Multiplying Dividers: Four New Additions

 So far in 2023 I've added four items to the collection. The first pictured below is a pair of calipers with a number of interesting featurres. The thumb screw at the top loosens the hinge joint and frees the legs to move. The right-hand leg has a fine adjustment mechanism I've not seen before.

The tool is marked in script "Perrot" and "Wurttemberg" so it is likely of German origin, but I've found no information on Perrot who I assume are the makers. Also marked on the left leg is "U.S.A. Patent applied for"  though I've not found any evidence that a US patent was issued. I'd appreciate any insight readers could provode.

The second is a clasic pair of 12 inch, three leaf hinge, wing dividers. It has decorative chamfering and enlarged hip bosses for the wing as well as evidence of file work. It is a finely made tool.

  

 

The dividers are marked "T. Hesson Bruch & Co.". The company is noted for its quality straight razors. The family moved to Philadelphia in the mid 19th. century and imported stock from Europe It is likely of German origin given the high quality of its production.

Next is a 5 1/2 inch pair of "school compasses" from the American Lead Pencil Co., New York, model #850. This was called the "Combination Pen and Pencil Compass and Divider" as inserts in the legs can be inverted for different functions These were likely produced between 1885 and 1910. The spring hinge and adjustment wheel above the hinge are uncommon for this type of tool. These are also marked "PAT APPLD FOR"

Finally, a little pair of 3 in. outside-inside self-registering calipers. They are marked "Pat'd Jan 26 64". This 1864 patent was issued to William H. Morse. The patent drawing is quite different from this final product.

The side shown (with a marked"O") has a scale above the hinge that shows outside diameter. If the lower legs bypass, the reverse side (stamped "I") has a scale for inside diameter. There is no indication on the tool or in the patent who the manufacturer was.