Framing and layout square

Details Framing and layout square Framing and layout square

1981-08-05

1983-12-20

Haroian, Harry N.

Geometrical instruments

Straightedge type

Plural straightedges nonadjustably fixed at right angles

B43L 700

Patent

active

044208910

ABSTRACT:
A framing and layout square of flat unitary construction is provided exhibiting a number of unique and innovative features. The square includes an elongated blade, an elongated slot defined in the blade and parallel to the edges of the blade to provide two additional edges for the marking of measurement scales, a tongue joined at a right angle to the blade and provided with a terminal edge set at a forty-five degree angle to the tongue's lateral edges and adapted to provide a pivot point for the measurement of angles.

REFERENCES:
patent: 189311 (1977-04-01), Klinglesmith
patent: 327283 (1885-09-01), Levy
patent: 558117 (1896-04-01), Spaulding
patent: 563465 (1896-07-01), Farley
patent: 846274 (1907-03-01), Yates
patent: 1176026 (1916-03-01), Boone
patent: 1196519 (1916-08-01), Caylor
patent: 1660624 (1928-02-01), Musham
patent: 1708551 (1929-04-01), Nell

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