Vertical sight adjuster

Details Vertical sight adjuster Vertical sight adjuster

1980-04-29

1981-11-17

Stephan, Steven L.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

G01C 1510

Patent

active

043002900

ABSTRACT:
A device for checking the verticality of a wall includes a square plate with a side length somewhat longer than the diameter of a frusto-conical plumb-bob. A plumb line has one end connected to the plumb-bob, and the other end passed through an opening in the plate so that the user can grasp the excess line in his hand as he holds the plate with his other hand such that it can be tilted relative to the horizontal and/or the line used to raise and lower the plumb-bob as required to check for verticality of the walls surface.

REFERENCES:
patent: 1745027 (1930-01-01), Oxford
patent: 3766659 (1973-10-01), Quenot

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