The accompanying illustrations show a bench with a small circular saw driven by means of two toothed wheels turned with a hook-handle. In addition to the toothed wheels, a shaft carrying a flywheel F (Fig. 1) is shown. The momentum of this wheel will greatly assist in the turning of the handle. As the saw cannot be driven at a very high speed, the feed speed must necessarily be slow; a saw up to 8 in. in diameter will be quite large enough for such limited power. A higher speed could be obtained by having a greater number of toothed wheels and arranging them diffeiently, but this would mean a loss of power. In Fig. 2, which is a plan of the frame of the bench, wheels, etc., in position, T is the large toothed wheel, 2 ft. 6 in. in diameter, geared in a pinion P, 2in. diameter, which is keyed to the saw spindle S. This pinion gears in another pinion, or small toothed wheel P', 4 1/2n. in diameter, on the flywheel shaft H. On the end of this shaft the flywheel F, 1ft. 3 in. diameter, is keyed. This wheel should have a fairly heavy rim. W is the saw, and B the bearings in which the saw spindle and wheel shafts run. The hook handle K is secured to the end of the shaft that carries the large toothed wheel. Fig. 1 is a side elevation of the bench complete; B is the bench, which may be about 2ft. 6in. from floor to table, and T is the large toothed wheel. The speed of pinion P will be fifteen times the speed of the large toothed wheel T.

Circular Saw Bench.