Head of universal parallel ruler

Details Head of universal parallel ruler Head of universal parallel ruler

1991-06-28

1992-09-01

Haroian, Harry N.

Geometrical instruments

Straightedge type

Base attached

33440, B43L 1308

Patent

active

051427893

ABSTRACT:
A head of a universal parallel ruler having a base 2 supported so as to be movable in parallel on a drafting board comprises a scale mounting plate 16 having an upper portion supported so as to be rotatable on the upper face side of the base 2 and a handle member 34 provided above the scale mounting plate 16, so that an operator can hold the handle member 34 by hand to directly rotate the scale mounting plate 16 for carrying out a plotting operation.

REFERENCES:
patent: 4578872 (1986-04-01), Yoshida et al.
patent: 4587742 (1986-05-01), Yoshida

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