The Lathe & Its Uses / Or, Instruction in the Art of Turning Wood and Metal. Including a Description of the Most Modern Appliances for the Ornamentation of Plane and Curved Surfaces. With an Appendix, in Which is Described an Entirely Novel Form of Lathe for Eccentric and Rose Engine Turning; a Lathe and Planing Machine Combined; and Other Valuable Matter Relating to the Art.

by James Lukin

L. Large wheel of 96 teeth driven by the pinions and wheels U, I, J, K, and forming the foundation plate of the third part, M, which carries the nose of the chuck.

N, N. Self-adjusting radius plates for carrying the various change wheels.

O, P. The eccentric slides of the first and second parts.

[Fig. 2] shows the arrangement of the driving wheels and pinions on the back of the chuck.

The working of the chuck is as follows:—

If the pinion E has 20 teeth, and is geared direct into the wheel H, by means of an intermediate wheel, it will give six loops inwards if the motions are similar, and outward loops if the motions are contrary.

If the wheel H is driven from the pinion G it will give 12, 24, or 48 loops.

Pinion of 24 teeth will give 5, 10, 20, or 40 loops.

Pinion of 30 teeth will give 4, 8, 16, or 32 loops.

Pinion of 40 teeth will give 3, 6, 18, or 36 loops.