Patent model, Hall and Snow electro-magnetic switch, US Patent #191,958
date: label: date made
content: ca 1877
label: date made
content: ca. 1877
label: patent date
content: 1877-06-12
name: label: inventor
content: Hall, Thomas S.
label: inventor
content: Snow, George H.
notes: label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Transportation, Railroad
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: TR.308990
label: catalog number
content: 308990
label: patent number
content: 191,958
label: accession number
content: 89797
objectType: label: Object Name
content: patent model, railroad electro magnet switch
label: Other Terms
content: patent model, railroad electro magnet switch; switch signal; Rail
physicalDescription: label: Measurements
content: overall: 1 1/4 in x 12 in x 3 in; 3.175 cm x 30.48 cm x 7.62 cm