Drawing Instrument or Planigraph by Martin Schilling, No. 352, Ser. 32, No. 5

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In this linkage, three short brass rodss connect a fixed brass rod to a moveable one. The fixed rod is at the center. A drawing pin attached at the lower end of the moving rod describes a plane disc. The pin can trace any curve within the disc.
A paper label on the base reads: Planigraph. (/) 32. Serie, Nr. 6. (/) Verlag v. Martin Schilling, Leipzig.
This instrument was based on discoveries of Professor Gaston Darboux (1842-1917) and on the design of Professor Gabriel Xavier Paul Koenigs (1858-1931), both of Paris. It was part of a series of models by Schilling first published in 1906 and 1908, and marketed as illustrating principles of kinematics and physics.
Gabriel Koenigs, Leçons de Cinématique Professé à la Sorbonne, Paris: Hermann, 1897, pp. 295-297.
M. Schilling, Catalog mathematicher Modelle, Leipzig, 1911, pp. 88, 166-167.
Currently not on view
date made
ca 1910
Physical Description
metal (mechanism material)
wood (base material)
paper (label material)
overall: 39 cm x 22.7 cm x 18.7 cm; 15 11/32 in x 8 15/16 in x 7 3/8 in
ID Number
catalog number
accession number
Credit Line
Gift of the Department of Mathematics, The University of Michigan
Drafting, Engineering
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Single Drawing Instruments
Data Source
National Museum of American History


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