> A few yaers ago I represented a company that manufactured "Tilt Switches". > Basicly, it was a glass bulb with some mercury in it and 2 wires fused through > the glass (same principal as a home thermostat). When the switch was attached > to an object, any movement would cause the mercury to make the connection and > any number of things could be activated ...., car alarms, horns, sirens, > llights, etc. Maybe something like this, something that created a loud noise > or a flashing light, would be good to have in addition to the chains and > cables. Shouldn't be too hard to make one. > Suggest that it would be good to use something besides mercury in such a device, as mercury is a pretty nasty metal. It is persistent and bioaccumulates in the ecosystem. see http://www.epa.gov/glnpo/bnsdocs/merccomm/ Here in the Great Lakes region, there is a concerted bi-nation effort to reduce mercury (and other toxics' use) to help preserve the Great Lakes ecosystems. See: http://www.epa.gov/glnpo/p2/bns.html#Purpose Erik at the south end of Lake Michigan *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Fri Jun 20 2003 - 20:47:40 PDT
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