Elementary lessons in steam machinery and the marine steam engine, with a short description of the construction of a battleship (1893)
Langmaid, Joseph, Gaisford, H · London, New York : Macmillan · leaf 61
ut or developed by AB will be a spiral or screw surface. If the line AB made a complete revolution round AA thedistance of A from A at the end of the revolution would be thep>itch of the screw. It is obviously equal to the distance betweentwo consecutive turns measured in the direction of the… … Fig. 17.—Formation of a Screw Thread. (Page 40.)
Steam-engines · Marine engines
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