发明名称 RANDOM SELECTION SYSTEM FOR BINGO AND THE LIKE
摘要 A random selection system including a repeating selector operating for a randomly varied period of time following each successive actuation. The random period of time is achieved through a capacitor timing circuit by means of a variable charging time, and changes in capacitance and other circuit parameters.
申请公布号 US3653026(A) 申请公布日期 1972.03.28
申请号 USD3653026 申请日期 1970.06.03
申请人 FREDERICK A. HURLEY 发明人 FREDERICK A. HURLEY
分类号 G07C15/00;(IPC1-7):G08B5/36 主分类号 G07C15/00
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