Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1997-01-15
1998-01-06
Will, Thomas B.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
G01C 906
Patent
active
057041300
ABSTRACT:
An optical measuring system to indicate or determine the relative position of an object and/or a substrate in relation to a horizontal plane comprises an at least partially transparent measuring chamber containing two non-miscible media with different densities, one of the media being at least partially transparent or translucent and at least the other being a fluid medium. The relative position is found on the basis of the position of the at least partially transparent or translucent medium in the measuring chamber, when what is concerned is an optical instrument operating on the principle of a spirit level. On one side of the measuring chamber is a light source and on the opposite side there is an optical measuring cell or a flat, light-sensitive sensor. The light transmitted from the light source through the at least partially transparent or translucent medium is projected on the optical measuring cell or the flat, light-sensitive sensor and the projection is used to determine the relative position of the object in relation to the horizontal.
REFERENCES:
patent: 3009255 (1961-11-01), Robillard
patent: 3164023 (1965-01-01), Holderer
patent: 4060910 (1977-12-01), Gell, Jr.
patent: 4861981 (1989-08-01), Winiger
patent: 5101570 (1992-04-01), Shimura
patent: 5148018 (1992-09-01), Ammann
Augustin Victor
Fischer Eduard
Raytec AG
Will Thomas B.
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