1956 GE Carboloy Machinability Computer

[Billy Bob]

I am in possession of 1965 GE Carboloy Machinability Computer. This analog computer was designed by Dr. William W. Gilbert. It was used until the late 80's to calculate "Nineteen machining variables such as Cutting speed, feed, tool life, metal removal rate and horsepower can be accurately determined through use of the computer" (GE Carbology Machinability Computer Manual No. MC-101A. It is purely analog and works on the Wheatstone bridge principle of balance loads through a +- ma meter located in the panels center. Is anyone else interested in these older analog computers?