cosine galvanometer with moving magnet
Date: circa 1871
Inventory Number: 0241
Classification: Galvanometer
Subject:
Attributed to: John Trowbridge (1843 - 1923)
User: Department of Physics, Harvard University (founded 1884)
Cultural Region:
Place of Origin:
Dimensions:
41.3 × 31.5 × 31.5 cm (16 1/4 × 12 3/8 × 12 3/8 in.)
Description:
Compass with a silvered dial surrounded by a movable coil of wire on a wooden ring which registers on a semi-circular scale between ring and dial. Vertically curved wooden support, round molded wooden base.
Signedunsigned
FunctionThe cosine galvanometer measures strong electrical currents with a vertical coil, movable about a horizontal axis.
Historical AttributesProbably made and used by John Trowbridge, a Harvard Physics professor.
Curatorial RemarksAccording to Cathryn Carson (see card), this is probably a cosine galvanometer, not a tangent galvanometer, and was invented and constructed by Prof. John Trowbridge.
In file: Letter from John T. Stock (University of Connecticut), letter from David P. Wheatland, and various articles.
In file: Letter from John T. Stock (University of Connecticut), letter from David P. Wheatland, and various articles.
ProvenanceFrom the Department of Physics, Harvard University, 01/04/1957.