GB798934A - Improvements relating to metal sheathed cores - Google Patents
Improvements relating to metal sheathed coresInfo
- Publication number
- GB798934A GB798934A GB31077/54A GB3107754A GB798934A GB 798934 A GB798934 A GB 798934A GB 31077/54 A GB31077/54 A GB 31077/54A GB 3107754 A GB3107754 A GB 3107754A GB 798934 A GB798934 A GB 798934A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cable
- sheath
- rollers
- seam
- roller
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K13/00—Welding by high-frequency current heating
- B23K13/01—Welding by high-frequency current heating by induction heating
- B23K13/02—Seam welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Conductors (AREA)
Abstract
798,934. Making electric conductors; bending; welding. CRAWFORD, T. J. Dec. 22, 1954 [April 20, 1954], No. 37077/54. Classes 83 (2) and 83 (4). [Also in Groups XXVIII and XXXVI] An elongated metal sheathed solid or hollow core assembly comprises a tubular metal sheath closely fitting a core and having a longitudinally extending butt-welded seam of interfused metal, the circumferential width of the seam being less than the tube wall thickness. In sheathing a cable C, a roller 13 grooved to accommodate the cable and a co-operating roller 12 advance a flat strip S of aluminium, copper, zinc, magnesium or lead with the cable centrally thereon between guides 7-10, past scarfing tools 4, 5 which clean the strip edges and beneath a grooved felt wiper W to clean the strip. The strip is formed about the cable by rollers, idle rollers 31, 32, to seat on the cable being provided over the first forming rollers 27-30. Insulating tape, e.g. of fibrous paper with or without an adhesive coating, glass fibre, &c., is introduced from a reel 81 into the sheath in front of the rollers 46, 47 above which a vertically adjustable finned roller 59 is arranged which enters the open sheath seam. Similar rollers 58, 60 above rollers 48-51 but with narrower fins also enter the seam, the fin of the roller 60 slightly compressing the cable. The cable recovers as the sheath approaches squeeze rollers 66, 67, 68, a seam guide 64 positioning the seam and spacing the edges before passage through a water-cooled induction coil 77 supplied with high-frequency current e.g. of 9600-500,000 cycles per second or higher. The inductor brings the edges to welding temperature in the manner described in Specification 732,780. The weld point is beyond the effective limit of the induction field and at this point the cable has recovered to fill the sheath and form a low and smooth internal weld bead on the sheath. The width of the welded seam may be less than 20 per cent of the sheath wall thickness. A scarfing tool 69 trims the external weld bead and two final roller sets 74-77 slightly reduce the welded sheath. The squeezing rolls 66-68 may be replaced by rolls including a small roll 89, Fig. 14, of ceramic or conductive material bearing, on the upper side of the sheath and having a groove 90 to receive the external weld bead. The cable may be formed of copper strands individually paper insulated, the entire cable being wrapped with insulating paper or a three-way conductor cable formed by three cables twisted together in a long helix, each cable comprising individually paper insulated copper strands 78, Fig. 8, enclosed in a copper foil shield may form the core. Strands of yarn 86 fill the space between the cables. Two, four, five, &c., cables may be used. Instead of a cable the core may be a bundle of small copper or steel tubes, e.g. hydraulic or pneumatic conduit, clusters of concentric cables, a rubber tube, a plastic tube, e.g. of silicone rubber, neoprene, polyvinyl chloride, cellulose esters or nylon or hard facing alloys for arc welding electrodes. Steel, stainless steel, brass, silicon, bonze, &c., may be employed for the sheath material.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US798934XA | 1954-04-20 | 1954-04-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB798934A true GB798934A (en) | 1958-07-30 |
Family
ID=22153476
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB31077/54A Expired GB798934A (en) | 1954-04-20 | 1954-12-22 | Improvements relating to metal sheathed cores |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE536295A (en) |
GB (1) | GB798934A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO338572B1 (en) * | 2013-08-28 | 2016-09-05 | Nexans | Apparatus and method for enclosing a cable with a sheath |
-
0
- BE BE536295D patent/BE536295A/xx unknown
-
1954
- 1954-12-22 GB GB31077/54A patent/GB798934A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO338572B1 (en) * | 2013-08-28 | 2016-09-05 | Nexans | Apparatus and method for enclosing a cable with a sheath |
Also Published As
Publication number | Publication date |
---|---|
BE536295A (en) |
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