Electrode

• US 3,098,813 A
• Filed: 02/06/1959
• Issued: 07/23/1963
• Est. Priority Date: 02/06/1959
• Status: Expired due to Term

• Current Assignee: Cedric H. Beebe, Earl W. Mckinley, Max D. Liston
• Original Assignee: Cedric H. Beebe, Earl W. Mckinley, Max D. Liston
• Inventors: Beebe, Cedric H., Liston, Max D., Mckinley, Earl W.
• Application Number:
  US03/791,752
• Time in Patent Office: 1,628 Days
• US Class Current: 204/415
• CPC Class Codes: G01N 27/404 Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid , e.g. Clark-type oxygen sensors

Claims

1. IN A POLAROGRAPHIC ELECTRODE ASSEMBLE ADAPTED TO BE INSERTED THROUGH A HYPODERMIC NEEDLE FOR DETERMINING THE PROPORTION QUANTITY OF A CONSTITUENT OF A COMPOSITTION, THE COMBINATION OF:

AN ELONGATED SUPPORT BODY OF NONCONDUCTING MATERIAL;

A SENSING ELECTROE ELEMENT IN THE FORM OF A CONDUCTOR ENCLOSED WITHIN SAID BODY WITH AN END OF SAID CONDUCTOR PROJECTING THROUGH AN END OF SAID BODY TO THE OUTER SURFACE THEREOF;

A REFERENCE ELECTRODE ELEMENT IN THE FORM OF AN ANNULAR RING OF CONDUCTING MATERIAL DISPOSED AROUND SAID BODY AND SPACED FROM SAID END DEFINING AN ANNULAR SPACE BETWWEEN THE PERIPHERY OF SAID BODY AND RING FOR RETAINING AN ELECTROLYTE;

A MEMBRANE HAVING A THICKNESS GREATER THAN THE MAXIMUM WIDTH OF THE END OF SAID CONDUCTOR PROJECTING THROUGH SAID END OF SAID BODY, SELECTIVELY PERMEABLE TO SAID CONSTITUENT AND FORMED OVER SAID END AND SAID RING ENCLOSING SAID ANNULAR SPACE;

MENS FOR ELECTRICALLY CONNECTING EACH OF SAID ELECTORDE ELEMENTS TO AN EXTERNAL MEASURING CIRCUIT;

AND MEANS FOR CLAMPING SAID MEMBRANE IN POSITION.