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ID number: BIRRC-P0457 Institution: Research and Cultural Collections Named collection: Historic Physics Collection Artist / Maker: Wolff, O. Title / Object name: Wheatstone Bridge Object type: Electrical instrument Place made: Berlin Date made: c. 1921 Materials: Brass controls on bakelite panel on wooden case. Separate wooden lid Measurements: 34 x 25.5 x 10 cm |
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A Wheatstone bridge is a very common device for measuring electrical resistances. This is a high quality instrument for use as a standard at its time. The controls are all on a black bakelite panel on the top of a wooden box. The ratio arms of 1000, 100, 10, 1 are selected with plugs. The main arm has four rotary switches (with wiping contacts all exposed) giving resistances of 1 to 9999 ohms. The unknown X is mounted between two clamping screws. There are tapping keys with locking levers for the battery B and galvanometer G. Inscriptions / Translations: Otto Wolff, Berlin. 4170 |
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