Metal stub and ceramic body electrode assembly

• US 4,450,061 A
• Filed: 12/20/1982
• Issued: 05/22/1984
• Est. Priority Date: 12/20/1982
• Status: Expired due to Fees

• Current Assignee: Aluminum Company of Egypt
• Original Assignee: Aluminum Company of Egypt
• Inventors: Rolf, Richard L.
• Primary Examiner(s): Williams, Howard S.
• Assistant Examiner(s): Williams, T. L.
• Application Number:
  US06/451,068
• Time in Patent Office: 519 Days
• Field of Search: 204/288, 204/289, 204/286, 204/297 R, 204/291
• US Class Current: 204/288.2
• CPC Class Codes: C25C 3/12 Anodes
• CPC Class Codes: C25C 7/025 used in cells for the electrolysis of melts

Abstract

An electrically conductive ceramic electrode body having an opening therein is threadably engaged with a metal stub having at least a slot therein to provide space for expansion of the stub without damage to the electrode body.

Claims

1. An electrode assembly comprising:

an electrically conductive ceramic electrode body having an opening therein;

a metal stub comprising a cup having an end wall and a side wall projecting upwardly therefrom at least partially within the body opening and attached to said body opening with attaching means; and

expansion and contraction means within said stub to allow said stub to expand and contract without cracking or otherwise fracturing said body.

2. An assembly as described in claim 1 wherein said metal stub further comprises a rod projecting upwardly from a central portion of the end wall.

3. An assembly as described in claim 1 wherein the attaching means comprises a continuous thread on the exterior of the side wall, the thread adapted to engage with a continuous groove in the side wall defining the opening in said stub.

4. An assembly as described in claim 1 wherein said expansion and contraction means comprises at least one slot in the side wall, the slot extending upwardly from the end wall.

5. An assembly as described in claim 1 wherein said expansion and contraction means comprises at least one slot in the end wall extending radially from a central portion of the end wall.

6. An electrode assembly comprising:

an electrically conductive ceramic electrode body having a circular opening therein with a continuous spiral groove in a substantially vertical side wall defining the opening;

a metal stub at least partially within the body opening, said stub having a circular end wall, a substantially vertical side wall projecting upwardly from the end wall with the side wall having a continuous spiral thread projecting outwardly therefrom and in engagement with the groove in the body opening; and

at least one slot in the side wall of said stub, the slot projecting upwardly from the end wall.

7. An assembly as described in claim 6 which further comprises at least one slot in the end wall of said stub, the slot projecting outwardly from a central portion of the end wall.