Weighing scales
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United States of America Patent
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-
Mar 16, 1993
Grant Date -
N/A
app pub date -
May 10, 1991
filing date -
May 11, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Weighing scales for use as a teaching aid in educational establishments. The scales include a platform adapted to receive an article to be weighed, a compressible, fluid-containing reservoir, in the form of bellows or diaphragm provided with a fixed wall. The scales are provided with display means which are in fluid communication with the reservoir. The display means is a transparent flexible tube adapted to display the volume of fluid displaced in response to the article being placed upon the platform.
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