US2903843A - Method for the preparation of seized metal-stranded cable - Google Patents

Method for the preparation of seized metal-stranded cable Download PDF

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Publication number
US2903843A
US2903843A US687581A US68758157A US2903843A US 2903843 A US2903843 A US 2903843A US 687581 A US687581 A US 687581A US 68758157 A US68758157 A US 68758157A US 2903843 A US2903843 A US 2903843A
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United States
Prior art keywords
cable
wrapping
metal
seized
explosive
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
Application number
US687581A
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English (en)
Inventor
Roberts Carl Emerson
Swed James Pershing
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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
Priority to BE568032D priority Critical patent/BE568032A/xx
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to US687581A priority patent/US2903843A/en
Priority to GB15479/58A priority patent/GB842295A/en
Priority to FR1208480D priority patent/FR1208480A/fr
Application granted granted Critical
Publication of US2903843A publication Critical patent/US2903843A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B9/00—Binding or sealing ends, e.g. to prevent unravelling
    • 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
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/02—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with parts deformable to grip the cable or cables; Fastening means which engage a sleeve or the like fixed on the cable
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49927—Hollow body is axially joined cup or tube
    • Y10T29/49929—Joined to rod
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49927—Hollow body is axially joined cup or tube
    • Y10T29/49929—Joined to rod
    • Y10T29/49931—Joined to overlapping ends of plural rods
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0591—Cutting by direct application of fluent pressure to work

