Step-by-step explanation:
After studying the inefficiencies inherent in the existing system of oiling axles, McCoy invented a lubricating cup that distributed oil evenly over the engine's moving parts. He obtained a patent for this invention, which allowed trains to run continuously for long periods of time without pausing for maintenance
2.Elijah J. McCoy (May 2, 1844 – October 10, 1929) was a Canadian-born inventor and engineer of African American descent who was notable for his 57 US patents, most having to do with the lubrication of steam engines.