Patent ID: 9719858
Date: 2017-08-01
CPC Classifications: B23P,C30B,F27D,G01J,Y10T

Claim:
1. An apparatus, comprising: a first plate having a first aperture; a second plate having a second aperture, the second plate attached to the first plate such that the first and second apertures are substantially aligned, wherein the first and second plates, when attached, define a cavity from an outer edge of at least one of the first or second plates to the substantially aligned apertures, and wherein the first and second plates, as attached, are configured to attach to a viewport of a container; a window containment arm pivotally affixed to at least the first plate and configured to substantially fit and pivot into and out of the cavity; and a window contained within the window containment arm, wherein the window is positioned the window containment arm such that the window substantially aligns with the first and second apertures when the window containment arm is fully pivoted into the cavity, wherein the window is accessibly located outside of the cavity when the window containment arm is pivoted out of the cavity.