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 ...

As shown in the picture, a planetary gear, also known as epicyclic gear, consists of three parts: a central sun gear, planetary gears moving around the sun gear and an outer ring with inward ...

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 ...

The length of the chain is determined by the spacing between the chainwheel and the sprocket, as well as the nature of the gear system. A derailleur system requires a longer chain than an epicyclic ...