The Epicyclic gearbox was devised in 1781 (as a sun and planet gear) by James Watt for use in conjunction with his steam engines. The concept was adopted in 1902 by Sturmey and Archer for a ...

AMONG the last group of exhibits in the Inventions Exhibition is the new epicyclic gearing invented by Prof. F. Soddy, the main object of which is to provide for the transmission of large powers at ...

In bicycles, gears are required to couple the cyclist's output to the motion of the rear wheel. A selection of gear ratios is desirable to maintain a good impedance match between the cyclist and the ...