Wallace direct current electrical generator
date: label: date made
content: 1879
name: label: maker
content: Wallace & Sons
notes: label: Description (Brief)
content: Generator for electric lighting system. This specimen utilizes seven elliptical-type field magnets designed to energize curved pole pieces on either side of a Siemens-type armature. A belt-drive coupling-wheel is used on the armature shaft. The field was personally designed by Wallace with the purpose of avoiding magnetic leakage. Hammer states that the machine was constructed on February 2, 1878, but wording in his article may actually refer to construction of the armature alone. Reference: Accession papers. Also William J. Hammer, "William Wallace and His Contributions to the Electrical Indus tires," Electrical Engineer, 1893.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Coe Brass Manufacturing Co.
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.181645
label: catalog number
content: 181645
label: accession number
content: 32363
objectType: label: Object Name
content: electrical generator
label: Object Name
content: dynamo
label: Object Name
content: motor
physicalDescription: label: Measurements
content: overall: 17 in x 28 in x 35 in; 43.18 cm x 71.12 cm x 88.9 cm