Vertical sight adjuster
OwnerLeon Zalewskiinventor
Life of this patent
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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.
Claims3
A device for checking the verticality of a wall or the like, and comprising a plumb-bob having a generally frusto-conical configuration and defining an axial opening extending through the plumb-bob from its upper end to the lower end thereof, a plumb line received in said opening and knotted plate with a central hole for slidably receiving said plumb line, said plate having at least one pair of opposite sides which are parallel and each of which plate sides are slightly longer than the maximum outside diameter of said plumb-bob whereby said plate can be held with one of it's sides against the wall and with the plumb-bob hung therefrom so that the plate can be pivotally moved out of the horizontal to check for clearance between the plumb-bob and the wall, said plumb-bob diameter and said plate side length being so related that the plumb-bob will just touch a vertical wall when the plate is held at an angle in the range between 30-45 degrees relative to the horizontal.
Dependencies are inferred from the claim text.