Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1985-03-01
1986-08-12
Stearns, Richard R.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33388, 33530, G01B 524, G01C 928
Patent
active
046048120
ABSTRACT:
A pitch and angle measuring instrument including three basic elements; a base, a main dial and an elongated pointer. The base includes a bottom portion which is designed to rest on a pipe or other item for which the angle or pitch is desired to be measured. An upper portion extends upward from the lower portion and has a first calibrated scale thereon. The main dial member is rotatedly affixed to the base and extends upward therefrom. A second calibrated scale is located on the main dial member. The elongated pointer is also rotatively connected to the base about the same pivot point as the main dial member. The pointer includes a level indicator. The first and second calibrated scales are arcuate having the same center point. However, the radius of the arc formed by the second scale is greater than the radius of the arc formed by the first scale. The pointer includes means to indicate a reading on both of the scales when the level indicator is at a level position. The second calibrated scale has graduations of smaller units than the first calibrated scale. The second calibrated scale is employed to measure angles which fall between the graduations of the first calibrated scale.
REFERENCES:
patent: 1641243 (1927-09-01), Wochner
patent: 2295184 (1942-09-01), Sandbo
patent: 2423317 (1947-07-01), Holton
patent: 2961771 (1960-11-01), Fronek
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