Electrode structures
OwnerGary L. Bukamierinventor
Life of this patent
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Abstract
An ion sensitive electrode structure employing concentrically arranged inner and outer tubular members employs a porous plug to seal the annular space between the tubular members and to enable formation of a salt bridge. The plug is made of porous Teflon and, in preferred form, it is combined with an encompassing sealing annulus which seals an annular space between the outer wall of the plug and the inner wall of the outer tubular member. In a form preferred for some applications, two such plugs and sealing annulus' are employed and are held separated by a spacer.
Claims9
An ion sensitive electrode comprising, in combination:
- an outer tubular member having a given inner diameter at a region near one end;
- an inner tubular member assembled concentrically within said one end of outer member and having an outer diameter less than said inner diameter such that an annular space remains between said members;
- bridging and sealing means for sealing said annular space in the region of one end of the assembled members while permitting ionic transfer across the seal;
- the bridging and sealing means comprising an annular plug embracing said inner member and formed of a porous material, said plug having an outer diameter less than the inner diameter of said outer member such that an annular sealing space remains between the plug and said outer member and
- said bridging and sealing means further comprising means in the form of a sealing annulus embracing said plug and bearing against the inner wall of said outer member for sealing said space against the passage of liquid.
An ion sensitive electrode comprising in combination:
- an outer member having a tubular portion of given inner diameter at one end;
- an inner member having a tubular portion whose outer diameter is less than said inner diameter disposed concentrically within the tubular portion of said outer member such that an annular space remains between said portions of said members;
- bridging and sealing means for sealing said annular space while permitting ionic transfer past the seal comprising an annular plug formed of porous polymer of tetrafluoroethylene and disposed in said annular space;
- the outer surface of said plug having a diameter less than the inner diameter of said outer member;
- and
- which further comprises a non-porous sealing annulus encompassing said outer surface of said plug and bearing against outer member.
Dependencies are inferred from the claim text.