Patent US3767552A successfully refreshed from Google Patents.
US3767552A
Expired / Lapsed
US
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Gas analyzer
Assignee: TDY Industries LLC
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Filing: 1971-10-06
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Granted: 1973-10-23
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Expires: 1991-10-06
Abstract
Abstract An electrochemical gas analyzer is disclosed. The analyzer comprises an insulator body having a central passage divided into an electrochemical cell chamber and a gas expansion chamber by a first flexible, liquid impermeable expansion membrane. An anode in the form of a high surface area, liquid-pervious body of a nonpolarizable metal is received in the cell chamber. The upper surface of the cell chamber is enclosed by a thin, perforated, convex cathode of a polarizable metal that is non-flexible under the conditions of operation of the analyzer. The cathode is covered with a gas-permeable, electrolyte-impermeable membrane which conforms to the surface of the cathode and exhibits less tendency to flex than the first flexible membrane. Sufficient liquid electrolyte is present between the membranes to fill the entire cell chamber.
Inventors
- 👤 J Lauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:01
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
35 words
A cell according to claim 1 further including an insulator base plate having a gas vent hole enclosing said expansion chamber and electrode contact terminal means supported on the outside surface of the base plate.
Claim 2
Dependent Claim
45 words
A cell according to claim 2 in which said contact means includes a conductor connected to each of said electrodes, said conductor sealingly penetrating the wall of said cell chamber, the wall of said expansion chamber and the base plate into contact with said terminal.
Claim 3
Dependent Claim
46 words
A cell according to claim 1 further including a bore extending into the side wall of the container and extending into said cell chamber, a conductive metal plug inert to the electrolyte sealingly received in the bore, said plug forming a portion of said contact means.
Claim 4
Dependent Claim
23 words
A cell according to claim 1 further including an annular flange extending into said passageway above said expansion membrane for supporting the anode.
Claim 5
Dependent Claim
20 words
A cell according to claim 5 further including an annular metal contact plate disposed between said flange and said anode.
Claim 6
Dependent Claim
28 words
A cell according to claim 5 further including an electrolyte permeable disc and means for supporting the disc over the top surface of the body of the anode.
Claim 7
Dependent Claim
24 words
A cell according to claim 5 in which the anode is formed of a sintered body of particulate non-polarizable metal non-reactive with the electrolyte.
Claim 8
Dependent Claim
20 words
A cell according to claim 8 in which the membranes are formed of synthetic organic resins non-reactive with the electrolyte.
Claim 9
Dependent Claim
37 words
A cell according to claim 9 in which the expansion membrane is formed of a 1 to 4 mil thick polyethylene film and the second membrane is formed of a 0.125 to 2.0 mil thick polytetrafluoroethylene film.
Claim 10
Dependent Claim
25 words
A cell according to claim 1 in which the cathode is formed of a multi-apertured sheet having a convex curvature for tensioning said second membrane.
Claim 11
Dependent Claim
34 words
A cell according to claim 11 in which the cathode is formed of a weldable core having a thin coating of a polarizable metal selected from the group consisting of gold, silver and platinum.
Claim 12
Dependent Claim
20 words
A cell according to claim 11 in which the cathode has a thickness sufficient to prevent the cathode from distorting.
Claim 13
Dependent Claim
208 words
An electrochemical cell for the monitoring of a gas comprising: insulator walls defining a container having a central passageway; a liquid-impermeable expansion membrane supported on said walls across said entire passageway dividing said passageway into a cell chamber and an expansion chamber; an anode comprising a porous, high surface area cylindrical body of a non-polarizable metal, having a central bore extending therethrough, said anode being disposed in said cell chamber; a cathode comprising a multi-apertured sheet of a polzarizing metal; means supporting said sheet across said passageway to enclose said cell chamber; a second membrane fOrmed of a liquid impermeable, gas permeable material sealingly attached to said side walls and in intimate tension contact with the outer surface of the cathode, said second membrane being less flexible than said expansion membrane; a body of electrolyte chamber between said expansion membrane and in said central bore immersing said anode, and in a quantity sufficient to wet all surfaces of said cathode; an electrolyte permeable disc; means for supporting said disc over the top surface of the body of said anode; an insulator base plate enclosing said expansion chamber, said insulator base plate having gas vent holes therethrough; and contact means affording external electrical connection to said anode and cathode.
References Cited (Backward Citations)
US3239444A
Cited
US3322662A
Cited
US3260656A
Cited
US3235477A
Cited
US3227643A
Cited
US3429796A
Cited
US3503861A
Cited
US3577332A
Cited
US3616410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |