The Probert Encyclopaedia of Science & Technology

DERRICK

A derrick is a lofty, portable, temporary, crane-like structure consisting of a single post or pole, supported by stays and guys, to which a boom with a pulley or pulleys is attached, used in loading and unloading vessels, etc. They were invented in 1857 by Bishop for raising sunken vessels and named after the 17th century Tyburn hangman, Derrick.
Research Derrick