Electrode

• US 4,182,346 A
• Filed: 06/02/1977
• Issued: 01/08/1980
• Est. Priority Date: 06/02/1977
• Status: Expired due to Term

• Current Assignee: Biomedical International Company
• Original Assignee: Biomedical International Company
• Inventors: Allison, Kenneth C.
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US05/802,715
• Time in Patent Office: 950 Days
• Field of Search: 128/2.06 E, 128/2.1 E, 128/404, 128/410, 128/411, 128/416-418, 128/155, 128/156, 128/DIG. 4, 128/639-641, 128/783, 128/798, 128/802, 128/803
• US Class Current: 600/392
• CPC Class Codes: A61B 2562/0217 Electrolyte containing
• CPC Class Codes: A61B 5/25 Bioelectric electrodes therefor

Abstract

A biomedical electrode for use with a signal receiving apparatus is disclosed herein. The electrode includes an open-sided resilient container having a permeable diaphragm closing the open side. A terminal plug is positioned in connection with the resilient container. An electrolyte is contained in the container, and permeates the permeable diaphragm. A flat closed-cell perforated flexible annular mounting pad surrounds the container, and is secured to it. A flexible stainless steel ring engages the resilient container, and secures the flat closed-cell perforated flexible annular mounting pad in fixed engagement with a flange of the container. A uniform adhesive is secured to a side of the flat closed-cell perforated flexible annular mounting pad adjacent the permeable diaphragm for adhesively securing the electrode to the surface of a subject. The resilient container and flat closed-cell perforated flexible annular mounting pad are releasably mounted on a release paper and diaphragm sealer.

Claims

1. A biomedical electrode for use on a subject comprising:

a container having an open side;

an electrolyte in the container;

a terminal mounted in engagement with the container extending exteriorally therefrom and being in electrical connection with the electrolyte;

a substantially rigid lock ring secured to said container;

an electrode mount secured to said container by the lock ring adjacent to the open side of the container;

said container has a circular cross-section and the electrode mount is annular, said lock ring is an annular circular lock ring which engages said electrode mount, and an annular ring lock bead formed in said container, said ring lock bead engaging the lock ring and having an outer diameter slightly greater than the inner diameter of the lock ring to lock the lock ring into position.

2. A biomedical electrode for use on a subject as defined in claim 1, in which said annular circular lock ring is a substantially flat stainless steel annular circular lock ring, having a width substantially greater than a thickness.

3. A biomedical electrode for use on a subject comprising:

a container having an open side;

an electrolyte in the container;

a terminal mounted in engagement with the container extending exteriorally therefrom and being in electrical connection with the electrolyte;

a substantially rigid lock ring secured to said container;

an electrode mount secured to said container by the lock ring adjacent to the open side of the container;

said container has an outwardly extending annular flange;

said lock ring is positioned adjacent to said flange of the container;

said electrode mount being positioned between said lock ring and said flange, said electrode mount being secured in compression by said lock ring and said flange;

said flange includes a pad face in engagement with the electrode mount, a pad bead on said pad face of the flange separated from said lock ring by a distance less than a distance which the pad face of said flange is separated from the lock ring.

4. A biomedical electrode for use on a subject comprising:

a resilient polypropylene container having an open side, an annular ring lock bead formed integral with and exteriorally of said resilient polypropylene container opposite a flange formed integral with and exteriorally of said container parallel to said ring lock bead, said flange having a pad bead;

a thin microporous diaphragm sealingly secured to the resilient polypropylene container enclosing said open side;

an electrolyte in the container in contact with the thin microporous diaphragm permeating the thin microporous diaphragm to wet an outside surface of the subject;

said container having a terminal plug mounted in sealing engagement with the container and extending outwardly thereof and having a portion in contact with the electrolyte to form a half cell therewith;

a perforated annular closed-cell polyethylene foam electrode mount secured to said flange of said resilient container, said perforated annular closed-cell polyethylene foam electrode mount having a plurality of concentric circles of perforations, each of said perforations of said plurality of concentric circles of perforations defining circular cylinders having a diameter of 2.38 millimeters, each of said perforations extending through the electrode mount, said perforated annular closed-cell polyethylene foam electrode mount having a layer of adhesive having a uniform thickness covering a side of said perforated closed-cell polyethylene foam electrode mount adjacent to said thin microporous diaphragm, a circular stainless steel annular lock ring lockingly engaging said ring lock bead securing said perforated closed-cell polyethylene foam electrode mount to said resilient polypropylene container, said lock ring having an interior diameter slightly less than the outer diameter of the ring lock bead to be locked by the ring lock bead after being forced over the ring lock bead, said perforated annular closed-cell polyethylene foam electrode mount being compressed between said circular stainless steel annular lock ring and said pad bead on the flange;

release paper releasably adhesively connected to said uniform adhesive, said release paper having a diaphragm aperture formed therein, said diaphragm aperture receiving said thin microporous diaphragm; and

a diaphragm sealing strip, being composed of a thin sheet of aluminum foil, said diaphragm sealing strip sealingly enclosing said thin microporous diaphragm, said diaphragm sealing strip having a width less than a width of said release paper.