Dark-banded vial for use with level

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.

Description

FIELD OF THE INVENTION [0001] This invention is related generally to vials and, more particularly, to vials enclosing a bubble for use in levels. BACKGROUND OF THE INVENTION [0002] It has long been known to utilize the effect of gravity on fluids having different densities to determine the levelness of elements such as building components, machines, lines, poles, etc. Spirit levels, also called bubble levels, are well known instruments utilizing gravity in this way to set horizontal or vertical surfaces. Such levels include a sealed vial containing a bubble, typically air, floating in a non-freezing liquid, usually mineral spirits. The measured surface is considered horizontal or vertical when the air bubble rests between predetermined graduated marks on the vial. [0003] The accuracy with which a horizontal or vertical plane can be determined is critically dependent on the accuracy at which the bubble is centered between the transverse marks on the vial which, of course, is dependen...

AI Technical Summary

Benefits of technology

[0027] When using such a vial in the above method, the bands facilitate locating the bubble by reflecting off of the interface to increase visibility of the bubble. Such a method may be further enhanced by using bands which are symmetrical about the maximum diameter of the cavity. As discussed above, such bands may be opaque such that light does not pass through them o

Problems solved by technology

While the position of the bubble can readily be seen under normal lighting conditions, it becomes difficult to see on a heavily clouded day, or at dusk, or in poorly lighted spaces.

That is to say, typical conventional levels can be effectively used only in relatively well-lighted environments and, accordingly can put constraints on the times and places craftsmen such as carpenters and bricklayers are able to work efficiently.

Each of these prior art attempts have failed to provide a simple and inexpensive, yet successful method of overcoming bubble-locating prob

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