Granville T. Woods

Early life

Granville T. Woods was born on 23 April 1856. Most biographies place his birth in Columbus, Ohio, but his origins are not fully settled. The American Physical Society notes that Woods himself sometimes claimed to have been born in Australia, likely to gain standing and distance himself from American slavery, and some accounts still repeat that claim.

He left school young, around age ten according to the New York Transit Museum, and learned his trade in machine shops, steel mills and on the railways, where he worked as an engineer. He read about electricity on his own, sometimes having friends borrow library books that libraries would not lend to Black patrons. Accounts that he studied engineering formally in New York in the late 1870s appear in some biographies, but historian Rayvon Fouché, author of Black Inventors in the Age of Segregation (2003), considers them unproven.

Inventions

By the early 1880s Woods had settled in Cincinnati and set up an electrical engineering business. His best-known invention was an induction telegraph that let messages pass between moving trains and stations, helping dispatchers know where trains were. He applied for a patent in May 1885 and received it on 29 November 1887. He also developed a device combining telephone and telegraph functions, which, according to the Lemelson-MIT Program, was bought by Alexander Graham Bell's company.

Woods moved to New York City in the early 1890s (sources give 1890 or 1892), sometimes working with his brother Lyates. His later patents dealt largely with electric railways: systems for carrying current from a conduit or rail to a vehicle's motor, a 1901 power pick-up device associated with the third rail, and braking and control devices. The New York Transit Museum links his conduit design to the contact shoe used on the city's subway.

Disputes and contested claims

Woods spent much of his career in court; the APS counts at least 17 of his patents involved in legal proceedings. Popular accounts say Thomas Edison challenged his telegraph patent, lost, and then offered Woods a job or partnership, which he declined. The APS describes the documented interference case over the induction telegraph as one against Lucius J. Phelps, which Woods won by proving he had conceived the idea in 1881. Treat the Edison story as uncertain. The nickname "Black Edison" is well attested.

Patent totals also vary: the APS and IEEE Spectrum give 45, the Transit Museum "over 50", and Lemelson-MIT "nearly 60".

Death and legacy

Woods died in New York City on 30 January 1910 and was buried in an unmarked grave in Queens that received a headstone only in 1975. Contemporaries sometimes denied him credit or underpaid him because of his race. His work on railway communication and power delivery remains part of the history of electric transit.