Oval compass

Details Oval compass Oval compass

1978-05-04

1979-04-10

Haroian, Harry N.

Geometrical instruments

Scriber

Curved line

B43L 1104

Patent

active

041481445

ABSTRACT:
An ellipse drawing instrument employing a drawing arm, and a pair of members adapted to be connected to the drawing arm at two spaced points on the drawing arm, one of the members being constrained to move along a first path and the other of said members being constrained to move along a second path crossing the first path so that in use, as the members reciprocate along their respective paths, a point of the arm describes an elliptical path.
The paths are linear and perpendicular to each other.

REFERENCES:
patent: 717082 (1902-12-01), Dart

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