Compound lever (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Compound lever" in English language version.

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averyweigh-tronix.com

"The History of Weighing". Avery Weigh-Tronix. Archived from the original on 2012-03-02. Retrieved 2010-01-17.

Ceccarelli, Marco (2007). Distinguished Figures in Mechanism and Machine Science: Their Contributions and Legacies. Dordrecht: Springer. p. 16. ISBN 978-1-4020-6365-7. Retrieved 2010-01-17. Then in 1743 John Wyatt (1700–1766) introduced the idea of the compound lever, in which two or more levers work together to further reduce effort.

"The History of Weighing". Avery Weigh-Tronix. Archived from the original on 2012-03-02. Retrieved 2010-01-17.