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Solution to Coffee-time Challenge
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09/10/2008
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The solution to last month’s challenge – on redesigning electrical plugs – comes from 42 Technology, based in St Ives, Cambridgeshire. Our illustration explains it all. The plug opens out flat, in such a way that all three pins go past each other. They are then held within the flattened enclosure, while remaining firmly and permanently attached to the faces of the plug, which now rest against each other in the folded form. In the samples we saw, the third earth pin is not connected to an earth cable, being designed for laptop power supply and mobile phone chargers that do not require an earth conductor, since they are double insulated.
42 Technology
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Author
Tom Shelley
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