US3909712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for measuring high ohmic cable faults in telecommunication and similar networks
Assignee: ThyssenKrupp Marine Systems GmbH
•
Filing: 1974-03-22
•
Granted: 1975-09-30
•
Expires: 1994-03-22
Abstract
Abstract A circuit arrangement for measuring high ohmic cable faults in telecommunication and similar networks comprises a D.C. voltage source and a pulse echo fault locator which are connected in parallel to a cable to be tested. The connection is effected in such a way that the pulse echo fault locator is isolated from said D.C. voltage source and that the pulses as well as the D.C. voltage are simultaneously applicable to the cable to bring about a change in the normal pulse echo pattern received from the fault in said cable. This change in the normal pulse echo pattern permits the fault in the cable to be recognized in the display and its position to be measured by said pulse echo fault locator by reference to its time base in a manner that is well understood.
Inventors
- 👤 Wolfdietrich Rietz
- 👤 Otto Knutz
- 👤 Erhard Neubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:05
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/08; G01R31/11
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
180 words
A circuit arrangement for measuring high ohmic faults in telecommunication and similar network cables comprising: a. a D.C. voltage source; b. a first pair of conductor means for connecting said D.C. voltage source to first and second conductors in said cable; c. a pulse echo fault locator, said pulse echo fault locator comprising a pulse generator and a receiver including a differential transformer; d. a second pair of conductor means for connecting said pulse generator to said first conductor in said cable and said differential transformer respectively; e. a third pair of conductor means, each including a capacitor, for connecting said differential transformer to said second conductor and a third conductor in said cable; and f. circuit means including a resistor and a capacitor for connecting said first and third conductors in said cable; g. whereby both a D.C. voltage and a pulse may be applied to said conductors in said cable, and the pulse reflected by a fault in said cable can be detected and measured by said receiver to determine the location of said fault in said cable.
Claim 2
Dependent Claim
180 words
A circuit arrangement for measuring high ohmic faults in telecommunication and similar network cables comprising: a. a D.C. voltage source; b. a first pair of conductor means for connecting said D.C. voltage source to first and second conductors in said cable; c. a pulse echo fault locator, said pulse echo fault locator comprising a pulse generator and a receiver including a differential transformer; d. a second pair of conductor means for connecting said pulse generator to said first conductor in said cable and said differential transformer respectively; e. a third pair of conductor means, each including a capacitor, for connecting said differential transformer to said second conductor and a third conductor in said cable; and f. circuit means including a resistor and a capacitor for connecting said first and third conductors in said cable; g. whereby both a D.C. voltage and a pulse may be applied to said conductors in said cable, and the pulse reflected by a fault in said cable can be detected and measured by said receiver to determine the location of said fault in said cable.
Claim 3
Dependent Claim
21 words
A circuit arrangement according to claim 1, wherein said D.C. voltage source is adapted to be cyclically switched on and off.
Claim 4
Dependent Claim
16 words
A circuit arrangement according to claim 1, wherein said D.C. voltage source is of reversible polarity.
Claim 5
Dependent Claim
17 words
A circuit arrangement according to claim 1, wherein said D.C. voltage source supplies a controllably variable voltage.
Claim 6
Dependent Claim
179 words
A circuit arrangement for measuring high ohmic faults in telecommunication and similar network cables comprising: a. a D.C. voltage source; b. a first pair of conductor means for connecting said D.C. voltage source to first and second conductors in said cable; c. a pulse echo fault locator, said pulse echo fault locator comprising a pulse generator and a receiver; d. a second pair of conductor means, each including a capacitor, for connecting said pulse generator to said first conductor and a third conductor in said cable respectively; e. a third pair of conductor means, each including a capacitor, for connecting said receiver to said second conductor and a fourth conductor in said cable; and f. circuit means including a resistor and a capacitor for connecting said third and fourth conductors in said cable; g. whereby both a D.C. voltage and a pulse may be applied to said conductors in said cable, and the pulse reflected by a fault in said cable can be detected and measured by said receiver to determine the location of said fault in said cable.
Claim 7
Dependent Claim
179 words
A circuit arrangement for measuring high ohmic faults in telecommunication and similar network cables comprising: a. a D.C. voltage source; b. a first pair of conductor means for connecting said D.C. voltage source to first and second conductors in said cable; c. a pulse echo fault locator, said pulse echo fault locator comprising a pulse generator and a receiver; d. a second pair of conductor means, each including a capacitor, for connecting said pulse generator to said first conductor and a third conductor in said cable respectively; e. a third pair of conductor means, each including a capacitor, for connecting said receiver to said second conductor and a fourth conductor in said cable; and f. circuit means including a resistor and a capacitor for connecting said third and fourth conductors in said cable; g. whereby both a D.C. voltage and a pulse may be applied to said conductors in said cable, and the pulse reflected by a fault in said cable can be detected and measured by said receiver to determine the location of said fault in said cable.
Claim 8
Dependent Claim
21 words
A circuit arrangement according to claim 5, wherein said D.C. voltage source is adapted to be cyclically switched on and off.
Claim 9
Dependent Claim
16 words
A circuit arrangement according to claim 5, wherein said D.C. voltage source is of reversible polarity.
Claim 10
Dependent Claim
17 words
A circuit arrangement according to claim 5, wherein said D.C. voltage source supplies a controllably variable voltage.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |