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Serie X, Nr 2b

Models for thread constructions of the ellipsoid. Construction of a confocal ellipsoid and hyperboloid.


Mathematical description
This is a model for the construction of an ellipsoid using two confocal surfaces of degree 2. In this case, the surfaces are an ellipsoid and an hyperboloid. There are two not elastic strings. They go from a point around the ellipsoid and touch the intersection. The string comming from point on the left side was originally red and touches on both sides a long part of the intersection. The other string was originally yellow and touches the intersection just in one point.

Title model and translation
Modelle für Fadenconstructionen des Ellipsoids. Construction aus einem confocalen Ellipsoid und Hyperboloid.
Models for thread constructions of the ellipsoid. Construction of a confocal ellipsoid and hyperboloid.

Text on Sticker and translation
Model für Fadenconstr. d. Ellipsoids.
Models for thread constructions of the ellipsoid.

Designer
O. Staude
München in 1885

Company
L. Brill in Darmstadt

Original price
Mark 7

Dimension
20-9 cm

Material
Plaster

Literature
Schilling, M., Catalog mathematischer Modelle für den höheren mathematischen Unterricht, Leipzig: Verlag von Martin Schilling, 1911