pulley block
noun1
A shell containing one or more sheaves, the whole forming a pulley.
- The next stage entailed toppling-over each girder into the river by means of hand-winches and pulley-blocks.1946 January and February, “Notes and News: Demolition of Rhydyfelin Viaduct”, in Railway Magazine, page 53:
- In 1799 he [Marc Brunel] designed a machine to make pulley blocks for the British Navy ... who turned out not to be good payers.2012, Andrew Martin, Underground Overground: A passenger's history of the Tube, Profile Books, →ISBN, page 87: