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Patent US3746896A successfully refreshed from Google Patents.
US3746896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic flow transducers having laminar electrodes
Assignee: ABB Automation Inc
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Filing: 1972-06-12
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Granted: 1973-07-17
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Expires: 1992-06-12
Abstract
Abstract A flow transducer in the form of a section of conduit having laminar electrodes bonded to the inside surface of the section, over holes through the wall of the section. Wire leads, fastened to the electrodes, extend out of the holes for connection to measuring circuitry external to the section. The holes are otherwise filled with a sealant, such as glass.
Inventors
- 👤 H Gruner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:47
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/56; G01F1/58; G01F1/584; G01P; G01P5/00; G01P5/08; G01P5/086
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
141 words
In an electromagnetic flow transducer comprising a section of conduit having field means or producing a magnetic field through said section and transverse to said section, said section also having electrodes exposed at the inner surface of said section and positioned on the wall thereof for picking up voltages in conductive liquid flowing through said section, the improvement wherein said electrodes are in the form of laminae, each having one surface integrally sealed into said inner surface, said section having holes through said wall at each electrode opening at said one surface and being totally covered by said electrode; each said hole having a wire therein and extending therefrom to the exterior of said section, and fixed to said one surface of the corresponding said electrode; each said hole being otherwise filled with sealant fixing the corresponding said wire in place.
Claim 2
Dependent Claim
141 words
In an electromagnetic flow transducer comprising a section of conduit having field means or producing a magnetic field through said section and transverse to said section, said section also having electrodes exposed at the inner surface of said section and positioned on the wall thereof for picking up voltages in conductive liquid flowing through said section, the improvement wherein said electrodes are in the form of laminae, each having one surface integrally sealed into said inner surface, said section having holes through said wall at each electrode opening at said one surface and being totally covered by said electrode; each said hole having a wire therein and extending therefrom to the exterior of said section, and fixed to said one surface of the corresponding said electrode; each said hole being otherwise filled with sealant fixing the corresponding said wire in place.
Claim 3
Dependent Claim
13 words
The invention of claim 1 wherein said section is made of non-conductive material.
Claim 4
Dependent Claim
65 words
The invention of claim 1, wherein said section is made of non-conductive ceramic material providing said inner surface, each said lamina is made of metal providing said one surface, and said sealant is made of glass; said one surface being fused into said inner surface and into said sealant, and said sealant being fused into the surfaces of said non-conductive ceramic material surrounding said holes.
Claim 5
Dependent Claim
53 words
The invention of claim 1, wherein said section is made essentially of conductive material, except that the portion thereof next adjacent to the electrodes is made of non-conductive material for insulating said electrodes from said conductive material, and said sealant being non-conductive for isolating said wires from said conductive material of said section.
Claim 6
Dependent Claim
10 words
The invention of claim 4, wherein said sealant is glass.
Claim 7
Dependent Claim
10 words
The invention of claim 4. wherein said electrodes are platinum.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |