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The Gyromax is a 'free sprung' balance, meaning there is no regulator on the wheel's balance spring for adjusting the watch's rate, so the collets are used for adjusting both poise and rate. Swiss patents were granted to Patek Phillipe for the Gyromax balance on May 15, 1949 and December 31, 1951, and the balance was first used in watches in 1952.
A balance wheel, or balance, is the timekeeping device used in mechanical watches and small clocks, analogous to the pendulum in a pendulum clock.It is a weighted wheel that rotates back and forth, being returned toward its center position by a spiral torsion spring, known as the balance spring or hairspring.
The balance spring is a fine spiral or helical torsion spring used in mechanical watches, alarm clocks, kitchen timers, marine chronometers, and other timekeeping mechanisms to control the rate of oscillation of the balance wheel. The balance spring is an essential adjunct to the balance wheel, causing it to oscillate back and forth. The ...
Mono metallic stainless steel four arm balance with gold eccentric adjusting weights. Invar balance spring with terminal curve free sprung. Independent dead seconds mechanism consisting of an eight tooth star wheel mounted on the fifth wheel arbour advancing a sixty tooth ratchet wheel on an arbour carrying the seconds hand.
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The balance wheel continues clockwise, again free from interference until it is pulled back by the hairspring to the center position. The cycle then starts again. Each back and forth movement of the balance wheel from and back to its center position corresponds to a drop of one tooth (called a beat).
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The balance wheel and spring function similarly to the torsion pendulum above in keeping time for the watch. The D'Arsonval movement used in mechanical pointer-type meters to measure electric current is a type of torsion balance (see below). A coil of wire attached to the pointer twists in a magnetic field against the resistance of a torsion ...