Color changing hourglass assembly
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United States of America Patent
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Jun 18, 1996
Grant Date -
N/A
app pub date -
Sep 18, 1995
filing date -
Sep 18, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A color-changing, position-reversible hourglass assembly having two transparent bulbs one above the other and a storage compartment adjacent each bulb, the bulbs and compartments being joined together by a neck. Intercoupling the bulbs and the compartments is a crossover network which passes through the neck to couple each bulb to the compartment adjacent the other bulb. In operation, when one bulb and its adjacent compartment are in an up position and are respectively loaded with sand of different color, then sand of one color appears to trickle from the up bulb into the compartment in the down position while sand of another color appears to trickle from the up compartment into the down bulb. The resultant apparent flow of sand from a higher to a lower level creates the illusion that sand flowing out of the up bulb is undergoing a color transformation as it flows into the down bulb.
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Cited Art Landscape
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