[Fig. 118] is somewhat similar to [Fig. 113], but with a quarter circle mould to hide the joint.
[Fig. 119] indicates the building up of a double skirting mould. C represents the brickwork, A the oak-framed panelling, and B the packing and fixing block. A wide skirting of this type is made in two portions for convenience in working the moulding and to prevent undue shrinkage.
Fig. 116.—Cramping a Tongued and Grooved Mitre.
| Fig. 117.—Working a Groove. | Fig. 118.—Corner Joint with Corner Mould. |
[Fig. 120] illustrates the use of a tongued and grooved joint for fixing together the sides of a corner bracket, and the same method holds good when jointing a corner cupboard. A capping mould or top shelf will conceal the joint; it then has the appearance of a glued butt joint, but is of course considerably stronger. No screws or nails are required if this joint be used.
Ploughing.—When grooves have to be worked in the edge or face of a board to receive tongues, the process is generally called ploughing, and it is usually accomplished by a special tool called a plough (or, as it is occasionally spelt, "plow"). When a plough plane is bought it is usual to procure eight plough bits or blades of various sizes to fit the plane. In [Fig. 121] is given the sketch of a plough plane with the names of the various parts lettered thereon.
| Fig. 119.—Double Skirting Mould. | Fig. 120.—Joint for Corner Bracket or Cupboard. |
The board or boards which it is desired to groove are first planed straight and true, exactly as though it were desired to make a glued or butt joint. One of the boards is now placed edge way up in the vice and with the face side to the worker.