[Fig. 111] is a "Combing or corner locking" joint, a method of making boxes by means of a continuous use of tongues and grooves instead of dovetails. This type of joint is generally machine made. The amateur, however, who is not proficient to undertake a dovetailed box frequently uses this method.
| Fig. 110.—Corner of Barred Door. | Fig. 111.—Combing or Locking Joint. | Fig. 112.—Single Loose Tongue and Double-tongue Joint. |
Corner Joints.—[Fig. 112] shows both a single loose tongue and a double solid tongue. Both are methods used to connect circular cornered work, such as a counter end, to the front framing.
[Fig. 113] indicates a tongued and grooved joint suitable for edge or end jointing, such as fitting matchboarding round a chimney breast, making small jewel drawers, etc.
[Fig. 114] is a tongued and grooved joint with a bead worked on same to hide the joint, sometimes called a staff-bead. It would be used in positions such as boarding around an upright iron pillar, etc., the bead giving a neat finish at each corner.
[Fig. 115] is a similar joint, but at an obtuse angle. An example of its use is in fixing boarding around an octagonal column of brickwork.
| Fig. 113. | Fig. 114. | Fig. 115. |
Examples of Tongued and Grooved Corner Joints.
[Fig. 116] shows a tongued and grooved mitre as used for strengthening the corners of cabinet work, such as tea caddies, small boxes, plinths, etc. Two pieces of wood are glued in position and allowed to set prior to glueing and cramping the joint proper. These pieces are afterwards planed away, thus leaving a clear surface to the box sides.
[Fig. 117] shows the method of working the groove in the above joints. The pieces are turned back to back, the mitres thus making a right angle. The guide on the grooving plane thus works against each face of the joint, and this ensures correct jointing.