Frederick Ellsworth Sickels Photo

Frederick Ellsworth Sickels

Born: Sep 20, 1819

Death: Mar 8, 1895

Birthplace: United States of America

Nationality: United States

Frederick Ellsworth Sickels

Date of Birth : Sep 20, 1819
Date of Death : Mar 8, 1895
Birth Place : United States of America

Frederick Ellsworth Sickels or Sickles was an American inventor, best known for the invention of a cut-off valve for steam engines in 1841. Sickels grew up in New York City, where his father was Chief Health Officer. After having worked for a year for the Harlem Railroad, he apprenticed at the age of 17 at the Allaire shops, where he developed a new type of steam cut-off valve for steam engines. He had perfected his invention by 1841. Sickels obtained a patent for this invention, which he called 'Manner of constructing the apparatus for lifting, tripping, and regulating the closing of valves of steam engines' on March 20, 1842. Thurston relates "It was introduced by the inventor in a form which especially adapted it to use with the beam-engine used on the Eastern waters of the United States, and was adapted to stationary engines by Messrs. Thurston, Greene & Co., of Providence, R. I., who made use of it for some years before any other form of "drop cut-off" came into general use.

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