GB686051A - Improvements in or relating to electrical testing devices - Google Patents

Improvements in or relating to electrical testing devices

Info

Publication number
GB686051A
GB686051A GB2710750A GB2710750A GB686051A GB 686051 A GB686051 A GB 686051A GB 2710750 A GB2710750 A GB 2710750A GB 2710750 A GB2710750 A GB 2710750A GB 686051 A GB686051 A GB 686051A
Authority
GB
United Kingdom
Prior art keywords
spike
soil
ring
plate
switch
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
GB2710750A
Inventor
William Frederick Higgins
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.)
F H Hughes & Co Ltd
Original Assignee
F H Hughes & Co Ltd
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 F H Hughes & Co Ltd filed Critical F H Hughes & Co Ltd
Priority to GB2710750A priority Critical patent/GB686051A/en
Publication of GB686051A publication Critical patent/GB686051A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24—Earth materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
    • G01R27/18—Measuring resistance to earth, i.e. line to ground

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Remote Sensing (AREA)
  • Geology (AREA)
  • Medicinal Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

686,051. Earth testing; bridge circuits. HUGHES & CO., Ltd., F. H. Nov. 26, 1951 [Nov. 6, 1950], No. 27107/50. Class 37. In order to test the soil as a preliminary to the installation of cathodic protection for metal structures in the soil against corrosion, a probe is inserted into the soil, which probe has parts of two dissimilar metals insulated from each other and connected to a bridge. The probe comprises a hollow ebonite rod 5, Fig. 1, an insulator block 6, a steel spike 7 and a magnesium alloy ring 8. A metal tube 9 is screwed into the spike 7 at its lower end and passes through a plate 11 at its upper end. A nut 12 clamps the parts 6, 8, 5 between the spike 7 and the plate 11. A terminal head 13 is attached to the plate 11 by screws 14 and has a pair of sockets 15, 16 connected to the ring 8 and spike 7. The assembly 7, 6, 8 is made with a slight taper so that it increases gradually in diameter away from the point and thereby ensures good contact when pushed into the ground. The sockets 15, 16 are engaged by pins 21, 22 carried by an insulating plate 23 and forming a detachable plug. The pins 21, 22 are connected to terminals S1, S2, Fig. 2, on a measuring instrument 26, which comprises a pair of fixed resistances R1, R2, Fig. 2, a variable resistance Rv which is varied by a rotary member 27, and a switch T1. The resistance of the cell formed by the parts 7, 8 in the soil is indicated by the position of'the member 27 when this has been set so that no change in the reading of the galvanometer G occurs when the switch T1 is opened and closed. The switch T1 may be arranged to be operated rapidly by a mechanically driven contactor. The potential between the spike 7 and ring 8 in the ground may also be measured. The spike 7 and ring 8 may be made of metals other than steel and magnesium alloy, e.g. one part may be of magnesium, or magnesium alloy while the other part is made from ferrous metals, brasses, bronzes, copper, copper alloys, aluminium, aluminium alloys, zinc, or zinc alloys.
GB2710750A 1950-11-06 1950-11-06 Improvements in or relating to electrical testing devices Expired GB686051A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2710750A GB686051A (en) 1950-11-06 1950-11-06 Improvements in or relating to electrical testing devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2710750A GB686051A (en) 1950-11-06 1950-11-06 Improvements in or relating to electrical testing devices

Publications (1)

Publication Number Publication Date
GB686051A true GB686051A (en) 1953-01-14

Family

ID=10254299

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2710750A Expired GB686051A (en) 1950-11-06 1950-11-06 Improvements in or relating to electrical testing devices

Country Status (1)

Country Link
GB (1) GB686051A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2906952A (en) * 1955-01-10 1959-09-29 Horecky Stanley Device for measuring and for regulating moisture content of soil or the like
US3019384A (en) * 1958-10-20 1962-01-30 Harry A Wayne Moisture indicating device
GB2172110A (en) * 1985-03-04 1986-09-10 Jacob Jackson Electrical testing device for soils
CN108845107A (en) * 2018-06-22 2018-11-20 德清绿色阳光农业生态有限公司 A kind of soil testing device of forestry plantation
CN110053057A (en) * 2019-04-28 2019-07-26 深圳市万臣科技有限公司 Liquid relief component

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2906952A (en) * 1955-01-10 1959-09-29 Horecky Stanley Device for measuring and for regulating moisture content of soil or the like
US3019384A (en) * 1958-10-20 1962-01-30 Harry A Wayne Moisture indicating device
GB2172110A (en) * 1985-03-04 1986-09-10 Jacob Jackson Electrical testing device for soils
CN108845107A (en) * 2018-06-22 2018-11-20 德清绿色阳光农业生态有限公司 A kind of soil testing device of forestry plantation
CN110053057A (en) * 2019-04-28 2019-07-26 深圳市万臣科技有限公司 Liquid relief component
CN110053057B (en) * 2019-04-28 2023-08-18 深圳市万臣科技有限公司 Pipetting assembly

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