US3758728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Repeater fault localization system
Assignee: Telecommunications Radioelectriques et Telephoniques SA TRT
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Filing: 1972-06-22
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Granted: 1973-09-11
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Expires: 1992-06-22
Abstract
Abstract A repeater fault localization system for line repeaters which are distributed in attelecommunication network and are fed by a remote supply source which is arranged in the initial station. This station includes a transmitter for feedback command signals, which transmitter consists of an inverter for the remote supply voltage and in which a receiver for feedback command signals is arranged in each amplifier, which receiver consists of a relay for feeding back the line repeaters, the relay being connected to a store which is excited when the voltage pulses are applied with the reversed polarity to the line repeaters in order that contacts of the relay switch off the supply line behind a fedback line repeater. Use: localization of faulty line repeaters.
Inventors
- 👤 Roch E Le
- 👤 R Troncy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:52
CPC Classifications
H; H04; H04B; H04B17/00; H04B17/40; H04B17/407; H04B17/408
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
299 words
A system for localizing faulty line repeaters present in repeater stations which are located at mutual distances in a transmission path connecting two terminal stations, each repeater station comprising a first line repeater in the West-East line and a second line repeater in the East-West line of the transmission path, said line repeaters being remotely fed from a remote supply line connected to a direct voltage supply source in one of said terminal stations, each repeater station comprising a relay including first relay contacts which in the operative condition of said relay close a link connecting the output of said first line repeater to the input of said second line repeater, and receiving means for operating said relay in response to a command signal transmitted by a transmitter in one of said terminal stations, characterized in that said transmitter comprises a polarity reversal switch arranged in series with the remote supply line, said polarity reversal switch having a first position in which the supply voltage is applied with the normal polarity to said supply line and a second position in which the supply voltage is applied with reversed polarity to said line, and in that the receiving means in each repeater station is connected to the remote supply line to operate the relay in response to the supply voltage of reversed polarity, and means including a memory in each repeater station for preventing said relay from being operated once it has assumed its normal rest position after first having been operated by said supply voltage of reversed polarity, said relay further comprising second relay contacts which in the operative condition of the relay prevent the supply voltage of reversed polarity from being applied to the repeater stations beyond the one in which the relay is in the operative condition.
Claim 2
Independent Claim
299 words
A system for localizing faulty line repeaters present in repeater stations which are located at mutual distances in a transmission path connecting two terminal stations, each repeater station comprising a first line repeater in the West-East line and a second line repeater in the East-West line of the transmission path, said line repeaters being remotely fed from a remote supply line connected to a direct voltage supply source in one of said terminal stations, each repeater station comprising a relay including first relay contacts which in the operative condition of said relay close a link connecting the output of said first line repeater to the input of said second line repeater, and receiving means for operating said relay in response to a command signal transmitted by a transmitter in one of said terminal stations, characterized in that said transmitter comprises a polarity reversal switch arranged in series with the remote supply line, said polarity reversal switch having a first position in which the supply voltage is applied with the normal polarity to said supply line and a second position in which the supply voltage is applied with reversed polarity to said line, and in that the receiving means in each repeater station is connected to the remote supply line to operate the relay in response to the supply voltage of reversed polarity, and means including a memory in each repeater station for preventing said relay from being operated once it has assumed its normal rest position after first having been operated by said supply voltage of reversed polarity, said relay further comprising second relay contacts which in the operative condition of the relay prevent the supply voltage of reversed polarity from being applied to the repeater stations beyond the one in which the relay is in the operative condition.
Claim 3
Dependent Claim
28 words
A system as claimed in claim 1, characterized in that the supply line consists of the phantom circuit which is constituted by two transmission pairs of the connection.
Claim 4
Dependent Claim
50 words
A system as claimed in claim 1, characterized in that the supply voltage of each line repeater and particularly of the receiving means for receiving the command signals is provided by a supply voltage stabilization circuit which is arranged in parallel with the supply line through a diode bridge circuit.
Claim 5
Dependent Claim
80 words
A system as claimed in claim 1, characterized in that the supply voltage for each repeater and particularly for the receiver of the feedback command signals is provided by a supply voltage stabilization circuit which is arranged in series with the supply line, said circuit including a series arrangement of two oppositely poled Zener diodes, while a bridge circuit of diodes is connected to the terminals of said circuit arrangement, which circuit provides the supply voltage for the line repeater.
Claim 6
Dependent Claim
163 words
A system as claimed in claim 1, characterized in that in the receiving means for the command signals The winding of the relay is connected to the output electrode of a transistor whose base control circuit is connected at one end to a cable of the supply line through a first diode which is arranged in such a manner that the relay can be excited when the supply voltage is applied with reversed polarity to the line repeater, while the said base control circuit is connected at the other end to the anode of a thyristor which constitutes the said memory and this through a second diode which is oppositely poled with respect to the base control circuit and the first diode, the control electrode of the transistor being connected to a capacitor through a rest contact of the relay said capacitor being also connected to the supply voltage stabilisation circuit which feeds the line repeater through a work contact of the relay.
Claim 7
Dependent Claim
72 words
A test system for the terminal station and the subscriber lines which are connected to said station, characterized in that for transmitting test command signals from the initial station the system includes a localizing system as claimed claim 1, which test command signals are formed by polarity reversals by means of a polarity reversal switch at the supply line after all line repeaters of the connection are brought to the non-reactive state.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |