NEST OF BEVELLED WHEELS FOR FOUR DIALS.
These wheels should be rather large, inasmuch as they have to carry the hands moving upon the face of the dial. The size of these wheels varies of course with the size of the clock, but they are seldom less than five inches and are generally from seven to nine inches wide.
HAMMER AND BELL.
The next engraving exhibits the relative positions of hammer and bell in a turret clock,—the hammer being fixed at right angles to the swing of the bell, so that the blow of the hammer should not drive the bell out of reach of its next blow, and this position least interfering with the ringing of the bell, when the bell is required to be rung. The hammer spring, as shown, is sometimes so adjusted as to allow of the hammer being brought nearer or further from the bell.
Hammer and Bell.