Hebern Electric - Cipher Machine Rotor
date: label: date made
content: ca 1925
label: date made
content: 1915
name: label: maker
content: Hebern, Edward
label: maker
content: Edward Hebern
notes: label: Description
content: Edward Hebern of California designed this rotor for a cipher machine. Commercial rotary cipher machines would be introduced in the 1920s and 1930s for commercial purposes by several people in several countries, and proved most important during World War II.
label: Description
content: Hebern’s rotor has twenty-six electrical wires which directed the flow of current representing each letter of the alphabet from one location to another. The twenty-six wires are covered with green cloth, each wire having lugs at each end. One lug of each wire is lettered. The lettered lug is screwed into electrical contacts on one side of the rotor. The wire then passes through a hole in the rotor and is attached to a contact on the other side. As the rotor is wired, alternate lettered and unlettered lugs appear around both circles of contacts.
label: Description
content: The rim of the rotor has a paper inset that reads: HEBERN ELECTRIC CODE. Another inset reads: NAVY-PRIVATE CODE. The rotor is stamped near the edge: MADE JAN 10 -1915.
label: Description
content: The rotor has a cardboard case covered inside and out with green velvet. The date on the rotor precedes Hebern's patents for rotary cipher machines and his establishment of a company to manufacture them.
label: Location
content: Currently not on view
place: label: place made
content: United States: California, Oakland
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: Military
creditLine: label: Credit Line
content: Gift of T. Scripps Downing
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1991.0190.07
label: catalog number
content: 1991.0190.07
objectType: label: Object Name
content: Cipher Machine
label: Object Name
content: cipher machine
physicalDescription: label: Measurements
content: overall: 2.5 cm x 11 cm x 11 cm; 31/32 in x 4 11/32 in x 4 11/32 in