Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1998-02-23
2000-03-07
Bennett, G. Bradley
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33371, G01C 912
Patent
active
060323760
ABSTRACT:
A pendulum line level is presented which makes reading the level easier and which allows a workman to utilize a level that is calibrated in degrees. The level is essentially rectangular and has two rotating dials in the body of the level. These dials rotate freely about a pivot point. Each disc has a pair of horizontal and vertical, perpendicular pointers which are used to determine when the level is in horizontal alignment with the ground. A calibrated scale located just outside the upper left quadrant of the left disc and just outside the lower right quadrant of the right disc allows the workman to read discreet angles of orientation. A second embodiment of the device has a gate with another pair of dials which swings perpendicular to the main body of the pendulum level. This second set of perpendicular dials allows the workman to determine when the main body of the level is in a vertical plane and to determine at which angle the main body of the level may be oriented.
REFERENCES:
patent: 988888 (1911-04-01), Meier et al.
patent: 1003863 (1911-09-01), Arnst
patent: 1441350 (1923-01-01), Herrman
patent: 1523315 (1925-01-01), Tone
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patent: 4593475 (1986-06-01), Mayes
patent: 4745689 (1988-05-01), Hiltz
patent: 4747217 (1988-05-01), Austin
3-Directional Folding Precision Level (advertisement), "Popular Mechanics," p. 296, Dec. 1949.
Bennett G. Bradley
Weber Don W.
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