Philip Harris and Co (1913) Ltd. Tangent Galvanometer. Mahogany/lacquered brass.

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Seller: josephgent (1,247) 100%, Location: Stoke-on-Trent, Ships to: GB & many other countries, Item: 253986605156 Hello, thank you for viewing this Tangent Galvanometer manufactured by Philip Harris and Company(1913) Ltd in Birmingham. An early measuring instrument for small electrical currents. The lacquered brass compass housing is mounted in a mahogany frame, which has a 6" diameter coil of insulated copper wire. The 4 1/2" diameter compass has four 90% quadrants, a mirror in the base and a jewelled pivot pin on which the compass arm sits. The coil is tapped at 2, 50 and 500 turns, with brass connectors. There is a number on the base of the stand 4947 I do not know the manufacturing date but it looks as if it could be the 1930's. A very interesting piece, for display for any one interested in electrical engineering. Overall dimensions; approx. 7 1/2" tall x 5 1/2" dia. base. It weighs 750 grams. Material: Mahogany and lacquered brass

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