Leeds & Northrup Co – Ancien pont de mesure / Wheatstone...

An old precision electrical measurement bridge by Leeds & Northrup Co., made in Philadelphia, USA, and kept in its imposing original wooden case. The device features several decade selectors for resistances, various connection terminals, as well as an integrated Leeds & Northrup galvanometer with a “CLAMP” function. This type of laboratory instrument was intended for the precise measurement and comparison of electrical resistances, based on the Wheatstone bridge principle. The plate bears the inscription “Leeds & Northrup Co. – Philadelphia, PA – Made in U.S.A.” as well as the number 865827. The ensemble presents a handsome patina with signs of use and wear consistent with its age. Estimated dating: first half of the 20th century, probably around 1930–1950. ****sans fermeture / non testé *** Very sought-after in the worlds of industrial design, scientific curiosities, old medical technology, laboratory optics, steampunk, and rare measuring instruments. Ideal for a collector, industrial loft decoration, cabinet of curiosities, scientific showcase (theodolite, microscope, sextant, compass)

估價:$167.39

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