Model: 060 Oscillating Into Intermittent Circular Motion
The rotation of the crank arm, which is attached to the driving shaft, gives an oscillating motion to the connecting rod, at the other end of which is another crank arm pinned to the center of the rotating disk. If it engages the drum, the resulting motion is intermittent and clockwise.
[Virginia Downward & William M. Clark, 1930]

[Editor’s Note: This Boston Museum of Science model has been modified from the original Clark model in the Newark Museum. The editor has had to modify the original 1930 description to fit the current working model. The basic concept here is that of a kind of friction clutch consisting of an oscillating pawl that rests on the inner circumference of the large cylinder. Moving the pawl to the left locks the pawl and cylinder producing clockwise motion, while moving the pawl to the right produces slip and no motion of the cylinder. There are several friction-pawl clutches in the Reuleaux collection in the Z series of models. FCM]

Francis Moon 2005-00-00

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