Roll Feed Circular Saws

Figs. from 3102 to 3105 represent a roll feed circular saw, by J. Richards.

Fig. 3102 is a side elevation, Fig. 3103 a plan, and Fig. 3104 a cross-sectional view through the rolls.

In Fig. 3102, p is the saw-driving pulley, t a stand for carrying the saw guides a, b, c, d, which are adjustable for height by means of the arm whose set screw is shown at u; at w is the spreader for opening out the board after it has been cut by the saw, and thus prevent its binding against the saw and heating it.

The construction of the feed motion is shown in Figs. 3103, 3104, and 3105.

On the saw arbor is the feed cone c, Fig. 3103 having four steps so as to give four rates of feed. This cone connects by belt to feed cone d, whose shaft drives feed pulley e, which drives f by belt connection. f drives two worms shown by dotted lines at h and i, and these drive the worm wheels which drive the feed rolls, one of these worm wheels being shown at k, in the side view, Fig. 3102.

The feed roll l (Fig. 3103) is supplemented by a fence or gauge face p, which guides the work closer up to the saw than would be possible with a roll, and a supplemental roll is provided at m, thus affording a guiding surface for the work from m to the end of p. The stand for guide roll l fits in a slideway, and is adjustable along it by means of the screw s. Similarly the stand for roll n is fed along its slideway by screw r. There are three separate sets of saw guides, all of which are shown in the plan view Fig. 3103, and of these the top ones, a, b, c, d, e, f, g, and h are adjustable by nuts. The front ones, l, m, n, o, p, q, and the back ones, i, j, k, and r, s, t, are adjustable by means of the wedges w. At z is a wedge for adjusting the spreader w so as to keep it close to the saw whatever the diameter of the latter may be.

Fig. 3105 is an end view of the machine showing the feed worms h and i, and the belt tightener v, which is carried on the arm u on whose shaft is the weight y, attached to which is the handle x.