Definitions

  • the present invention relates to seized metal-stranded cable and to a method for the preparation of such cable. More particularly, the present invention relates to metalstranded cable having a portion thereof seized by explosive means.
  • Metal-stranded cable for example wire rope
  • the tape or wire is unsatisfactory when applied to larger-diameter cable, which must be cut with a hacksaw or the like, because during the cutting operation the sawing action pulls the tape or wire from the cable, and, thus, unraveling of the strands occurs and the unraveled strands catch in the saw teeth.
  • constriction of a metal sleeve about the cable provides an adequate seize, but this method has several inherent disadvantages.
  • the equipment required for this operation not only is very expensive but also is not suitable for field use.
  • the sleeve must he slipped over the end of the cable and down its length, sometimes down hundreds of feet of cable, to the section which is to be seized.
  • the thereby necessitated handling of hundreds of feet to cable is highly disadvantageous, and, moreover, in some cases, the end of the cable over which the sleeve must be passed is not available, e.g. when fittings are fastened to the ends. Furthermore, the presence of the sleeve increases the diameter of the seized portion of the cable, and in certain applications of the cable, such increase in diameter cannot be tolerated, e.g. when the cable has to be drawn through tubing or fixtures of inner diameter approximately equal to the normal diameter of the cable.
  • an object of the present invention is to provide seized metal-stranded cable prepared by a simple and inexpensive method.
  • Another object of the present invention is to provide seized metal-stranded cable and a method for the preparation thereof which method is suitable for use in the field.
  • a further object of the 2,903,843 Patented Sept. 15, 1959 present invention is to provide a convenient method of seizing metal-stranded cable which seized cable is suitable for use in all applications of metal-stranded cable.
  • the portion of the cable to be seized is surrounded by a wrapping of flexible metal sheeting, preferably 5-35 mils in thickness, the wrapping is substantially completely surrounded by a charge of a detonating explosive, and the explosive is initiated.
  • the thin metal provides suflicient holding strength to-permit the mechanical working, e.g. cutting, of the seized portion without the unraveling of the cable and yet the diameter of the cable in the region of the seize is not substantially altered.
  • Figure 1 represents a length of cable having a seized portion and Figure 2 represents the same cable severed at the seized portion.
  • Figure 3 represents one embodiment of the wrapping of the present invention
  • Figures 4-6 illustrate additional embodiments of the wrapping of the present invention.
  • 1 represents a strip of metal sheathing and 8 represents metal cable.
  • the strip of metal sheathing 1 hasbeen wrapped around cable 8 as indicated in Figure 1, and forced into the lay of cable 8 in accordance with the method of the present invention.
  • the cable 8 was then cut by means of a hacksaw through the portion covered by strip 1.
  • each case 1 indicates a strip of flexible metal sheeting, preferably 5-35 mils in thickness.
  • Figure 3 is shown an embodiment in which perforations indicated by 2 are formed in the sheeting.
  • 3 represents one end of the sheeting bent back or rolled to form a hook which interlocks with the oppositely directed hook 3A formed at the other end of the sheet by bending or rolling, both ends of the sheet preferably being cut diagonally prior to formation of the hooks.
  • FIG 5 4 indicates a series of parallel prongs cut into one end of the sheet '1, the prongs 4 interlocking with the corresponding slots formed in the other end of the sheet and indicated by 5.
  • one end of the sheet 1 is tapered to form a narrow projection 6 which interconnects with one of a series of slits 7 formed in the other end of the sheet.
  • Example 1 A strip of copper sheeting 17 mils in thickness and about 6 inches in length and 1 inch in width was perforated to give /a-inch holes, one every /2 inch, three rows of the holes being provided as shown in Figure 3.
  • the perforated strip was wrapped lengthwise around a l-inch-long section of %-inch-diameter steel cable, about 2 layers of the wrapping being formed.
  • a fii-inch-thick layer of neoprene was positioned around and over-lapped slightly the wrapping, and then a length QfSO-gr'ainerfoot PETN detonating cord (Primacord manufactured by the Ensign-Bickford'Co.) was Wrapped around the neoprene in a manner such that the cord substantially surrounded the neoprene (four turns of the cord).
  • An electric blasting cap was attached to one end of the cord and then was actuated. 'Ihe detonation of the cord re? sulted in the blowing apart of the rubber cushion and the forcing of the metal strip into the lay of the cable to give a good seize, the driving of the copper sheeting into the perforations providing additional gripping action.
  • Example 2 The procedure of Example 1 wasrepeated with the exception that the metal strip illustrated in Figure 6 was substituted for the perforated strip.
  • the slits in the strip were /2 inch long by /8 inch wide, and the tapered end of the strip 'was tucked into one of them. Again, a good seize was obtained.
  • Example 3 The ends of a strip of aluminum sheeting mils thick and 1 inch wide were diagonally cut at an angle of 45 to form parallel ends which were bent back into hooks as shown in Figure 4. Each hook was inch in width, and the over-all length of the resultant strip was about 3 inches.
  • the strip was wrapped lengthwise around a l-inch-long section of A-inch-diameter steel cable, and the books were interlocked and pressed flat, the wrapping fitting snugly around the cable.
  • a 25-inch length of explosive connecting cord containing 2 grains of PETN per foot of length was wrapped around the aluminum strip and was initiated by an electric blasting cap attached to one end of the cord. Upon detonation of the cord, a good seize was obtained, which was cut through by means of a hacksaw into 2 sections as shown in Figure 2.
  • Example 4 A strip of steel sheeting 15 mils in thickness, about 1 inch wide, and slightly over 4 inches in length was formed into the configuration shown in Figure 5. The strip was wrapped lengthwise around a one-inch-long section of lMz-inch-diameter steel cable, and the prongs were interconnected with the corresponding slots. The wrapping was substantially surrounded by 5.5-grain-per-foot PETN explosive connecting cord, which then was actuated by an electric blasting cap, and a good seize was obtained.
  • the loose ends of the strands protrude from the spliced section of the cable and frequently interfere with its use by snagging or catching onto other objects, for example, pulleys and the like.
  • the ends are held down and a smooth splice results.
  • the seizing method of the present invention is generally applicable for all types and sizes of metal-stranded cable.
  • the seizing of cable smaller than that of about inch in diameter is impractical because cable of such diameter can be cut readily when bound by a length of tape or by wire or even when unseized.
  • the explosive charge used in the method of the present invention is of the detonating type, the specific composition of the explosive not being critical.
  • the amount of the explosive used is dependent upon such variables as the diameter of the cable, the thickness of the wrapping, the material of the wrapping, and the strength and shattering action of the explosive composition.
  • the minimum amount of explosive which can be used is that amount which will propagate its detonation when spread over the surface of the wrapping.
  • the imposition of a layer of modifying material between the explosive charge and the wrapping as illustrated in Examples 1 and 2, is desirable, in order to modify the forces of the detonation and thereby prevent shattering of the wrapping.
  • the modifying material may be the exemplified rubber or one of a wide variety of yielding mate: rials including plastics, paper and fibers, among others.
  • the exact configuration of the explosive charge is not critical, the only requirement being that the charge substantially surround the wrapping. Because of their ready availability and ease of handling, the cord-type explosives were used in the experiments described in the examples. However, the use of other explosive configurations is equally feasible and within the scope of the present invention. For example, a sheet of PETN or RDX or the like could be substituted for the detonating cord of the examples, and equivalent results would be obtained.
  • the explosive connecting cord of Examples 3 and 4 which cord comprises a metal sheath containing 0.1 .to 10 grains of a high-velocity detonating explosive per foot of sheath length and is described in detail in a pending application, Serial No. 597,145, filed July 11, 1956, and now abandoned, by D. J. Andrew, R. W. Felch, and G. A. Noddin and assigned to the present assignee, to be highly satisfactory and, thus, its use constitutes a preferred embodiment of the invention.
  • the metal sheeting used as the wrapping preferably is 5 to 35 mils in thickness, since metal sheeting of such thiclcness is flexible enough to be wrapped easily around the cable and is strong enough that itwill not tear during this operation.
  • Suitable metals include copper, aluminum, steel, etc.
  • Plain metal sheeting of the desired width and length may be simply wrapped around the cable, one or more layers of the wrapping being provided, or, in some cases, metal strips provided with fastening means may be used. Such strips would include the configurations shown in Figures 4-6 and, obviously, other variations. The strips also may be perforated, if desired.
  • the exact form of wrapping used, of course, is not critical.
  • the provision of more than one layer of the sheeting may be desirable, and, as is evident, the wrapping chosen in these cases should be such that the additional layers will not interfere with any fastening means which may be provided.
  • its width preferably is at least one-half inch, inasmuch as the cutting of narrower seized sections of the cable is impractical.
  • a method of preparing seized metal-stranded cable which comprises wrapping flexible thin metal sheeting around the section of the cable to be seized, substantially surrounding said wrapping with a charge of detonating explosive, and initiating said explosive.
  • a method of preparing seized metal-stranded cable which comprises wrapping flexible metal sheeting 5-35 mils in thickness around the section of the cable to be seized, substantially surrounding said Wrapping with a charge of detonating explosive, and initiating said explosive.
  • a method according to claim 2 wherein a layer of modifying material is provided between the wrapping and the explosive charge, said material modifying the forces generated by the detonation of the explosive.
  • each end of the wrapping is rolled to form a hook-like member, said members being oppositely directed and interlocking.
  • one end of the wrapping is tapered, said tapered portion of the wrapping interconnecting With one of a series of slits formed in the other end of the wrapping, said slits being perpendicular to the longitudinal axis of the wrapping.
  • a method of preparing seized metal-stranded cable which comprises wrapping flexible metal sheeting 5-35 mils in thickness around the section of the cable to be seized, said metal sheeting being selected from the group consisting of aluminum, copper, and steel sheeting, substantially surrounding said wrapping with a charge of detonating explosive, and initiating said explosive.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Cable Accessories (AREA)
US687581A 1957-10-01 1957-10-01 Method for the preparation of seized metal-stranded cable Expired - Lifetime US2903843A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE568032D BE568032A (enrdf_load_stackoverflow) 1957-10-01
US687581A US2903843A (en) 1957-10-01 1957-10-01 Method for the preparation of seized metal-stranded cable
GB15479/58A GB842295A (en) 1957-10-01 1958-05-14 Improvements in the seizing of metal-stranded cables
FR1208480D FR1208480A (fr) 1957-10-01 1958-06-13 Perfectionnements à la surliure de câbles à torons métalliques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US687581A US2903843A (en) 1957-10-01 1957-10-01 Method for the preparation of seized metal-stranded cable

