Monday, May 20, 2013

FOR KIDS: Flagging loose bolts

?Smart alert washer? automatically flags when a nut is coming loose, warning of potential danger

?Smart alert washer? automatically flags when a nut is coming loose, warning of potential danger

By Sid Perkins

Web edition: May 18, 2013

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Nutty tech

Mei Kam (left), Mei Di Zhu (center) and Jia Ying Zhong (right) designed a ?smart washer? that provides an alert when the nut holding the washer on a bolt comes loose.

Credit: Patrick Thornton/SSP

When they are new, structures such as buildings, bridges and playground equipment tend to be very sturdy. But over time, they can become wobbly and unsafe as nails, screws and other fasteners loosen. Now, a trio of student inventors from Hong Kong has designed a new type of washer. It quickly shows inspectors when the nut it lies next to on a bolt is loose.

Source: http://www.sciencenews.org/view/generic/id/350556/title/FOR_KIDS_Flagging_loose_bolts

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