Model: 005 Belt Drives
Machines are of two kinds—the driving and the driven. Some driving machines are steam and oil engines, electric motors, and water wheels. Examples of driven machines are lathes, drills, planes, and saws. Some connecting link or means of transmission between the two is necessary. A common method is to use belts, chains or cogwheels. By twisting a flat belt half way the shafts may be driven at right angles if the belt rotates as indicated in this specific arrangement. In order to make belt track, center of upper pulley must be in line with right edge of lower pulley. In model 2 reversed motion is obtained by giving the round belt a half turn; and model 3 shows belt in straight line drive with pulleys rotating in same direction.
[Virginia Downward & William M. Clark, 1930]

[Editor's Note: When the above description was written in the 1930's, belt and pulley drives were common in many industrial and shop environments. Today most machines are driven directly with motors or engines. However, belt and chain drives are still used in bicycles and in some robotic systems and may be found in automobiles driving the fuel pump, cooling fan and alternator. Large scale applications are found in ski lift and mountain passenger cabin transport systems. Models of belt - pulley combinations may be seen in the Cornell Reuleaux Collection on KMODDL, in the model series V1- V12. FCM]

Francis Moon 2005-00-00