Fig. 285.
[Fig. 286] shows the mechanism, called the link-motion, employed to reverse an engine, or to enable it to be run in either direction. Many forms of link-motion have been devised, but the Stephenson form, as shown in the figure, is, however, the one in almost universal use.
Fig. 286.
This drawing shows shading and the mode of figuring the parts for identification.
Fig. 287.—Fig. 288.—Fig. 289.
[Figs. 287 to 289] represent a bumping-post for the end of railway tracks, reproduced on an enlarged scale from the columns of the Engineering News.
In addition to the lettering and dimensions, admirably shown in the drawings, the following description is appended to show how printed text and mechanical drawings mutually aid in practical—or commercial—usage.
The unique feature of the arrangement shown, is that the center line of the post does not coincide with the track, thus adapting itself to the nature of the blows of a car-bumper, as received in the single-post style of the mechanism.