Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1995-07-19
1997-08-12
Fulton, Christopher W.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33371, 33376, G01C 928
Patent
active
056553099
ABSTRACT:
A construction tool for orienting the longitudinal axis of a tubular work piece perpendicular to the horizon (i.e. in a true vertical position) is disclosed. The tool comprises a concentric stack of tool sections increasing in external cross section area, similar in appearance to an upside down layered cake. The external cross section configuration of each succeeding plate is dimensioned to conform substantially with an interior cross section of various hollow tubular work pieces. Located at the center point the top tool section is a conventional bulls eye level. A trough is located in the sidewall of the tool parallel to a longitudinal axis of the tool. The cross section of the trough is dimensioned to conform substantially with the exterior of a hollow or solid tubular work piece.
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Fulton Christopher W.
Meier Harold E.
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