Illustrated Companion to the Latin Dictionary/Trispastos

This article incorporates text from a publication now in the public domain: Rich, Anthony (1849). The illustrated companion to the Latin dictionary, and Greek lexicon. p. vi. OCLC 894670115. https://archive.org/details/illustratedcompa00rich. 

TRISPAS'TOS (τρίσπαστος). A mechanical contrivance employed for the purpose of raising heavy weights, consisting of three pullies (orbiculi) set in a single frame or case (trochlea) in the manner exhibited by the annexed figure (Trispastos/1.1), which represents a similar machine still in common use at the present day. Vitruv. x. 2. 3.

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  Trispastos/1.1