I vaguely recall reading about a "magnetically-coupled" plug than used strong magnets to "hold" the contacts together.
The "powered" end had a trio of concave-looking circular "sockets" that were held against/in-contact-with by the magnets to the "un-powered" trio of convex-looing circular "plugs."
A lot of force was needed to "directly" pull the two apart, but they could be easily "tipped" apart.
Last edited by gone-ot; 10-28-2012 at 10:51 PM..
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