411 REFERENCE · Wiktionary
Prony brake
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Invented by Gaspard de Prony in 1821.
Noun
A device to measure the torque produced by an engine, essentially by wrapping a cord or belt around the output shaft and measuring the force transferred to the belt through friction.
en eponyms