Pipe joint intersection contour scriber

Details Pipe joint intersection contour scriber Pipe joint intersection contour scriber

1979-03-22

1981-07-14

Haroian, Harry N.

Geometrical instruments

Scriber

Curved surface

B43L 1310

Patent

active

042778948

ABSTRACT:
A novel pipe joint intersection contour scriber is disclosed for use in the art of welding pipes together at intersections which may or may not be perpendicular. The invention consists of a template connected by two rods to a three-disc assembly, one disc of which has a scriber sub-assembly. The three-disc assembly provides an adjustable clamp and centering function with the disc closest to the template containing the scriber sub-assembly which is allowed to rotate through 360.degree.. The scriber pen is connected by way of a sleeve to a wheel which rotates on the template causing the pen to trace the appropriate line. The scriber and wheel assembly is attached to the rotating disc by means of an adjustable three-piece section which functions to provide a means for adjusting the distance of the scriber pen from the center of its path of rotation and operates on the principal of a parallelogram, always maintaining the pen in the same orientation.

REFERENCES:
patent: 2389286 (1945-11-01), Watkins
patent: 2408517 (1946-10-01), Howard
patent: 2460412 (1949-02-01), Douglass
patent: 3442500 (1969-05-01), Fall

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