Combination square, scribing tool and plumb level

Details Combination square, scribing tool and plumb level Combination square, scribing tool and plumb level

1983-04-14

1985-03-12

Haroian, Harry N.

Geometrical instruments

Straightedge type

Combined with level

33 42, 33379, 33480, G01C 924

Patent

active

045036241

ABSTRACT:
A combination tool is basically a carpenter's square in which an elongate blade is connected perpendicularly to an elongate handle. The blade has measuring scales on opposite edges each of which commence at the adjacent edge of the handle, and lines extend across the blade to permit easy visual alignment of both scales. Elongate apertures are formed along each line to facilitate use of the square as a scribing tool. The handle is a clear plastic hollow shell which is substantially filled with a liquid except for a small bubble so that the handle can function as a plumb level.

REFERENCES:
patent: 825217 (1906-07-01), Hull et al.
patent: 844243 (1907-02-01), Breul
patent: 854659 (1907-05-01), Matthews
patent: 2752693 (1956-07-01), Wullschleger
patent: 2948067 (1960-08-01), Mistretta

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