[Fig. 21] shows the application of butt or glued jointing to the building up of the core of a piano fall previous to shaping up and veneering.
[Fig. 23].—Laminated work—the building up of circular rims for cabinet and joinery work. Plan and elevation show rim pattern of a pulley as used in the pattern-making trade.
Fig. 27.—Cramping Glued Joints: Handscrews and Batten shown at left; temporary Batten at right to keep the wood flat.
[Fig. 24].—The glueing of a ploughslip to a drawer side is seen here, the ploughslip being used to carry the drawer bottom.
[Fig. 26] shows the method of jointing with shooting board and trying plane; the right hand operates the plane whilst the left hand holds the wood firm upon the shooting board.
Owing to the importation of narrow and faulty timber the necessity of jointing is greater to-day than ever it was, wide timber of course meaning higher cost for raw material.
The method of using iron dogs is illustrated in [Fig. 25], and it will be observed that owing to the wedge-like formation of each fang (see enlarged sketch) the dog exerts the necessary pressure to close the joint. At the centre of this illustration is suggested the home-made hardwood blocks, baseboard and wedges referred to on [page 4].
[Fig. 27] shows how the iron sash cramps are used to apply pressure to the joint. As this method is in some cases apt to bend and distort thin boards it is wise practice to fix (as a temporary measure) a stout piece of straight wood on to the board to be joined by using two handscrews as shown at the left hand of the illustration. At the right hand of the sketch a wooden cramping arrangement of the box type is given, and by wedging up the boards are closed together. It is obvious that if this type of box cramp be used it will prevent the boards buckling and the handscrew method at the left may be dispensed with.