10/10/2026
Giant pistons, wheels, and axles drive the marvelous locomotives we see today. At high speeds, these gigantic wheels can produce heat past 1,000°F from the friction of all the moving parts- causing damage, fires, runaway trains, and safety hazards. So how do we cool them?
For Today in History, meet Elijah McCoy. The inventor of what we call "The Automatic Lubricator" who passed away today in 1929. This allowed large mechanical systems to stay cool and move with ease via an oil drip application for moving parts. Before this, trains had to frequently stop to cool the parts down. We see and use this on steam engines to this day.
McCoy's "Automatic Lubricator" worked so well and was so popular that people made cheap knock-offs in attempts to imitate the real thing! This led engineers to ask for the "Real McCoy", thus becoming a common term in the industry.
Being born in Ontario, Canada to parents who were previously enslaved, McCoy faced severe racial barriers. Through perseverance, he set off to study mechanical engineering via apprenticeship at The University of Edinburgh in Scotland, and went on to earn 57 patents!
Have you heard of or used the "Real McCoy" phrase? Let us know!