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Knowles' patent yarn balance

By Norman Biggs and Jenny Hutchinson


In 1883 Thomas Knowles patented a balance designed to estimate the 'counts' of a sample of yarn without the need for calculations or tables. The balance was based on a clever, but practical, idea, and it was used extensively for well over 50 years. This note explains the essence of the idea, and the background of the people who designed and made the balance

Topics: QA Mathematics
Publisher: Maney Publishing
Year: 2009
DOI identifier: 10.1179/174329509x424640
OAI identifier:
Provided by: LSE Research Online
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