Early inventions on Gear Box

All think that Leonardo davince is just a painter.

He is a great scientist also. He had prepared the model of aero plane even before 100 years of its invention. He had also prepared a model of gear box of a car in those days. But his models were of small defects. His gear wheel used to rotate back instead of rotating front. This is corrected by the today’s scientists

In 1834, Vermont blacksmith Thomas Davenport, the inventor of the first gear box.