PATTERN MAKING 



77 



two halves would each be If X 3f X 8| inches. Having fitted the 

 two iiisides accurately together and dressed one edge of each 

 straight and at right angles to its face side, with the marking 

 gauge, draw a center line on each, not only on the face but also 

 across each of the two ends, Fig. 151. Across 

 the -center of each piece draw, with a sharp- 

 pointed knife and try square, a second line at 

 right angles to the first and at equal distances 

 from each end of the block. With dividers 

 adjusted to 1^ inches, place one leg at the inter- 

 section of the two lines, and on the gauge line 

 mark two dots, each 1-g inches from the center Fig. 151. 

 line. These dot are the centers for the dowels which are to 

 connect the two halves of the pattern after it is finished. Bore 

 the holes in each piece ^ inch deep with a -f$ inch auger bit, 

 and cut the dowel pins only inch long, gluing them into 

 the holes of one piece and giving a projection of \ inch to 

 fit in the holes of the second half of the pattern. Although the 

 dowels are glued into the first half they must fit easily, but not 

 loosely, in the second, and should be rounded 011 the ends or made 

 cone shaped, as in Fig. 152. 



Having fitted and prepared the two blocks with their dowel 

 pins, carefully glue them together using only a narrow strip of 



Fig. 152. 



Fig. 153. 



glue \ inch wide on each end of the block and clamping the two 

 together with a hand screw on each end. When the pressure of 

 the hand screw is applied, the glue will spread inward to inch 

 or 1 inch. Great care must be taken not to use too great a quantity 

 of glue, or it will spread in far enough to bind the two halves of 

 the pattern together so that they cannot be separated when turned 

 and finished. The blocks should remain in the hand screws, after 



