Thordarson type R transformer
date: label: date made
content: 1922
name: label: maker
content: Thordarson Electric Manufacturing Company
notes: label: Description (Brief)
content: Thordarson type R transformer. Plate: "Electrical Apparatus / Type R / K.W. 1/2 / Amp. 1-6 / No. 4F81-11 / volts 110-10000 / Thordarson Electric Mfg. Co. / Chicago, Illinois"; on frame: "Pat. March 3, 1908." A 10,000 volt air-cooled wireless transformer with 1/2 kw rating. Manufacturer claimed an efficiency of 92%. Unit has a magnetic shunt control that protects the transformer from undue current surges. No choke coil is necessary for use with specimen. Original price: $27.00. Reference: F. D. Pitts Co. catalog #22, page 73.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.321674
label: catalog number
content: 321674
label: accession number
content: 241556
objectType: label: Object Name
content: transformer
physicalDescription: label: Measurements
content: overall: 11 1/4 in x 9 in x 5 1/2 in; 28.575 cm x 22.86 cm x 13.97 cm