Square relief device

Details Square relief device Square relief device

1991-01-30

1992-04-14

Haroian, Harry N.

Geometrical instruments

Straightedge type

Plural straightedges nonadjustably fixed at right angles

33481, 33480, 33429, B43L 702

Patent

active

051035707

ABSTRACT:
A square device for use by steel fabricators including a blade member and a beam member attached adjacent one end of the blade member whereby the adjacent inner surfaces of the blade member and beam member are at right angles to each other, and an elongated notch defined by the inner surface of the beam member extending from one end of the inner surface of the beam member to the other end of the beam member and which is of sufficient width whereby a portion of the notch extends above and below the blade member. In a preferred embodiment, the inner corner of the beam member is provided with a vertical groove.

REFERENCES:
patent: 635050 (1899-10-01), MacFarren
patent: 771392 (1904-10-01), Rechenberg
patent: 2435799 (1948-02-01), Rizor

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