The lines drawn upon pattern work require to be very fine, and for this purpose the cutting scriber, [Fig. 2764], is employed. The end a is bevelled off on both sides like a skew chisel. The end b is ground to a fine point and both ends are oilstoned. The point end is for drawing lines with the grain, and the knife end for lines across the grain of the wood. The wooden handle is to afford a firm grip.
Fig. 2765.
In [Fig. 2765] we have the cutting gauge, in which a steel cutter takes the place of the marking point, being wedged in position. It is employed to cut thin strips of wood, that is to say, of thicknesses up to about a quarter of an inch. The cutter point should be tempered to a dark straw color.
The principal forms of joints employed by the pattern-maker are as follows:—
Fig. 2766.
[Fig. 2766] represents the mortice and tenon, the thickness of the tenon being one-third that at c, which leaves a thickness at e and d equal to that of the tenon. When the mortice is away from the end of the work the breadth b of the tenon is made less than the breadth f of the work so as to leave stuff at a to strengthen the mortised piece. To make this joint the two pieces, having been planed or otherwise made to size as required, are marked for the position and length of the mortice in one case, and for the length of the tenon in the other; both pieces are now gauged with a mortice gauge, both being marked alike; and then from the face side we mark a tenon or mortice of the dimensions required.