Replica Deprez & Carpentier "fishbone" ammeter
name: label: referenced
content: Deprez & Carpentier
label: maker
content: L. C. Eichner Instruments
notes: label: Description (Brief)
content: Replica of an ammeter invented by Marcel Deprez (1843-1918) in 1881. Based on drawing in Dredge, Electric Illumination, Vol. I, London, 1882, 14-17. Deprez' device allowed for more precise measurement of electric current. The current flows in a rectangular coil around the top of pivoted "spines," exerting a deflecting force on the magnets. The ammeter, like others developed in the 1880s and 1890s, was calibrated to measure current in terms of standards formally adopted by the British Association for the Advancement of Science (1869) and the International Electrical Congress (1881).
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2001.3035.02
label: nonaccession number
content: 2001.3035
objectType: label: Object Name
content: ammeter
label: Object Name
content: demonstration apparatus
physicalDescription: label: Measurements
content: overall: 9 in x 12 in x 9 in; 22.86 cm x 30.48 cm x 22.86 cm