Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1979-02-09
1980-11-04
Phillips, Charles E.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33366, G01C 504, G01C 922
Patent
active
042311632
ABSTRACT:
A pair of upright stands are provided and include enlarged bases by which the stands may be supported on variously elevated support surfaces. Each stand has a vertically elongated support mounted thereon for adjustable vertical positioning therealong and each stand has a scale thereon by which the positioning of the support therealong may be precisely determined and adjusted as desired. Each support includes an upstanding transparent tube section and the lower ends of the tube sections are connected by an elongated flexible connecting tube member including an expandable and contractable reservoir. One or both of the transparent tube sections may be provided with a float therein and the upper end of the float will have its position relative to its support and the position of its supporting liquid accurately determined either through the utilization of a scale supported from the upper end of the tube, a micrometer supported from the upper end of the support and/or a float actuatable switch carried by the upper end of the support. Further, one stand and the associated transparent tube may be omitted with the float actuatable switch provided on the retained transparent tube electrically connected to a signal generator provided for the remote end of the flexible connecting tube member.
REFERENCES:
patent: 2040708 (1936-05-01), Persson
patent: 2804692 (1957-09-01), Karstens
patent: 2838844 (1958-06-01), Sackett
patent: 3048927 (1962-08-01), Maloff
patent: 3269023 (1966-08-01), Calkins
patent: 3645135 (1972-02-01), Hadley
patent: 3849898 (1977-11-01), Turloff
Jacobson Harvey B.
O#Brien Clarence A.
Phillips Charles E.
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