Statistical sampling apparatus

Details Statistical sampling apparatus Statistical sampling apparatus

1993-12-10

1994-09-20

Mancene, Gene

Education and demonstration

Mathematics

273144B, G09B 2302

Patent

active

053484800

ABSTRACT:
A statistical sampling apparatus is formed with a box-like enclosure having transparent top, front and bottom walls. A stationary ledge extends in a plane between the top and bottom wails and stops short of the front wall so that there is a space that communicates between the volume below the ledge and the volume above the ledge. A plurality of identically shaped beads are disposed within the enclosure. The upper surface of the ledge has a patterned array of identical recesses which receive certain of the beads when the enclosure is up-ended and the beads are allowed to wash over the ledge. The beads are of different colors in a known distribution, and the patterned array of recesses is divided into series of a smaller numbers of recesses for statistical sampling purposes.

REFERENCES:
patent: 704979 (1902-07-01), Terrazas
patent: 1613575 (1927-01-01), Brewer
patent: 3095655 (1963-07-01), Berglund et al.
patent: 3679211 (1972-07-01), Hartley
patent: 3864850 (1975-02-01), Helmelke
patent: 4444394 (1984-04-01), Pasquine
patent: 4545578 (1985-10-01), Stagg
patent: 4796890 (1989-01-01), Snyder
Quantum Co., Malta, New York, Oct. 1985.

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