GB794933A - Improvements in or relating to metal tubes or metal sheaths of electric cables - Google Patents

Improvements in or relating to metal tubes or metal sheaths of electric cables

Info

Publication number
GB794933A
GB794933A GB714156A GB714156A GB794933A GB 794933 A GB794933 A GB 794933A GB 714156 A GB714156 A GB 714156A GB 714156 A GB714156 A GB 714156A GB 794933 A GB794933 A GB 794933A
Authority
GB
United Kingdom
Prior art keywords
corrugations
diameter
maximum
metal
relating
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
GB714156A
Inventor
James Ronald Penrose
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.)
Pirelli General Cable Works Ltd
Pirelli General Cable Works
Original Assignee
Pirelli General Cable Works Ltd
Pirelli General Cable Works
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 Pirelli General Cable Works Ltd, Pirelli General Cable Works filed Critical Pirelli General Cable Works Ltd
Priority to GB714156A priority Critical patent/GB794933A/en
Publication of GB794933A publication Critical patent/GB794933A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/20—Metal tubes, e.g. lead sheaths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D15/00—Corrugating tubes
    • B21D15/04—Corrugating tubes transversely, e.g. helically
    • B21D15/06—Corrugating tubes transversely, e.g. helically annularly

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insulated Conductors (AREA)

Abstract

794,933. Making corrugated tubing. PIRELLI-GENERAL CABLE WORKS, Ltd. Nov. 16, 1956 [March 7, 1956], No. 7141/56. Class 83 (2). [Also in Groups XXVIII and XXXVI] In making circumferentially or helically corrugated metal tubing or cable sheathing wherein the minimum interior diameter of the corrugations lies between 0.75 and 0.88 of the maximum exterior diameter, the pitch of the corrugations is between 0.15 and 0.25 of said maximum diameter, and the thickness of the wall is between 0.005 and 0.02 of said maximum diameter, measured in inches, + 0.0025 inch, one or more corrugating tools are rotated around the axis of a plain metal tube or cable sheath to exert pressure on the external surface thereof to produce corrugations of the dimensions specified. The radius of the working portion of each corrugating tool lies between 0.03 and 0.05 of the maximum exterior diameter of the corrugations. Specifications 720,650 and 736,704 are referred to.
GB714156A 1956-03-07 1956-03-07 Improvements in or relating to metal tubes or metal sheaths of electric cables Expired GB794933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB714156A GB794933A (en) 1956-03-07 1956-03-07 Improvements in or relating to metal tubes or metal sheaths of electric cables

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB714156A GB794933A (en) 1956-03-07 1956-03-07 Improvements in or relating to metal tubes or metal sheaths of electric cables

Publications (1)

Publication Number Publication Date
GB794933A true GB794933A (en) 1958-05-14

Family

ID=9827398

Family Applications (1)

Application Number Title Priority Date Filing Date
GB714156A Expired GB794933A (en) 1956-03-07 1956-03-07 Improvements in or relating to metal tubes or metal sheaths of electric cables

Country Status (1)

Country Link
GB (1) GB794933A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3582536A (en) * 1969-04-28 1971-06-01 Andrew Corp Corrugated coaxial cable

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3582536A (en) * 1969-04-28 1971-06-01 Andrew Corp Corrugated coaxial cable

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