US3275892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for measuring current flow in high voltage electric power lines for relaying and other purposes
Assignee: Individual
•
Filing: 1963-06-07
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Granted: 1966-09-27
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Expires: 1983-06-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Edmund O Schweitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:03
CPC Classifications
H; H02; H02H; H02H1/00; H02H1/0007; G; G01; G01R; G01R15/00; G01R15/14; G01R15/18; G01R15/183; G01R15/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
APPARATUS FOR MEASURING THE FLOW OF CURRENT IN A HIGH VOLTAGE ELECTRIC POWER TRANSMISSION LINE CONDUCTOR AND TRANSMITTING A CORRESPONDING SIGNAL TO THE REMOTE POINT COMPRISING: (A) A TRANSMITTER OPERATING AT THE POTENTIAL OF SAID CONDUCTOR AND ARRANGED AND ADAPTED TO TRANSMIT A CARRIER FREQUENCY, (B) A MODULATING CIRCUIT CONNECTED TO SAID TRANSMITTER FOR NORMALLY CONTINUOUSLY APPLYING A MODULATING FREQUENCY TO SAID CARRIER FREQUENCY (C) MEANS RESPONSIVE TO CURRENT FLOW IN SAID CONDUCTOR FOR VARYING THE FREQUENCY OF SAID MODULATING FREQUENCY AS A FUNCTION OF THE MAGNITUDE OF SUCH CURRENT FLOW, (D) A RECEIVER AT SAID REMOTE POINT ARRANGED AND ADAPTED TO RECEIVE SAID CARRIER FREQUENCY MODULATED BY SAID MODULATING FREQUENCY, AND (E) MEANS RESPONSIVE TO THE RECEIVED MODULATING FREQUENCY.
Claim 2
Dependent Claim
120 words
APPARATUS FOR MEASURING THE FLOW OF CURRENT IN A HIGH VOLTAGE ELECTRIC POWER TRANSMISSION LINE CONDUCTOR AND TRANSMITTING A CORRESPONDING SIGNAL TO THE REMOTE POINT COMPRISING: (A) A TRANSMITTER OPERATING AT THE POTENTIAL OF SAID CONDUCTOR AND ARRANGED AND ADAPTED TO TRANSMIT A CARRIER FREQUENCY, (B) A MODULATING CIRCUIT CONNECTED TO SAID TRANSMITTER FOR NORMALLY CONTINUOUSLY APPLYING A MODULATING FREQUENCY TO SAID CARRIER FREQUENCY (C) MEANS RESPONSIVE TO CURRENT FLOW IN SAID CONDUCTOR FOR VARYING THE FREQUENCY OF SAID MODULATING FREQUENCY AS A FUNCTION OF THE MAGNITUDE OF SUCH CURRENT FLOW, (D) A RECEIVER AT SAID REMOTE POINT ARRANGED AND ADAPTED TO RECEIVE SAID CARRIER FREQUENCY MODULATED BY SAID MODULATING FREQUENCY, AND (E) MEANS RESPONSIVE TO THE RECEIVED MODULATING FREQUENCY.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |