Reference electrode
First Claim
Patent Images
1. A reference electrode for use in testing or measuring serum or blood samples, said reference electrode comprising:
- a cylindrical holder member including a cylindrical upper holder having upper and lower ends and a cylindrical lower holder having upper and lower ends, said lower end of said upper holder and said upper end of said lower holder being joined by meshing screw threads;
said lower holder having an interior forming a chamber for containing a reference liquid;
an inner electrode positioned within said chamber, said inner electrode being connected to an electric lead extending through said upper end of said upper holder;
means for spporting said inner electrode within said chamber and for sealing said chamber adjacent said upper end of said lower holder;
a liquid junction comprising a hydrophilic polypropylene membrane coated with a surface active agent, said membrane including a flat portion abutted against and closing said lower end of said lower holder and a tubular flange portion integral with and extending from said flat portion, said tubular flange portion fitting about an exterior surface adjacent said lower end of said lower holder; and
a removable push ring surrounding said tubular flange portion and pressing said tubular flange portion tightly against said exterior surface.
0 Assignments
0 Petitions
Accused Products
Abstract
A reference electrode includes a holder member having therein a chamber. An inner electrode is positioned within the chamber, the inner electrode being connected to an electric lead extending through an upper end of the holder member. The holder member has a lower end which is closed by a liquid junction in the form of a hydrophilic polypropylene membrane coated with a surface active agent. The membrane has an integral flange which fits around the lower end of the holder member, and the membrane is readily selectively removable from the lower end of the holder member.
-
Citations
3 Claims
-
1. A reference electrode for use in testing or measuring serum or blood samples, said reference electrode comprising:
-
a cylindrical holder member including a cylindrical upper holder having upper and lower ends and a cylindrical lower holder having upper and lower ends, said lower end of said upper holder and said upper end of said lower holder being joined by meshing screw threads; said lower holder having an interior forming a chamber for containing a reference liquid; an inner electrode positioned within said chamber, said inner electrode being connected to an electric lead extending through said upper end of said upper holder; means for spporting said inner electrode within said chamber and for sealing said chamber adjacent said upper end of said lower holder; a liquid junction comprising a hydrophilic polypropylene membrane coated with a surface active agent, said membrane including a flat portion abutted against and closing said lower end of said lower holder and a tubular flange portion integral with and extending from said flat portion, said tubular flange portion fitting about an exterior surface adjacent said lower end of said lower holder; and a removable push ring surrounding said tubular flange portion and pressing said tubular flange portion tightly against said exterior surface. - View Dependent Claims (2, 3)
-
Specification