Education and demonstration – Physical education – Developing or testing coordination
Patent
1983-08-11
1984-07-03
Grieb, William H.
Education and demonstration
Physical education
Developing or testing coordination
G09B 1924
Patent
active
044577222
ABSTRACT:
An educational toy having a substantially rectangular and planar base, a plurality of locks attached to a common side of the base and capable of adjustment to a locked or to an unlocked configuration, a plurality of fasteners adjustably mounted on the base, a tool for adjusting the fasteners, a knob threaded onto a bolt attached to the base, a pair of doors pivotally attached to the base and to at least one of the lock members such that the attached lock member can be adjusted to lock the doors in a closed configuration, and an image mounted on the base and positioned such that it is covered by the doors when in the closed configuration. The tool and all of the lock and fastener components are either attached to or tethered to the base so that the components cannot be lost.
REFERENCES:
patent: 2623303 (1952-12-01), Mindel
patent: 2774150 (1956-12-01), Genin
patent: 2835986 (1958-05-01), Roeder
patent: 2972820 (1961-02-01), Cano
patent: 3427731 (1969-02-01), Debolt
patent: 3538620 (1970-11-01), Kohner et al.
patent: 3546788 (1970-12-01), Drumm
patent: 4083123 (1978-04-01), Livermore
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