Publications (1)

Publication Number Publication Date
US2903843A true US2903843A (en) 1959-09-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
US687581A Expired - Lifetime US2903843A (en) 1957-10-01 1957-10-01 Method for the preparation of seized metal-stranded cable

Country Status (4)

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US (1) US2903843A (enrdf_load_stackoverflow)
BE (1) BE568032A (enrdf_load_stackoverflow)
FR (1) FR1208480A (enrdf_load_stackoverflow)
GB (1) GB842295A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3141236A (en) * 1960-06-01 1964-07-21 Gen Dynamics Corp Method of cladding
US3172947A (en) * 1960-10-27 1965-03-09 Hollow core cable
DE3532070A1 (de) * 1985-09-09 1987-03-26 Bwz Berg Ind Tech Gebirgsanker, insbesondere fuer den bergbau

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0474910B2 (de) * 1990-09-14 1995-06-28 Brugg Drahtseil AG Kreuzklemme sowie Drahtseilnetz mit Kreuzklemmen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1769001A (en) * 1928-04-04 1930-07-01 Wendelin D Starrett Cable cutter
US2415814A (en) * 1943-11-15 1947-02-18 Du Pont Cable cutting method and device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1769001A (en) * 1928-04-04 1930-07-01 Wendelin D Starrett Cable cutter
US2415814A (en) * 1943-11-15 1947-02-18 Du Pont Cable cutting method and device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3141236A (en) * 1960-06-01 1964-07-21 Gen Dynamics Corp Method of cladding
US3172947A (en) * 1960-10-27 1965-03-09 Hollow core cable
DE3532070A1 (de) * 1985-09-09 1987-03-26 Bwz Berg Ind Tech Gebirgsanker, insbesondere fuer den bergbau

Also Published As

Publication number Publication date
BE568032A (enrdf_load_stackoverflow) 1900-01-01
GB842295A (en) 1960-07-27
FR1208480A (fr) 1960-02-24

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