Drives,
Your NuTyp was made after 1930.
This one has the "Cylinder Jaws" for which Fulton was granted Patent #1890114 on 6 Dec 1932. He filed for the patent 29 Aug 1930, so figure he could have developed this shortly before then. Fulton seemed to understand the patent system very well, so I doubt there was much, if any, lag time from concept to patent application.
I have attached your image with jaws in question circled in Arrest Me Red.
From Fulton's patent: (Complete with errors due to Google's OCR.)
Up until a short time ago, vises merely consisted of jaws of work holding means, adapted to be closed together, and to hold an object between them. As the faces of the jaws were usually arranged parallel, it was quite obvious that round bodies, such as pipes, cylinders or disks could not be held between such jaws.
The next improvement was the addition of pipe jaws, as an auxiliary to the fiat, or machinist jaws, and while such pipe jaws serve to hold pipes or cylinders in one position, still there was something lacking to make a vise complete and efficient.
In this invention, I have provided an additional pair of jaws or work holding means designed for the purpose of holding disks or cylinders, and therefore the vise which I have shown, and which I will describe, has three distinct pairs of jaws, all operated from a single source, and so proportioned that the effect of closing of any pair of jaws will not be in any way hampered by the premature closing of any other pair of jaws.
Are there any markings on the other side of the vise? Turning it around may be incredibly revealing...
1932 would have been the INT period, after 1935? or so, it could have been Sawyer or something between INT and Sawyer, or ????.
JKB
