US2718990A - Electrical cable manufacture - Google Patents

Electrical cable manufacture Download PDF

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Publication number
US2718990A
US2718990A US236036A US23603651A US2718990A US 2718990 A US2718990 A US 2718990A US 236036 A US236036 A US 236036A US 23603651 A US23603651 A US 23603651A US 2718990 A US2718990 A US 2718990A
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US
United States
Prior art keywords
cable
weights
insulating material
conductor
sheath
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
US236036A
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English (en)
Inventor
Douchet Florimond Aristi Jules
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.)
Alsacienne de Constructions Mecaniques SA
Pyrotenax Ltd
Original Assignee
Alsacienne de Constructions Mecaniques SA
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 Alsacienne de Constructions Mecaniques SA filed Critical Alsacienne de Constructions Mecaniques SA
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Publication of US2718990A publication Critical patent/US2718990A/en
Anticipated expiration legal-status Critical
Assigned to PYROTENAX LIMITED reassignment PYROTENAX LIMITED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PRECISION MECANIQUE LABINAL, SOCIETE ALSACIENNE CONSTRUCTIONS MECANIQUES
Expired - Lifetime legal-status Critical Current

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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
    • H01B7/16—Rigid-tube cables

Definitions

  • the pulverulent nature of the insulators used in these cables leads to the placing of the assembly of conductors and the insulating material within a tubular metallic sheath 7 which can, if desired, also be used for conducting electric current.
  • Methods are known for packing the powdered insulating material, These methods include dehydrating-the powdered material and introducing'it into the top of a vertical sheath by joltings or repeated falls of a weight which is .subj'ectedito vertical reciprocation and which conforms to is ensured by jolts which are preferably of high frequency and whichare impressed upon the assembly formed by the sheath, the conductors and the insulating material by a vibrator, and in which a heavy mass is applied to the upper part of theinsulating material.
  • the heavy weight includes a number of weights subjected to a vertical reciprocation, bearing on the insulating material and suspendedfrom one of thever- .ticalf runs of a cable the other vertical run of which supports acountcrweight in such a way as to exert on the insulating material a pressure which is practically constant whatever may be the height of the insulating material with in the sheath and to maintain the weights continuously in bearing contact with the insulating material.
  • Figure his a diagrammatic longitudinal cross-sectional view of a device constructed'in accordance with the present invention.
  • Figure 2 is a sectional view taken on the line IIII of Figure Z1;
  • Figure 3 is a sectional view similar to that of Figure 2 for a cable having two inner conductors.
  • a work-piece is formed of a metallic sheath 1 and an inner conducting wire 2 which is disposed and maintained along the axis of the sheath 1.
  • the work-piece 1, 2 is mounted on a vibrator 3 having a frequency-of, for example, 50 cycles per. second, which is shown diagrammatically as a rotor 4 with an-outof-ba'lanceportion 5 and which rests on springs 6 on the ground.
  • the mineral insulating material 7 is fed through the top of the sheath -1 by means of a distributor 8.
  • Two weights 9 the vertical median section of which has the shape of a triangle, the lower oblique side of which has a slope preferably substantially equal'to the natural conductor 2.
  • the weights 9 are attached by rods 10, shapedas circular arcs in order to give them more resistance to-bending, to a balance beam 11 at two :points 13 equidistant from the center of oscillation 12 of the balance beam 11. Oscillatory movement is impressed upon-'the'latter'by a transmission represented diagrammaticallyby a connecting rod 14 attached to an eccentric point in a disc 15mttating about its axis.
  • the assembly consisting of weights 9, rods 10, balance beam 11 and driving mechanism 14 and 15, is suspended from a cable 16 whichpassesover pulleys 17.
  • the cable :16 supports, at the end of its other vertical run, a counterweight 18.
  • the described device operates as follows:
  • the insulating material is consolidated by the action of the vibrator 3.
  • the weight 9 under consideration has completed .its upward stroke, it has a sufficiently good support beneath it for the preceding reasoning to be again applicable.
  • the assembly 9, 10, 11, 14 and 15, therefore'rises gradually, constantly bearing on the compact block of powder which forms progressively beneath it.
  • the degree of compactness is determined by the reactions of the weights 9 and, therefore, by the mass of the latter, and by the thrust of the assembly 9, 10, 11, 14, 15 which is regulated by the counterweight 18.
  • the assembly of the weights 9 can also be given a rotary movement about the vertical axis formed by the conductor 2.
  • the apparatus can be used for cables having several inner conductors 2 by simple modification of the section of the weights 3, as can be seen in Figure 3.
  • the invention covers also the use, with or without a jolting device, of a number of weights capable of being displaced one relatively to the other, so as to leave between them at least at-certain instants a space through which the insulating material can .pass beneath the weights.
  • An apparatus for consolidating powderedinsulating material in an electric cable having an external sheath and at least one conductor to be separated from said sheath by said insulating material comprising, in combination, means for supporting vertically the cable, said supporting means making contact with said cable at the lowermost cross-section thereof; means for imparting vibrations to said supporting means and said cable supported by the same; two weights of triangular cross section adapted to be arranged in said cable alongside each other on opposite sides of said conductor so as to act on separate portions of said powdered insulating material filling said cable; and means for imparting to said weights, respectively, alternative motions out of phase with one another, whereby one of said weights compresses said powdered insulating material in said cable while the other of said weights is ineffective, and vice versa, the lower faces of said weights forming an acute angle with said conductor, the tips of the faces of said weights adjacent said cable being lower than the tips of said weights adjacent said conductor.
