US3078712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic flowmeter
Assignee: Fischer and Porter Co
•
Filing: 1959-04-14
•
Granted: 1963-02-26
•
Expires: 1979-04-14
Abstract
No abstract record available.
Inventors
- 👤 Koblenz Avrom Morris
- 👤 Thomas Randal Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:28
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/56; G01F1/58; G01F1/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A FLOWMETER COMPRISING A CONDUIT FOR FLOWING FLUID, ELECTROMAGNETIC MEANS PROVIDING A MAGNETIC FIELD TRANSVERSE TO SAID CONDUIT, MEANS SUPPLYING ALTERNATING CURRENT TO SAID ELECTROMAGNETIC MEANS, ELECTRODES EXPOSED TO FLUID FLOWING THROUGH SAID CONDUIT AND LOCATED ON A LINE EXTENDING TRANSVERSELY THROUGH SAID FIELD TO PICK UP SIGNALS GENERATED BY FLOW OF FLUID THROUGH SAID FIELD, AN AMPLIFIER HAVING ITS INPUT RECEIVING SIGNALS FROM SAID ELECTRODES, MEANS INCLUDING SHIELDED LEADS CONNECTING SAID ELECTRODES TO THE INPUT OF SAID AMPLIFIER, A NETWORK RECEIVING AN INPUT FROM SAID ALTERNATING CURRENT SUPPLYING MEANS AND PROVIDING AN OUTPUT TO SAID AMPLIFIER BUCKING THE SIGNALS FROM SAID ELECTRODES, MEANS CONTROLLED BY SAID AMPLIFIER TO EFFECT ADJUSTMENT OF SAID NETWORK TO NULL THE SIGNALS DELIVERED FROM THE AMPLIFIER, THE LAST MENTIONED MEANS COMPRISING A PAIR OF DEVICES, ONE RESPONSIVE PRIMARILY
Claim 2
Dependent Claim
134 words
A FLOWMETER COMPRISING A CONDUIT FOR FLOWING FLUID, ELECTROMAGNETIC MEANS PROVIDING A MAGNETIC FIELD TRANSVERSE TO SAID CONDUIT, MEANS SUPPLYING ALTERNATING CURRENT TO SAID ELECTROMAGNETIC MEANS, ELECTRODES EXPOSED TO FLUID FLOWING THROUGH SAID CONDUIT AND LOCATED ON A LINE EXTENDING TRANSVERSELY THROUGH SAID FIELD TO PICK UP SIGNALS GENERATED BY FLOW OF FLUID THROUGH SAID FIELD, AN AMPLIFIER HAVING ITS INPUT RECEIVING SIGNALS FROM SAID ELECTRODES, MEANS INCLUDING SHIELDED LEADS CONNECTING SAID ELECTRODES TO THE INPUT OF SAID AMPLIFIER, A NETWORK RECEIVING AN INPUT FROM SAID ALTERNATING CURRENT SUPPLYING MEANS AND PROVIDING AN OUTPUT TO SAID AMPLIFIER BUCKING THE SIGNALS FROM SAID ELECTRODES, MEANS CONTROLLED BY SAID AMPLIFIER TO EFFECT ADJUSTMENT OF SAID NETWORK TO NULL THE SIGNALS DELIVERED FROM THE AMPLIFIER, THE LAST MENTIONED MEANS COMPRISING A PAIR OF DEVICES, ONE RESPONSIVE PRIMARILY
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) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |