Wallboard T-square with sharpener

Details Wallboard T-square with sharpener Wallboard T-square with sharpener

1995-09-14

1998-05-12

Bennett, G. Bradley

Geometrical instruments

Straightedge type

Plural straightedges nonadjustably fixed at right angles

33 42, 33485, B43L 702

Patent

active

057491534

ABSTRACT:
A T-square for wallboard having a knife-sharpening means mounted on the body of the T-square, allowing the user of the T-square to easily and efficiently sharpen a trimming knife while the T-square is held in operative position on the wallboard. The sharpener may be a simple slot in the T-square, or blades mounted in a "V" formation, or a sharpening stone. The body of the T-square is preferably coated in a fluorescent color coating.

REFERENCES:
patent: 180521 (1876-08-01), Beach
patent: 501774 (1893-07-01), Dunnington
patent: 685369 (1901-10-01), Barrie
patent: 996242 (1911-06-01), Heinzman
patent: 1555653 (1925-09-01), Frank
patent: 4075467 (1978-02-01), Peterson
patent: 4903409 (1990-02-01), Kaplan et al.
patent: 4979304 (1990-12-01), Sprague
patent: 5040256 (1991-08-01), Mills

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