Structure of isometric ellipse scale

Details Structure of isometric ellipse scale Structure of isometric ellipse scale

1991-01-07

1991-11-19

Cuchlinski, Jr., William A.

Geometrical instruments

Gauge

Template

434 87, B43L 1320, B43L 11055, G09B 1104

Patent

active

050655230

ABSTRACT:
An isometric ellipse scale for drawing ellipse of different size, comprising a body, a plurality of isometric ellipse molding plates that set one inside another, two fastening slides, and a casing for keeping said parts. The body and the isometric ellipse molding plates have each two pairs of parallel rails at two opposite ends and respectively longitudinally aligned so that the fastening slide can be respectively fastened therein to selectively secure the isometric ellipse molding plates to the body for drawing ellipse. The casing has an elliptical, raised portion at the center of the inner bottom thereof and made in size according to the elliptical center hole of the smallest one of the isometric ellipse molding plates for holding the isometric ellipse molding plates and the body in position.

REFERENCES:
patent: D141882 (1945-07-01), Matson
patent: D167043 (1952-06-01), Kintz
patent: 2950537 (1960-08-01), Fixen
patent: 4274459 (1981-06-01), Galajda
patent: 4594792 (1986-06-01), Cramb
patent: 4688330 (1987-08-01), Konrad
"Engineering Equipment and Supplies", Warren-Knight, 3/59 p. 20, No. 124 Large Isometric Ellipses.

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