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Improvement in Lubricators for Steam-Engines (Patent No. 129,843)

Elijah McCoy

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1872

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Innovators

3-Minute Summary

McCoy's automatic lubricating cup for steam engines allowed locomotives to be lubricated while in motion, eliminating the need to stop trains for oiling. He held over 50 patents; the phrase 'the real McCoy' is attributed to engineers who insisted on his authentic device over inferior imitations.

Why It Matters

McCoy's invention transformed railroad efficiency and safety. His patent is the primary document of an innovation that shaped American industrial development — and whose inventor was systematically denied the credit he deserved.

Where to Read

USPTO Patent Full-Text Database (free)

Verified: USPTO

Key People

Elijah McCoy

Key Policies & Events

Patent lawRailroad industry standardsIndustrial labor