This apparatus is used to demonstrate the potential energy in a wound-up spring and its conversion to electrical energy by driving a dynamo and lighting a lamp.
It may also be used to wind up a weight on a cord, showing the change from potential energy to kinetic and back to potential in the raised weight.
The apparatus comprises of a steel shaft that carries a clock spring with a free wheel device and a winding ratchet, and also an aluminium āVā pulley 56 mm in diameter.
One end of the shaft overhangs the base for use as a line shaft when winding up a weight.
Dimensions=220×100×100 mm high.
This is supplied complete with a driving belt.