Ray L. Southworth
A device that has proved to be very useful and prac" tical, also a formidable rival of the grindstone or emery wheel when these are not available, is shown in the drawing.
An emery stone, preferably a coarse one, is mounted on a movable piece, and a tool holder may hold the tool upon the stone, as the latter is moved to and fro, or the tool or piece to be ground may be held by the hands. A spring or weight may be attached to give the necessary pressure when a tool-holder is employed.
Referring to the drawing, we see that the device consists of an emery oil stone A, mounted upon a piece of hardwood C by glue, and sliding between two narrow pieces of maple or other hardwood D, obtained by sawing a piece through the middle. By using a piece of matched flooring, split in the center, the necessary tongues and grooves are obtained without having to make them. The pieces DD are screwed to another piece, which forms the base. To move the mounted stone to and fro an arm E extends from C to a wheel G, having a screw or metal pin holding E. Upon the shaft with G is a grooved pulley of wood upon which a belt may run, or the pulley may be placed outside the outer bearing and a crank handle attached to it.