USRE9989E - And boston - Google Patents

Description

H. A; CLARK,

Assignor; to THE CLARK INSULATED WIRE COMPANY. v

MANUFACTURE OF GOVBREDWIRE FORINSULATED GABLES. No. 9,989. Reissu'ed Dec 27 ,1881.

Wzfiesses, Iuvezz/ar UNITED STATES PATENT OFFICE.

Hussy A. CLARK, or BOSTON, MASSACHUSETTS, ASSIGNOR TOTHE CLARK INSULATED WIRE COMPANY, OF

ELIZABETH, NEW JERSEY, BRISTOL,

MANUFACTURE or COVERED WIRE FDR INSULATED 'cAaLts.

SPECIFICATION forming part of Reissued Letters Patent No. 9,989, dated December 27, 1881. Original No. 342,885, dated June 14, 1881. Application for reissue filed NovemherBO, 1881.

DlvisroaB.

To all whom it may concern:

Be it known that I, HENRY A. CLARK, of Boston, in the county of sufl'olk and State of Massachusetts, have invented certain new and useful Im provementsin Machines i'or'Govering Wire with Insulating Material, of which the following is a full, clear, and exact description.

r This invention relates to the manufacture of covered wire for insulated com-pound electrical conductors or cables for telegraphic or telephonic purposes, and has for its object to producea com pound conductor or cable which will be perfect in insulation and eflicient and re liable in use, and, furthcntosnroridean hu such compound proved method of producing conductors or cables.

To these ends my invention consists in forming a compound electrical conductor or cable by forcing, pressing, compacting,'or molding around and between a series of wires arranged from each other by the intervening portions of the insulating mass.-

In the drawings, Figure 1 represents a central longitudinal sectional view of a machine or apparatus invented by me for carrying out my method of manufacturing compound electrical conductors or cables. Figs. 2, 3, and 4 are transverse sections on the lines 2 2, 3 3, and 4 4 respectively of Fig. ,1. Fig. 5 is a crosssection of a compound electrical conductor or cable constructed in accordance with my invention. 4 v

In the drawings, Arepresents a chambered cylinder; B, a screw or worm arranged'to turn within said cylinder; 0, a hole which opens to the said screw intermediate. of its length; D,

the guide for the series of wires a, shown as 0 running at right angles to the length of the screw'B and cylinder A and between the inner end of the screw and the closed head ot'the cylinder; E,"the die orhead-block, havingan opening, F, through it, which axially is coincident with the axiallin'e of the wiregnide D. All of these parts above described are constructed and arranged for the passage of a wire through 1 the wire-gnide D into the die-opening F,'and at the same time for the forc'ng of'the insulat-- 6o ing material underpressure in a plastic state through the die-opening as the wire passes through. the same.

The wire-guide D is provided with a series of guideways or tubes, b, which run in parallel lines, and, as shown, in the present instance they are seven in number, arranged one at and along the axial line of the guide, and the remainder in a circle about such central guide, and at equal distances apart. Each of these several guide-tubes. is adapted'for the l'ree pas sage of a wire, and at the end 0 of the guide which is toward the-die-opening F they each. project and extend from the body portion d of the guide in parallel lines into the die-opening, and therein are separate and distinct from each other, so as to leave ai'ree and open space between each of them and between them all and the wall o fthe die-opening F, which, of course,

series of wire-guide tubes and leave a space between them and the wall 'of the die-opening, as stated. I

With a Series'of wire-guides, I), constructed and arranged in relation to each other and to 85 the die-openings above described, obviously the material with which the several wires are to be insulated or coated, and in conjunction with which they are to pass through the dieabout the wire-guides b before reaching the wires which are issuing from the wire-guides at their open ends toward andwit-hin the dieopening, and as a consequence the insulating. material in a plastic state is t'orced,-pre ssed, 5 compacted, or molded in a continuous mass about and between the series of wires as they issue from their several guide-tubes and beis made ofsufficient diameter to admit the said opening, is forced around and circulates'itselfi 0' tween thewires and the wall of thedie-op e ning, thereby securing a disposition'or molding of the insulating material under pressure about;

and around. the several wires, which material, so disposed, is in a homogeneous and-in one and the same mass throughout. A separation of the wii'e-giii1les,-as above described, before the wires issue from them and come into contact with the coating material being forced through the die opening, and thus secure the disposition of the coating material relative thereon, as above described, is absolutely essential, as otherwise the wires, from the'pressnrcof the coating materia-hwould be forced to gethe'r, and thus the proper disposition of the coating material between and around and about them prevented. g

Although I have scribed the wire-guides as seven in number and arranged in a particular relation, it is plain.v that their number may be more or less and -theirri-lativearrangement varied,and therefore itis notintended to limitthis invention to any particular number or toanyparticnlar relative arrangement of them,except that there is to be a series of wires, and practice has shown that seven wires can be simultaneously coated and coveredwith success, as described.

A compound wire orcable made as described is vulcanized, in order to preserve the disposition of the wires and of the insulating material speelficd, and also the proper form of the whole against derangement, and should 'be wrapped with'cloth or other similar sheet ma terial before vulcanizingit but this obviously has no bearing upon my invention.

The wire-guide D, in lieu of being arranged at right angles to the line of direction of the screw or worm B-and the chambered cylinder A, maybe arranged in an axial line coincident with the axial line of the screw.

In Fig. 5, a are the wires, audfthe coating or covering. v 4

The material composing the insulating subv herein particularly de stance, which is forced, presscd,or compacted aboutand between the series of wires into one b and the same homogeneous mass, consists of indie-rubber, guttapercha, or restored waste india-rubber or gutta-percha, in any oftheir vulcanizable or other compounds; and whichever .insnlating material is employed, it is introduced into thccylinder through the opening hcreinbefore described, to be therein pressed or molded around and between the series of wires.

Having thus described myinveution, what I claim, and desire to secure by Letters Patent, rs-

1. The method of making compound electrical conductors or tables which consists in forcing, pressing, or compacting arounda'series of substantially parallel spaced orseparated-wires an insulating material'ina plastic state, and afterward vulcanizing the same,

whereby the series of wires are surrounded by or embedded in one and the same homogeneous mass, and; are therein spaced or separated from each other,.substantially as described.

2. The method of making cylindrical com-' pound electrical conductors which consistsin forcing, pressing, or compacting around and between a series of. substantially parallel wires an insulating material 'in:a plastic state, and

afterward v'ulcanizing the homogeneous mass, substantiallyas described.

3. Acompound conductor or cable'composcd of a series of wires surrounded by or embedded in a mass of pressed or molded insulating material,"and therein spaced. (xx-separated from each other bythe intervening portions of the homogeneous mass, substantially as described.-

In testimony whereof I have-hereunto set my hand in the presenceof the subscribing wit- HENRY A. CLARK.

Witnesses ALBERT H..No1mrs, J AMES A. RUTHERFORD.

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