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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There's a few patents for MK plugs on Espacenet, as follows;
GB1067870 - This is the MK plug with the sprung pin shields in your photographs
GB1292991 - The standard sleeved pin plug
GB1269421 - A version of the Safetyplug cord grip, not quite the same as the ones we commonly see
I can't fing a Crabtree patent for a sleeved pin plug, so I'm wondering now whether I was right before regarding a 1967 Crabtree patent.