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The InventorsApril 23, 1856, Columbus, Ohio – January 30, 1910, New York City

Granville T. Woods

Electrical inventor and the 'Black Edison' — held 60 patents including the Synchronous Multiplex Railway Telegraph

and the 'Black Edison' — held 60 patents including the Synchronous Multiplex Railway Telegraph

ProfileElectrical EngineeringInventionThe InventorsNew York, NYMaleHistoricalHistorical●LegacySelf-funded

Why This Person Is Included

Granville T. Woods held 60 patents across electrical engineering, railroad safety, and communications systems — and Thomas Edison twice attempted to claim priority over Woods's inventions and twice lost in court. Woods is not in the same sentence as Edison in most historical accounts, despite Edison's own system having tried to absorb his work. The 'Black Edison' is rarely the Edison anyone means when they say 'Edison.'

Historical Significance

Woods's Synchronous Multiplex Railway Telegraph (1887) allowed moving trains to communicate with stations and with each other — reducing collisions and improving railroad safety at a moment when railroad travel was both the primary form of long-distance transportation and a significant source of accidental death.

The Story

Granville T. Woods was born in Columbus, Ohio, in 1856 and taught himself electrical engineering through self-study and work in various industrial settings — a railroad engine driver, an electrical engineer on ships, and a machine shop worker. He had no formal technical education beyond what he could acquire through practice and independent study.

His most significant patent — the Synchronous Multiplex Railway Telegraph (1887, Patent No. 373,383) — allowed railroad stations to communicate with moving trains by induction rather than direct wire connection. This made it possible to know where trains were on the track and to warn engineers of obstacles ahead. Edison twice claimed priority over variations of this invention; both claims were adjudicated in Woods's favor.

Woods held patents in electrical motors, amusement rides, third-rail systems, and other electrical applications. He sold several patents to Edison, Bell Telephone, and General Electric — the major electrical companies of his era. He died in New York in 1910 at 53, largely unknown to the general public despite his documented legal and technical achievements.

Sources

  1. 1.Granville T. Woods. National Inventors Hall of Fame. invent.org↗