MATERIALS/FASTENING: A new series of Corrosion-Resistant Pull-Down Latches from All Metric Small Parts (aMsp) is designed for various types of boxes and transportation equipment. Because springs are used, a tightening force is applied when the latch is closed. Since the latch is stainless steel, it has excellent corrosion resistance. The holes for a padlock are on the side, preserving the appearance, even when there is no lock. 3-D CAD models are available for download on the aMsp website.
Engineers at the University of San Diego’s Jacobs School of Engineering have designed biobatteries on commercial tattoo paper, with an anode and cathode screen-printed on and modified to harvest energy from lactate in a person’s sweat.
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