Geometrical instruments – Straightedge type – Combined with level
Patent
1994-08-12
1995-09-26
Cuchlinski, Jr., William A.
Geometrical instruments
Straightedge type
Combined with level
33423, 33418, B43L 712, G01C 1700
Patent
active
054525225
ABSTRACT:
A framing layout tool includes two squares each with two legs or blades 90.degree. apart. The squares are pivotally attached at their vertices by a pivot pin including a knurled locking nut. One of the squares includes a longitudinally aligned electronic plumb and level indicator on one of the legs. The other leg of that square includes indicia on a leg reference edge for indicating rise-over-run integers representative of the angular separation of that other leg and a leg of the other square. Indicia indicating the actual angle between such legs is also contained on an opposite reference edge of that other leg. The layout tool has particular utility for accurately marking the location of a plumb cut, seat cuts and a ridge cut in roof rafters where the blade of the second square is placed on an inclined rafter and oriented with the electronic level in a vertical plumb position. When a visual and auditory indication of exact plumb is obtained the clamping nut is locked. Using the locked device, the angle of inclination can be read and locked unit used to scribe cutting lines on a rafter to have the same inclination as the first measured rafter.
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Mayes Selling Card, Mayes Brothers Tool Mfg. Co., Johnson City, Tenn. (2 sides). Pre-Aug. 1994.
Inogon Brochure, Borel & Dunner, Inc., Novi, Mich. (2 sides). Pre-Aug. 1994.
Wedge Innovations Brochure, Santa Clara, Calif. (2 sides). Pre-Aug. 1994.
Zircon Corporation Advertisement (2 pages). Pre-Aug. 1994.
Grundstrom Douglas R.
Kook Donald D.
Schultheis Gary R.
Stauss John R.
Bennett G. Bradley
Cuchlinski Jr. William A.
Zircon Corporation
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