  • An apparatus for consolidating powdered insulating material in an electric cable having an external sheath and at least one conductor to be separated from said sheath by said insulating material comprising, in combination, means for supporting vertically the cable, said supporting means making contact with said cable at the lowermost cross-section thereof; means for imparting vibrations to said supporting means and said cable supported by the same; two weights of triangular cross section each having a lower face forming an acute angle with a horizontal plane, the tips of the faces of said weights adjacent said cable being lower than the tips of said weights adjacent said conductor, said weights being adapted to be arranged in said cable alongside each other on opposite sides of said conductor so as to act on separate portions of said powdered insulating material filling said cable; and means for imparting to said weights, respectively, alternative motions out of phase with one another, whereby one of said weights compresses said powdered insulating material in said cable while the other of said weights is ineffective, and vice versa.
  • An apparatus for consolidating powdered insulating material in an electric cable having an external sheath and at least one conductor to be separated from said sheath by said insulating material comprising, in combination, means for supporting vertically the cable, said supporting means making contact with said cable at the lowermost cross-section thereof; means for imparting vibrations to said supporting means and said cable supported by the same; two weights of triangular cross section adapted to be arranged in said cable alongside each other on opposite sides of said conductor so as to act on separate portions of said powdered insulating material filling said cable, each of said two weights having a lower face forming an acute angle with said conductor, the tips of the faces of said weights adjacent said cable being lower than the tips of said weights adjacent said conductor; two rods supporting said weights; and means for driving said rods, said driving means imparting to said rods, respectively, alternative motions out of phase with one another, whereby one of said weights compresses said powdered insulating material in said cable while the other of said weights
  • An apparatus for consolidating powdered insulating material in an electric cable having an external sheath and at least one conductor to be separated from said sheath by said insulating material comprising, in combination, means for supporting vertically the cable, said supporting means making contact with said cable at the 4 lowermost cross-section thereof; means for imparting vibrations to said supporting means and said cable supported by the same; two weights of triangular cross section adapted to be arranged in said cable alongside each other on opposite sides of said conductor so as to act on separate portions of said powdered insulating material filling said cable, each of said two weights having a lower face forming an acute angle with said conductor, the tips of the faces of said Weights adjacent said cable being lower than the tips of said weights adjacent said conductor; two rods supporting said weights; and means for driving said rods, said driving means imparting to said rods, respectively, alternative motions out of phase with one another, whereby one of said weights compresses said powdered insulating material in said cable while the other of said weight
  • An apparatus for consolidating powdered insulating material in an electric cable having an external sheath and at least one conductor to be separated from said sheath by said insulating material comprising, in combination, means for supporting vertically the cable, said supporting means making contact with said cable at the lowermost cross-section thereof; means for imparting vibrations to said supporting means and said cable supported by the same; two weights of triangular cross section adapted to be arranged in said cable alongside each other on opposite sides of said conductor so as to act on separate portions of said powdered insulating material filling said cable, each of said two weights having a lower face forming an acute angle with said conductor, the tips of the faces of said weights adjacent said cable being lower than the tips of said weights adjacent said conductor; means for imparting to said weights, respectively, alternative motions out of phase with one another, whereby one of said weights compresses said powdered insulating material in said cable while the other of said weights is ineffective, and vice versa; at least one pulley;
  • An apparatus for consolidating powdered insulating material in an electric cable having an external sheath and at least one conductor to be separated from said sheath by said insulating material comprising, in combination, means for supporting vertically the cable, said supporting means making contact with said cable at the lowermost cross-section thereof; means for imparting vibrations to said supporting means and said cable supported by the same; two weights of triangular cross section adapted to be arranged in said cable alongside each other on opposite sides of said conductor so as to act on separate portions of said powdered insulating material filling said cable, each of said two weights having a lower face forming an acute angle with said conductor, the tips of the faces of said weights adjacent said cable being lower than the tips of said weights adjacent said conductor; two rods supporting said weights; means for driving said rods, said driving means imparting to said rods, respectively, alternative motions out of phase with one another, whereby one of said weights compresses said powedered insulating material in said cable while the other of said weights

