Blueprints, James Power's Coding Attachment for Typewriters
date: label: date made
content: 1922-1925
notes: label: Description
content: These three blueprints show the drawings for U.S. Patent 1,541,183, filed by James Powers April 25, 1922, renewed April 30, 1925, and granted June 9, 1925. They show what Powers called a "coding attachment for typewriters." Powers assigned the patent to the American Code Machine Company of Memphis, Tennessee.
label: Description
content: Reference:
label: Description
content: James Powers, "Coding Attachment for Typewriters," U.S. Patent 1,541,183, June 9, 1925.
label: Location
content: Currently not on view
place: label: place made
content: United States: New York, New York City
topic: label: Subject
content: Mathematics
label: Subject
content: Codes and Ciphers
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Thor Dockweiler
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1991.3180.09
label: nonaccession number
content: 1991.3180
label: catalog number
content: 1991.3180.09
objectType: label: Object Name
content: sheets
physicalDescription: label: Physical Description
content: paper (overall material)
label: Measurements
content: overall: .1 cm x 22.3 cm x 35 cm; 1/32 in x 8 25/32 in x 13 25/32 in