Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1978-10-06
1980-05-27
Phillips, Charles E.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33369, 33392, 33401, G01C 912
Patent
active
042043344
ABSTRACT:
A precision level, plumb and angle indicating device responsive to static gravity which has a hollow square frame provided with substantially equal parallel planar surfaces arranged with permanent magnet blocks embedded within each corner for abutting against a horizontal or vertical plane of an object, particularly a machine tool, for determining and/or orienting angles of inclination, as well as establishing level or plumb references to as close a tolerance as one sixtieth of an angular degree(minute). A circular plate or disk and a disk ring with indicia or graduations and corresponding numerals, adjustably disposed within an annular frame selectively rotatable about an opening at the front of said hollow square frame, cooperates with indicating pointers operatively affixed on shafts centrally located within the aforementioned circular plate or disk with degree graduations, and said disk ring displays minute graduations. Said invention is operatively responsive to gravitational force belt on said weight through gears and shafts arrangement enclosed within a chamber of said hollow frame. A drop line incorporated with a plumb point are provided for checking vertical plumb, and an attachment is also provided for checking line level, that is, the level between two distant points.
REFERENCES:
patent: 767188 (1904-08-01), Warner
patent: 2541880 (1951-02-01), McMillan et al.
patent: 2596422 (1952-05-01), Miller
patent: 2611189 (1952-09-01), Bello
patent: 3241245 (1966-03-01), Levine
patent: 3299523 (1967-01-01), Lea
patent: 3427724 (1969-02-01), Tracy
Branscomb Ralph S.
Phillips Charles E.
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