Locomotive Engine Running and Management

by Angus Sinclair

ADVANTAGES CLAIMED FOR THE MOTION.

The first advantage claimed for Joy’s valve-gear over the link-motion is, that it is considerably less costly, and that the working-parts are lighter. The saving is not only in weight, however, but also in the greater simplicity of parts, allowing increased facility for tooling and fitting.

It may be needless to point out how readily this valve-motion is adaptable to the requirements of the typical American locomotive, considerably simplifying the present form of valve-motion, by dispensing with the eccentrics and other working-parts, and bringing the gear with all its strains into a direct line, and also leaving the whole of the under part of the engine clear, and permitting a considerable extension of the fire-box,—a most valuable feature.

All the parts are such that they can be readily made by machinery, dispensing with hand labor except in putting them together.