lso occasionally called a joggle
tenon).--The illustration shows a tenon as used in the interior of a
frame. The tenon is not allowed to run through the stile, and
unsightliness on the edge is thus avoided. This type of tenon is often
used at the corner of a frame, and it then requires to be haunched. A
good workshop method of gauging the depth of the mortise for a stub tenon
is shown in Fig. 129; a piece of gummed stamp paper is stuck on the side
of the mortise chisel, indicating the desired depth of the mortise. This
greatly facilitates the work, as it is not necessary to be constantly
measuring.
A HAUNCHED TENON as used at the end of a door frame is shown at Fig.
130.--In this case it will be seen that the width of the tenon is
reduced, so that sufficient timber will be left at the end of the stile
to resist the pressure of the tenon when the joint is driven together.
The short portion (A) which is left on the tenon is called the haunch,
and the cavity it engages is termed the haunching. The haunch and
haunching prevent the two pieces of timber lipping, or becoming uneven on
the face side, as would be the result if it were cut away entirely up to
the shoulder.
Fig. 131 shows the type of tenon and haunch used when the stile or
upright rail is grooved to receive a panel. In this and similar cases the
haunch is made the same width and the same depth as the groove; the
groove therefore acts as the haunching. An application of this joint is
shown in the top rail of the door frame, Fig. 132.
[Illustration: Fig. 129.--Method of Gauging for depth of Tenon.]
[Illustration: Fig. 130.--Haunched Tenon used at end of Door Frame.]
[Illustration: Fig. 131.--Haunched Tenon used when Stile is Grooved for
Panel.]
[Illustration: Fig. 132.--Application of Haunched Tenon Joint to Door
Frame.]
[Illustration: Fig. 133.--Occasional Stump Tenon.]
This type of joint is also used to connect the rail to the leg of an
ordinary kitchen table (see Fig. 167).
Fig. 133 is a variation of the stump tenon, occasionally used where the
work in hand demands a thin tenon and a stout stump to take heavy
strains.
[Illustration: Fig. 134.--Joint for Inside Framing.]
[Illustration: Fig. 135.--Haunched Barefaced Tenon.]
A joint used for inside framing is seen at Fig. 134. The rails may be
used as shown, but in the case of a door frame (as Fig. 132) they would
have the inside edges grooved to receive the panels; the tenons would
there
|