# US 8,539,688 B2 · Translucent ball cavity cube vial

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- Number: US 8,539,688 B2
- Document ID: US8539688B2
- Status: Granted
- Kind: B2
- Application number: 13/051,101
- Filed: 2011-03-18
- Published: 2012-03-22
- Granted: 2013-09-24
- Earliest claimed: 2010-04-19
- Assignees: Vernon K. Wing
- Applicants: Vernon K. Wing
- Inventors: Vernon K. Wing
- Web page: https://patentgrep.com/patent/US8539688B2

## CPC

- G01C 9/36: of the spherical type, i.e. for indicating the level in all directions
- G01C 9/32: Means for facilitating the observation of the position of the bubble, e.g. illuminating means
- G01C: MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY (measuring liquid level G01F; radio navigation, determining distance or velocity by use of propagation effects, e.g. Doppler effects, propagation time, of radio waves, analogous arrangements using other waves G01S)

## Abstract

A ball cavity cube vial comprising a cube made of an at least translucent material, and having a sealed ball cavity in its center, said ball cavity being incompletely filled with a liquid medium such that a bubble is left inside of said ball cavity; and markings associated with said cube, said markings being calibrated to function as reference points for said bubble.

## Claims

### Claim 1

An artifact comprising:
a cube made of an at least translucent material, and having a sealed ball cavity in its center, said ball cavity being incompletely filled with a liquid medium such that a bubble is left inside of said ball cavity;
a freely floating globe inside said ball cavity; and
markings associated with said cube, said markings being calibrated to function as reference points for said bubble and the globe.

### Claim 2 (depends on 1)

The artifact of claim 1, wherein said material is transparent.

### Claim 3 (depends on 1)

The artifact of claim 1, wherein said liquid medium is an alcohol.

### Claim 4 (depends on 1)

The artifact of claim 1, wherein said markings are indicating degrees.

### Claim 5 (depends on 1)

The artifact of claim 1, further comprising a footing base.

### Claim 6 (depends on 1)

The artifact of claim 1, wherein the globe is magnetized, marked and calibrated to show direction relative to Earth's magnetic poles.

### Claim 7 (depends on 1)

The artifact of claim 1, further comprising a ball bearing, made of a material having greater density than that of said liquid medium, and wherein, said ball bearing is rolling freely inside said ball cavity.