Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1995-02-01
1996-11-19
Fulton, Christopher W.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33285, 33291, 33370, G01C 500, G01C 910, G01C 1510
Patent
active
055750737
ABSTRACT:
An apparatus for setting a level plane includes a spirit level having a parallelepiped shaped housing with a measuring base and a leveling plate with an upper plate surface on which the base of the housing of the level is disposed. The upper plate of the leveling plate may be tilt orientation adjusted with respect to a lower plate that is spaced away from the upper plate by adjustment screws between the upper and lower plates. The upper plate includes a ferromagnetic material and a pivot pin projecting up from it. The spirit level housing has a hole in which the pivot pin is disposed enabling the housing to be pivoted around the surface of upper plate. A retaining magnet in the housing in the region of the measuring base holds the housing to the upper plate. Alternatively, the spirit level housing has the ferromagnetic material while the magnet is in the upper plate. Alternatively, also, the housing includes the pin while the hole is in the upper plate. Pivot the housing to an orientation whose level is to be set and then adjust the adjusting screws for obtaining a horizontal setting. Doing this at several pivot orientations enables the upper surface of the upper plate to be set horizontal using the level.
REFERENCES:
patent: 368308 (1887-08-01), Richardson
patent: 753149 (1904-02-01), Lankford
patent: 1270074 (1918-06-01), Veenstra
patent: 1836137 (1931-12-01), Theis
patent: 4221483 (1980-09-01), Rando
patent: 4593475 (1986-06-01), Mayes
patent: 4745689 (1988-05-01), Hiltz
patent: 5063679 (1991-11-01), Schwandt
Fulton Christopher W.
Stabila Messgerate Gustav Ullrich GmbH & Co. KG
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