Geometrical instruments – Straightedge type – Plural straightedges nonadjustably fixed at right angles
Patent
1989-09-11
1990-07-31
Shoap, Allan N.
Geometrical instruments
Straightedge type
Plural straightedges nonadjustably fixed at right angles
33451, B43L 706
Patent
active
049440969
ABSTRACT:
A wall stud centering square is arranged for overlying centering marks premeasured along floor and ceiling plates of an associated wall. The tool defines a blade one and one-half inches wide to correspond to the width of existing wall studs with a center measurable slot to overlie premarked stud indicating lines preformed on wall and floor plates of a wall to be constructed. The blade is positioned upon the indicating mark and scribed along both side edges of the blade to provide a one and one-half inch wide indicator line for positioning of a wall stud.
REFERENCES:
patent: 686240 (1901-11-01), Whitehill
patent: 784079 (1905-03-01), Stempel
patent: 799474 (1905-09-01), Larson et al.
patent: 964785 (1910-07-01), Johnson
patent: 3169320 (1965-02-01), Currie
patent: 4607438 (1986-08-01), DeFrange
patent: 4693011 (1987-09-01), Strayham
DePumpo Daniel G.
Gilden Leon
Shoap Allan N.
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