Self-adjusting level for determining leveling between two distan

Details Self-adjusting level for determining leveling between two distan Self-adjusting level for determining leveling between two distan

1995-10-13

1997-09-16

Bennett, G. Bradley

Geometrical instruments

Straight-line light ray type

Level

33391, 33275R, G01C 502

Patent

active

056667361

ABSTRACT:
A self-adjusting level for determining the leveling between two distant points is disclosed. It mainly contains a main body and a light beam indicator. The main body contains a flame having two oppositely disposed supporting arms, a disc-like base disposed below said main body, and a 360-degree rotatable graduated angle-measuring disc disposed between said base and said frame. The light beam indicator includes: (a) an outer ring rotatably connected to and between said two supporting arms of said frame of said main body via two outer ring shafts so that said outer ring is allowed to freely rotate about said outer ring shafts, (b) an inner shaft being rotatably connected at both ends thereof to said outer ring and extending along a diameter of said outer ring so as to rotate in a direction normal to a rotating direction of said outer ring, (c) at least one light beam generator disposed inside said inner shaft for generating at least one light beam which emits from at least one end of said inner shaft, and (d) a plummet hanging from a central recess formed on said inner shaft. The plummet is provided with a battery means in an internal portion thereof to supply power to said light beam generator without affecting a motion of either of said inner shaft or said outer ring.

REFERENCES:
patent: 732258 (1903-06-01), Belyeu
patent: 784511 (1905-03-01), Belyeu
patent: 925058 (1909-06-01), Wain
patent: 1278575 (1918-09-01), Berg
patent: 1820187 (1931-08-01), Gaynor
patent: 2571287 (1951-10-01), Peters
patent: 3857639 (1974-12-01), Mason

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