Variable angle protractor

Details Variable angle protractor Variable angle protractor

1987-08-27

1988-10-25

Haroian, Harry N.

Geometrical instruments

Gauge

Collocating

33465, 33403, B27G 2300

Patent

active

047793546

ABSTRACT:
An improved adjustable protractor including a flat base member in pivoted connection with a pivoting member. The base member is calibrated with degrees indicia. The pivoting member includes an indicia indicator to detect designated degree indicia. Clamp is provided to clamp members together at a selected position.

REFERENCES:
patent: 2011945 (1935-08-01), Mathi
patent: 2631376 (1953-03-01), Callahan
patent: 2770042 (1956-11-01), Hone
patent: 3070887 (1963-01-01), Olsen
patent: 4443950 (1984-04-01), Cockeram

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