Roberval balance
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The Roberval balance is a weighing scale presented to the French Academy of Sciences by the French mathematician Gilles Personne de Roberval in 1669.
A Roberval balance made by W & T Avery Ltd. in England
Detail: the bottom horizontal beam is hidden under the protective cover
W & T Avery
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W & T Avery Ltd. was a British manufacturer of weighing machines. The company was founded in the early 18th century and took the name W & T Avery in 1818. Having been taken over by GEC in 1979 the company was later renamed into GEC-Avery. The company became Avery Berkel in 1993 when GEC acquired the Dutch company Berkel. After the take over by Weigh-Tronix in 2000 the company was again renamed to be called Avery Weigh-Tronix with Avery Berkel continuing to operate as a brand. The company is based in Smethwick, West Midlands, United Kingdom.
Main gate to the Soho Foundry, the company's head office
Edge of a weighbridge by W & T Avery 1910
Set of scales made by Avery in the 1960s