GB813452A - Testing of wire ropes - Google Patents

Testing of wire ropes

Info

Publication number
GB813452A
GB813452A GB34359/55A GB3435955A GB813452A GB 813452 A GB813452 A GB 813452A GB 34359/55 A GB34359/55 A GB 34359/55A GB 3435955 A GB3435955 A GB 3435955A GB 813452 A GB813452 A GB 813452A
Authority
GB
United Kingdom
Prior art keywords
rope
coils
coil
search
berthold
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
GB34359/55A
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 GB813452A publication Critical patent/GB813452A/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
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/904—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents with two or more sensors

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

813,452. Electric tests. BERTHOLD, R. [trading as LABORATORIUM PROF. DR. BERTHOLD]. Nov. 30, 1955 [Dec. 2, 1954], No. 34359/55. Class 37. In a method of testing wire ropes for broken strands in which one or more coils surrounding the rope produce a flux in it and a broken strand produces stray flux which is detected by a search coil also surrounding the rope, the current for exciting the field is of at least 100 amperes, thus reducing the number of turns necessary and is supplied by the rectified output of a three-phase transformer. A.C. ripple in the output is eliminated by filters and a pair of search coils side by side and connected in opposition, may balance out the effect of variations such as changes in mains voltage which affect the entire length of rope while a flaw such as a broken strand will produce spaced pulses in the two coils. The coil may be made with a break in its circumference and with a hinge at the end of the diameter of the break to enable it to be put over the rope. A pair of search coils may be slightly staggered circumferentially so as to ensure that the flow is not undetected because of the gap in the coil circumference.
GB34359/55A 1954-12-02 1955-11-30 Testing of wire ropes Expired GB813452A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE813452X 1954-12-02

Publications (1)

Publication Number Publication Date
GB813452A true GB813452A (en) 1959-05-13

Family

ID=6733365

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34359/55A Expired GB813452A (en) 1954-12-02 1955-11-30 Testing of wire ropes

Country Status (1)

Country Link
GB (1) GB813452A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112197804A (en) * 2020-09-24 2021-01-08 嘉兴卓凡机械科技有限公司 Improved sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112197804A (en) * 2020-09-24 2021-01-08 嘉兴卓凡机械科技有限公司 Improved sensor

Similar Documents

Publication Publication Date Title
GB813452A (en) Testing of wire ropes
CH370154A (en) Device for detecting electrical variables of the excitation circuit of electrical machines, in particular synchronous machines, in which a DC exciter winding is excited by the rotating armature of an AC exciter machine via rotating rectifiers
DE939887C (en) Testing device for magnetic sheets
US2862197A (en) Amplitude discriminator
SU126952A1 (en) Method of monitoring and sorting cores for magnetic amplifiers
JPS56154657A (en) Probe coil for whirling crack detection
DE831117C (en) Use of the induction method with exciter and test magnet for testing built-in coils
GB890070A (en) An improved method of detecting defects in elongated metallic objects
SU115261A1 (en) Method for increasing sensitivity of magnetometric devices
JPS5724853A (en) Eddy current type flaw detector
SU126949A1 (en) Device for measuring the power of electrical losses in metal objects located in the zone of magnetic fields
GB766080A (en) Improvements in or relating to alternating current responsive induction instruments
SU109315A1 (en) Brake device coils kanatovyh machines
JPS5748662A (en) Large current measuring device
SU1401365A1 (en) Flaw detector for checking long-sized ferromagnetic articles
SU64087A1 (en) Method for detecting short-circuited turns in iron-core coils
SU62642A1 (en) Voltage regulation method in resistance welding machines
Cullwick Theory of the Three-Wire DC. Generator with Two-Phase Static Balancer With Special Reference to Magnetic Phenomena in the Balance Core
SU103988A1 (en) Test method for coil insulation of electric machines
SU47368A1 (en) Device for measuring large direct current forces
GB758107A (en) Improvements in or relating to coils for carrying electric current
GB1067677A (en) Improvements in and relating to magnetic transducers
SU113356A1 (en) The method of measuring the grounding resistance of metal poles of power lines
GB566227A (en) Improvements in electromagnetic gauges
DE120994C (en)