Id old unusual? Blanchard grooving compass

[AKortekaas]

Hi, i picked this up second hand years ago.
it's obvious that it's some kind of grooving compass but i am puzzled by the curved end on one of the legs. is it used to cut a groove ? It is close to being sharp and one size has a nick in it so i assume it was sharp once but i may be wrong.

Even without knowing how to use it exactly, it makes very nice straight lines

It is stamped with "Blanchard Paris" does this mean its from before Blanchard started working with other people; 1830-1840 ish ?

 

[Samalan]

That's a very nice tool you have I don't know anything about Blanchard but I would use that baby good luck with it and have fun.

[jcuk]

Its a old compass race use for cutting a slight channel for stitching think most use a stitching groover these days 

https://www.fenlandtools.com/product-page/saddler-s-compass-race 

https://www.abbeyengland.com/economy-screw-race-g--race--screw  Another kind of race 

https://www.abbeyengland.com/economy-double-race-g--race--dbl

https://www.abbeyengland.com/economy-single-race-g--race--sng

Hope this helps

JCUK

Edited January 8, 2022 by jcuk

[AKortekaas]

So my suspicions were correct, thanks!

[jcuk]

No worries just added two more. 

[AKortekaas]

nice.
just sharpened mine carefully with some 1200 grit paper and it's a beast!

[DrmCa]

I hazard guess that it may be used rather for marking parallel lines the length of the width of the feet, like for parallel oblong holes.