Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1979-02-26
1980-06-03
Phillips, Charles E.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33374, G01C 928
Patent
active
042054540
ABSTRACT:
A combined distance and gradient gauging device is disclosed, including a base member, and at least one arm member slideably connected with said base member for parallel longitudinal displacement between collapsed and fully extended positions relative thereto, respectively, characterized in that the arm member is manually displaceable between a plurality of predetermined longitudinally displaced intermediate positions, relative to the base member so that the remote end extremities of the base and arm members are spaced at corresponding predetermined gauge distances, respectively. A spring-biased detent member is connected with one end of the base member adjacent one longitudinal surface of the arm member for selective cooperation with one of a plurality of longitudinally spaced recesses contained in the adjacent longitudinal surface of the arm member, thereby to retain the arm member in a selected one of a number of predetermined incremental distance gauging positions between the collapsed and fully extended positions. Second arm and cooperating detent members may be provided to increase the distance gauging capabilities of the device. An adjustable gradient indicator is provided for indicating a plurality of angular orientations of the device, relative to a reference plane, for variable distance - angular measuring operations.
REFERENCES:
patent: 686360 (1901-11-01), Smiddy et al.
patent: 1224165 (1917-05-01), Hansen
patent: 2304313 (1942-12-01), Misz
patent: 3104477 (1963-09-01), Edwill
Phillips Charles E.
Semmes J. Gibson
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