Slot machine

• US 4,772,023 A
• Filed: 03/16/1987
• Issued: 09/20/1988
• Est. Priority Date: 03/14/1986
• Status: Expired due to Term

• Current Assignee: Aruze Corp. (Universal Entertainment Corporation)
• Original Assignee: Kabushiki Kaisha Universal
• Inventors: Okada, Kazuo
• Primary Examiner(s): Lastova, MaryAnn
• Application Number:
  US07/026,440
• Time in Patent Office: 554 Days
• Field of Search: 273/143 R, 273/138 A, 273/1 E, 364/410-412, 364/717
• US Class Current: 273/143.00R
• CPC Class Codes: G07F 17/3244 Payment aspects of a gaming system, e.g. payment schemes, setting payout ratio, bonus or consolation prizes

Abstract

A slot machine having X series of symbols arranged side by side which selects a combination of symbols on a winning line. For the selection of a combination of symbols, a random number is sampled from a series of random numbers the number of which is 2ⁿ and is referred to symbol tables associated with each symbol series wherein are coded data on symbols of which the number is equal to the Xth root of 2ⁿ. A combination of symbols is thus selected with the same probability as for sampling a random number.

Claims

1. A slot machine having X series of lengthwise movable symbols arranged side by side, and means to select a symbol from each said series of lengthwise movable symbols according to a random number sampled at random from a series of random numbers, there being 2ⁿ random numbers in said series of random numbers, so as to provide a combination of X symbols on a line, n being a positive integer, a symbol table individual to each said series of lengthwise movable symbols, said table containing data of said symbols, said data being equal in number to the Xth root of 2ⁿ ;

and means for comparing said sampled random number to said data of said symbol table as to each of said X series of lengthwise movable symbols, thereby to identify a specific combination of X symbols corresponding to said sampled random number.

2. A slot machine as defined in claim 1, wherein n is 15 and X is 3.