US 2007/0137055 A1Published application

Compass

OwnerJui-An Tsaiinventor

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Abstract

A compass including a container for liquid, a floating body, a vertical shaft, a pointer and an ornament such as pens is disclosed. The container is disposed horizontally with an axial hole on top surface thereof while the floating body such as a pen holder floats on liquid inside the container. The vertical shaft vertically arranged on a center line of the floating body. Moreover, the vertical shaft inserts through the axial hole and connects with an extension rod. The pointer and the ornament are further loaded on the extension rod. A magnetized bar is transversely disposed on the floating body or the vertical shaft and a central point of the magnetized bar aligns the center line of the floating body so that the S pole of the magnetized bar faces the direction that the pointer indicates. By the buoyancy generated of the floating body and the guidance of the axial hole, the magnetized bar with a central shaft suspends freely so as to align itself accurately with earth's magnetic field and further drive the pointer or the ornament. Thus the present invention has both functions of direction indication and decorative effect.

Claims10

Dependent claims

A compass comprising a container for liquid, a floating body, a vertical shaft, a magnetized bar, a pointer and an ornament, wherein

the container for liquid is a housing disposed horizontally with a liquid therein and an axial hole on top surface thereof;
the floating body is a hollow enclosed shell that floats on the liquid inside the container, having a center line;
the vertical shaft is arranged on a center line of the floating body and is inserted through an axial hole on top surface of the container, connecting with an extension rod while the diameter of the vertical shaft is a bit smaller than that of the axial hole so that the vertical shaft move vertically inside the axial hole;
the magnetized bar is transversely disposed inside the floating body, the vertical shaft or the extension rod and a central point of the magnetized bar aligns the center line of the floating body;
and
the pointer is loaded on the vertical shaft or the extension rod of the floating body and the direction that the pointer indicates faces S pole of the magnetized bar so that the pointer moves along with the magnetized bar;
thereby the magnetized bar having a central shaft suspends freely so as to align itself accurately with earth's magnetic field and further drive the pointer or the ornament.

4 more elements

Dependencies are inferred from the claim text.