Abstract: A method includes providing a collection of particulate material and forming a first article therefrom. Forming the first article includes forming an outer shell with an outer surface that defines an outer periphery of the first article; forming a relief area of the first article that supports the outer shell, including forming a relief void in the relief area; and collecting a collection of the particulate material within the outer shell during formation of the first article. Moreover, the method includes encasing the first article with an outer member. The outer member defines an internal cavity with an internal surface that corresponds to the outer surface of the outer shell. The method further includes heating, which deforms the first article selectively at the relief void.

Abstract: A method includes providing a collection of particulate material and forming a first article therefrom. Forming the first article includes forming an outer shell with an outer surface that defines an outer periphery of the first article; forming a relief area of the first article that supports the outer shell, including forming a relief void in the relief area; and collecting a collection of the particulate material within the outer shell during formation of the first article. Moreover, the method includes encasing the first article with an outer member. The outer member defines an internal cavity with an internal surface that corresponds to the outer surface of the outer shell. The method further includes heating, which deforms the first article selectively at the relief void.

Abstract: A pressure vessel joint for repeaters in submarine optical communication systems is described. The joint employs a breech ring which secures an endcap to the pressure vessel. The breech ring and pressure vessel have corresponding keys. The breech ring slides over the endcap and is rotated such that the breech ring keys engage the mating keys formed in the pressure vessel. The endcap is seated on a pre-loaded C-ring which seals the secured structure. Additional, redundant piston seals can also be provided to further prevent leakage.

Abstract: A pressure vessel joint for repeaters in submarine optical communication systems is described. The joint employs a breech ring which secures an endcap to the pressure vessel. The breech ring and pressure vessel have corresponding keys. The breech ring slides over the endcap and is rotated such that the breech ring keys engage the mating keys formed in the pressure vessel. The endcap is seated on a preloaded C-ring which seals the secured structure. Additional, redundant piston seals can also be provided to further prevent leakage.