Deformation of a cylinder, surface string model

Made:
1872 in Paris
maker:
Fabre de Lagrange

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Staircase vault: model for exhibiting some properties of this ruled surface, by showing how it is obtained from the deformation of a cylinder (douelle de la vis St. Gilles carree)

This is one of a large set of ruled surface models made by Fabre de Lagrange, in Paris, France, following designs introduced in the early 19th century. They illustrate surfaces which can be traced out in space by the movement of a straight line. This particular model shows a staircase vault which is obtained by the deformation of a cylinder.

Details

Category:
Mathematics
Object Number:
1872-119
Materials:
brass, lead, wood, string and complete
type:
surface model (string)
credit:
Fabre de Lagrange