Slide rule workshop AB
João's first mystery slide rule
Brazil made Line Loss and Voltage Drop Calculator
Click images for magnification
Data:
- Copy of the CC Moler Line Loss and Voltage Drop Calculator, where the original texts were translated into Brazilian Portuguese.
- Made in Brazil, probably by hand.
Questions:
- What is the date of manufacture?
After 1925: Charles C. Moller received US patent US1560599, which was applied for in July 1925 and granted in November 1925. David Rance