Quote:
Originally Posted by stainless
'I fondly remember the clockwork operated doorbells, where you turned the gong to wind up the spring...'
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We had one of those on the outer door when I was a kid. On the inner door we had another mechanical doorbell which was, in effect, a bicycle bell. Didn't need winding up; just a push-rod through the door from the bell-push acting via gears onto a weighted centrifugal mechanism which threw out circular hammers to strike the gong.