Page:EB1911 - Volume 27.djvu/42

Rh Moreover, after the required ad'ustments have been made and the machine started, the travel and the return of the work-table and the feeding of the tool across the surface are performed by self-acting mechanism actuated by the Reciprocations of the table itself, the table being driven from the belt pulleys. V To such a design there are objections, which, though their importance has often been exaggerated, are yet real. First, the cross rail and housings make a rigid enclosure over the table, which sometimes prevents the admission of a piece that is too large to pass under the cross-rail or between the housings. Out of this

FIG. .-20-in. Side Planin Machine. (G. Richards & Co., Ltd., Manchester.) " 43 S A, Bed. G, Tool-box on travelling arm H, travelled byfast and loose B, B, Feet. ' pulleys ] for cutting, and by pulleys K for quick return. C, C, Work tables adjustable vertically on the faces D, D, by means of screws E, E, from handles F, F, through bevel gears. L, Feed-rod with adjustable dogs a, a, for effecting reversals through the belt forks b, b. M . Brickwork pit to receive deep objects.

Z FIG. 44.-8-in. Shaping Machine. (Cunliffe & Croom, Ltd., Manchester.) V A, Base. B, Work-table, having vertical movement on carriage C, which has horizontal movement along the face of A. D, Screw for effecting vertical movement, by handle E, and bevel gears. F, Screw for operating longitudinal movement with feed by hand or power. Tool ram. H, Tool-box. a, W'orm-gear for setting tool-holder at an angie. Crank handle spindle for operatin ditto. Handle for actuating down feed of tool. G. b. C. J, Driving cone pulley actuating pinion d, disk wheel e, with slotted disk, and adjustable nut moving in the slot of the crank f, which actuates the lever g, connected to the tool ram G, the motion constituting the Whitworth quick return; g is pivoted to a block which is adjustable along a slot in G, and the clamping of this block in the slot regulates the position of the ram G, to-suit the position of the work on the table. k, Feed disk driven by small gears from cone pulley. j, Pawl driven from disk through levers at various rates, trolling the amount of .rotation of the feed screw F. K, Conicall fnandrel for circular shaping, driven by worm and whee and con-