US3105883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure transducer testing circuit
Assignee: AT&T Inc
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Filing: 1962-08-29
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Granted: 1963-10-01
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Expires: 1982-08-29
Abstract
No abstract record available.
Inventors
- 👤 Jr George E Higson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:12
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/28; G01M3/2838; G01M3/04; G01M3/16; G01M3/18; G01M3/181
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN A TELEPHONE SYSTEM, A CENTRAL OFFICE INCLUDING A TEST STATION, A PLURALITY OF LINE PAIRS EXTENDING FROM SAID CENTRAL OFFICE IN A PRESSURIZED CABLE, AND MEANS FOR MEASURING THE PRESSURE WITHIN SAID CABLE AT A NUMBER OF PRESCRIBED LOCATIONS ALONG ITS LENGTH, SAID PRESSURE MEASURING MEANS COMPRISING A TRANSDUCER AT EACH OF SAID PRESCRIBED LOCATIONS FOR CONVERTING PRESSURE WITHIN SAID CABLE TO RESISTANCE, SIGNAL RESPONSIVE MEANS AT EACH OF SAID LOCATIONS FOR CONNECTING SAID TRANSDUCER ACROSS ONE OF SAID LINE PAIRS IN RESPONSE TO CODED SIGNALS TRANSMITTED FROM SAID TEST STATION TO SAID TRANSDUCER LOCATION OVER ANOTHER ONE OF SAID LINE PAIRS, AND MEANS AT SAID TEST STATION FOR INDIVIDUALLY MEASURING THE RESISTANCE OF THE TRANSDUCER THAT AT ANY INSTANT IS CONNECTED ACROSS SAID ONE LINE PAIR.
Claim 2
Dependent Claim
128 words
IN A TELEPHONE SYSTEM, A CENTRAL OFFICE INCLUDING A TEST STATION, A PLURALITY OF LINE PAIRS EXTENDING FROM SAID CENTRAL OFFICE IN A PRESSURIZED CABLE, AND MEANS FOR MEASURING THE PRESSURE WITHIN SAID CABLE AT A NUMBER OF PRESCRIBED LOCATIONS ALONG ITS LENGTH, SAID PRESSURE MEASURING MEANS COMPRISING A TRANSDUCER AT EACH OF SAID PRESCRIBED LOCATIONS FOR CONVERTING PRESSURE WITHIN SAID CABLE TO RESISTANCE, SIGNAL RESPONSIVE MEANS AT EACH OF SAID LOCATIONS FOR CONNECTING SAID TRANSDUCER ACROSS ONE OF SAID LINE PAIRS IN RESPONSE TO CODED SIGNALS TRANSMITTED FROM SAID TEST STATION TO SAID TRANSDUCER LOCATION OVER ANOTHER ONE OF SAID LINE PAIRS, AND MEANS AT SAID TEST STATION FOR INDIVIDUALLY MEASURING THE RESISTANCE OF THE TRANSDUCER THAT AT ANY INSTANT IS CONNECTED ACROSS SAID ONE LINE PAIR.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-30 | 1967-04-01 | 1967-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-30 | 1971-04-01 | 1971-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-30 | 1975-04-01 | 1975-10-01 | $7700.00 | Window Closed / Lapsed |