Assertion: idler pulley | /r/CapableOf | serve to maintain the tension
Facets:
value: on the rope
type: TRANSITIVE-OBJECT
Source sentences:
text: Typically, the rope connecting two pulleys with multiple V-grooves was spliced into a single loop that traveled along a helical path before being returned to its starting position by an idler pulley that also served to maintain the tension on the rope.