On Thu, 2011-06-09 at 21:12 -0600, YES NOPE9 wrote: > I am pondering about how to make a connector that takes zero-force to ins= ert and remove for power tools. >=20 > I love the way the power cord on the Mac laptops pulls out without destro= ying anything. >=20 > I hate all the cords that hang off my power tools. They are hard to stor= e and they get mangled. I would like to install connectors on my power tool= s on short ( 10cm ) cords or directly to the tool. The connector on the to= ol would have a round male housing. There would be 3 connections. The con= nector would look like a bulls eye. #1 Hot center #2 Neutral ring #3 = Safety ground ring There would be ribs to prevent the mating female conne= ctor from spinning. >=20 > The extension cord would have a female connector with a shroud that went = around the male connector. The shroud would have channels that mate with t= he male connector ribs ( not for electrical purposes ). The female connect= or can be more expensive than the male connector since it is expected there= will be many more males than females. =20 >=20 > The extension cord detects when the female has been engaged or the female= is being disengaged. The extension cord powers down when it is disconnect= ed from male connector. #1 for safety .... stupid user can stick tongue i= n connector with no fear of shock. Cord can be safely cut when not connect= ed. #2 to prevent burns on the connector mating surfaces. >=20 > What would be good mating surfaces to use ? Would it be possible to make= the mating surfaces replaceable ? Get air tools. Only one "cord" needed for all your tools. Benefit is the tools tend to be lighter as well, plus in some cases much cheaper. TTYL --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .