Ellipsograph

Details Ellipsograph Ellipsograph

1986-07-16

1987-08-25

Stearns, Richard R.

Geometrical instruments

Scriber

Curved line

33 307, B43L 1104

Patent

active

046883312

ABSTRACT:
The crank guide rod mechanism for performing nearly rectilinear motion is formed by using the mathematical method from which is designed the ellipsograph of the hidden cross-groove principle employing two points of support for the suspension-extension support frame. This will enable the drawing pen to move on the face of the paper in a suspended manner. The steering rod is made up of two long slabs (the rule and the steering rod) within the plane of projection, which enables the handle on the top to drive the drawing pen and describe the whole ellipse directly.

REFERENCES:
patent: 2926423 (1960-03-01), Johnson
patent: 3854213 (1974-12-01), Armitt

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