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#1381
Sorry Jim.
You're on the right lines, John. It is from a clock. But what is it, and what is its function?
Sorry Jim.
You're on the right lines, John. It is from a clock. But what is it, and what is its function?
Not quite, John. Although it was used in clocks with a pendulum, it was invented much earlier than the pendulum.
Not gravity.
A clue: These were used in antique spring-powered mechanical watches and clocks, a ????? is a cone-shaped pulley with a spiral groove around it, wound with a cord or chain which is attached to the mainspring barrel.