Control system

• US 2,998,371 A
• Filed: 05/09/1958
• Issued: 08/29/1961
• Est. Priority Date: 05/09/1958
• Status: Expired due to Term

• Current Assignee: Rolland C. Sabins
• Original Assignee: Rolland C. Sabins
• Inventors: Sabins, Rolland C.
• Application Number:
  US03/734,322
• Time in Patent Office: 1,208 Days
• US Class Current: 204/196.02
• CPC Class Codes: C23F 13/04 Controlling or regulating desired parameters

Claims

1. IN A CONTROL SYSTEM FOR CATHODICALLY PROTECTING A STRUCTURE IMMERSED IN AN ELECTROLYTE, AN ANODE IMMERSED IN THE ELECTROLYTE, SATURABLE CORE REACTOR AMPLIFICATION MEANS CONNECTED TO SAID ANODE AND SAID STRUCTURE TO IMPRESS A CURRENT FLOW BETWEEN THE ANODE AND THE STRUCTURE TO CAUSE THE STRUCTURE TO SERVE AS A CATHODE, AND REFERENCE MEANS IMMERSED IN THE ELECTROLYTE, THE REFERENCE MEANS HAVING A RELATIVELY CONSTANT POTENTIAL IN THE ELECTROLYTE WHICH DIFFERS FROM THE POTENTIAL OF SAID STRUCTURE TO BE CATHODICALLY PROTECTED SO THAT THERE IS A REFERENCE CURRENT FLOW BETWEEN THE STRUCTURE AND THE REFERENCE MEANS, A METER HAVING A POINTER AND AN OPENING ADAPTED TO BE CLOSED BY THE POINTER, SAID METER BEING RESPONSIVE TO THE REFERENCE CURRENT FLOW BETWEEN THE STRUCTURE AND THE REFERENCE MEANS, A LIGHT SOURCE ADAPTED TO SHINE THROUGH THE OPENING OF SAID METER AND BEING IN A POSITION ON ONE SIDE OF SAID POINTER, LIGHT SENSITIVE MEANS POSITIONED ON THE OTHER SIDE OF SAID POINTER AND BEING ADAPTED TO RECEIVE LIGHT PASSING THROUGH SAID OPENING, SAID METER BEING CALIBRATED AND SAID OPENING IN THE METER BEING POSITIONED SO THAT AT A PREDETERMINED FLOW OF REFERENCE CURRENT SAID POINTER OVERLIES SAID OPENING AND PREVENTS THE PASSAGE OF LIGHT THROUGH SAID OPENING, AND MEANS CONNECTED TO SAID LIGHT SENSITIVE MEANS FOR REGULATING SAID MEANS FOR IMPRESSING CURRENT FLOW BETWEEN THE ANODE AND THE STRUCTURE.