Sentence examples for fusee from inspiring English sources

With this arrangement, the mainspring was made to rotate a barrel in which it was housed; a length of catgut, later replaced by a chain, was wound on it, the other end being coiled around the fusee.

When the mainspring was fully wound, the gut or chain pulled on the smallest radius of the cone-shaped fusee; as the mainspring ran down, the leverage was progressively increased as the gut or chain pulled on a larger radius.

With correct proportioning of mainspring and fusee radii, an almost constant torque was maintained as the mainspring unwound.

The going barrel, in which the mainspring barrel drives the wheeltrain directly, is fitted to all modern mechanical watches and has superseded the fusee.

For the purpose of equalizing the force of the mainspring, almost all chronometers are fitted with a fusee (a cone-shaped grooved pulley) and a chronometer compensation balance, by which the effects of heat and cold upon the timekeeping are practically nullified.

Solution of the problem was advanced almost as soon as the mainspring was invented (about 1450) by the application of the fusee, a cone-shaped, grooved pulley used together with a barrel containing the mainspring.

This explains the great importance of the fusee.