| 摘要 |
An apparatus for indicating a strike at bowling alleys has a display board provided with a plurality of displays adapted to show a plurality of symbols thereon, a detector adapted to detect the occurrence of a strike, a microcomputer adapted to determine a several-digit number at random in accordance with an output from the detector, and a lighting circuit adapted to show numerals on the display board in accordance with numeric signals from the microcomputer. The microcomputer outputs random numeric signals successively to the lighting circuit with the microcomputer has received an output from the detector, to show numerals on the display board so that the numerals look as if they were rotated, and the outputting of the numeric signals to the lighting circuit is continued so as to show after the lapse of a predetermined period of time the determined numerals on the displays on the display board in order at predetermined time intervals.
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