Full Chisel Blog

November 25, 2013

Interesting Brazilian Rosewood 3 beam marking/mortice gauge – C. Sholl, Pat’d March 6, 1864

A friend of mine picked this up at a local swap meet and I don’t think he gave too much for this Brazilian Rosewood 3 beam marking/mortice/tenon gauge.  Here is a link to Christian Sholl’s Patent.  It is American made and Sholl also patented a 4 beam marking/mortice gauge and some of these are actually made and judging from the prices are quite rare.


I have seen a lot of marking gauges in my time, this one is up there in curious designs.  I fiddled with this for a while and it is most difficult to set, the mortice slide adjusts easy enough but getting all three sides in the correct position is a handful.


This view shows the triple beams and the pentagonal shape.


It has several round brass discs on the opposite side of the fence for wear, two are missing.  It is brass mounted with iron screws and iron/steel scribing pins.



1 Comment »

  1. Nice gage. I’ve been looking for one of these for some time, but I’m only willing to pay bottom-feeder prices (well under $100), which greatly limits opportunities. If I recall correctly, Patrick Leach wrote that the 3-stem is actually less common than the 4-stem. Most sellers don’t know that, so price per-stem. It certainly looks like an awkward tool to set up; the Stanley #65 and similar are my favorites for daily use, since they’re virtually idiot-proof.

    Comment by Adam Maxwell — November 25, 2013 @ 3:30 pm

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