Archimedes' screw a crank mechanism in his "Bellifortis" (1405). This mechanism quickly replaced the ancient practice of working the pipe by treading. The Archimedes screw consists of a screw (a helical surface surrounding a central cylindrical shaft) inside a hollow pipe. The screw is usually turned by windmill, manual labor, cattle, or by modern means, such as a motor. As the shaft turns the bottom end scoops up a volume of water. This water is then pushed up the tube by the rotating helicoid until it pours out from the top of the tube. The contact surface between the screw and the
The Golden Screw The Golden Screw The Golden Screw was an Off-Off-Broadway folk rock musical written and performed by Tom Sankey which premiered at the Theatre Genesis in September 1966. It ran again from January 30, 1967 to March 5, 1967 at the Provincetown Playhouse in Greenwich Village. The show's cast album was the first rock theatrical recording of its kind. The play follows a Bob Dylanesque singer figure from folk music roots to commercialization. A subsequent production was mounted at Toronto's Global Village Theatre in 1972. Directed by Sankey, the cast included Elan Ross Gibson, Francois Regis-Klanfer and Yank Azman with music