He invented a toilet system for railroad cars in 1873, referred to as watercloset for railroad cars. He also invented an electric lamp with an inexpensive carbon filament and a threaded wooden socketfor light bulbs.
He supervised the installation of carbon filament electric lighting in New York City, Philadelphia, Montreal, and London.
He was responsible for preparing the mechanical drawings for Alexander Graham Bells patent application for his telephone design. Lewis Latimer had the distinction of being the only African American member of the Edison Pioneers, a member of Thomas Edisons engineering division of the Edison Company.
He joined the Edison Electric Light Company in 1884 and conducted research on electrical lighting. In 1890 he published Incandescent Electric Lighting, a technical engineering book which became a guide for lighting engineers.
For years he served as an expert witness in the court battles over Thomas Edisons patents. At the time of Latimer s death in 1928, the Edison Pioneers attributed his “important inventions” to a “keen perception of the potential of the electriclight and kindred industries.” Lewis Latimer invented the carbon filament for electric lighting, replacing the too-fast burning paper filament of Thomas Edison.
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