GB576344A - Improvements in electrical testing and measuring apparatus and in methods of effecting electrical tests and measurements - Google Patents
Improvements in electrical testing and measuring apparatus and in methods of effecting electrical tests and measurementsInfo
- Publication number
- GB576344A GB576344A GB892/44A GB89244A GB576344A GB 576344 A GB576344 A GB 576344A GB 892/44 A GB892/44 A GB 892/44A GB 89244 A GB89244 A GB 89244A GB 576344 A GB576344 A GB 576344A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conductor
- plates
- screen
- eccentricity
- electrical
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
- G01R31/59—Testing of lines, cables or conductors while the cable continuously passes the testing apparatus, e.g. during manufacture
Abstract
576,344. Correspondence control systems. MARCONI INSTRUMENTS, Ltd., BARTLEY, W. B., and BROCKELSBY, C. F. Jan. 17, 1944, No. 892. [Class 40 (i)] [Also in Group XXXVI] A conductor to be located varies the screening between two electrical systems. Fig. 1 shows an arrangement for determining the eccentricity of the conductor in an insulated cable. The cable, consisting of the conductor 1 and insulating sheath 2, is guided between metal plates 3, 4. Adjacent parts of conductors 11, 12 run parallel to the conductor 1. The conductor 11 carries an alternating current, a voltmeter being connected to the conductor 12. The conductor 1 and the plates 3, 4 form a screen between the conductors 11, 12, this screen being symmetrical if the conductor 1 is co-axial with the sheath 2. Any eccentricity of the conductor 1 causes unsymmetrical screening and a consequent indication on the voltmeter. In a modification, Fig. 2, a source 10 of alternating E.M.F. is arranged to produce potentials of equal amplitude and opposite phase relative to earth on metal plates 5, 6. A metal plate 7 is connected to earth through an instrument 8. Earthed plates 3, 4, in conjunction with the conductor 1, form an electrostatic screen between the plate 7 and the plates 5, 6, the symmetry of this screen being upset by any eccentricity of the conductor 1. A similar system at right angles to the one shown will show displacements in a direction at right angles to the plates 3, 4. These two indications may be combined on the screen of a cathode-ray oscillograph to indicate the position of the conductor 1. The displacement currents may be separately employed to restore the conductor 1 to co-axiality in succeeding portions of the cable during manufacture. The system may also be used to detect the movement of a metal object moved by a device to indicate liquid level, rate of flow, specific gravity, or pressure, and also to detect the movement of the pointer of an electrical measuring instrument indicating temperature, pH value, conductivity, voltage, current, or frequency. The current due to the unbalance may operate auxiliary gear for the control of any process or quantity, or to restore its earlier condition.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB892/44A GB576344A (en) | 1944-01-17 | 1944-01-17 | Improvements in electrical testing and measuring apparatus and in methods of effecting electrical tests and measurements |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB892/44A GB576344A (en) | 1944-01-17 | 1944-01-17 | Improvements in electrical testing and measuring apparatus and in methods of effecting electrical tests and measurements |
Publications (1)
Publication Number | Publication Date |
---|---|
GB576344A true GB576344A (en) | 1946-03-29 |
Family
ID=9712315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB892/44A Expired GB576344A (en) | 1944-01-17 | 1944-01-17 | Improvements in electrical testing and measuring apparatus and in methods of effecting electrical tests and measurements |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB576344A (en) |
-
1944
- 1944-01-17 GB GB892/44A patent/GB576344A/en not_active Expired
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