Dark-banded vial for use with level

Details Dark-banded vial for use with level Dark-banded vial for use with level

2005-10-25

2005-10-25

Bennett, G. Bradley (Department: 2859)

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

C033S348000

Reexamination Certificate

active

06957494

ABSTRACT:
A vial, level including such vial, and method of using such level are disclosed. The vial comprises a body having first and second ends, a midpoint, and interior and exterior surfaces, at least one marker ring connected with respect to the body, a bubble positioned in the cavity and defined by an interface, and first and second dark-colored bands circumscribing the cavity. The vial enhances the visibility of the bubble through the reflection of the first and second bands on the interface such that the interface along the perimeter of the bubble appears dark-colored.

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