Lewis Latimer (1848 – 1928) – Carbon filament for light bulb
Born in 1848 to formerly enslaved parents, Lewis Latimer was fortunate enough to land a job at a patent law firm after the Civil War, where he fought on the Union’s side. At the firm, he provided valuable invention design help as a draftsman whose drawings of machinery, mechanisms, and various inventions determined whether any patent application would be approved or denied. A skillful draftsman of his time, Latimer was employed by Alexander Graham Bell to draw the draft for the telephone design for which Bell received the patent in 1876.
While working as a draftsman and assistant manager for the U.S. Electric Lighting Company, he improved the process of making carbon filament for light bulbs so that it might last longer and be cheaper to produce. The filament was even more effective than Edison’s design, and in 1884, he was invited to work with Thomas Edison himself. He was the first person of color to be included in the exclusive Edison Pioneers organization. Latimer also invented a precursor to the modern air conditioner known as “an apparatus for cooling and disinfecting,” locking umbrellas, improved train bathroom design, a lamp fixture, and a device called “book supporter.”