Читать книгу The Handyman's Book of Tools, Materials, and Processes Employed in Woodworking - Paul N. Hasluck - Страница 44

A more serviceable cramp is illustrated by Fig. 117. A piece of wood A, about 2 ft. 9 in. long, 6 in. wide, by 1 in. thick, is planed up. On each end of this are fixed blocks B, 6 in. long, 1 in. thick, and tapering in width from 4 in. to 2 in. The boards E to be cramped are placed on the appliance, pieces D are laid against the edges of the boards to protect them, and the wedges C are then driven home. These wedges should be about 10 in. long, 1 in. thick, and tapering in width from 4 to 1 1/2 in. The whole of this device should be made of hardwood, except the packing pieces D, which should be deal, so that if too much pressure is applied to the wedges any injury threatening the edges will be taken by the packing pieces rather than by the boards.

Figs. 114 and 115.—Cramp for Thin Work.

Fig. 116.—Rope and Block Cramp.

Fig. 117.—Wedge Cramp.

Fig. 118.—Dog, Round Section.