Safety compass

Details Safety compass Safety compass

1991-03-21

1992-02-25

Haroian, Harry N.

Geometrical instruments

Scriber

Curved line

335585, G01B 316

Patent

active

050901273

ABSTRACT:
A safety compass comprising first and second leg members. The leg members have a pivot opening and an arcuate slot formed in an upper portion thereof. The upper end portion of the leg members are pivotally attached together by a handle member having a pair of spaced apart side leaves that receive the upper end portions of the leg members therebetween. The leaves have horizontally aligned pivot openings and substantial vertical slots formed therein. A pivot pin member extends through the pivot openings formed in the leaves and the leg members. A guide pin member extends into and moves within the slots formed in the leg members and the leaves. A unique means is provided to retain a drawing implement. All of the component parts are preferably fabricated from a plastic material.

REFERENCES:
patent: 730388 (1903-06-01), Oberbeck
patent: 854586 (1907-05-01), Mayer
patent: 2582585 (1952-01-01), DeCesaris
patent: 4104801 (1978-08-01), Payton

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