Dynamic lottery ticket validation system

• US 5,499,816 A
• Filed: 09/29/1993
• Issued: 03/19/1996
• Est. Priority Date: 09/29/1993
• Status: Expired due to Fees

• Current Assignee: Scientific Games Corporation
• Original Assignee: Scientific Games Corporation
• Inventors: Levy, Bret
• Primary Examiner(s): Sykes, Angela D.
• Assistant Examiner(s): WINAKUR, ERIC FRANK
• Application Number:
  US08/128,926
• Time in Patent Office: 902 Days
• Field of Search: 273/138 A, 273/139, 273/269, 283/49, 283/72, 283/901, 283/903, 341/106
• US Class Current: 273/139
• CPC Class Codes: A63F 2009/242 Bar codes
• CPC Class Codes: A63F 3/081 electric
• CPC Class Codes: G07C 15/005 with dispensing of lottery tickets

Abstract

A lottery ticket validation system reduces or eliminates spying on the status of tickets. The system uses a compression and encryption process to store its data compactly. The system is not a flag system. No particular bit in the memory corresponds to any given ticket. Thus, spying on a ticket'"'"'s status by accessing the data base is extremely difficult. The amount of memory allocated to the system is altered dynamically during the lifetime of a game depending on how many tickets have been validated. In this way, memory requirements are kept-low.

Claims

1. A system for storing lottery ticket numbers comprising:

reading means for reading a plurality of ticket numbers from a plurality of lottery tickets;

computational means operationally connected to said reading means for computing from said plurality of ticket numbers a single compressed number and for converting said single compressed number into said plurality of ticket numbers; and

a memory for storing said single compressed number.

2. The system of claim 1 wherein said computational means includes a table having a unique integer entry for each of the possible combinations of ticket numbers.

3. The system of claim 1 wherein said reading means includes a bar code reader.

4. The system of claim 1 wherein each of said ticket numbers includes:

a number corresponding to a pack; and

a winner in said pack identification number.

5. The system of claim 1 wherein at least one of said ticket numbers represents a status of a pack to which said ticket number belongs.

6. The system of claim 5 wherein said status indicates that the pack is lost.

7. The system of claim 5 wherein said status indicates that the pack is returned.

8. The system of claim 5 wherein said status indicates that the pack is activated.

9. The system of claim 5 wherein said status indicates that the pack is settled.

10. The system of claim 1 wherein said computational means includes means for storing in said memory a count of a quantity of said ticket numbers.

11. The system of claim 10 wherein said single compressed number and said count are stored in a segment of said memory.

12. The system of claim 11 wherein said segment of said memory is 32 bits.

13. The system of claim 12 wherein five bits of said segment store said count and 27 bits of said segment store said single compressed number.

14. The system of claim 13 wherein said five bits used for said count are the first five bits of said segment of said memory.

15. The system of claim 12 wherein said single compressed number represents a validation status of a quantity of ticket numbers up to twenty-nine.

16. The system of claim 11 wherein said single compressed number in said memory comprises a quantity of bits, said quantity of bits being less than a quantity of said ticket numbers wherein a validation status is represented by said single compressed number.

17. The system of claim 16 wherein said computational means further includes means for modifying the validation status of one of said ticket numbers represented by said single compressed number.

18. The system of claim 17 wherein said modification means includes:

conversion means for translating said single compressed number and said count into a memory array of ticket numbers;

means for adding a ticket number to said memory array;

sorting means for placing said ticket numbers in numerical order in said memory array; and

compression means for compressing said array of ticket numbers into said single compressed number.

19. The system of claim 18 wherein said conversion means includes:

a two-dimensional table stored in said memory;

selection means for computing a seed based upon said count, said single compressed number and said two-dimensional table;

means for extracting an array of ticket numbers based upon said seed, said count and said two dimensional table; and

updating means for changing said seed after each of said ticket numbers is extracted.

20. The system of claim 19 wherein said two-dimensional table includes:

a plurality of columns numbered zero through the quantity of said ticket numbers stored in said single compressed number;

a plurality of rows numbered zero through a largest quantity of said ticket numbers that the system will have to maintain in said memory, said quantity being equal to the result of dividing said quantity of ticket numbers by two and truncating any fractional part thereof; and

a plurality of table entries corresponding to the value of ##EQU11##

21. The system of claim 18 wherein said compression means includes:

a two-dimensional table stored in said memory;

selection means for computing a seed based upon said count and said two-dimensional table;

means for compressing said array into said single compressed number based upon said seed, said count and said two-dimensional table; and

updating means for modifying said seed based upon each said ticket number.

22. The system of claim 21 wherein said two-dimensional table includes:

a plurality of columns numbered zero through the quantity of said ticket numbers stored in said single compressed number;

a plurality of rows numbered zero through a largest quantity of said ticket numbers that the system will have to maintain in said memory, said quantity being equal to the result of dividing said quantity of ticket numbers by two and truncating any fractional part thereof; and

a plurality of table entries corresponding to the value of ##EQU12##

23. A system for storing lottery ticket numbers comprising:

reading means for reading a plurality of ticket numbers from a plurality of lottery tickets;

computational means operationally connected to said reading means for computing from said plurality of ticket numbers a single compressed number and for converting said single compressed number into said plurality of ticket numbers;

a memory for storing said single compressed number; and

allocation means for altering a size of said memory during a lifetime of a game.

24. The system of claim 23 wherein said memory is divided into a plurality of pack records, each of said pack records representing a validation status of the ticket numbers within a pack of tickets.

25. The system of claim 23 wherein said computational means includes means for storing in said memory a count of a quantity of said ticket numbers.

26. The system of claim 25 wherein said single compressed number and said count are stored in a segment of said memory.

27. The system of claim 26 wherein a plurality of segments store said lottery ticket numbers.

28. The system of claim 27 wherein each said segment represents lottery ticket numbers within a sequential range.

29. The system of claim 28 wherein said allocation means allocates a first segment of memory when a first ticket number within a first range is validated.

30. The system of claim 29 wherein said allocation means allocates a second segment of memory when a first ticket number within a second range is validated.

31. The system of claim 30 wherein said allocation means deallocates said first segment of memory when all ticket numbers within said first range have been validated.

32. The system of claim 31 further including a memory pool, and wherein said memory pool is divided into a plurality of slots, each of said slots being a size of an integer number of said segments.

33. The system of claim 32 wherein each said pack record further includes a pack record header representing the size of the slot currently storing said pack record.

34. The system of claim 23 wherein said allocation means increases the size of said memory during a first portion of said game and decreases the size of said memory during a second portion of said game occurring after said first portion.

35. The system of claim 23 wherein said allocation means varies the size of said memory as a function of said single compressed number.