caption: The image shows a black and white drawing of a machine with a pendulum, which is a mechanism used to control the flow of electricity. It consists of a cylindrical object with a handle on one side and a spindle on the other, connected by a series of wires and cables. The pendulum is connected to a motor, which powers the machine, and the wires are connected to the spindle. The diagram also shows the various components of the machine and how they interact with each other.