Geometrical instruments – Scriber – Curved line
Patent
1974-08-22
1976-01-27
Aegerter, Richard E.
Geometrical instruments
Scriber
Curved line
33180R, B43L 1300
Patent
active
039343502
ABSTRACT:
An improved geometrical instrument for laying out and proportioning photographs and the like including a pair of angle members disposed in overlapping relationship, a diagonal strut connecting said angle members together for limited movement and means securing said angle members and strut together for selected relative movement between said angle members. The instrument of the present invention also includes an inset edge located at the apex of each of the included angles of the angle members to enable the user to make crop marks accurately reflecting the desired area.
REFERENCES:
patent: 2782513 (1957-02-01), Brandt
Aegerter Richard E.
Josten's, Inc.
Little Willis
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