Fig. 2823.
“The core box would, unless the pattern were a small one, be built up in courses, as shown in [Fig. 2823]. The box would be drawn in plan, and end and side views drawn as shown, so as to draw in the half circle representing the bore of the half-core box and mark off the courses as from 1 to 6. These courses need not be of equal or of any particular thickness, but may suit that of any suitable timber at hand. Courses 1 and 2 should extend over the whole outline of the box, while the pieces 3 and 4 are made in width to suit the curvature of the core as shown, and to extend the full length of the box. The pieces 7, 8, 9, and 10 are of the length of the branch, and are made in width to suit the curvature of the branch core. If the branch core were a short one it could be cut out of the solid; but in any event, the grain of the wood should be as shown, and the holding pieces at g and h should be employed.”
Chapter XXXV.—WOOD WORKING MACHINERY.
The machines employed in wood working may be divided into 7 classes as follows:
1. Those driving circular saws.
2. Those driving ribbon or band saws.
3. Those driving boring or piercing tools.