If my understanding is correct it is also called a "slip joint" that
was described in FWW couple of years ago in an article by Frank
Klausz. I made the jig portrayed for tenon cutting.

On Tue, 27 Apr 2004 10:30:12 -0500, "todd"
wrote:


After looking up a bridle joint, that is the correct description of what I
had in mind when I said "tongue and groove". It seems like it will be
relatively easy to make and strong with the large amount of surface area for
glue.