Sine bar for compound angles

Details Sine bar for compound angles Sine bar for compound angles

1990-01-08

1990-12-11

Haroian, Harry N.

Geometrical instruments

Gauge

Angle

G01B 350

Patent

active

049760459

ABSTRACT:
A simple, unique sine bar for facilitating measurement of compound angles characterized by the precise positioning of three spheres with respect to an upper plate upon which a workpiece is placed for inspection and measurement as to accuracy with respect to a compound angle cut thereon. A right angle corner of the sine bar defines an axis coincident with the center of the sphere thereat, whereby a trigonometric solution of the vertical distances defining the angle cut of the workpiece may be readily determined.

REFERENCES:
patent: 2111299 (1938-03-01), Robbins
patent: 2306227 (1942-12-01), Seidel
patent: 3243885 (1966-04-01), Johnson

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