A wheel at the drive end of the machine arm, enabling the movement of the take-up lever and needle to be controlled by hand during sewing or, more commonly, when rethreading. Note: Technological improvements have reduced the need for operators to touch the hand wheel during sewing, but the wheel is retained to assist when making adjusti-nents and i-ethreading.
The spring-governed oscillating wheel that governs the timekeeping accuracy of the watch.
a wheel that regulates the rate of movement in a machine; especially a wheel oscillating against the hairspring of a timepiece to regulate its beat
The balance wheel helps to control the escapement and time rate of a watch's movement.
The part of a mechanical watch movement that oscillates, dividing time into equal segments.
A device shaped like a wheel that does for a watch what a pendulum does for a clock (the regulating device).
Most often seen on horse-drawn vehicles, it is a small rotating or stationary wheel normally attached to a front hoof, or a shaft suspended between two horses, and which facilitates passage across the floor.
Oscillating part usually a wheel (with tiny screws specifically mounted around the circumference, so as to compensate for deviations in temperature and humidity) that controls the timekeeping of clocks & watches. (See Platform Escapements)
The balance wheel is the part of a mechanical watch that facilitates even passage of time, analogous to a pendulum in a pendulum clock. The balance wheel rotates in both directions, and its movement is controlled by the balance spring. As the wheel rotates back and forth, the impulse jewel strikes the pallet fork, which in turn allows the escape wheel to advance.
