Lewis Howard Latimer
Inventor and draftsman who improved the carbon filament for the incandescent light bulb
and draftsman who improved the carbon filament for the incandescent light bulb
Why This Person Is Included
Lewis Latimer improved the carbon filament that made Edison's incandescent light bulb commercially viable — his 1881 patent for a longer-lasting filament is the reason homes could be lit electrically at a price that made mass adoption possible. He worked directly with both Alexander Graham Bell (drafting the telephone patent drawings) and Thomas Edison. He is rarely in the version of this story that the public knows.
Historical Significance
Latimer's carbon filament made electric lighting practical for everyday homes. The difference between a bulb that lasts hours and one that lasts months is the difference between a laboratory demonstration and a commercial product. Latimer solved that problem.
The Story
Lewis Howard Latimer was born free in Chelsea, Massachusetts, in 1848, the son of George and Rebecca Latimer, who had escaped slavery in Virginia and become a celebrated abolitionist cause when George was recaptured and eventually freed by Frederick Douglass and others purchasing his freedom. Lewis served in the Union Navy during the Civil War, then taught himself mechanical drawing by studying books from the Boston Public Library and working his way from errand boy to chief draftsman at a Boston patent law firm.
He drafted the patent drawings for Alexander Graham Bell's telephone application in 1876 — one of the most consequential patent documents in American history. He then moved into the emerging electrical industry, working for the U.S. Electric Lighting Company and developing his carbon filament patent in 1881. His improved filament made the light bulb last significantly longer than the earlier versions, making electric lighting economically viable for residential and commercial use. He supervised the installation of electric lighting in New York, Philadelphia, and other major cities.
Edison recruited him to the Edison Electric Light Company, where he became the only Black member of the Edison Pioneers — the elite group of Edison's closest research and development associates. He served as an expert witness in patent litigation for Edison and wrote the first technical book on electric lighting. He died in 1928 at 80.
Sources
- 1.Lewis Howard Latimer. National Inventors Hall of Fame. invent.org↗