Patent US2186723A successfully refreshed from Google Patents.
Patent US3187104A successfully refreshed from Google Patents.
US3187104A
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Circuit for eliminating attenuation differences in communication lines
Assignee: Siemens and Halske AG
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Filing: 1961-09-18
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Granted: 1965-06-01
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Expires: 1981-09-18
Abstract
No abstract record available.
Inventors
- 👤 Ebel Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:29
CPC Classifications
H; H04; H04Q; H04Q3/00; H04B; H04B3/00; H04B3/02; H04B3/40; H04B3/42; H04B3/44; H04M; H04M3/00; H04M3/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A CIRCUIT ARRANGEMENT FOR ELIMINATING THE ATTENUATION DIFFERENCE OCCURRING IN CONNECTION WITH COMMUNICATION LINES OF DIFFERENT LENGTH, WHEREIN A COMMUNICATION LINE IS UTILIZED FOR THE TRANSMISSION OF COMMUNICATION SIGNALS AS WELL AS FOR THE TRANSMISSION OF BATTERY ENERGY TO A LOAD DISPOSED AT THE END OF THE COMMUNICATION LINE, AND WHEREIN THE COMMUNICATION LINE IS CONNECTED OVER AT LEAST ONE FEED-IN RESISTOR TO A COMMON DIRECT VOLTAGE SOURCE, WHEREBY A VOLTAGE DIVIDER IS FORMED BY THE FEEDIN RESISTOR AND THE INPUT RESISTANCE OF THE COMMUNICATION LINE, COMPRISIGN A NETWORK CONNECTED IN THE COMMUNICATION LINE ANDE ADAPTED TO CONDUCT DIRECT CURRENT, SAID NETWORK HAVING A CONTROLLABLE ATTENUATOR DISPOSED IN THE SIGNAL PATH FOR EFFECTING VARIABLE ATTENUATION OF THE COMMUNICATION SIGNALS, AND MEANS FOR OPERATIVELY CONNECTING THE ATTENUATOR TO SAID NETWORK WHEREBY THE ATTENUATION VALUE OF SAID ATTENUATOR IS CONTROLLABLE BY A LEAST ONE OF THE DIRECT VOLTAGES OBTAINED AT THE RESISTORS OF SAID VOLTAGE DIVIDER.
Claim 2
Dependent Claim
154 words
A CIRCUIT ARRANGEMENT FOR ELIMINATING THE ATTENUATION DIFFERENCE OCCURRING IN CONNECTION WITH COMMUNICATION LINES OF DIFFERENT LENGTH, WHEREIN A COMMUNICATION LINE IS UTILIZED FOR THE TRANSMISSION OF COMMUNICATION SIGNALS AS WELL AS FOR THE TRANSMISSION OF BATTERY ENERGY TO A LOAD DISPOSED AT THE END OF THE COMMUNICATION LINE, AND WHEREIN THE COMMUNICATION LINE IS CONNECTED OVER AT LEAST ONE FEED-IN RESISTOR TO A COMMON DIRECT VOLTAGE SOURCE, WHEREBY A VOLTAGE DIVIDER IS FORMED BY THE FEEDIN RESISTOR AND THE INPUT RESISTANCE OF THE COMMUNICATION LINE, COMPRISIGN A NETWORK CONNECTED IN THE COMMUNICATION LINE ANDE ADAPTED TO CONDUCT DIRECT CURRENT, SAID NETWORK HAVING A CONTROLLABLE ATTENUATOR DISPOSED IN THE SIGNAL PATH FOR EFFECTING VARIABLE ATTENUATION OF THE COMMUNICATION SIGNALS, AND MEANS FOR OPERATIVELY CONNECTING THE ATTENUATOR TO SAID NETWORK WHEREBY THE ATTENUATION VALUE OF SAID ATTENUATOR IS CONTROLLABLE BY A LEAST ONE OF THE DIRECT VOLTAGES OBTAINED AT THE RESISTORS OF SAID VOLTAGE DIVIDER.
References Cited (Backward Citations)
US2620402A
Cited
US3035122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |