Patent US3837808A successfully refreshed from Google Patents.
Patent US3194068A successfully refreshed from Google Patents.
US3194068A
Expired / Lapsed
US
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Magnetic flowmeter
Assignee: Fischer and Porter Co
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Filing: 1961-02-28
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Granted: 1965-07-13
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Expires: 1981-02-28
Abstract
No abstract record available.
Inventors
- 👤 Elmer D Mannherz
- 👤 John J Mcdermott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:29
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/56; G01F1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A FLOWMETER COMPRISING AN ELECTRICALLY CONDUCTIVE CONDUIT FOR FLOWING LIQUID HAVING AN UNINSULATED INNER SURFACE, ELECTROMAGNETIC MEANS PROVIDING A MAGNETIC FIELD TRANSVERSE TO SAID CONDUIT, MEANS SUPPLYING CURRENT TO SAID ELECTROMAGNETIC MEANS, ELECTRODES INSULATED FROM SAID CONDUIT, EXPOSED TO LIQUID FLOWING THROUGH SAID CONDUIT, AND LOCATED ON A LINE EXTENDING TRANSVERSELY THROUGH SAID FIELD TO PICK UP SIGNALS GENERATED BY FLOW OF LIQUID THROUGH SAID FIELD, MEANS CONNECTED TO SAID ELECTRODES FOR MEASURING SAID SIGNALS, AND A MEMBER INDIVIDUAL TO AT LEAST ONE OF SAID ELECTRODES PROVIDING ELECTRICAL INSULATION THROUGH A REGION OF SUCH SUBSTANTIAL EXTENT SURROUNDING THE LAST MENTIONED ELECTRODE AND ADJACENT TO THE INNER SURFACE OF SAID CONDUIT AS TO MAKE NEGLIGIBLE LEAKAGE BETWEEN SAID ELECTRODE AND THE INNER SURFACE OF THE CONDUIT, SAID MEMBER BEING UNCONNECTED TO SAID CONDUIT EXCEPT IN THE IMMEDIATE VICINITY OF ITS ELECTRODE.
Claim 2
Dependent Claim
140 words
A FLOWMETER COMPRISING AN ELECTRICALLY CONDUCTIVE CONDUIT FOR FLOWING LIQUID HAVING AN UNINSULATED INNER SURFACE, ELECTROMAGNETIC MEANS PROVIDING A MAGNETIC FIELD TRANSVERSE TO SAID CONDUIT, MEANS SUPPLYING CURRENT TO SAID ELECTROMAGNETIC MEANS, ELECTRODES INSULATED FROM SAID CONDUIT, EXPOSED TO LIQUID FLOWING THROUGH SAID CONDUIT, AND LOCATED ON A LINE EXTENDING TRANSVERSELY THROUGH SAID FIELD TO PICK UP SIGNALS GENERATED BY FLOW OF LIQUID THROUGH SAID FIELD, MEANS CONNECTED TO SAID ELECTRODES FOR MEASURING SAID SIGNALS, AND A MEMBER INDIVIDUAL TO AT LEAST ONE OF SAID ELECTRODES PROVIDING ELECTRICAL INSULATION THROUGH A REGION OF SUCH SUBSTANTIAL EXTENT SURROUNDING THE LAST MENTIONED ELECTRODE AND ADJACENT TO THE INNER SURFACE OF SAID CONDUIT AS TO MAKE NEGLIGIBLE LEAKAGE BETWEEN SAID ELECTRODE AND THE INNER SURFACE OF THE CONDUIT, SAID MEMBER BEING UNCONNECTED TO SAID CONDUIT EXCEPT IN THE IMMEDIATE VICINITY OF ITS ELECTRODE.
References Cited (Backward Citations)
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US2844568A
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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) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |