Farey's ellipsograph, 1817.

Made:
1817 in London

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Brass Farey's ellipsograph dated 1817, in mahogany case

Farey's ellipsograph dated 1817 in mahogany case. An ellipsograph is used to draw ellipses, which consist of a combination of two circular motions. The drawing pencil is fixed in position in a central ring, which then revolves. At the same time, the ring is carried round in a circle, and the pencil traces the combination of these two paths.

Details

Category:
Mathematics
Object Number:
1909-191
Materials:
brass, complete and ivory
Measurements:
overall (estimate): 55 x 230 x 180 mm
type:
ellipsograph
credit:
Theodore F.S. Tinne