Patent ID: 8337314

Claim:
A button assembly comprising: a light emitting device configured to emit light; a lens cap configured to protect the light emitting device from being damaged; the lens cap having a top surface, a first cap side, a second cap side, a third cap side, and a fourth cap side; the second cap side connected to the first cap side, the third cap side connected to the second cap side, and the fourth cap side connected to the first cap side and the third cap side to form a plane; wherein the plane passes through a portion of the first cap side, a portion of the second cap side, a portion of the third cap side, and a portion of the fourth cap side; wherein a first perpendicular distance between the plane and a first point on the top surface is different than a second perpendicular distance between the plane and a second point on the top surface; and a button housing configured to receive at least a portion of the lens cap, the button housing having a threaded portion configured to prevent a liquid from entering from outside the button assembly to within the button assembly.