In Britain a crank is someone odd, and in the USA it's someone bad-tempered.
Hm. This isn't going to be difficult either way, is it.
Even if you're surrounded by models of good humour and balanced logic (do send your address, if so) then there are other cranks available for spotting.
A crank is basically a bent handle.
and here's another (the treadle bit)
And if you thought those were out-of-date, how about this paddle-boat:
that comes from the 1400s.
If that boat had had sails, then it might have been cranky, which means easily keeled over by the wind.
Cranks on vehicles are usually hidden inside crankcases, nowadays, but here's a compound crank that's not changed much in centuries:
Seeking out your nearest crowd is still going to be the easiest way to spot this frippet, though.
Spot the frippet: crank. This word comes from the Old English cranc, and is related to the Middle Low German krunke, wrinkle.