Hedy Lamarr, 1938.
Hedy Lamarr, 1938.Alfred Eisenstaedt--Time & Life Pictures/Getty Images
Hedy Lamarr, 1938.
Hedy Lamarr, 1938.
Hedy Lamarr during press conference after her arrest for shoplifting, Los Angeles, 1966. The charges were dropped.
Hedy Lamarr, Los Angeles, 1946.
Hedy Lamarr, 1938.
Hedy Lamarr, 1938.
Alfred Eisenstaedt--Time & Life Pictures/Getty Images
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LIFE With Hedy Lamarr: Stardom, Scandal and One Amazing Invention

Oct 20, 2014

She was a glamorous movie star of the 1930s and '40s, a taboo-breaking beauty credited with simulating the first on-screen orgasm (outside of pornography movies, of course) and appearing naked in the 1933 Czech film, Ecstasy. But Hedy Lamarr was a trailblazer in more ways than one. Fascinated by science and eager to find a way to help the Allies during World War II, she devised a way to make radio signals "jump" between frequencies -- a technique known as "frequency-hopping" -- in order to prevent the signals from being jammed.

After Lamarr and her partner, the composer George Antheil, obtained a patent for the invention in 1942, they gave it -- at no charge -- to the U.S. Navy, which began using it in the 1960s. Today, variants of Hedy Lamarr's breakthrough invention are used in communication technologies like Bluetooth and CDMA.

The story of Lamarr and Antheil's triumph can be found in Richard Rhodes' 2011 book, Hedy's Folly: The Life and Breakthrough Inventions of Hedy Lamarr, the Most Beautiful Woman in the World. In 2014, the two were finally inducted into the National Inventors Hall of Fame.

Here, 100 years after her birth (b. Nov. 9, 1914, in Vienna), LIFE celebrates Hedy Lamarr, the movie star. She died in 2000 at age 86, more famous for her movie career, off-screen romances and scandals (two shoplifting arrests later in life; six marriages; seemingly endless lawsuits brought by her and against her) than for the brilliant, landmark technology she brought to life.

Hedy Lamarr, 1942LIFE Magazine 
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