Patent US3781659A successfully refreshed from Google Patents.
US3781659A
Expired / Lapsed
US
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Conductivity measuring system and conductivity cells therefor
Assignee: Individual
•
Filing: 1970-11-09
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Granted: 1973-12-25
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Expires: 1990-11-09
Abstract
Abstract An electrical measuring cell has two electrodes each formed by a conductive film deposited on the wall of the cell and having three portions which respectively lie inside the cell, outside the cell and around the rim of the cell. The second film portion enables the electrode to be connected to exterior circuitry and the third portion provides an electrical lead between the first and second film portions. The cells may be tubular or thimble shaped. Manufacture of the electrodes on the tubular cells is by dipping their ends into a metal compound solution and then treating the ends to plate the metal out of the solution. Apparatus employing this method utilises a turntable to carry the tubes and which is indexed between stations at which the different stages in electrode formation are carried out.
Inventors
- 👤 A Ur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:00
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/06; G01N27/07
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
194 words
In an electrical measuring system, a. at least two physically and electrically matched conductivity cells, b. each of said conductivity cells including: 1. a container made of a substantially trAnsparent, nonconductive material having, an inner wall, an outer wall, and at least one end wall defining a rim connecting said inner wall to said outer wall. 2. two spaced electrically conductive films deposited on surface areas of the walls of said container, 3. each of said spaced electrically conductive films having, an inner section continuous with a portion of the inner wall, a rim section continuous with a portion of the rim, and an outer section continuous with a portion of the outer wall electrically joined to each other, 4. said inner section on each pair of spaced electrically conductive films and said inner wall defining a conductivity chamber in the cell of predetermined dimensions therebetween. c. spaced interrelated circuits in said electrical measuring systems each respectively having means for connecting at least one of said conductivity cells therein, d. and means making at least one of said conductivity cells a reference against which the impedance changes in the other cells can be measured.
Claim 2
Dependent Claim
194 words
In an electrical measuring system, a. at least two physically and electrically matched conductivity cells, b. each of said conductivity cells including: 1. a container made of a substantially trAnsparent, nonconductive material having, an inner wall, an outer wall, and at least one end wall defining a rim connecting said inner wall to said outer wall. 2. two spaced electrically conductive films deposited on surface areas of the walls of said container, 3. each of said spaced electrically conductive films having, an inner section continuous with a portion of the inner wall, a rim section continuous with a portion of the rim, and an outer section continuous with a portion of the outer wall electrically joined to each other, 4. said inner section on each pair of spaced electrically conductive films and said inner wall defining a conductivity chamber in the cell of predetermined dimensions therebetween. c. spaced interrelated circuits in said electrical measuring systems each respectively having means for connecting at least one of said conductivity cells therein, d. and means making at least one of said conductivity cells a reference against which the impedance changes in the other cells can be measured.
Claim 3
Dependent Claim
15 words
two spaced electrically conductive films deposited on surface areas of the walls of said container,
Claim 4
Dependent Claim
15 words
two spaced electrically conductive films deposited on surface areas of the walls of said container,
Claim 5
Dependent Claim
10 words
a rim section continuous with a portion of the rim,
Claim 6
Dependent Claim
10 words
a rim section continuous with a portion of the rim,
Claim 7
Dependent Claim
10 words
a rim section continuous with a portion of the rim,
Claim 8
Dependent Claim
10 words
a rim section continuous with a portion of the rim,
Claim 9
Dependent Claim
57 words
In an electrical measuring system as claimed in claim 1 wherein the means making at least one of said conductivity cells a reference for measuring impedance changes in the other cell includes, a. a reactive substance operatively associated with the conductivity chamber of the reference cell, b. and means marking the reference cell for identifying the same.
Claim 10
Dependent Claim
28 words
In an electrical system as claimed in claim 1, wherein the reactive substance in the conductivity chamber of the reference cell is from the group, heparin and silicone.
Claim 11
Dependent Claim
91 words
and an outer section continuous with a portion of the outer wall. c. each of said spaced electrically conductive films having their respective inner sections substantially precisely spaced from each other so as to delineate with the inner wall of the capillary type tubular means a conductivity chamber in the measuring cell having predetermined dimensions, and d. the respective inner sections of the spaced electrically conductive films on the inner wall being closer to each other than the outer sections of the spaced electrically conductive films extending along the outer wall.
Claim 12
Dependent Claim
91 words
and an outer section continuous with a portion of the outer wall. c. each of said spaced electrically conductive films having their respective inner sections substantially precisely spaced from each other so as to delineate with the inner wall of the capillary type tubular means a conductivity chamber in the measuring cell having predetermined dimensions, and d. the respective inner sections of the spaced electrically conductive films on the inner wall being closer to each other than the outer sections of the spaced electrically conductive films extending along the outer wall.
Claim 13
Dependent Claim
117 words
and an outer section continuous with a portion of the outer wall. c. and each of the spaced electrically conductive films on each of said electrical measuring cells having their respective inner sections substantially precisely spaced from each other so as to delineate with the respective inner wall in each cell a conductivity chamber having predetermined parameters, d. the respective inner sections of the spaced electrically conductive films on the inner wall being closer to each other than the outer sections of the spaced electrically conductive films extending along the outer wall, e. and means making at least one of said conductivity cells a reference against which the impedance changes in the other cell can be measured.
Claim 14
Dependent Claim
117 words
and an outer section continuous with a portion of the outer wall. c. and each of the spaced electrically conductive films on each of said electrical measuring cells having their respective inner sections substantially precisely spaced from each other so as to delineate with the respective inner wall in each cell a conductivity chamber having predetermined parameters, d. the respective inner sections of the spaced electrically conductive films on the inner wall being closer to each other than the outer sections of the spaced electrically conductive films extending along the outer wall, e. and means making at least one of said conductivity cells a reference against which the impedance changes in the other cell can be measured.
Claim 15
Dependent Claim
46 words
each of said spaced electrically conductive films having, an inner section continuous with a portion of the inner wall, a rim section continuous with a portion of the rim, and an outer section continuous with a portion of the outer wall electrically joined to each other,
Claim 16
Dependent Claim
46 words
each of said spaced electrically conductive films having, an inner section continuous with a portion of the inner wall, a rim section continuous with a portion of the rim, and an outer section continuous with a portion of the outer wall electrically joined to each other,
Claim 17
Dependent Claim
38 words
In an electrical system as claimed in claim 1 in which each rim section and a portion of the outer section of the electrically conductive film on each of the cells is covered by a hard insulating material.
Claim 18
Dependent Claim
74 words
said inner section on each pair of spaced electrically conductive films and said inner wall defining a conductivity chamber in the cell of predetermined dimensions therebetween. c. spaced interrelated circuits in said electrical measuring systems each respectively having means for connecting at least one of said conductivity cells therein, d. and means making at least one of said conductivity cells a reference against which the impedance changes in the other cells can be measured.
Claim 19
Dependent Claim
74 words
said inner section on each pair of spaced electrically conductive films and said inner wall defining a conductivity chamber in the cell of predetermined dimensions therebetween. c. spaced interrelated circuits in said electrical measuring systems each respectively having means for connecting at least one of said conductivity cells therein, d. and means making at least one of said conductivity cells a reference against which the impedance changes in the other cells can be measured.
Claim 20
Dependent Claim
56 words
In an electrical system as claimed in claim 4 wherein the means making at least one of said conductivity cells a reference for measuring impedance changes in the other cells includes, a. a layer of inhibiting material on the inner wall of the reference cell, b. and means marking the reference cell to identify the same.
Claim 21
Dependent Claim
30 words
In an electrical system as claimed in claim 5 wherein the layer of inhibiting material on the inner wall of the reference cell is from the group, heparin and silicone.
Claim 22
Dependent Claim
24 words
The combination for use in an electrical measuring system as claimed in claim 1 of a cassette holder for at least two conductivity cells.
Claim 23
Dependent Claim
75 words
An electrical measuring cell for use in an electrical measuring system comprising, a. capillary type tubular means made of a substantially transparent insulating material having an inner wall and an outer wall and end portions defining rims at opposite ends of the tubular member connected to the inner wall and the outer wall, b. two spaced electrically conductive films deposited on surface areas of the tubular means having sections electrically joined to each other including,
Claim 24
Dependent Claim
75 words
An electrical measuring cell for use in an electrical measuring system comprising, a. capillary type tubular means made of a substantially transparent insulating material having an inner wall and an outer wall and end portions defining rims at opposite ends of the tubular member connected to the inner wall and the outer wall, b. two spaced electrically conductive films deposited on surface areas of the tubular means having sections electrically joined to each other including,
Claim 25
Dependent Claim
35 words
In an electrical measuring cell as claimed in claim 8, including, a layer of hard insulating material covering the rim section and at least a portion of the outer section of the electrically conductive film.
Claim 26
Dependent Claim
39 words
In an electrical measuring cell as claimed in claim 8 including, a. a reactive substance operatively associated with the conductivity chamber formed in the capillary type tubular means, and b. means marking the outer wall of the tubular means.
Claim 27
Dependent Claim
21 words
In an electrical measuring cell as claimed in claim 10 wherein the reactive substance is from the group heparin and silicone.
Claim 28
Dependent Claim
96 words
In combination, at least two electrical measuring cells for use in a system for determining the relative impedance changes in at least one of the measuring cells, each of said conductivity cells including: a. capillary type tubular means made of a substantially transparent insulating material having an inner wall and an outer wall and end portions defining rims at opposite ends of the tubular member connected to the inner wall and the outer wall, b. two spaced electrically conductive films deposited on surface areas of the tubular means having sections electrically joined to each other including,
Claim 29
Dependent Claim
96 words
In combination, at least two electrical measuring cells for use in a system for determining the relative impedance changes in at least one of the measuring cells, each of said conductivity cells including: a. capillary type tubular means made of a substantially transparent insulating material having an inner wall and an outer wall and end portions defining rims at opposite ends of the tubular member connected to the inner wall and the outer wall, b. two spaced electrically conductive films deposited on surface areas of the tubular means having sections electrically joined to each other including,
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |