TO DRAW WIRE AND SMALL TUBING.
Figure 30.
Figure 31.
Cut a piece of copper the length required, having the width about three times the diameter of the tube that is to be made. The edges must first be made parallel by filing. In a block of maple or some hard wood, with a wood file, make a groove as shown at [Figure 30]. Place the strip of metal over the groove and, with a somewhat pointed hammer, drive the metal into it until it takes the shape of a V. [Figure 31 A]. Then place it on the flat part of the block and strike on the edges with the hammer, turning them in until they meet, as at B and C.
Figure 32.
A draw plate is then placed in the vise, [Figure 32]. After pointing the tube a little, the end is placed in one of the larger holes and drawn through. This will bring it somewhat into shape. Repeat this operation by drawing the tube through the hole the next smaller in size and so on till the tube is of the diameter required.
Wire may be drawn in the same way. Rectangular, triangular and square drawplates may be obtained as well as circular ones.