Orbiculus trochleae

Latin Construction

orbicul|us trochleae. masc.

1. The wheel of a pulley.

Constructions

none yet collected

Loci

• αʹ⁻² Vitruvius, De Architectura 10.2.1:

Per orbiculum 〈 summum 〉 traicitur ductarius funis, deinde demittitur et traducitur circa orbiculum trochleae inferioris. Refertur autem ad orbiculum imum trochleae superioris et ita descendit ad inferiorem et in foramine eius religatur.

The tow rope is passed over the top wheel, then it is dropped down and passed around the lower block's wheel. It is then brought back to the bottom wheel of the upper block, and so comes down to the lower one and is fastened through the hole in it.