Acme Portable Testing Set electrical bridge
date: label: date made
content: 1893
name: label: maker
content: Acme Portable Testing Co.
notes: label: Description (Brief)
content: This testing set and bridge consists of an instrument with brass terminals, blocks, and plug connectors in a wooden case with lid; marked "The Acme Portable Testing Set / #636," Queen and Company, Philadelphia, Pa. A self-contained galvanometer is provided for balancing the bridge and general testing. The resistors in this set are made of platenoid which is an alloy of tungsten, copper, nickel and zinc. manganin, which is not affected by temperature, subsequently replaced platenoid and other alloys for this purpose.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Weston Electrical Instrument Corp., thru John H. Miller
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.313269
label: catalog number
content: 313269
label: accession number
content: 181342
objectType: label: Object Name
content: Bridge, Resistance
label: Object Name
content: resistance bridge
label: Object Name
content: bridge resistance
label: Other Terms
content: Bridge, Resistance; Measuring Devices
physicalDescription: label: Measurements
content: overall: 6 in x 8 1/4 in x 6 1/4 in; 15.24 cm x 20.955 cm x 15.875 cm