Patent model, Siemens magneto-electric apparatus, US Patent #149,797
date: label: Date made
content: 1874
name: label: maker
content: Siemens, Ernst W.
notes: label: Description (Brief)
content: Model to accompany US Patent #149797, "Improvement in magneto-electric apparatus," issued 14 April 1874 to Ernst W. Siemens. Two pieces: .01: a wooden base on which is mounted two vertical cylinders that support a platform. A brass mechanism is mounted on the platform and includes an adjustment screw, three brass plates, a wire-wound coil, and three parallel wires. See figures 1 through 3 in the patent. Silver painted, with the remnant of the original patent tag. Stamped on top: " Ernst Werner Siemens / Inventor / Berlin / Prussia". .02: Silver painted, a wooden base on which is mounted two vertical cylinders that support an annular coil with needle pointer. See figure 10 in the patent. Silver painted, with the remnant of the original patent tag. Stamped on top: " Ernst Werner Siemens / Inventor / Berlin / Prussia".
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.308576
label: catalog number
content: 308576
label: accession number
content: 89797
label: patent number
content: 149797
objectType: label: Object Name
content: Magneto Electric Apparatus
label: Other Terms
content: Magneto Electric Apparatus; Electromagnetic Devices; Magnetic Devices; Electromagnetic Devices
physicalDescription: label: Measurements
content: .01: 10 in x 4 3/8 in x 8 5/8 in; 25.4 cm x 11.1125 cm x 21.9075 cm
label: Measurements
content: .02: 4 3/4 in x 3 11/16 in x 1 7/8 in; 12.065 cm x 9.3345 cm x 4.7625 cm