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If you’re into flexible couplings for friction clutching, shafting etc, I think it’s really important to be insulated, don’t you?

From the back of an electrical manual printed very early last century.

Quite instructive.


About tartanpartan

It won't surprise you to learn that I'm quite keen on books, and spend as much of my spare time as possible picking over second hand book stalls and charity book sales with my surprisingly delicate claws.