Geometrical instruments – Gauge – Proportional line segmenter
Reexamination Certificate
1999-05-20
2001-06-12
Fulton, Christopher W. (Department: 2859)
Geometrical instruments
Gauge
Proportional line segmenter
C033S494000, C033S562000
Reexamination Certificate
active
06243963
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to a dividing rule for partitioning a workpiece into a number of equal parts.
BACKGROUND OF THE INVENTION
Dividing a workpiece into a number of equal parts is usually done by placing a ruler askew on the workpiece and eyeballing pencil locations against the inch marks. Measuring devices equipped with holes for inserting a pencil or other marking tool to mark the correct position on the workpiece have also been used. For instance, diamond shaped as well as circular holes have been used in framing squares. More recently, holes have been used in the Veritas® Sliding Square and in Incra® brand perforated measuring tools. The difficulty, however, in correctly positioning the ruler or other measuring instrument and holding it in place leads to marking errors that jeopardize the accuracy of the division.
SUMMARY OF THE INVENTION
This invention is a dividing rule that allows the user to divide a workpiece into equal divisions with heightened accuracy and ease. The dividing rule is a plate with pivoting pins attached at its corners. Position indicia, such as holes, are spaced along the plate, dividing the edges of the plate into halves, thirds, quarters, fifths, sixths, sevenths, eighths, ninths and tenths (other numbers of divisions are also possible). Each hole is numbered with its coinciding division for easy identification.
The pins have flat faces so that, when using the rule, the flat faces of opposing pins are positioned against opposing edges of the workpiece. This helps hold the rule firmly in position to ensure that the accuracy of the division process is not compromised. Once the plate is properly positioned, the user simply uses a pencil or other marking device to mark the holes that coincide with the number of desired divisions. Once the holes are marked, the user can use a straight edge of the plate or a square to draw the dividing lines.
REFERENCES:
patent: 663053 (1900-12-01), Wangler
patent: 827792 (1906-08-01), Edmondson
patent: 1810392 (1931-06-01), Clark
patent: 2612690 (1952-10-01), Cotton
patent: 2677186 (1954-05-01), Sorensen
patent: 2764818 (1956-10-01), Gard
patent: 3271869 (1966-09-01), Ratner
patent: 3885316 (1975-05-01), Casten
patent: 4731931 (1988-03-01), Goodman et al.
patent: 5615485 (1997-04-01), Stoneberg
Lee Valley & Veritas 1997/1998 catalog, 20th Anniversary Issue, p. 9 item A; p. 11 items G, H, & J; and p. 12, item E.
Jones Steve K.
Saunders Terry Ross
Fulton Christopher W.
Johnson Kristin L.
Kilpatrick & Stockton LLP
Lee Valey Tools, Ltd.
Pratt John S.
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