a control signal produced by the gaming machine, and means for feeding the motor with drive current depending on the control signal of the gaming machine.

In conventional gaming devices of the type de¬ scribed above, the motor of the payout machinery is controlled by a signal given by the gaming machine, which signal feeds the motor of the payout machinery directly with drive current through a suitable switch, e.g. a transistor. This way of controlling the payout machinery is relatively sensitive to ex¬ ternal disturbance. Such disturbance can occur for instance by electromagnetic pulses, by spraying che¬ micals or by changing the drive current. The inten¬ tion is then either to make the motor of the payout machinery start without cause or to prevent a correct payout operation from ending. The object of the present invention is to pro¬ vide a gaming device, in which the operation of the payout machinery is substantially more reliable than before and which is not to the extent sensitive to external disturbance as the prior art gaming devices. This is achieved by means of the gaming device of the invention, which is characterized in that the control signal is a digital code of at least 2 bits and the means for feeding the motor with current com¬ prise a control register with an input receiving the control signal and with an output, the state of which

depends on the value of the control signal, a shift register with an output, a reset input and a data in¬ put receiving the output of the control register, and a logic for time control with a starting input con- nected to the control register and with an output connected to the reset input of the shift register to reset the shift register output to zero after the control time set in the logic for time control has expired, whereby the shift register output comprises the drive current for the motor of the payout machin¬ ery either directly or through a current amplifier.

By substituting the conventional signal of on/off type given by the gaming machine earlier for a digitally coded control code, it is possible to sub- stantially eliminate the possibility that the gaming machine unintentionally or as a result of a possible disturbance would give a control code for starting a payout. By forming the very circuit feeding the motor of the payout machinery with drive current in such a way that, firstly, it only reacts to a correct con¬ trol code and secondly, it controls its own function as per time by means of a logic for time control, the possibility is substantially eliminated that stopping the payout for some reason would be prevented. To reduce the possibilities of external distur¬ bance further, the procedure according to the inven¬ tion is that the control register, the shift register and the logic for time control are arranged in the same integrated circuit, which substantially elimi- nates the possibility of preventing the operation of the logic for time control and makes an external dis¬ turbance of also other mutual connections between these parts impossible.

In the following, the gaming device of the in- vention is described in greater detail referring to

the enclosed drawing, in which

Figure 1 shows the main structural parts of a gaming device of the invention in the form of a block diagram and Figure 2 shows a basic block diagram of a con¬ trol and supervisory circuit system of a payout ma¬ chinery in the gaming device of the invention.

Figure 1 shows a gaming device according to the invention, comprising a gaming machine 1 usually in- eluding a micro processor, interface 12 between the player and the gaming device including lamps, switches, motors, displays and the like, by means of which the player uses the gaming device, and a con¬ trol and supervisory section 3, which by means of the gaming machine 1 controls a payout machinery 2. The payout machinery 2 receives counters, coins or the like from a coin receiving section 13. At the begin¬ ning of a game, the player conventionally feeds a gaming fee into this money receiving section 13, from which the coins or the like move to the payout ma¬ chinery 2, delivering the possible payouts to the player under the control of the gaming machine 1. In the gaming device according to the invention, a con¬ trol output 4 of the gaming machine 1 to the control and supervisory section is a digital code of at least 2 bits. In practice, it can be for instance a code of eight bits, which then can get 256 different states. Only one of these states makes the control and super¬ visory section 3 start the payout machinery 2. In this way, a starting of the payout machinery uninten¬ tionally or through disturbance is substantially eli¬ minated.

Figure 2 shows a basic block diagram of the control and supervisory section 3 in greater detail. This control and supervisory section ^' comprises a con-

trol register 5, a logic 8 for time control and a shift register 7 operating under the control thereof. The input of the control register 5 receives the con¬ trol code 4 given by the gaming machine 1. It also receives signals for choosing the register, which signals bring this control register into a state for receiving the code 4. Depending on the content of the digital code 4, the output 6 of the control register 5 either has state "0" or state "1". State "1" then means a payout. At the same time when the digital code 4 is entered into the control register 5 and the output 6 of the control register 5 therefore shifts to state "0" or state "1", a clock signal is produced in an output 14 of the control register 5. This clock signal is connected to a starting input 9 of the log¬ ic 8 for time control and also to the clock input of the shift register 7. Each entry into the control register starts the logic for time control irrespec¬ tive of whether the output of the control register is changed or not. In the shift register 7 the clock signal makes the signal in its input D shift to its output Q. The state of this output Q is preserved till a new digital word is entered into the control register 5 or the control time of the logic 8 for time control expires. In the latter case, a signal is produced in an output 10 of the logic 8 for time con¬ trol, which signal makes an AND gate 15, one input of which is a RESET signal, feed a signal resetting the output Q of the shift register to zero to an input R of the shift register 7. Thus the logic for time con¬ trol unevitably interrupts the payout after a desired period of time control. Such a time control period can be for instance 0,5 seconds. The payout machinery operates in such a way that it feeds out one coin or the like during one payout operation in practice.

Moreover, to the output Q of the shift register 7 is connected a current amplifier 11, which can be neces¬ sary in order to provide a sufficient drive current for the motor M of the payout machinery 2. In the gaming device of the invention, the con¬ trol register 5, the logic 8 for time control and the shift register 7 shown in Figure 2 are preferably in¬ tegrated to the same integrated circuit. In this way the connections between its different parts are not subjected to external disturbance. This also guaran¬ tees that the operation of the logic for time control cannot be prevented from outside.

The gaming device of the invention has above been described by means of one exemplifying embodi- ment only and it is to be understood that the idea of the invention, i.e. to control the payout by means of a control code and to supervise the payout by means of time control, can be carried out also by means of circuit arrangements of other types than described above without differing from the scope of protection defined by the enclosed claims, however.