Hansen Writing Ball Patent Model

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Description
This typewriter patent model accompanied the patent application of Hans R. Malling J. Hansen of Copenhagen, Denmark in his patent application that received patent number 125,952 on April 23, 1872. The model only shows a portion of the machine, with three letters in the “type-ball.” This patent was one of the earlier designs of Hansen’s unique writing ball typewriter. In his patent Hansen claimed the combination of converging types arranged circularly that met at the same point. Hansen also claimed the use of a spring or electro-magnet as a means of paper carriage movement. The electromagnet in the typewriter operated by closing the circuit on each descent of the type before it makes it impression on the paper. Closing the circuit causes an attraction of the armature of the magnet, moving the drum before the type hits. After the drum moved a full line, the mechanism would move it down a line.
Location
Currently not on view
date made
1872-04-23
patent date
1872-04-23
maker
Hansen, Hans R. M. J.
inventor
Hansen, Hans R. M. J.
associated place
Danmark: København, Copenhagen
Physical Description
mahogany (overall material)
Measurements
overall: 5 in x 12 1/2 in x 10 in; 12.7 cm x 31.75 cm x 25.4 cm
ID Number
ME.308874
catalog number
308874
license number
125,952
accession number
89797
patent number
125,952
See more items in
Work and Industry: Mechanisms
Typewriters
Computers & Business Machines
Data Source
National Museum of American History, Kenneth E. Behring Center

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