US3146346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric circuit for the analysis of pipeline networks for transporting fluids
Assignee: NAZ METANODOTTI SpA SOC
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Filing: 1962-02-19
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Granted: 1964-08-25
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Expires: 1982-02-19
Abstract
No abstract record available.
Inventors
- 👤 Evangelisti Giuseppe
- 👤 Marro Giovanni
- 👤 Belardinelli Enzo
- 👤 Sarti Eugenio
- 👤 Grandi Alberto
- 👤 Bonfiglioli Gianpaolo
- 👤 Riglietti Rino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:04
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/57
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
AN ELECTRIC CIRCUIT FOR SIMULATING FLUID-CONDUCTING CONDUITS, SAID CIRCUIT HAVING TWO TERMINALS AND COMPRISING (A) AN OPERATIONAL ADDING AMPLIFIER (B) AN INVERTER AMPLIFIER (C) A LINEAR RESISTANCE ADJUSTABLE TO REPRESENT DIFFERENT CONDUITS, SAID RESISTANCE BEING CONNECTED IN SERIES WITH A SOURCE OF VARIABLE ELECTROMOTIVE FORCE CONSISTING OF (D) A CATHODE FOLLOWER CIRCUIT FED BY A FEEDER INSULATED FROM GROUND, SAID CATHODE FOLLOWER CIRCUIT BEING PILOTED BY (E) A COMPUTER CIRCUIT COMPRISING A FUNCTION GENERATOR WHOSE OUTPUT IS CONNECTED TO ONE OF THE INPUTS OF SAID OPERATIONAL ADDING AMPLIFIER, THE OTHER INPUT OF SAID ADDING AMPLIFIER BEING CONNECTED TO SAID INVERTER AMPLIFIER, THEREBY TO CAUSE THE CURRENT CIRCULATING BETWEEN THE TWO TERMINALS OF THE ELECTRIC CIRCUIT TO DEPEND UPON THE VOLTAGES APPLIED AT SAID TWO TERMINALS IN ANALOGY TO THE DEPENDENCY EXISTING BETWEEN THE PRESSURE AT THE ENDS OF A CONDUIT BEING SIMULATED AND THE RATE OF FLOW OF FLUID PASSING THROUGH SAID CONDUIT.
Claim 2
Dependent Claim
153 words
AN ELECTRIC CIRCUIT FOR SIMULATING FLUID-CONDUCTING CONDUITS, SAID CIRCUIT HAVING TWO TERMINALS AND COMPRISING (A) AN OPERATIONAL ADDING AMPLIFIER (B) AN INVERTER AMPLIFIER (C) A LINEAR RESISTANCE ADJUSTABLE TO REPRESENT DIFFERENT CONDUITS, SAID RESISTANCE BEING CONNECTED IN SERIES WITH A SOURCE OF VARIABLE ELECTROMOTIVE FORCE CONSISTING OF (D) A CATHODE FOLLOWER CIRCUIT FED BY A FEEDER INSULATED FROM GROUND, SAID CATHODE FOLLOWER CIRCUIT BEING PILOTED BY (E) A COMPUTER CIRCUIT COMPRISING A FUNCTION GENERATOR WHOSE OUTPUT IS CONNECTED TO ONE OF THE INPUTS OF SAID OPERATIONAL ADDING AMPLIFIER, THE OTHER INPUT OF SAID ADDING AMPLIFIER BEING CONNECTED TO SAID INVERTER AMPLIFIER, THEREBY TO CAUSE THE CURRENT CIRCULATING BETWEEN THE TWO TERMINALS OF THE ELECTRIC CIRCUIT TO DEPEND UPON THE VOLTAGES APPLIED AT SAID TWO TERMINALS IN ANALOGY TO THE DEPENDENCY EXISTING BETWEEN THE PRESSURE AT THE ENDS OF A CONDUIT BEING SIMULATED AND THE RATE OF FLOW OF FLUID PASSING THROUGH SAID CONDUIT.
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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |