Geometrical instruments – Indicator of direction of force traversing natural media – Borehole direction or inclination
Patent
1982-06-16
1984-08-28
Martin, Jr., William D.
Geometrical instruments
Indicator of direction of force traversing natural media
Borehole direction or inclination
33402, E21B 47022, G01C 914
Patent
active
044675267
ABSTRACT:
Inclination measurement apparatus having a housing, a reference pendulum mounted for swinging about one axis of the housing to respond to deviation of the housing means about such axis, an inclination indicator responsive to the inclination of such housing about another axis, and connected to such reference pendulum, whereby to adopt a predetermined reference position relative to such first axis, a movable locking device operable to restrain movement of such inclination indicator about such transverse axis and being releaseable to permit such movement, the locking device being movable into and out of engagement with the indicator device to secure such indicator device against movement about such transverse axis.
REFERENCES:
patent: 2879032 (1959-03-01), Whittle
patent: 2963099 (1960-12-01), Gianelloni
patent: 4389792 (1983-06-01), Fuchs
Martin, Jr. William D.
Rolston George A.
Techdel International Inc.
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