Combination range pole and bubble-level therefor

Details Combination range pole and bubble-level therefor Combination range pole and bubble-level therefor

1988-10-24

1989-11-14

Haroian, Harry N.

Geometrical instruments

Straight-line light ray type

Rod or target

G01C 1506

Patent

active

048798169

ABSTRACT:
A surveyors' range pole comprises a bubble level that is attached to the web of a length of channel. When the pole sections are assembled a threaded pin of one of the sections is passed through a hole in the web, locking the channel between two sections.

REFERENCES:
patent: 723351 (1903-03-01), Abbee
patent: 2096638 (1937-10-01), Higgins
patent: 2245901 (1941-06-01), Chaskin
patent: 2794263 (1957-06-01), Cranmer
patent: 2972415 (1961-02-01), Rensch
patent: 3595209 (1971-07-01), Parker
patent: 3855710 (1974-12-01), Lunden

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