Simply-constructed instrument for measuring horizontal line,...

G - Physics – 01 – B

Patent

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Details

G01B 13/18 (2006.01) G01C 9/20 (2006.01)

Patent

CA 2052262

An instrument for measuring angles, vertical line or horizontal line includes a square casing having two axial lines crossing at a center of the casing and having a colored liquid filled in the casing, and a rotating disc rotatably mounted on the casing, in which the rotating disc is formed with an upper half circle portion radially formed with a plurality of angular graduations in terms of degrees, and formed with a lower half circle portion having two vertical columns parallelly formed below a diametrical line dividing the two half circle portions, and at least a reference line linked between any two horizontal graduations respectively formed in the two vertical columns, whereby upon a rotation of the disc to parallel the reference line to a liquid level of the coloured liquid, an angle can be obtained by matching the angular graduation with any one axial line when the casing is laid on or coincided with a plane to be measured.

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