Yes Ted... and I learned something from YOU! I never heard of the term "Pantograph" but just googled it, and you hit the nail on the head! When I saw this in an antique store I knew it would have been used for copying and CHANGING the SCALE of one drawing or photo to another. Contour lines, Aerial Photos, Charts, all kinds of applications... and before the days of xerography and CAD it all had to be done with mechanical devices. I just never heard the term Pantograph until your post. Very Good! I have been in IT serving engineers and architects my whole life, and all the old ways [tools] of communicating over distances, and doing survey and design has always interested me. My collection of such "stuff" is much smaller than it once was.
Thank you for enhancing my vocabulary tonight! And helping me put a name to my little machine in my collection! I knew what it did, but did not know what it was called!