US1415156A - Method or art of making insulated wire - Google Patents

Description

W. E. COOK. METHOD 0R ART OF MAKING INSULATED WIRE.

APPLICATION FILED APRA24| I917- Patented May 9, 1922.

'f/zm I WILLIAM E (100E, OENEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE PEERLESS INSULATED WIRE AND CABLE COMPANY, OF NEW YORK, N. Y., A COR- PORATION OF DELAWARE emme.

Specification of Letters Patent.

METHOD 0R ART OF MAKING INSULATED WIRE.

Patented May 9, 1922.

To all whom it may concern:

Be it known that I, WILLIAM E. COOK, a subject of the King of the United Kingdom of reat Britain and Ireland, residing at St. George, in the borough of Richmond, city of New York, county of Richmond, and State of New York, have invented certain new and useful Improvements in the Method or Art of Making Insulated Wire, of which the following is a specification, reference being had therein to the accompanying drawings, which form a part thereof.

My invention relates to a method or art of making insulated wire, and more particularly to improvements in producing wire having an insulation consisting of ,an absorbent body saturated or impregnated with asphaltum or other composition for waterproofing, and increasing the resistance of the coating material.

In a co-pending application of mine, Serial No. 164,302, I have described a method or art which consists in spirally wrapping a cotton sliver about a wire coated with adhesive, and confining the sliver, in compressed condition, upon the wire by wrapping binding threads or cords about the compacted sliver prior to the saturation or impregnation of the sliver and the binding material, with an asphaltumior other composition. In this method or art, the binding threads or cords are wrapped about the sliver I in a spiral, the pitch of which is coincident with that at which the sliver is wrapped about the wire. wire constructed in this manner is highly satisfactory, nevertheless there is a possibility that as the result of the exhaustion of the adhesive bond between the sliver and the wire, or throughout the sliver, the sliver might unwind, and the binding threads or cords, being wound spirally about it at the same pitch, would necessarily unwind with it.

By my present invention, I avoida possibility of this condition arising by spirally winding the binding thread or cord about the cotton sliver at a higher pitch than that at which said sliver is wound and in a reverse direction, thus causing each convolution of said binding thread or cord to cross the lap of two or more succeedin convolutions of said cotton sliver according to the pitch at which the binder is moved, in a manner to not only prevent the sliver and While I have found that a the threador cord being simultaneously unwound, but to minimize any tendency of the sliver to begin to unwind while the wire is being handled during its installation.

By the method or art of my present invention, the covering braid for the wire is entirely dispensed with, and the covered wire is produced by a substantially simultaneous, or continuous operation;

The invention consists primarily in the herein described method or art of making insulated wire consisting of winding a cotton sliver spirally about a conductor wire with the edges thereof overlapping, compacting said sliver upon the wire, spirally winding a strand of flexible absorbent material about and embedding successive convolutions therethe completed-wire is waterproofed and the fibers of said sliver and said strand are bonded together; and in such other novel steps and practices as are hereinafter set forth and described, and more particularly pointed out in the claims hereto appended.

Referring to the drawings,

Fig. 1. is a side elevation .of a machine showing the manner. of applying the cotton sliger and the binding to a conductor wire; an

Fig. 2 illustrates an apparatus used in the step of saturating or impregnating the covering for the wire with asphaltum' or other viscous composition.

Like letters refer to like parts in both views.

In the practice of the method or art of my invention, a continuous strand of a conductor wire a is passed through a bath of ad hesive material indicated at b and has imparted thereto continuous traverse at a substantially uniform speed, being passed over the rollers c to a rewinding reel (not shown). During this traverse a continuous strip of cotton sliver d is spirally wound about the conductor wire a, the edges of succeeding convolutions forming a lap joint so as to secure continuity of this cover and substantially the same thickness thereof throughout.

' This sliver is applied by means of a rotating platform g adapted to carry a container f for the sliver, the wire a passing verticaliy horn 9, it passes through a rotating frame 6 through this platform, axially thereof. After the application of the sliver to the -w1re, the wire with the sliver thereon passes through a compressing horn ,9 having r0- tary movement with the platform e. Immediately as the wire and the partially compacted covering therefor, passes from the is continuously rotated so as to wind said thread, orcord spirally about the cotton sliver. -This thread or cord is subjected to and finishing irons 5 5 2 tensioning stresses in any desired manner,

so as to causeit to tightly embrace the cotton sliver and be firmly imbedded the-rein.

By applying the confining thread or cord immediately following the final compression of the cotton sliver, the desired density of the covering material is secured.

Preferably a plurality of independent parallel strands .are used, to permit the use of a fairly wide sliver confined at a number of different-pointsby the thread or, cord.

