Slot machine

Abstract: A slot machine is provided with a single stop button which is manipulated by a player every time it is required to stop a plurality of symbol columns under movement one after another; a selection member for selecting a symbol column to be stopped every time the stop button is manipulated; and a stop member for stopping the move­ ment of the symbol column selected by the selection member. The player can stop all of the symbol columns sequentially in order by manipulating the single stop button as many times as that corresponding to the number of symbol columns.

Description: Background of the invention The present invention relates to a slot machine, and more particularly it relates to a slot machine provided with stop buttons operated by a player aiming at stopping symbols on a winning line. After coins (including tokens) are inserted into a slot machine, in order to move a plurality of symbol columns, such as a plurality of reels having symbols disposed on the periphery thereof are driven into rotation by pulling an operation handle. And while a player plays game, a winning is determined by a kind of combination of symbols positioned on the winning line at the time of each reel stop. With slot machines of such a kind, there are known an automatic stop type slot machine wherein each reel is automatically stopped, and manual stop type slot machine wherein stop buttons for stopping respective reels are provided. With the manual stop type slot machine, a player can at any desired timing manipulate respective stop buttons for sequentially stopping each reel. Therefore, with this type of slot machine, a player can make full use of his or her intuition and technique in playing game, and it is very interesting although it can not be enjoyed with an automatic stop type slot machine. In a conventional manual type slot machine, for example, a three reel type slot machine, three stop buttons are provided which correspond in number to that of reels. To stop all of the three stop buttons, a player is required to sequentially manipulate the three buttons. It is common for the slot machine to be repetitively operated, and in view of this, the manipulation by a player of the three stop buttons, which are generally mounted on different positions from each other, is very cumbersome. Moreover, the provisions of respective reels for each reel requires to mount almost the same parts on different positions, thus it is not reasonable in view of manufacture, assembly and also cost. GB-A-2119145 discloses a gaming machine wherein a single stop button may be provided for stopping all of the reels. It is a primary object of the present invention to provide a slot machine which includes facilities which can increase the variety in games for which it can be used. The invention provides a slot machine of a type having a plurality of columns of moving symbols and arranged so that, at the time when the plurality of moving symbol columns are stopped, whether there is a win or not is judged in accordance with a combination of stopped symbols on a winning line, comprising a single stop button manipulated by a player for stopping one after another said plurality of symbol columns; stop means for stopping said one of the plurality of symbol columns; means for generating a respective stop code for each of the symbol columns; and means for decoding the stop code and stopping the corresponding columns of symbols; characterised in that the means comprises means for generating stop codes for the respective symbol columns in a manner effective to stop the reels in a random order. In order to prepare moving symbol columns, it may be possible to use, as described previously, those having symbols on the periphery of each reel, and in addition, as is done in a video type slot machine, several kinds of symbols may sequentially be displayed in a preset order on a CRT screen. The invention will be further described by way of non-limitative example with reference to the accompanying drawings in which:- Figure 1 shows an example of an outer-appearance of a slot machine according to the present invention. Figure 2 is a block diagram showing a construction of an embodiment of a slot machine according to the present invention. Figure 1 shows an example of a slot machine according to the present invention. After a coin is inserted into a coin slot 1, a player manipulates a start lever 2 to drive into rotation three reels 3 to 5 (refer to Figure 2) having symbols disposed thereon. Through reel windows 6A to 6C, three symbols on each reel 3 to 5 are observed while the reel stops, however this is a almost impossible while the reel is moving. After each reel 3 to 5 reaches a constant state in its rotation, the manipulation of a stop button 7 becomes in an enable state. It is noted here that the stop button 7 is commonly used for all of the three reels 3 to 5. More in particular, as an example a first depression manipulation by a player of the stop button 7 makes the first reel 3 stop, with the symbols being observed through the reel window 6A. At any desired timing following the first manipulation, if a second depression manipulation is carried out, then the second reel 4 stops. Similarly, a third manipulation makes the third reel 5 stop. Thus, after each reel is sequentially stopped, symbols for each reel at a stop may be observed through respective reel windows 6A to 6C. A winning line 10 is provided for use in common with all the reel windows 6A to 6C. At the time when all of the reels 3 to 5 stop as described above, a winning judgement is made basing upon the combination of symbols stopping on the winning line 10. In addition to the winning line 10, it is possible to provide other winning lines 11 to 14 as shown in Fig. 1. In this case, it is possible to increase the number of effective winning lines in accordance with the number of coins inserted prior to the start of a game. And as the result of the winning judgement, if a winning is gotten, as many number of coins as the number corresponding to the kind of that winning are paid out from a pay out outlet 8. The above processings are performed under a control system including a microcomputer 21 shown in Fig. 2. In Fig. 2, upon manipulation of the start lever 2 mounted on the front portion of the slot machine, a start signal generator outputs a start pulse. The start pulse is input to a motor control section 22, and in turn drive pulses generated at the pulse generator 24 are supplied through the motor control section 22 to motor drive sections 25 to 27, thereby driving stepping motors 28 to 30. As a result, each reel 3 to 5 rotates and a game starts. The drive pulses for driving the respective stepping motors 28 to 30 are on the other hand cumulatively counted by respective counters 34 to 36 provided for each reel. The cumulative count value of the drive pulses are utilized in identifying the symbols on each reel as will be described later. To this end, it is necessary to reset the respective reset counters 34 to 36 every one rotation of a reel. The reset pulse for this purpose is obtained by detecting light intercepting tip 3a to 5a mounted on a part of each reel 3 to 5 by means of photo-interrupter 37 to 39. When each reel 3 to 5 reaches a constant rotation, it is possible to manipulate or depress the stop button 7 to stop the reel rotation. Each time the stop button 7 is manipulated, a stop pulse is output to the reel selection section 50. The reel selection section 50 is made of for example a shift counter and outputs a special stop signal to the motor control section 22, the stop signal being composed of a combination of "H" and "L" signals (high level and low level signals) defined in a accordance with the number of depressions of the stop buttons 7 and corresponding to each reel. The motor control section 22 including a decoder for interpreting the stop signal, terminates the drive pulses supplied thereto from the pulse generator 24 so as to stop the stepping motor corresponding to the stop signal supplied to the motor control section 22. Therefore. for example, a first depression of the stop button makes the stepping motor 28 driving the first reel stop, a second depression makes the stepping motor 29 stop, and a third depression makes the stepping motor 30 stop. After all of the reels 3 to 5 stop, symbols for respective symbols stopping on the winning line 10 are identified by symbol detection sections 40 through 42 with reference to the counted value of the drive pulses in the pulse counters 34 to 36. The symbols for resepctive reels which are transformed into a code made of a certain number of pulses are judged by a winning judgement section 43 whether the three symbols of the reels on the winning line 10 correspond to a winning combination or not, and if it is a winning, the number of coins to be paid is judged. The judgements are performed referring to a winning table (for example, a ROM memory is used) included in the winning judgement section. If a winning is gotten, an appropriate number of coins are paid out with the help of a coin ejection control section 44 and a hopper 45. The present invention may be applied to a slot machine of a "credit type" in which without inserting coins for each game or without paying out coins for a winning for each game, a game is continued with a display of the numbers of coins used and coins obtained for each game, by inserting a plurality of coins at the start of a game, or by using a credit card which enables a data entry of the number of coins available at the time. In such a "credit type" slot machine, at the end of the game, a settlement button is manipulated, and by calculating the number of coins used and coins obtained, an appropriate number of coins are paid out, or the credit card is updated with a new date at the time. The reel selection section 50 has a self selection function which enables to stop each reel in a random order. To this end, for example, a signal indicative of the depression of the stop button 7 is used as a signal opening a gate of the reel selection section 50 such that the stop signal generated randomly from each reel is made effective in accordance with the depression timing of the stop button 7. As appreciated from the above description, since a single stop button is commonly used for stopping each of a plurality of reels, a cumbersome manipulation for a conventional type slot machine stop button has been eliminated, and according to the present invention, interest upon the game is not reduced and the manipulation itself is simplified. Further, the stop button, a manipulation detection circuit for the stop button, and the like are not required more than a single set thereof, thereby making the slot machine construction simple.

