Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1998-07-15
2000-07-18
Gutierrez, Diego
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33333, G01C 900, G01C 918
Patent
active
060889225
ABSTRACT:
A method and apparatus for hydrostatic leveling including a pair of liquid filled containers connected by a liquid hose for equalizing static pressure in the mercury pools in the indicating heads and a gas hose for equalizing the gas or vapor pressure within the heads above the mercury. Each head has an internal float with a display gauge. The indicating heads have identical structures and thus when they are resting on the level surface they may be reversed in location without change in gauge indicator reading; any difference in the reading is a measure of out-of-level condition. An elevator is used to support one head while a mobile tool is used to support the other head. The elevator comprises a rigid body that is secured to a stable structure adjacent the object to be leveled and includes a vertically displacable set-off for supporting the head. The mobile tool includes a level system for insuring consistent alignment of the head to the object being leveled. When used, the second head is placed on the tool and both are leveled against the object. The first head on the elevator set-off is then vertically displaced until level with the second head by rotating a screw-jack on the elevator. When both heads read identically, they are in the same plane and a reference measurement is obtained from an associated digital meter. Subsequent measurements are taken by moving the mobile tool about the object periphery and leveling the second head at the new position. The first head is then vertically displaced until both heads are level and in the same horizontal plane. The elevation or position of the new position is measured from the original starting position or the reference point by the meter and this vertical variance is recorded. Several variances may be compiled to form a profile for subsequently leveling the object.
REFERENCES:
patent: 2814127 (1957-11-01), Blatchford
patent: 3212195 (1965-10-01), Paarma
patent: 3577645 (1971-05-01), Zurawski
patent: 4169320 (1979-10-01), Bennett
patent: 4231163 (1980-11-01), Turloff
patent: 4384410 (1983-05-01), Melugin et al.
Francis Faye
Gutierrez Diego
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