>=20 > On Jun 10, 2011, at 2:34 PM, Herbert Graf wrote: >=20 > 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 in= sert and remove for power tools. >>=20 >> I love the way the power cord on the Mac laptops pulls out without destr= oying anything. >>=20 >> I hate all the cords that hang off my power tools. They are hard to sto= re and they get mangled. I would like to install connectors on my power too= ls on short ( 10cm ) cords or directly to the tool. The connector on the t= ool would have a round male housing. There would be 3 connections. The co= nnector 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 conn= ector 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 = the male connector ribs ( not for electrical purposes ). The female connec= tor can be more expensive than the male connector since it is expected ther= e will be many more males than females. =20 >>=20 >> The extension cord detects when the female has been engaged or the femal= e is being disengaged. The extension cord powers down when it is disconnec= ted from male connector. #1 for safety .... stupid user can stick tongue = in connector with no fear of shock. Cord can be safely cut when not connec= ted. #2 to prevent burns on the connector mating surfaces. >>=20 >> What would be good mating surfaces to use ? Would it be possible to mak= e the mating surfaces replaceable ? >=20 > Get air tools. Only one "cord" needed for all your tools. >=20 > Benefit is the tools tend to be lighter as well, plus in some cases much > cheaper. >=20 > TTYL >=20 I appreciate your suggestion. Air tools are nice. I have air tools and I never use them because an air supply has to be nearb= y. Electric power tools can even run off vehicles with minimal planning an= d effort. Since I am lazy .... electrical tools get used. 99guspuppet --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .