He invented the lubricating cup so every few miles the train didn't have to stop it automatically dispersed the oil where needed. He invented the lubricating cup so every few miles the train didn't...
McCoy invented an automatic lubricator for oiling the steam engines of locomotives and boats in 1979 mccoy invented an oil-dripping cup for trains
What is the name of Elijah Mccoy's invention?
So steam engines on locomotives and boats can go faster and they wont have to stop. duh