Online Collections at UoB - Objects
ID number: BIRRC-P0568 Institution: Research and Cultural Collections Named collection: Historic Physics Collection Artist / Maker: Weston Electrical Instrument Co. Title / Object name: Millivoltmeter - Laboratory standard Object type: Electrical instrument
Place made: Newark, N.J., USA Date made: 1922 Materials: Various on polished wooden base Measurements: 42 x 35.5 x 11.5 cm., Scale length 30.0 cm
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This is a large moving-coil meter calibrated in millivolts. The terminals are marked + and 50 mV. There are three scales reading 0, 0.5, ...., 5; 0, 1, ...., 10; 0, 0.1, ...., 1. There are vernier type markings so that the scale can be read to 0.001 of full scale reading. The instrument has a levelling bubble and built-in thermometer. It is mounted on a home-made levelling table.
Inscriptions / Translations: Large brass plate: WESTON DIRECT READING LABORATORY STANDARD MILLI-VOLTMETER Weston Electrical Instrument Co, Manufacturers, Newark, NJ, U.S.A. Patented [list of numbers and dates from 1888 to 1890] No. 1151 Marked on scale: Model 5 No. 1151
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