US3178941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction flowmeter
Assignee: Consolidated Electrodynamics Corp
•
Filing: 1961-08-07
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Granted: 1965-04-20
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Expires: 1981-08-07
Abstract
No abstract record available.
Inventors
- 👤 Clifford E Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:54
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/56; G01F1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
AN INDUCTION TYPE FLOWMETER FOR MEASURING VOLUMETRIC FLOW RATE COMPRISING: FIRST AND SECOND PARRALLEL CONDUCTING PLATES DEFINING A FIRST CAPACITOR; MEANS FOR DIRECTING A FLUID BETWEEN THE PLATES; MEANS FOR GENERATING AN ALTERNATING MAGNETIC FIELD PARALLEL TO THE FIRST AND SECOND PLATES AND NORMAL TO THE DIRECTION OF FLUID FLOW; HIGH GAIN ALTERNATING CURRENT AMPLIFYING MEANS COUPLED TO THE FIRST CONDUCTING PLATE; SAID AMPLIFYING MEANS HAVING A BALANCED OUTPUT; NEGATIVE FEEDBACK MEANS COUPLED BETWEEN THE OUTPUT OF THE AMPLIFYING MEANS AND THE SECOND CONDUCTING PLATE; AND POSITIVE FEEDBACK MEANS INCLUDING A SECOND CAPACITOR COUPLED BETWEEN THE OUTPUT OF THE AMPLIFYING MEANS AND THE FIRST CONDUCTING PLATE, THE SECOND CAPACITOR HAVING A CAPACITANCE EQUAL TO THE
Claim 2
Dependent Claim
115 words
AN INDUCTION TYPE FLOWMETER FOR MEASURING VOLUMETRIC FLOW RATE COMPRISING: FIRST AND SECOND PARRALLEL CONDUCTING PLATES DEFINING A FIRST CAPACITOR; MEANS FOR DIRECTING A FLUID BETWEEN THE PLATES; MEANS FOR GENERATING AN ALTERNATING MAGNETIC FIELD PARALLEL TO THE FIRST AND SECOND PLATES AND NORMAL TO THE DIRECTION OF FLUID FLOW; HIGH GAIN ALTERNATING CURRENT AMPLIFYING MEANS COUPLED TO THE FIRST CONDUCTING PLATE; SAID AMPLIFYING MEANS HAVING A BALANCED OUTPUT; NEGATIVE FEEDBACK MEANS COUPLED BETWEEN THE OUTPUT OF THE AMPLIFYING MEANS AND THE SECOND CONDUCTING PLATE; AND POSITIVE FEEDBACK MEANS INCLUDING A SECOND CAPACITOR COUPLED BETWEEN THE OUTPUT OF THE AMPLIFYING MEANS AND THE FIRST CONDUCTING PLATE, THE SECOND CAPACITOR HAVING A CAPACITANCE EQUAL TO THE
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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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |