US3667506A - Corrugated metal tube for an external conductor or sheath of an electric cable - Google Patents
Corrugated metal tube for an external conductor or sheath of an electric cable Download PDFInfo
- Publication number
- US3667506A US3667506A US99205A US3667506DA US3667506A US 3667506 A US3667506 A US 3667506A US 99205 A US99205 A US 99205A US 3667506D A US3667506D A US 3667506DA US 3667506 A US3667506 A US 3667506A
- Authority
- US
- United States
- Prior art keywords
- metal tube
- corrugations
- strip
- tube
- corrugation
- 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 - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
- F16L11/16—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics wound from profiled strips or bands
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
-
- 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
- H01B7/202—Longitudinal lapped metal tubes
Definitions
- the corrugations of the two zones readily overlap one another, and the internal zone cannot penetrate below the external zone over a greater length than that of the latter, since its edge comes to abut on the narrows of the corrugations at the place where the external zone is connected to the remainder of the width of the strip.
- the strip therefore, cannot be wound on a smaller diameter than that which results from these arrangements.
- the corrugations of the internal zone overlap perfectly in the corrugations of the external zone, and the edge of the said internal zone comes to abut at the discontinuity in the corrugations at the end of the external zone, since at this region the corrugations which thus come opposite one another are offset relative to one another by the amount of half a corrugation.
- FIG. 1 is a perspective view of the corrugated strip before it is curved
- FIG. 2 is a perspective view of a section of tube produced by means of this stri DESCRIPTIO OF THE PREFERRED EMBODIMENT
- A designates,- the external lateral edge of the'strip, B the internal lateral edge, and C the line of discontinuity in the corrugations.
- the corrugations are progressively oflset by half a corrugation, that is to say by onehalf, and the corrugations on either side of the line C are also offset by half a corrugation.
- the corrugations of the edge A are in register with the corrugations of the edge 8 and are placed exactly on these, until they come to abut on the discontinuities of the line C; therefore, the amount of overlap cannot exceed a length greater than the distance L between the lines B and C.
- the invention is independent of the nature of the material of which the strip is made, which may be for example a bimetallic material, and also of the means used for assembling the two overlapping zones, which may include for example welding or the use of an adhesive substance.
- the invention has as its object to provide a flexible tube, the
- This tube which comprises undulations or corrugations of anydesired profile, is characterized in that, on the one hand,
- a flexible metal tube comprising: a wound corrugated strip forming a cylinder, the direction of the corrugations being inclined relative to the transverse axis of the strip such that the pitch is equal to one-half the width of a corrugation,
- the corrugations of the strip intermediate of its overlapped edges being abruptly laterally oflset a distance equal to the width of a half corrugation, such that the valleys of one portion of the corrugated tube to the side of the demarcation line formed by the offset, are in alignment with the apices of the tube portion to the other side of said demarcation line.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Manufacturing Of Electric Cables (AREA)
- Supports For Pipes And Cables (AREA)
- Insulated Conductors (AREA)
Abstract
A corrugated metal strip is curved and transversely overlapped to form a tube, the corrugation being inclined relative to the transverse axis such that the edges have their corrugations axially offset by half a corrugation and the external zone in turn is axially offset by one half a corrugation to define an edge abutment determining the exact diameter of the completed tube.
Description
1 51 June 6,1972
United States Patent Jocteur [5 References Cited UNITED STATES PATENTS [54] CORRUGATED METAL TUBE FOR AN EXTERNAL CONDUCTOR 0R SHEATH OF AN ELECTRIC CABLE [72] Inventor:
138/121 ...l38/l73 l38/l73 2,606,953 1,652,703 12/1927 Cushman.
Robert Jocteur, Lyon, France [731 Assignees Cable De Lyon Alsacienne, Lyon, France 221 Filed: Dec. 17,1970
21 Appl.No.: 99,205
Primary ExaminerMartin P. Schwadron Assistant Examiner-Ronald H. Lazarus Attorney-Sughrue, Rothwell, Mion, Zinn & Macpeak [57] ABSTRACT A corrugated metal strip is curved and transversely over- [30] Foreign Application Priority Data Dec. 18, 1969 lapped to form a tube, the corrugation being inclined relative to the transverse axis such that the edges have their corrugations axially offset by half a corrugation and the external zone 51 l38/l2l,l22, 173,150,151, 138/154, 156; 72/368; 29/4773; 174 102 D, 102 R,
in turn is axially offset by one half a corrugation to define an edge abutment detemtining the exact diameter of the completed tube.
[58] Field of 4 Claims, 2 Drawing Figures PATENTEDJUH 6 1972 FIG FIG. 2
CORRUGATED METAL TUBE FOR AN EXTERNAL CONDUCTOR OR SHEATH OF-AN ELECTRIC CABLE BACKGROUND or THE INVENTION a 2. Description of the Prior Art A Means have already been proposed for obtaining a satisfactory application of these two overlap zones on one another.
For example it has been proposed, in a tube comprising pseudosinusoidal corrugations, the profile of which is constituted by an alternating succession of convex portions and concave portions, to give the convex portions of the external zone a larger radius of curvature than that'of the convex portions of the remainder of the width of the strip and consequently to give the concave portions of the zone a smaller radius of curvature than that of the concave portions of the remainder of the width of the strip.
Owing to this arrangement, the corrugations of the two zones readily overlap one another, and the internal zone cannot penetrate below the external zone over a greater length than that of the latter, since its edge comes to abut on the narrows of the corrugations at the place where the external zone is connected to the remainder of the width of the strip. The strip, therefore, cannot be wound on a smaller diameter than that which results from these arrangements.
It has further been proposed to produce tubes by means of a strip having triangular-profile corrugations. The external and internal zones of such a strip are satisfactorily applied against one another but no abutment defines the winding diameter of the strip.
SUMMARY OF THE INVENTION constitute the tube, the corrugations of the internal zone overlap perfectly in the corrugations of the external zone, and the edge of the said internal zone comes to abut at the discontinuity in the corrugations at the end of the external zone, since at this region the corrugations which thus come opposite one another are offset relative to one another by the amount of half a corrugation.
BRlEFDESCRIPIlON-OFTHE DRAWINGS Theaccompanying drawing show by way of example a flexible tube according to the invention comprising triangular-section corrugations.
FIG. 1 is a perspective view of the corrugated strip before it is curved, and
FIG. 2 is a perspective view of a section of tube produced by means of this stri DESCRIPTIO OF THE PREFERRED EMBODIMENT In these Figures, A designates,- the external lateral edge of the'strip, B the internal lateral edge, and C the line of discontinuity in the corrugations. 1
Between the edge A and the line C, the corrugations are progressively oflset by half a corrugation, that is to say by onehalf, and the corrugations on either side of the line C are also offset by half a corrugation. As a result, when the strip is wound to the form of a cylinder (FIG. 2) the corrugations of the edge A are in register with the corrugations of the edge 8 and are placed exactly on these, until they come to abut on the discontinuities of the line C; therefore, the amount of overlap cannot exceed a length greater than the distance L between the lines B and C.
It will be apparent that the invention is independent of the nature of the material of which the strip is made, which may be for example a bimetallic material, and also of the means used for assembling the two overlapping zones, which may include for example welding or the use of an adhesive substance.
The invention has as its object to provide a flexible tube, the
structure of which is different from these known structures.
This tube which comprises undulations or corrugations of anydesired profile, is characterized in that, on the one hand,
the direction of the corrugations is inclined relative to the I What is claimed is:
l. A flexible metal tube comprising: a wound corrugated strip forming a cylinder, the direction of the corrugations being inclined relative to the transverse axis of the strip such that the pitch is equal to one-half the width of a corrugation,
the corrugations of the strip intermediate of its overlapped edges being abruptly laterally oflset a distance equal to the width of a half corrugation, such that the valleys of one portion of the corrugated tube to the side of the demarcation line formed by the offset, are in alignment with the apices of the tube portion to the other side of said demarcation line.
2. The flexible metal tube as claimed in claim I wherein the overlapping zones are connected by welding.
3. The flexible metal tube as claimed in claim 1 wherein the overlapping zones are connected by means of an adhesive substance.
\ 4. The flexible metal tube as claimed in claim 1 wherein the strip is of bimetallic material.
Claims (4)
1. A flexible metal tube comprising: a wound corrugated strip forming a cylinder, the direction of the corrugations being inclined relative to the transverse axis of the strip such that the pitch is equal to one-half the width of a corrugation, the corrugations of the strip intermediate of its overlapped edges being abruptly laterally offset a distance equal to the width of a half corrugation, such that the valleys of one portion of the corrugated tube to the side of the demarcation line formed by the offset, are in alignment with the apices of the tube portion to the other side of said demarcation line.
