Part 2 (1/2)

[Ill.u.s.tration: Fig. 41.--Tee Halving Joint.]

The joint lettered B in Fig. 28 is a ”Cross Halving Joint” where each piece runs through the other. Fig. 39 shows this joint separated, and Fig. 40 shows a similar joint separated where the joint is made edgeways.

Fig. 41 shows a ”Tee Halving Joint” with a dovetail cut on the edge. This is seldom used except as a woodwork exercise.

Fig. 42 is a ”Dovetailed Halving Joint” used for lengthening timber, and is also a favourite Manual Training model. It might also come under the heading of scarf joint, although rarely used in actual practice as such.

As a practical woodwork exercise it calls for accurate marking out and careful fitting.

[Ill.u.s.tration: Fig. 42.--Dovetailed Halving Joint used for Lengthening Timber.]

[Ill.u.s.tration: Fig. 43.--Dovetailed and Halved Joint.]

[Ill.u.s.tration: Fig. 44.--Dovetailed Halved Joint with Shoulders.]

Fig. 43 shows a combination of a halved joint dovetailed edgeways, whilst Fig. 44 shows a dovetailed halved joint with the shoulders housed. This latter is seldom used in actual work.

At Fig. 45 we have the application of halving joints when constructing a barrow wheel. The centre portion is an example of three pieces half-lapped or, as it is sometimes called, one-third lapped. A sketch of the three pieces separated is shown at L, B, C, Fig. 46.

This joint is extensively used in the pattern making trade for lap-jointing the arms of pulley patterns, etc. It is probably the most difficult of the halving joints to mark out and construct with the desired degree of accuracy.

[Ill.u.s.tration: Fig. 45.--Halved Joints on Barrow Wheels.]

[Ill.u.s.tration: Fig. 46.--Detail of Halved Joints in Fig. 45.]

Fig. 47 shows a combination of a bevelled dovetail half-lapped joint.

This is only used as a puzzle joint. When neatly constructed and glued together it is apparently impossible to make it, showing as it does a half lap on one side and a dovetailed half lap on the reverse side.

Fig. 48 is the end view of a kitchen table with drop leaf, showing the skirting board scribed to the solid side. A table of this type is fastened to the wall with two iron holdfasts which engage the ends of the table. The hinged bracket frame shows the application of the halving joint to bracket supports for this and similar purposes, such as brackets to support shelving, etc. In this example the hinged brackets turn underneath the table top, and allow the leaf to drop out of the way when not required. The dotted lines show the position of a shelf for boots and shoes.

[Ill.u.s.tration: Fig. 47.--Bevelled Dovetailed Half Lap.]

[Ill.u.s.tration: Fig. 48.--Bracket of Drop Table.]

[Ill.u.s.tration: Figs. 49 and 50.--Separate pieces of Halved Moulded Joint.]

[Ill.u.s.tration: Fig. 51.--Oblique Cross Halving Joint.]

[Ill.u.s.tration: Fig. 52.--Manual Training Halved Exercise Joint.]

[Ill.u.s.tration: Fig. 53.--Exercise Dovetail Joint.]

[Ill.u.s.tration: Fig. 54.--Carpentry Tie Joint.]

Figs. 49 and 50 indicate the halving of cross pieces which have their edges moulded; the pieces are shown separately, the moulding being omitted to give a clearer representation of the method of construction.

[Ill.u.s.tration: Fig. 55.--Cross Halving Joint with Housed Corners.]

[Ill.u.s.tration: Fig. 56.--The parts of Fig. 55 shown separate.]

Fig. 51 is an ”Oblique Cross Halving Joint” where the two pieces are not at right angles. A plan and elevation of the joint are shown at the left, whilst a sketch of one piece of the joint is given in the right-hand ill.u.s.tration.