Microsoft Research Community
Gravity power
The gravity powered floor lamp“The column contains five ten-pound brass weights that rest on a sled; when set in place by the user, they drift to the bottom of the lamp over the course of four hours. A high efficiency ball-screw converts the downward Read More...

Read the complete post at http://www.richardbanks.com/trends/?p=8261


Posted 02-26-2008 5:36 AM by rb.trends
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