Patent US3751969A successfully refreshed from Google Patents.
US3751969A
Expired / Lapsed
US
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Detection system
Assignee: Westinghouse Electric Corp
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Filing: 1970-08-17
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Granted: 1973-08-14
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Expires: 1990-08-17
Abstract
Abstract A detector is disclosed for detecting the presence of substances that form ions in liquids, comprising a porous, non-conducting wicking material which is electrically connected to a power supply and a current or resistance detecting device.
Inventors
- 👤 S Schrock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:02
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0027
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
An on-line detection system for continuously monitoring a fluid stream within an enclosed fluid duct to detect the presence within the fluid stream of a substance that forms ions in liquids comprising: a porous, electrically non-conducting wicking material at least partially disposed within the interior of the fluid duct and continuously exposed to the fluid stream therein, said wicking material being wetted with a relatively non-conducting medium that characteristically forms a relatively conducting medium by cumulatively collecting ions associated with the substance being detected when in fluid communication therewith so as to be responsive to even minute quantities thereof; a plurality of electrical contacts provided on at least two spaced points along said non-conducting wick; and means associated with said contacts for detecting a change in electrical resistance within said wick along a path defined by the two spaced point locations of said contacts.
Claim 2
Dependent Claim
144 words
An on-line detection system for continuously monitoring a fluid stream within an enclosed fluid duct to detect the presence within the fluid stream of a substance that forms ions in liquids comprising: a porous, electrically non-conducting wicking material at least partially disposed within the interior of the fluid duct and continuously exposed to the fluid stream therein, said wicking material being wetted with a relatively non-conducting medium that characteristically forms a relatively conducting medium by cumulatively collecting ions associated with the substance being detected when in fluid communication therewith so as to be responsive to even minute quantities thereof; a plurality of electrical contacts provided on at least two spaced points along said non-conducting wick; and means associated with said contacts for detecting a change in electrical resistance within said wick along a path defined by the two spaced point locations of said contacts.
Claim 3
Dependent Claim
39 words
The detection system of claim 1 wherein said wicking material extends through the duct to the exterior thereof, the portion of said wick exterior of the duct being at least partially immersed in a reservoir of said non-conducting medium.
Claim 4
Dependent Claim
21 words
The detection system of claim 1 wherein said wicking material is selected from the group consisting of alumina (Al2O3) and asbestos.
Claim 5
Dependent Claim
12 words
The detection system of claim 1 wherein said non-conducting medium comprises water.
Claim 6
Dependent Claim
47 words
The detection system of claim 1 wherein said resistance detecting means comprises a power supply and a device responsive to changes in resistance within said wicking material to provide an output representative thereof, said power supply and said device being serially connected to said respective electrical contacts.
Claim 7
Dependent Claim
22 words
The detection system of claim 2 wherein said reservoir is provided with inlet means to maintain the level of said non-conducting medium.
Claim 8
Dependent Claim
35 words
The detection system of claim 2 wherein the fluid duct is hermetically sealed and the wick penetration is impermeable to the fluid stream so as to completely confine the fluid stream within the fluid duct.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |