Geometrical instruments – Miscellaneous – Light direction
Reexamination Certificate
2005-02-15
2005-02-15
Fulton, Christopher W. (Department: 2859)
Geometrical instruments
Miscellaneous
Light direction
C033S412000, C033S529000
Reexamination Certificate
active
06854190
ABSTRACT:
A special offset calculator for determining the angle of a pipe fitting. The special offset calculator includes a background sheet having an offset value table with offset values representing various offset distances between two pipes to be connected. A transparent fitting sheet has printed lines which represent center line dimensions of fittings to be used in conjunction with an ell fitting or T-fitting with unknown angle to be determined in order to make the special offset. In use, the fitting sheet is positioned on the background sheet, with designated points on both sheets aligned with each other. After the required offset distance value is found on the background sheet, the fitting sheet is rotated or pivoted until the correct fitting size on the fitting sheet matches the offset distance value on the background sheet.
REFERENCES:
patent: 2658672 (1953-11-01), Dalzell
patent: 2802278 (1957-08-01), Knefel
patent: 2899750 (1959-08-01), Becroft
patent: 3195233 (1965-07-01), Brocklander
patent: 20020092191 (2002-07-01), Hauzle, Jr.
Fulton Christopher W.
Gold Glenn E.
Gold & Rizvi P.A.
Rizvi H. John
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