Quote:
Originally Posted by unabridged
Also thought this early attempt at safety sheathing by MK was ingenious (and overly complicated) And possibly extremely rare?
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I'm sure I read somewhere (probably in a release when BS1363 was amended in 1987 to require sleeved L & N pins), that a sleeved pin plug was patented by Crabtree in 1967. Could this MK version with sprung shrouds be an attempt to avoid paying royalties to Crabtree?. In any case, MK introduced their "Safetyplug" with conventional sleeved pins around 1972 (I've got a 1972 MK catalogue and it's in there as the "new" Safetyplug).