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CAMBRIDGE SPOT GALVANOMETER, 1950's
Spot Galvanometer with a 450 ohm movement made by Cambridge Instruments. In working order.
Donated by L.G.Bray
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- As a student in the 1950s I spent a period working in the Test Room of Cambridge Instruments, Sydney Road, London. We used these spot galvanometers as the null detectors on bridges (Wheatstone And Carey-Foster I believe). They were both sensitive and quite robust. Normally they were placed on some form of anti-vibration base. If the bridge was well out of balance, the spot would stick at one end. A tap on the case was then needed to release it.
.......... Adrian Morant, Edgware, Middx. England, 23rd of December 2013