Geometric Model, Ruled Surface Adjustable from Cylinder to Hyperboloid of One Sheet to Double Cone
notes: label: Description
content: This adjustable string model has a metal base painted black that supports two brass discs on a central spindle. A circle of holes is near the rim of both discs. The gold threads that join these holes form a cylinder. A screw below the lower disc holds a metal sleeve that in turn holds up the disc. Releasing this screw and twisting the lower disc generates a hyperboloid of one sheet. Raising the sleeve and securing the screw holds the model in this position.
label: Description
content: The model is unsigned.
label: Description
content: Compare 1982.0795.30. Also compare Brill model 1985.0112.009, in which weights are used in place of a mechanism. The Brill model shows other surfaces as well.
label: Location
content: Currently not on view
topic: label: Subject
content: Mathematics
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 the Department of Mathematics, The University of Michigan
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1982.0795.29
label: catalog number
content: 1982.0795.29
label: accession number
content: 1982.0795
objectType: label: Object Name
content: Geometric Model
physicalDescription: label: Physical Description
content: string (overall material)
label: Physical Description
content: brass (overall material)
label: Measurements
content: overall: 43.5 cm x 23.5 cm x 23.5 cm; 17 1/8 in x 9 1/4 in x 9 1/4 in