US4146457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm cells
Assignee: Imperial Chemical Industries Ltd
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Filing: 1977-11-04
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Granted: 1979-03-27
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Expires: 1997-11-04
Abstract
Abstract A device for supporting a sheet diaphragm on to a surface of a cathode which is made of a flexible insulating material and which can be caused or allowed to expand into the space between the anode and the diaphragm so that the diaphragm is pressed into contact with the cathode.
Inventors
- 👤 Aitken M. Couper
- 👤 Peter J. Davies
- 👤 Janusz J. H. Krause
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:37
CPC Classifications
C; C25; C25B; C25B13/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
109 words
An electrolytic cell comprising an anode spaced apart from a cathode and a sheet diaphragm separating the anode and cathode and which further comprises a device for supporting the diaphragm on the surface of the cathode, characterized in that the device is made of a flexible insulating material which has dimensions which permit it to be placed in the cell in the space between the anode and the diaphragm and which is capable of being caused or allowed to expand into the said space so as to bear upon the surfaces of the anode and the diaphragm, thereby pressing the diaphragm into contact with the surface of the cathode.
Claim 2
Dependent Claim
109 words
An electrolytic cell comprising an anode spaced apart from a cathode and a sheet diaphragm separating the anode and cathode and which further comprises a device for supporting the diaphragm on the surface of the cathode, characterized in that the device is made of a flexible insulating material which has dimensions which permit it to be placed in the cell in the space between the anode and the diaphragm and which is capable of being caused or allowed to expand into the said space so as to bear upon the surfaces of the anode and the diaphragm, thereby pressing the diaphragm into contact with the surface of the cathode.
Claim 3
Dependent Claim
18 words
An electrolytic cell as in claim 1 wherein the said supporting device is mounted on a central support.
Claim 4
Dependent Claim
17 words
An electrolytic cell as in claim 2 wherein said central support is a rod or a wire.
Claim 5
Dependent Claim
15 words
An electrolytic cell as in claim 1 wherein said supporting device comprises a coiled strip.
Claim 6
Dependent Claim
73 words
An electrolytic cell as in claim 2 wherein said supporting device comprises a foldable strip mounted upon a central support, which strip when inserted in the space between the diaphragm and the anode of the cell is substantially parallel to the diaphragm and the anode, and wherein the strip is compressible relative to the support so that on compressing it expands laterally and bears on the surface of the anode and the diaphragm.
Claim 7
Dependent Claim
17 words
An electrolytic cell as in claim 1 wherein said flexible insulating material is a fluorinated organic polymer.
Claim 8
Dependent Claim
16 words
An electrolytic cell as in claim 6 wherein the fluorinated polymer is polytetrafluoroethylene or polyvinylidene fluoride.
Claim 9
Dependent Claim
21 words
An electrolytic cell as in claim 3 wherein said central support is made of a film-forming metal or an alloy thereof.
Claim 10
Dependent Claim
15 words
An electrolytic cell as in claim 8 wherein said central support is made of titanium.
Claim 11
Independent Claim
103 words
A device for supporting a sheet diaphragm on to the surface of a cathode in an electrolytic diaphragm cell which cell also comprises an anode spaced apart from the cathode, characterized in that the device is made of a flexible insulating material which has dimensions which permit it to be placed in the cell in the space between the anode and the diaphragm and which is capable of being caused or allowed to expand into the said space so as to bear upon the surfaces of the anode and the diaphragm, thereby pressing the diaphragm into contact with the surface of the cathode.
Claim 12
Independent Claim
103 words
A device for supporting a sheet diaphragm on to the surface of a cathode in an electrolytic diaphragm cell which cell also comprises an anode spaced apart from the cathode, characterized in that the device is made of a flexible insulating material which has dimensions which permit it to be placed in the cell in the space between the anode and the diaphragm and which is capable of being caused or allowed to expand into the said space so as to bear upon the surfaces of the anode and the diaphragm, thereby pressing the diaphragm into contact with the surface of the cathode.
Claim 13
Dependent Claim
13 words
A device as claimed in claim 10 whenever mounted on a central support.
Claim 14
Dependent Claim
17 words
A device as claimed in claim 11 wherein the central support is a rod or a wire.
Claim 15
Dependent Claim
21 words
A device as claimed in claim 12 wherein the central support is made of a film-forming metal or an alloy thereof.
Claim 16
Dependent Claim
15 words
A device as claimed in claim 13 wherein the central support is made of titanium.
Claim 17
Dependent Claim
70 words
A device as claimed in claim 11 which comprises a foldable strip mounted upon a central support, which strip when inserted in the space between the diaphragm and the anode of the cell is substantially parallel to the diaphragm and the anode, and wherein the strip is compressible relative to the support so that on compressing it expands laterally and bears on the surface of the anode and the diaphragm.
Claim 18
Dependent Claim
12 words
A device as claimed in claim 10 which comprises a coiled strip.
Claim 19
Dependent Claim
17 words
A device as claimed in claim 10 wherein the flexible insulating material is a fluorinated organic polymer.
Claim 20
Dependent Claim
16 words
A device as claimed in claim 17 wherein the fluorinated polymer is polytetrafluoroethylene or polyvinylidene fluoride.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |