US327472A - Composite electric cable - Google Patents
Composite electric cable Download PDFInfo
- Publication number
- US327472A US327472A US327472DA US327472A US 327472 A US327472 A US 327472A US 327472D A US327472D A US 327472DA US 327472 A US327472 A US 327472A
- Authority
- US
- United States
- Prior art keywords
- strands
- insulated
- composite electric
- cable
- electric cable
- 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
- 239000002131 composite material Substances 0.000 title description 6
- 239000000203 mixture Substances 0.000 description 12
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 239000004020 conductor Substances 0.000 description 10
- 239000002184 metal Substances 0.000 description 6
- 239000002965 rope Substances 0.000 description 6
- 239000002966 varnish Substances 0.000 description 6
- 239000011888 foil Substances 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 230000001681 protective Effects 0.000 description 2
Images
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
- H01B7/22—Metal wires or tapes, e.g. made of steel
- H01B7/226—Helicoidally wound metal wires or tapes
Definitions
- It further comprises,however, the combination, with the twisted strands inclosed in one or more insulated metallic sheaths, of a layer or serving of twine and an armor composed of spirallywound strands of wire, which give the cable great tensile strength and protectit from abrasion.
- Figure 1 is a view of a portion of the cable with parts of each layer exposed.
- Fig. 2 is an enlarged view of one of the strands, and
- Fig. 3 is a view in elevation of the twisted rope composing the core.
- A designates the core composed of strands
- a spirally-wound layer of metal foil 1), a similarly-wound layer of paper, (I, a coating of resinous varnish, e, a layer of metal foil, f, a third layer of paper, 9, a coating of varnish, h, and a layer of paper, 70.
- a coat, Z of bituminous insulating material or some similar compound that is permanently viscous to a slight degree.
- twine m and around the twine, which serves to compact the cable I and forms an excellent foundation for the armor, strands a of fine wires are spirally wound. This completes the cable and gives it great strength and durability.
- ⁇ Vhat I claim is 1.
- the combination with a core composed of twisted sir-ands, each consisting of two insulated wires forming or adapted to form a complete or round wire circuit,of one or moreinsulated metallic sheaths, substantially as set forth.
- the combination with a core composed of twisted strands, each consisting of two insulated wires forming or adapted to form a complete or round wire circuit and twisted together, of one or more insulated metallic sheaths, substantially as set forth.
- each of which is made up of two wires, 0 c, inl with a core composed of twisted strands, each consisting of two insulated wires forming or adapted to form a complete or round wire cirenit, of one ormore insulated metallic sheaths and a protective armor, as set forth 4.
- a core composed of twisted strands each consisting of two insulated wires forming or adapted to form a complete or round wire circnit, of one or more insulated.
- metallic sheaths and an armor composed of spirally wound IO strands of wires all as set forth.
Landscapes
- Ropes Or Cables (AREA)
Description
(No ModeL) H. O. SPALDING.
COMPOSITE ELECTRIC CABLE.
No. 327,472. Patented Sept. 29, 1885.
WITNESSES INVENTUH fla UNITED STATES PATENT OFFICE.
HENRY C. SPALDING, OF BOSTON, MASSACHUSETTS.
COMPOSITE ELECTRIC CABLE.
SPECIFICATION forming part of Letters Patent No. 327,472, dated September 29, 1885.
Application filed December 7, 18P3. Renewed February 28, 1885. (No model.)
To all w/tom it may concern:
Be it known that I, HENRY C. SPALDING, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented a certain new and useful Composite Electric Cables, of which the following is a specification, reference being had to the drawings accompanying and forming a part of the same.
In another application 1 have shown and described an electrical cable containing two insulated conductors designed for the leading and return wires of a circuit and surrounded by a metallic sheath, which in its turn is insulated from the ground by an exterior coating ofinsulating material. The main purpose of this construction, as I have more fully explained in the application referred to, is to preventinduction and retardation, this being greatly facilitated by insulating the metal sheath in which an electrical equilibrium is produced by the current flowing in opposite directions in the two insulated conductors.
It is frequently desirable to construct cables in which provision is made for several circuits, and in this case I use as many pairs of insulated conductors as there are circuits; but to more perfectly neutralize or counteract the effect of one pair of these conductors upon one another and upon the sheath I twist them together and then twist the strands into a rope. In this way each conductor is brought into a great variety of juxtaposition to the others and to the insulated metallic sheath. In this my present invention mainly consists. It further comprises,however, the combination, with the twisted strands inclosed in one or more insulated metallic sheaths, of a layer or serving of twine and an armor composed of spirallywound strands of wire, which give the cable great tensile strength and protectit from abrasion.
I will describe my invention by reference to the accompanying drawings, in which Figure 1 is a view of a portion of the cable with parts of each layer exposed. Fig. 2 is an enlarged view of one of the strands, and Fig. 3 is a view in elevation of the twisted rope composing the core.
A designates the core composed of strands,
sulated,preferably,by spirally-wound strips of paper laid on a coating of resinous varnlsh and then twisted together, as shown in Flg. l. The required number of these strands are twisted together, as shown in Fig. 3, to form a round and compact rope. Around the core is wound a spiral strip or ribbon of fibrous material, a, such as paper, and over th1s is applied a coating of resinous varnish, 0. Then follow in order a spirally-wound layer of metal foil, 1), a similarly-wound layer of paper, (I, a coating of resinous varnish, e, a layer of metal foil, f, a third layer of paper, 9, a coating of varnish, h, and a layer of paper, 70. Over the latter is applied a coat, Z, of bituminous insulating material or some similar compound that is permanently viscous to a slight degree. Into this is wound the twine m, and around the twine, which serves to compact the cable I and forms an excellent foundation for the armor, strands a of fine wires are spirally wound. This completes the cable and gives it great strength and durability.
It may be stated that the materials used in the composition of this cable,and the manner of applying the same,may be considerably varied without departure from the invention. I have described, however, those which I have found to yield the most satisfactory results.
I do not claim, broadly, herein twisted wires nor twisted strands in an electrical cable; nor do I claim any of the insulating materials described, nor the manner of applying them, as these are matters that form the subject of other applications for patent.
\Vhat I claim is 1. In an electrical cable, the combination, with a core composed of twisted sir-ands, each consisting of two insulated wires forming or adapted to form a complete or round wire circuit,of one or moreinsulated metallic sheaths, substantially as set forth.
2. In an electrical cable, the combination, with a core composed of twisted strands, each consisting of two insulated wires forming or adapted to form a complete or round wire circuit and twisted together, of one or more insulated metallic sheaths, substantially as set forth.
3. In an electrical cable, the combination,
each of which is made up of two wires, 0 c, inl with a core composed of twisted strands, each consisting of two insulated wires forming or adapted to form a complete or round wire cirenit, of one ormore insulated metallic sheaths and a protective armor, as set forth 4. In an electrical cable, the combination, with a core composed of twisted strands, each consisting of two insulated wires forming or adapted to form a complete or round wire circnit, of one or more insulated. metallic sheaths and an armor composed of spirally wound IO strands of wires, all as set forth.
In witness whereof I have hereunto signed my name in the presence oli'the two subscribing witnesses.
HENRY G. SPALDING.
Vitnesses:
ALEX. L. l-Lufns, ll. 13. Union.
Publications (1)
Publication Number | Publication Date |
---|---|
US327472A true US327472A (en) | 1885-09-29 |
Family
ID=2396587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US327472D Expired - Lifetime US327472A (en) | Composite electric cable |
Country Status (1)
Country | Link |
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US (1) | US327472A (en) |
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0
- US US327472D patent/US327472A/en not_active Expired - Lifetime
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