Amusement devices – Illusion or stage device – Maze or labyrinth
Patent
1993-05-14
1994-11-15
Mai, Lanna
Amusement devices
Illusion or stage device
Maze or labyrinth
160135, 522381, A63J 1100
Patent
active
053643119
ABSTRACT:
A collapsible labyrinth is constructed with a plurality of collapsible separating boards temporarily secured by vertical pivotal posts, two horizontal bars respectively on and under a line of separating boards to secure upper and lower ends of the pivotal posts, and tenons fitting in a mortise in a lower end of each separating board and also in one of tenon holes preset in the ground for securing temporatily each separating board so that the boards can be altered in position to make up a labyrinth route.
REFERENCES:
patent: 2976923 (1961-03-01), Hirashiki
patent: 3168135 (1965-02-01), Beifuss
patent: 4064590 (1977-12-01), Smith
patent: 4154440 (1979-05-01), Rusk
patent: 5046720 (1991-09-01), Bolly
patent: 5186230 (1993-02-01), Ostrander
patent: 5219316 (1993-06-01), Huffman
Klein David I.
Mai Lanna
Nguyen Kien
Rosenberg Morton J.
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