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Laurens Hammond (1895–1973)

American mechanical engineer and prolific inventor, born 1895 in Evanston, Illinois. Cornell engineering graduate (1916), WWI veteran, and founder of the Hammond Clock Company (1928).

Path to the organ

  • Invented a synchronous motor that ran silently and steadily on the new 60-cycle household AC supply — the key enabler of both his silent electric clock and the later organ.
  • Other inventions: one of the first successful 3D movie systems, an automated electric bridge table (a Depression-era product whose decline pushed him to look for a new hit).
  • Inspiration for the organ: the musical tones produced by the moving gears of his electric clocks; he combined a $15 second-hand piano with a compact tonewheel generator descended from Cahill's Telharmonium.
  • Not a musician himself — he had the company's assistant treasurer (trained organist W. L. Lahey) help voice the instrument.^[raw/articles/wikipedia-hammond-organ.md]

The organ

Filed the patent on April 24, 1934 (co-inventor John M. Hanert), unveiled April 1935, first Model A shipped June 1935. Henry Ford placed the first order (six organs) before production even started — but serial #1 went to a Kansas City dealer and ended up in the Smithsonian.^[raw/articles/hammondorganco-hammond-story.md]

To cut costs he used a 25-note pedalboard instead of the church-standard 32 — it became the de facto standard for decades.^[raw/articles/wikipedia-hammond-organ.md]

Legacy

He declined to market Don Leslie's rotating speaker and even made the console connectors "Leslie-proof" — a rare misjudgment, as the Leslie speaker became inseparable from the organ's identity.