GB919517A - A system for detecting, indicating and locating automatically liquid or gas leaks or excessive temperatures at separate fixed points or over a continuous length or distance - Google Patents

A system for detecting, indicating and locating automatically liquid or gas leaks or excessive temperatures at separate fixed points or over a continuous length or distance

Info

Publication number
GB919517A
GB919517A GB1915459A GB1915459A GB919517A GB 919517 A GB919517 A GB 919517A GB 1915459 A GB1915459 A GB 1915459A GB 1915459 A GB1915459 A GB 1915459A GB 919517 A GB919517 A GB 919517A
Authority
GB
United Kingdom
Prior art keywords
liquid
conductors
indicating
detecting
sheath
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
GB1915459A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB919517A publication Critical patent/GB919517A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
    • 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
    • G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
    • G01M3/045—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

919,517. Temperature and like alarm systems. GSTALDER, R. June 4, 1959 [June 4, 1958], No. 19154/59. Class 118. [Also in Group XXVIII] In a system for detecting, indicating and locating liquid or gas leaks or excessive temperatures, e.g. along a pipe-line, two conductors f 1 and f 2 (Fig. 1) of which at least one is insulated, are bound together at least at closely spaced points and laid along the length to be protected. The insulating material chosen is such that the leaking gas or liquid or the rise in temperature breaks down the insulation between the conductors f 1 , f 2 , thus completing a circuit for a relay E which operates visual and audible alarms V, S. The location of the fault is also indicated on a resistance-measuring electric or electronic meter M. The conductors f 1 , f 2 may be held parallel to each other or twisted together and may be separated by the insulating material continuously or at intervals along their length and may be enclosed in a sheath of coiled wire or steel tape between the turns of which the gas or liquid can seep; alternatively, a single insulated conductor may be enclosed in an uninsulated earth-return sheath, the inner conductor being corrugated so as to contact the sheath.
GB1915459A 1958-06-04 1959-06-04 A system for detecting, indicating and locating automatically liquid or gas leaks or excessive temperatures at separate fixed points or over a continuous length or distance Expired GB919517A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6252 1958-06-04

Publications (1)

Publication Number Publication Date
GB919517A true GB919517A (en) 1963-02-27

Family

ID=8571376

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1915459A Expired GB919517A (en) 1958-06-04 1959-06-04 A system for detecting, indicating and locating automatically liquid or gas leaks or excessive temperatures at separate fixed points or over a continuous length or distance

Country Status (1)

Country Link
GB (1) GB919517A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2151059A (en) * 1983-12-08 1985-07-10 Helmersson Rune Alarm apparatus for pipes
US5015958A (en) 1983-06-30 1991-05-14 Raychem Corporation Elongate sensors comprising conductive polymers, and methods and apparatus using such sensors
US5235286A (en) 1985-06-12 1993-08-10 Raychem Corporation Method for detecting and obtaining information about changers in variables
US5382909A (en) 1983-06-30 1995-01-17 Raychem Corporation Method for detecting and obtaining information about changes in variables
WO2016176707A1 (en) * 2015-05-05 2016-11-10 Ke Kelit Kunststoffwerk Gesellschaft M.B.H. Leak measurement arrangement for installation in a thermal insulation between an inner and an outer pipe of a water line

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5015958A (en) 1983-06-30 1991-05-14 Raychem Corporation Elongate sensors comprising conductive polymers, and methods and apparatus using such sensors
US5382909A (en) 1983-06-30 1995-01-17 Raychem Corporation Method for detecting and obtaining information about changes in variables
GB2151059A (en) * 1983-12-08 1985-07-10 Helmersson Rune Alarm apparatus for pipes
US5235286A (en) 1985-06-12 1993-08-10 Raychem Corporation Method for detecting and obtaining information about changers in variables
WO2016176707A1 (en) * 2015-05-05 2016-11-10 Ke Kelit Kunststoffwerk Gesellschaft M.B.H. Leak measurement arrangement for installation in a thermal insulation between an inner and an outer pipe of a water line
EP3292386B1 (en) * 2015-05-05 2021-03-10 KE KELIT GmbH Device for measuring of leaks that is suitable for running in heat insulation between the inside and outside pipes of a water pipe

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