Schwerd and Scharnweber dynamo (Gramme type)
date: label: Date made
content: c1872
label: date made
content: ca 1872
name: label: maker
content: Siemens
label: maker
content: Schwerd and Scharnweber
notes: label: Description (Brief)
content: This is a small dynamo of the Gramme type, attributed to L. E. Schwerd (inventor) and L. Scharnweber (entrepreneur). Ivory label reads: "Ferdinad Ernecke, Berlin S. W. 46. Representat Prin: Socecu & Co. Bucuresci."
label: Description (Brief)
content: A small series dynamo with hollow ring armature. The field is a pair of electromagnets, facing one another and joined magnetically by an arch of iron. The armature rotates within these semi-circular arches. The commutator is divided into eight bars. The brushes can be positioned by a rocker. The field coils are painted green and the magnetic circuit red. At the end of the axis opposite the brushes is a pulley. Two binding posts on the wooden base. Painted on top: "591."
label: Description (Brief)
content: Reference: Groenendijk Collection Catalog page 20 for item 5h-34 "Dynamo van Schwerd en Schwarnweber" [sic]. See also: Wormell, "Electricity in the Service of Man," (London: Cassell & Co., 1886) pages 265-266.
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: EM.315596
label: catalog number
content: 315596
label: collector/donor number
content: 5h-34
label: accession number
content: 216300
objectType: label: Object Name
content: Generator
label: Other Terms
content: Generator; Motors and Generators
physicalDescription: label: Measurements
content: overall: 6 1/2 in x 9 1/2 in x 14 in; 16.51 cm x 24.13 cm x 35.56 cm