GB1044404A - Telecommunications installation which includes a gas-filled transmission line - Google Patents

Telecommunications installation which includes a gas-filled transmission line

Info

Publication number
GB1044404A
GB1044404A GB626464A GB626464A GB1044404A GB 1044404 A GB1044404 A GB 1044404A GB 626464 A GB626464 A GB 626464A GB 626464 A GB626464 A GB 626464A GB 1044404 A GB1044404 A GB 1044404A
Authority
GB
United Kingdom
Prior art keywords
cable
supervisory
gas
station
central monitoring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB626464A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefunken Patentverwertungs GmbH
Original Assignee
Telefunken Patentverwertungs GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefunken Patentverwertungs GmbH filed Critical Telefunken Patentverwertungs GmbH
Publication of GB1044404A publication Critical patent/GB1044404A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2838—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for cables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G01M3/181—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for cables

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

1,044,404. Selective signalling. TELEFUNKEN PATENTVERWERTUNGSGESELLSCHAFT. Feb. 14, 1964 [April 26, 1963; [Oct. 11, 1963], No. 6264/64. Heading G4H. The location and type of fault arising in a telecommunications installation incorporating a gas-filled cable is detected by the absence of one or more signals arriving at a central monitoring station from one or more supervisory stations each operating at different audiofrequencies and each connected via a portion of the cable to the central monitoring station. In the embodiment shown, each of the supervisory stations A-N supplies its associated section of the cable 1 with gas to make up for leakage and also provides two currents of different frequency which are amplified at LV in the central monitoring station Z before being selectively rectified according to frequency at U1-U26 to control warning apparatus in the form of lights L1-L26 and a common buzzer W. In one station A, one of the frequencies is supplied by a generator TG1 and the other is supplied by a generator TG2 through high resistance line couplings LK1 and LK2 and if the rate of gas supply from, e.g. the supervisory station A to its associated section of the cable 1, exceeds a predetermined level or the gas pressure in the cable falls too low, TG2 is automatically disconnected by a relay contact or electronic switch s. Also, if the gas supply in a cylinder in the supervisory station A should fall below a specified minimum TG1 is automatically disconnected by a relay d. The absence of the current from TG1 or TG2 causes corresponding alarm relays R1 or R2 to switch on the warning light L1 or L2 and the common buzzer W. The other supervisory stations operate in a similar manner and the supervisory stations nearer the central monitoring station operate at higher frequencies than those further away so that all the currents arriving at the amplifier LV undergo the same amount of attenuation.
GB626464A 1963-04-26 1964-02-14 Telecommunications installation which includes a gas-filled transmission line Expired GB1044404A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DET23898A DE1155498B (en) 1963-04-26 1963-04-26 Circuit arrangement for signaling malfunctions in pressurized gas monitoring systems for telecommunication cables with permanent gas supply
DET0024876 1963-10-11

Publications (1)

Publication Number Publication Date
GB1044404A true GB1044404A (en) 1966-09-28

Family

ID=25999717

Family Applications (1)

Application Number Title Priority Date Filing Date
GB626464A Expired GB1044404A (en) 1963-04-26 1964-02-14 Telecommunications installation which includes a gas-filled transmission line

Country Status (2)

Country Link
DE (1) DE1155498B (en)
GB (1) GB1044404A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2306553A1 (en) * 1975-04-04 1976-10-29 Cables De Lyon Geoffroy Delore Fault detector for pneumatically pressurised electrical cables - requires four monitor lines to operate alarm and location functions

Also Published As

Publication number Publication date
DE1155498B (en) 1963-10-10

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