Geometric instrument and method of making same

Details Geometric instrument and method of making same Geometric instrument and method of making same

1987-05-18

1989-08-22

Haroian, Harry N.

Geometrical instruments

Scriber

Curved line

335585, B43L 902

Patent

active

048583260

ABSTRACT:
A pair of compasses has legs articulated by a pivot pin. Each leg is of moulded plastics with a strengthening metal insert provided in each leg. Projecting circular parts of the inserts are overlapped and articulated together by the pin within a bow top.

REFERENCES:
patent: 902257 (1908-10-01), Schoenner
patent: 4146965 (1979-04-01), Payton

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