Prism pole for a surveying system

Details Prism pole for a surveying system Prism pole for a surveying system

1993-02-16

1993-10-26

Will, Thomas B.

Geometrical instruments

Straight-line light ray type

Rod or target

33296, G01C 1508

Patent

active

052554414

ABSTRACT:
The prism pole consists of an extensible aluminum pole that can be adjusted between a length of 30 and 47 inches. The pole has a hardened steel point on one end thereof and a prism assembly on its opposite end. The prism pole also has a steel point mounted to the prism assembly such that the pole can be turned "upside down" placing the prism assembly approximately 4 inches from the point being measured. To assist in plumbing the prism pole, two level vials are provided, the first being observable when the pole is in the upright position and the second being observable when the pole is in the upside down position.

REFERENCES:
patent: 2169533 (1939-08-01), Kasten
patent: 2972053 (1961-02-01), Anderson
patent: 4339880 (1982-07-01), Hall
patent: 4803784 (1989-02-01), Miller
patent: 4879816 (1989-11-01), Sierk
patent: 4899452 (1990-02-01), Schater

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