Card – picture – or sign exhibiting – Display device with free article movement
Patent
1994-06-02
1995-06-27
Dorner, Kenneth J.
Card, picture, or sign exhibiting
Display device with free article movement
40439, 40477, G09F 1900
Patent
active
054268788
ABSTRACT:
An amusement device which includes a transparent tank filled with a liquid medium such as water. Contained within the tank is a plurality of uniform diameter, positive and negative buoyant spheres. Disposed inside the tank is a downward directional tubal system and an upward directional tubal system which are used to move the spheres in opposite directions of their buoyancies. Located beneath the floor of the tank is an air pump which feeds air into the tubal systems to create currents which forcibly move the spheres through the tubes. Also disposed in the tank are downward and upward directional tracks which route the spheres to their respective staging areas, depending upon their buoyancies. For example, positive buoyant spheres travel upward in the liquid medium along the underside of the upward directional track while the negative buoyant spheres travel downward in the liquid medium along the top side of the downward directional track. The positive buoyant spheres move through the downward directional tubal system and then along the bottom surface of the track to a staging area. From there, they are again drawn into the downward directional tubal system and the cycle repeats. The negative buoyant spheres travel in the opposite direction.
REFERENCES:
patent: 1664444 (1928-05-01), Borchert
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patent: 4643693 (1987-02-01), Rubinstein
patent: 5017171 (1991-05-01), Shiina
patent: 5228225 (1993-07-01), Lee
Davis Cassandra
Dorner Kenneth J.
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