Joseph Mortimer Granville (1833–1900), an English physician, author, and inventor, is best known for patenting the electromechanical vibrator in the 1880s, originally designed to relieve male muscle pain. Though often mythologized as the creator of the first electrical sex toy, historical evidence refutes this claim, underscoring his emphasis on medical innovation and the treatment of ailments such as gout. A prolific writer, Granville authored works such as Nerve-Vibration and Excitation (1883) and The Borderlands of Insanity (1877), examining themes of mental health, the mind-body relationship, and the dangers of overwork.
His essays in Popular Science Monthly analyzed the mechanisms of thought, dreams, and psychological well-being, reflecting his dedication to advancing medical practice and public comprehension of mental discipline. Granville’s legacy combines his technical achievements with his insightful explorations of human cognition, establishing his position as a key figure in 19th-century medical and psychological discourse.