Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1981-02-23
1982-08-10
Phillips, Charles E.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
24299, G01C 928, G01C 936
Patent
active
043430937
ABSTRACT:
A measuring instrument is disclosed that is to be attached to an object that is to be plumbed so as to free both hands of the user for positioning and securing the object while the user maintains a visual check on the bubble level for precise plumbness. This plumb tool invention comprises a body member having a pair of right-angular arms for use in engaging the object that is to be plumbed. A ledge projects from one arm and supports an orbital bubble level. A bead chain is attached at one end to the body member and adapted to encircle an object that is to be plumbed. There is a keeper for engaging the bead chain along the length thereof for mounting the plumb tool to the object being plumbed with a quick-attachment and quick-release capability.
REFERENCES:
patent: 312266 (1885-02-01), Gurley
patent: 3729778 (1973-05-01), McGrath
patent: 3826013 (1974-07-01), Baker
Caslin Richard L.
Phillips Charles E.
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