Signal for industrial surveys

Details Signal for industrial surveys Signal for industrial surveys

1986-02-11

1987-02-24

Haroian, Harry N.

Geometrical instruments

Straight-line light ray type

Rod or target

G01C 1506

Patent

active

046446613

ABSTRACT:
"Three-conical" signal for industrial surveys stituted by a vertical transparent cylinder, inside which two conical axial cavities are excavated, unsymmetrical, opposite to each other, and painted in luminescent orange color, whose vertices are connected by a vertical cylindrical bore; said vertical cylinder is supported by a base which supports in its turn within the lower conical cavity a parabolic reflector and a lamp, and is provided atop with a conical cap axially provided with a small transparent vertical cylinder, ending with a sharp conical top, and being provided in its lower portion with a surface having the shape of a spherical cap.

REFERENCES:
patent: 2538475 (1951-01-01), Skrastin

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