The Young Mechanic; Containing Directions for the Use of All Kinds of Tools, and for the Construction of Steam Engines and Mechanical Models, Including the Art of Turning in Wood and Metal - Paperback

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: with eight spots round it. These are nail heads, and mark the position of eight nails driven round but not touching the frame into the beqch. Then, having prepared eight small wedges, drive them in between the frame and the nails. You will find this as simple and easy a way of keeping the frame together as any, and all must remain till the glue is dry and hard?probably till the same hour on the following day ? Then remove the wedges and take up your frame, which should be trim and strong. Nevertheless, you are now to add considerably to the strength of it in one or both of the following ways. With a mitre-saw or tenon-saw cut one or two slits at each angle, as seen at D, Fig. 32, e andy. Cut little pieces fc/ i/N, Fig. 82. of thin wood, and having glued them, drive them into these slits. If you saw them slanting, some tending upwards id some downwards, it will be better than cutting straight to the frame. Then, when all is dry, neatly trim offthese pieces even with the frame. You may also, if the work is of a more heavy kind, as a large picture-frame, finish with keyed mitres, g. Cut a place with a chisel of the shape here shown, about one-eighth of an inch deep, half into one piece and half into the other. Then cut out a key of the same form of thin hard wood, to fit exactly, and glue it in. The shape of the key prevents the joint from coming apart, and makes it very strong and durable. A very large number of light boxes are made with mitred joints, as workboxes, water-colour boxes, compass-boxes, and such like; and you can examine these for yourself; but you will not often see the keys at the angles, because most of such boxes are veneered, or covered when finished with a thin layer of some ornamental wood. I shall now proceed to show you how these joint...