2. The flexible metal tube as claimed in claim 1 wherein the overlapping zones are connected by welding.
3. The flexible metal tube as claimed in claim 1 wherein the overlapping zones are connected by means of an adhesive substance.
4. The flexible metal tube as claimed in claim 1 wherein the strip is of bimetallic material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR6943940A FR2071132A5 (en) | 1969-12-18 | 1969-12-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3667506A true US3667506A (en) | 1972-06-06 |
Family
ID=9044794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US99205A Expired - Lifetime US3667506A (en) | 1969-12-18 | 1970-12-17 | Corrugated metal tube for an external conductor or sheath of an electric cable |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3667506A (en) |
| DE (1) | DE2062539A1 (en) |
| FR (1) | FR2071132A5 (en) |
| GB (1) | GB1279599A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3754094A (en) * | 1971-01-25 | 1973-08-21 | Kabel Metallwerke Ghh | Cable with welded corrugated metal sheath |
| US3987238A (en) * | 1973-11-23 | 1976-10-19 | Aeg-Elotherm G.M.B.H. | Electric conductor for the conduction of electric currents of high density under heated conditions of the conducting body |
| WO2002029258A2 (en) * | 2000-10-06 | 2002-04-11 | Ziv Av Amir | Variable pitch thread configuration |
| US6459836B1 (en) * | 1999-12-16 | 2002-10-01 | Avaya Technology Corp. | Corrugated armor for providing protection and tensile stiffness |
| EP2605250A1 (en) * | 2011-12-12 | 2013-06-19 | Unison Industries LLC | Ignition lead |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2335248B (en) * | 1998-03-07 | 2002-12-31 | Crp Group Ltd | Protection of underwater elongate members |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US971400A (en) * | 1908-02-03 | 1910-09-27 | Joseph Ralph Orwig | Corrugated metal culvert. |
| US1652703A (en) * | 1926-06-17 | 1927-12-13 | American Rolling Mill Co | Corrugated-metal culvert |
| US2606953A (en) * | 1946-09-23 | 1952-08-12 | Int Standard Electric Corp | High-frequency coaxial cable outer conductor |
-
1969
- 1969-12-18 FR FR6943940A patent/FR2071132A5/fr not_active Expired
-
1970
- 1970-12-11 GB GB59148/70A patent/GB1279599A/en not_active Expired
- 1970-12-17 US US99205A patent/US3667506A/en not_active Expired - Lifetime
- 1970-12-18 DE DE19702062539 patent/DE2062539A1/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US971400A (en) * | 1908-02-03 | 1910-09-27 | Joseph Ralph Orwig | Corrugated metal culvert. |
| US1652703A (en) * | 1926-06-17 | 1927-12-13 | American Rolling Mill Co | Corrugated-metal culvert |
| US2606953A (en) * | 1946-09-23 | 1952-08-12 | Int Standard Electric Corp | High-frequency coaxial cable outer conductor |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3754094A (en) * | 1971-01-25 | 1973-08-21 | Kabel Metallwerke Ghh | Cable with welded corrugated metal sheath |
| US3987238A (en) * | 1973-11-23 | 1976-10-19 | Aeg-Elotherm G.M.B.H. | Electric conductor for the conduction of electric currents of high density under heated conditions of the conducting body |
| US6459836B1 (en) * | 1999-12-16 | 2002-10-01 | Avaya Technology Corp. | Corrugated armor for providing protection and tensile stiffness |
| WO2002029258A2 (en) * | 2000-10-06 | 2002-04-11 | Ziv Av Amir | Variable pitch thread configuration |
| US6401758B1 (en) * | 2000-10-06 | 2002-06-11 | Amir Ziv-Av | Variable pitch thread configuration |
| WO2002029258A3 (en) * | 2000-10-06 | 2002-09-12 | Amir Ziv-Av | Variable pitch thread configuration |
| EP2605250A1 (en) * | 2011-12-12 | 2013-06-19 | Unison Industries LLC | Ignition lead |
| US8766095B2 (en) | 2011-12-12 | 2014-07-01 | Unison Industries, Llc | Ignition lead |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2062539A1 (en) | 1971-06-24 |
| GB1279599A (en) | 1972-06-28 |
| FR2071132A5 (en) | 1971-09-17 |
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