Laboratory Commutators
Commutators were used as simple forward-off-reverse switches for electrical experiments in physics laboratories. There are two well-known historical types :
Read more about this topic: Commutator (electric)
Famous quotes containing the word laboratory:
“We are able to find everything in our memory, which is like a dispensary or chemical laboratory in which chance steers our hand sometimes to a soothing drug and sometimes to a dangerous poison.”
—Marcel Proust (1871–1922)