Geometrical instruments – Gauge – Angle
Patent
1990-03-02
1991-05-28
Haroian, Harry N.
Geometrical instruments
Gauge
Angle
G01B 350
Patent
active
050182773
ABSTRACT:
A device is disclosed where, for various purposes, a substantial range of the angular relationship between two flat surfaces must be quickly, easily and accurately established and maintained. The device has three component corresponding ends of which are interconnected by a common pivot with each of the first and second members having one of the flat surfaces. The first and third members are detachably interconnected in a series of angle establishing position increasing from a zero position by regular increments in the disclosed embodiment of the invention, of one degree to a maximum of nine degrees. The second and third components are detachably interconnected in a like manner providing a zero position and a series of angular relationships increasing by an increment, in the disclosed embodiment, of 10.degree. to a maximum of forty degrees. In both cases, the detachable connections consist of a series of bores through selected, aligned bores of which a holding member, a bolt in the disclosed embodiment is inserted. When both zero positions are established, both surfaces are parallel as the selected polar starting position. In the disclosed embodiment, fractions of degrees are established by clamping the third component to the first component in a manner enabling the former to pivot relative to the axis of the pivot through an arc of ten degrees with the connection between the second and third set at zero position or whatever angular relationship is wanted and with the wanted fraction of a degree determined by the use of a sine bar or other precision angle measuring device held against the flat surface of the second component.
REFERENCES:
patent: 2366385 (1945-01-01), Comfort
patent: 2567517 (1951-09-01), Keebler
patent: 3166853 (1965-01-01), Marcus
patent: 3736666 (1973-06-01), Sutter
patent: 3848865 (1974-11-01), Bird
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