Landscapes

  • Manufacturing Of Electric Cables (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
US236036A 1950-07-21 1951-07-10 Electrical cable manufacture Expired - Lifetime US2718990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR876415X 1950-07-21

Publications (1)

Publication Number Publication Date
US2718990A true US2718990A (en) 1955-09-27

Family

ID=9360558

Family Applications (1)

Application Number Title Priority Date Filing Date
US236036A Expired - Lifetime US2718990A (en) 1950-07-21 1951-07-10 Electrical cable manufacture

Country Status (6)

Country Link
US (1) US2718990A (fr)
BE (1) BE504341A (fr)
DE (1) DE876415C (fr)
FR (1) FR1023387A (fr)
GB (1) GB693668A (fr)
LU (1) LU30842A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2867955A (en) * 1955-06-07 1959-01-13 Wiegand Co Edwin L Filling apparatus
US2998036A (en) * 1958-07-11 1961-08-29 South African Council Scientif Apparatus for packing powders into vessels having long narrow cavities, more especially cavity electrodes for spectrochemical analysis
US3433276A (en) * 1964-10-05 1969-03-18 Int Standard Electric Corp Carbon filling method and machine
US11871486B2 (en) 2017-02-01 2024-01-09 Nvent Services Gmbh Low smoke, zero halogen self-regulating heating cable

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US397411A (en) * 1889-02-05 Machine for packing flour
US720053A (en) * 1902-07-19 1903-02-10 Charles R Mckibben Mechanism for packing pipes with sand.
US1359400A (en) * 1920-06-22 1920-11-16 Cutler Hammer Mfg Co Electric heater
US1487683A (en) * 1923-10-22 1924-03-18 J F Elam Sales Service Inc Feeder and packer for pulverulent materials
US1618459A (en) * 1925-05-14 1927-02-22 J F Elam Sales Service Inc Machine for feeding and packing pulverulent material
US1897612A (en) * 1930-05-06 1933-02-14 Burgess Battery Co Tamping machine
US2319573A (en) * 1940-07-20 1943-05-18 Gen Electric Apparatus for loading sheath wire heating units
US2379230A (en) * 1940-12-12 1945-06-26 Nestle S Milk Products Inc Method for compacting and packaging milk powder and compacted mass of milk powder and the like
US2515323A (en) * 1947-01-23 1950-07-18 Hercules Powder Co Ltd Tamping machine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US397411A (en) * 1889-02-05 Machine for packing flour
US720053A (en) * 1902-07-19 1903-02-10 Charles R Mckibben Mechanism for packing pipes with sand.
US1359400A (en) * 1920-06-22 1920-11-16 Cutler Hammer Mfg Co Electric heater
US1487683A (en) * 1923-10-22 1924-03-18 J F Elam Sales Service Inc Feeder and packer for pulverulent materials
US1618459A (en) * 1925-05-14 1927-02-22 J F Elam Sales Service Inc Machine for feeding and packing pulverulent material
US1897612A (en) * 1930-05-06 1933-02-14 Burgess Battery Co Tamping machine
US2319573A (en) * 1940-07-20 1943-05-18 Gen Electric Apparatus for loading sheath wire heating units
US2379230A (en) * 1940-12-12 1945-06-26 Nestle S Milk Products Inc Method for compacting and packaging milk powder and compacted mass of milk powder and the like
US2515323A (en) * 1947-01-23 1950-07-18 Hercules Powder Co Ltd Tamping machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2867955A (en) * 1955-06-07 1959-01-13 Wiegand Co Edwin L Filling apparatus
US2998036A (en) * 1958-07-11 1961-08-29 South African Council Scientif Apparatus for packing powders into vessels having long narrow cavities, more especially cavity electrodes for spectrochemical analysis
US3433276A (en) * 1964-10-05 1969-03-18 Int Standard Electric Corp Carbon filling method and machine
US11871486B2 (en) 2017-02-01 2024-01-09 Nvent Services Gmbh Low smoke, zero halogen self-regulating heating cable
US11956865B2 (en) 2017-02-01 2024-04-09 Nvent Services Gmbh Low smoke, zero halogen self-regulating heating cable

Also Published As

Publication number Publication date
FR1023387A (fr) 1953-03-18
BE504341A (fr)
GB693668A (en) 1953-07-01
DE876415C (de) 1953-05-11
LU30842A1 (fr)

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