most of the places I worked didn't have computers yet. we drew by hand.
I did work at a place that had CAD/CAM
I had no training with that system so I didn't do very well. I still had the option of drawing by hand there, though.
If you ever get hold of a Drott manual with the exploded picture of the Feller Buncher in it. I drew that by hand.
Our Packers just won a squeaker . O.T.
......jiminwisc......
Would either of these be it?
https://www.google.com/patents/US3727653
https://www.google.com/patents/US4823852
Very interesting that we have 2 drafting pro's here. I was a Manufacturing Engineering - military aircraft. I remember when we first began using computers.... I took one CADAM and one NCAD class -- can't say I was very good at it.