Square

[Papaw]

An acquaintance of mine has this square and is seeking info. I haven't seen it myself, but he says it has no maker's marks. It has holes on the arm that look like they are for a carpenter's pencil. Perhaps for layout, or marking an arc or circle.

[geneg]

Seldom if ever find maker's marks on one of these.   Very common carpenter's tool & predecessor to speed squares.  The diamond shaped holes are for a carpenter pencil.  Never used one for an arc myself, but marked rip or offset lines on boards.   

[wrenchguy]

Mortise/tendon layout 4 post/beam construction.

[Papaw]

Got a quick answer from Kirk Eppler  on Facebook- Seen in a Southington Hardware catalog from 1930. Called a scribing square.

[jdjax]

I used to have that same type of square. I know it had numbers stamped on it for the holes I think they were whole numbers with fractions at every hole, so if you put a pencil in the 1"1/8" hole you could scribe a line 1"1/8" from the edge of the board.
Mine did not have a makers mark either but it was very handy to use and surprisingly still square being made out of lightweight steel.

[jdjax]

It is hard to tell from your picture but it looks like the end of the rule part of the square has a radius on one side and mine had that as well. I thought some knuckle head had stuck it into a grinder.

[Papaw]

This is the picture of the page the square is on. I don't see the radius on one side.

[lptools]

I can see drawing a circle, using any slot, or a spot in the oval on the head as your center point. Place a pencil at the desired radius, whether it be a slot, or the edge of the square. Not the most convenient way to draw a circle, but would work in a pinch. Regards, Lou

[Yadda]

... I don't see the radius on one side.

Is the inside corner of the arm rounded?

[jdjax]

Thanks for that Papaw.