The illustrations show a simple and efficient way of setting up an overhead shaft and fittings for driving revolving cutters as A in Figs. 1, 2, and 3. The uprights B (Figs. 1 and 2) may be of gas piping, the lower ends being fixed to the table and the upper ends having a cross-bar to carry the bearings of the overhead shaft, with drumD (Figs. 1,2, and 3); a set of these supports is required at each end of the lathe. The chief part, however, is the tightening device. This consists of a pulley P (Figs. 1, 2, and 3) and hook with weight C (Figs. 1 and 3). Fig. 3 shows the arrangement clearly. The gut band or belt should be long enough to pass over the drum and pulleys. The weight keeps the band tight in whatever position the slide-rest may happen to be. Fig. 2 shows a modification with a spring E instead of the weight. The lower end of this spring should be fixed to the carriage of the slide-rest. The arrangement with the weight is easier to construct.

Fig. I.

Fig. 2.

Overhead Arrangement for Lathe.