Acme Portable Testing Set electrical bridge

Description (Brief):

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.

Date Made: 1893

Maker: Acme Portable Testing Co.

Location: Currently not on view

See more items in: Work and Industry: Electricity

Exhibition:

Exhibition Location:

Credit Line: from Weston Electrical Instrument Corp., thru John H. Miller

Data Source: National Museum of American History

Id Number: EM.313269Catalog Number: 313269Accession Number: 181342

Object Name: Bridge, Resistanceresistance bridgebridge resistanceOther Terms: Bridge, Resistance; Measuring Devices

Measurements: overall: 6 in x 8 1/4 in x 6 1/4 in; 15.24 cm x 20.955 cm x 15.875 cm

Guid: http://n2t.net/ark:/65665/ng49ca746a5-2e31-704b-e053-15f76fa0b4fa

Record Id: nmah_706142

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