Vintage Pexto Machinist Drafting Compass
A very nice 9″ steel wing divider caliper manufactured by W. Schollhorn Co from New Haven, CT. There is Oct 17 1905 Pat mark and Dec 5 1905 as the manufacture date. It measures 8 3/4″ inches long with the screw to adjust dividers. This will make a great addition to any vintage tools collection.
The metal divider was used to transfer an exact measurement or scribe a circle. To transfer the measurement put the sharp points at each point of measurement and move the divider to the place where the measurement needs to be transferred. This eliminates any error of measurement. A circle is scribed by putting one point in the center and scratching the surface with the other.