Claims: A slot machine of a type having a plurality of columns of moving symbols (6A, 6B, 6C) and arranged so that, at the time when the pluarlity of moving symbol columns (6A, 68, 6C) are stopped, whether there is a win or not is judged in accordance with a combination of stopped symbols on a winning line (10, 11, 12, 13, 14). comprising a single stop button (7) manipulated by a player for stopping one after another said plurality of symbol columns (6A, 6B, 6C): stop means (22) for stopping said one of the plurality of symbol columns (6A, 6B, 6C); means (50) for generating a respective stop code for each of the symbol columns (6A, 6B, 6C); and means (22) for decoding the stop code and stopping the corresponding columns of symbols (6A, 6B, 6C); characterised in that the means (50) comprises means for generating stop codes for the respective symbol columns in a manner effective to stop the reels in a random order. A slot machine according to claim 1 characterised in that said symbol columns (6A, 6B, 6C) comprise a plurality of symbols disposed on a periphery of reels. A slot machine according to claim 2 characterised in that said reels (6A, 6B, 6C) are driven into rotation by stepping motors (28, 29, 30). A slot machine according to claim 3 characterised in that said stop means (22) terminates the delivery of driving pulses supplied to said stepping motor (28, 29, 30).

Inventors: OKADA KAZUO, OKADA, KAZUO
Applicants: UNIVERSAL KK, KABUSHIKI KAISHA UNIVERSAL
Application year: 1984
Main classification: G07F17
IPC codes: G07F17, A63F5, A63F9