In order to cause the strand of thread or cord to be wound spirally upon the compressed or compacted sliver, as desired, the. frame i is rotated in a direction opposite to thatin which the platform 6 is rotated, and at lower speed so as to have the itch of the thread or cord, greater than t at of the sliver. In this manner the number of convolutions of the thread or cord per foot will be less than those of the sliver, and a plurality-of convolutions of said thread or cord will cross the lap between two or more suc-. ceeding convolutidns; of the said sliver, according to the'pitch at which the binding thread or cord is wound.

After the cotton sliver, has been applied to the wire, and confined in position by the spirall wound strand, or strands of thread or cor the wire with its covering is passed through a tank is containing a mass of viscous, insulating, adhesive and waterproof material, such as the asphaltum composition ordinarily used in making insulating wires. The wire after the setting of this composition is waxed and passed through polishing giving the desired, and final finish therein.

By reason of the application of adhesive to the wire before wrapping the sliver spirally thereupon, this sliver will he firmly bonded to the wire soas to resist displacement by the compression horns even though these horns do not have rotary movement.

While the covered wire is in the asphaltum or other similar bath, the cottonsliver will readily absorb this composition by reason of the fact that substantial "areas of the cotton sliver project between the strands of thread The compression of the sliver will matthe fibers thereof, the thread or cord preventing expansion aftercompression"; and

the application of the asphaltum or, other composition causes the fibers to firmly adhere or set, and at thesame time firmly bonds .i

the thread or cord to the sliver. Tn the finished, product the binding threads or cords will not be perceptible as the cotton sliver will ordinarily lap. thereover in a manner to completely conceal same.

Preferably, to permit the operation of 1 the machine used at high speed, I employ a cotton sliver having imbedded therein and bonded thereto, a-continuous cotton thread or cord which will serveto supplement the action of the" binding threads or cords ap plied to the exteriorof the sliver, in holding the sliver in its compacted condition upon the wire. I

stantially simultaneous, or continuous opera- .tion to apply both .the cotton sliver and the binding thread or cord to the wire thereby gainin the advanta e over the present In this manner, Iam enabled by a sub-' metho s of avoiding t e necessity for passing the wires successively through a machine for wrapping the sliver about the wire, and a machine for applying the cover thereto.

Having described the invention what I claim as new and desire tohave protected by Letters Patent is:

1. The herein described method or art of making insulated wire consisting in winding a cotton sliver spirally about a conductor wire with the edges thereof overlappin volutions thereof within said sliver while it compacting said sliver upon the wire, win

no I

is compacted, said strand being wound in a ing convolutions of said strands to facilitate the penetration of a viscous composition throughout the entire body of said sliver, and thereafter saturating or impregnating said sliver and said strand with a viscous composition whereby the. insulating property is increased, the completed wire is waterproofed, and the fibers of said sliver and I said strand are bonded together.

2. The herein described method or art of making .insulated wire consisting in wind inga cotton sliver spirally about a conductor n inmate ing a plurality of strands of flexible, ab-

sorbent material spirally about and embedding successive convolutions thereof within said sliver while it is compacted, said strands being laid in parallel lanes and being wound about said sliver in a direction the reverse of that at which said sliver is wound, and at a higher pitch than that at which said sliver is wound, with succeeding convolutions thereof spaced apart, whereby said strands will cross the lap between succeedin convolutions of said sliver, and ducts w' be formed between succeeding convolutions of said strands to facilitate the penetration of a viscous composition throughout the entire body of said sliver, and thereafter satu rating or impregnating said sliver and said strands with a viscous composition whereby the insulating property is increased, the completed wire is waterproofed, and the fibers of said sliver and said strands are bonded together.

3. The herein described method or art of making insulated wire consisting in winding a cotton sliver spirally about aconductor wire with the edges thereof overlapping, compacting said sliver upon the w a plurality of strands of flemible, absorbent material spirally about said sliver while it is compacted, said strands laid parallel planes and being wound about said sliver in a direction'the reverse of that at which said sliver is wound, and at ahigher pitch than that at which said sliver is wound, with succeeding convolutions thereof spaced apart, whereby said strands will cross the lap between succeeding convolutions of said sliver, and ducts wil be formed between succeeding convolutions of said strands to facilitate the penetration of a viscous composition throughout the entire body of said sliver, tensioning said strands while they are being wound to embed them in the sliver, and thereafter saturating or impregnating said sliver and said strands with a viscous composition whereby the insulating property is increased, the completed wire is waterproofed, and the fibers of said sliver and said strands are bonded together.

In witness whereof, I hereunto afix my ature in the resence of two subscribing WItIIQSSBS, this 9t day r April 1917.

' t. neon.

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