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Geometric Model, Ruled Surface Adjustable from Double Cone and Cylinder to Hyperboloid of One Sheet

Geometric Model, Ruled Surface Adjustable from Double Cone and Cylinder to Hyperboloid of One Sheet

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Description
This adjustable string model has four round horizontal brass discs and a central base, spindle and handle. There are holes around the edges of the discs, and the middle one may be rotated. The strings of the model pass through the holes. In one position, they form a cone and a cylinder. In another, they form a hyperboloid of one sheet.
The model has no maker's mark.
This model follows the design of an Olivier or Brill model of a quadric surface. Compare to the model by L. Brill with museum number 1985.0112.009.
Location
Currently not on view
Object Name
Geometric Model
Physical Description
brass (rings material)
iron (framework material)
string (threads material)
Measurements
overall: 42 cm x 21 cm x 21 cm; 16 17/32 in x 8 9/32 in x 8 9/32 in
ID Number
1982.0795.30
accession number
1982.0795
catalog number
1982.0795.30
Credit Line
Gift of the Department of Mathematics, The University of Michigan
subject
Mathematics
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History
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