Geometrical instruments – Scriber – Curved line
Reexamination Certificate
2008-07-03
2010-11-02
Fulton, Christopher W (Department: 2841)
Geometrical instruments
Scriber
Curved line
Reexamination Certificate
active
07823294
ABSTRACT:
An improvement in a compass that marks large radius arcs is disclosed. The compass is for marking on flat surfaces like the ground and walls where higher degree of accuracy for the radius or circle is desired. More particularly, the present flat compass allows a person to create a virtually unlimited radius arc using a center point and a rigid arm with a marking tip. The flat compass uses a rigid flat ruler with an embeddable anchor, such as a nail, on one end and a marking tip on the other that keeps the rigid arm essentially parallel with the marking surface as the surface is being marked. The marking tip is movable along the length of the rigid flat ruler. Multiple rulers can be connected to increase the size of the arc that will be drawn.
REFERENCES:
patent: 948172 (1910-02-01), Ide
patent: 983830 (1911-02-01), Manz
patent: 1005827 (1911-10-01), Gombarts
patent: 1282020 (1918-10-01), Anderson
patent: 1572237 (1926-02-01), Hunt
patent: 2419752 (1947-04-01), Zumbuhl
patent: 2581858 (1952-01-01), Butterworth et al.
patent: 2681507 (1954-06-01), Underwood
patent: 2699607 (1955-01-01), Woodward
patent: 2768443 (1956-10-01), Chiaravalloti
patent: 2818644 (1958-01-01), Crawford
patent: 2976614 (1961-03-01), Matuszewski et al.
patent: 3430347 (1969-03-01), Minniear
patent: 4334360 (1982-06-01), Burns et al.
patent: 4616418 (1986-10-01), Wade, III
patent: 5033197 (1991-07-01), Irvello
patent: 5497558 (1996-03-01), Wagner
patent: 5651184 (1997-07-01), Tutty
patent: D572611 (2008-07-01), Contreras
patent: D584971 (2009-01-01), Contreras
patent: 2003/0182811 (2003-10-01), Hairapetian
Buhler Kirk A.
Buhler & Associates
Fulton Christopher W
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