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(11) | EP 0 036 291 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Improvements in or relating to gaming or amusement machines |
| (57) in a gaming machine, e.g. of the 'fruit machine' type the symbols are inscribed on
the peripheral cylindrical surface of drums or reels. A respective co-axial disc (1)
is mounted for rotation with each symbol bearing drum and the rotational position
of the drum is sensed by sensing the rotational position of the disc (1). A ring (4)
of alternate black and white surfaces is painted on the disc. A light source (6) and
receiver (7) are mounted to one side of the disc and reflections from the white areas
of the ring (4) are reproduced as pulses in the receiver. These are counted to provide
an indication of the position of the disc. |