Geometrical instruments – Straightedge type – Plural straightedges – relatively moveable
Patent
1993-03-29
1995-12-12
Will, Thomas B.
Geometrical instruments
Straightedge type
Plural straightedges, relatively moveable
33534, 33640, 834713, 8352217, B43L 710, B26D 701
Patent
active
054738210
ABSTRACT:
A parallelogram tool for measuring exterior and interior angles is used in conjunction with a miter saw having a pair of pivotally mounted guide blocks. The tool is made of six link members that are pivotally interconnected to one another. One of the pivotal connections may be tightened to lock the tool into position after a measurement has been made, and at least one pivotal connector extends below the plane of the tool. The locked tool is then transferred to the flat plate of a miter saw having a pair of arcuate slots formed in it in bilateral relation to one another and having a central diametrically extending slot. The central slot receives the pivotal connector that extends below the plane of the tool. The arcuate slots guide a pair of pivotally mounted guide blocks which are placed into abutting relation to the measuring arms of the tool and then locked into position. The tool is then removed and items to have a miter cut formed in them are placed against the guide blocks. A miter saw then performs the cuts.
REFERENCES:
patent: 361243 (1887-04-01), Struble
patent: 1660578 (1928-02-01), Reppell
patent: 2222853 (1940-11-01), Neurohr
patent: 3562919 (1971-02-01), Green
patent: 4002329 (1977-01-01), Petrowski
patent: 4328728 (1982-05-01), Ferdinand
patent: 4464962 (1984-08-01), Myhre
patent: 4527341 (1985-07-01), Schon
patent: 4881437 (1989-11-01), Macksoud
patent: 5220857 (1993-06-01), Freeburger
Miller Stanley M.
Will Thomas B.
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