US1908062A - Electric conductor - Google Patents

Description

y 1933. E. .J. SCHNEIDER 1,903,062

ELECTRIC CONDUCTOR Filed Nov. 6, 1931 H "W INVEN TOR.

fDIW/V f 5CH/Mf/Dffi ATTOR EY Patented May 9, 1933 UNITED STATES PATENT OFFICE v EDWIN SCHNEIDER, OF JAMAICA, NEW YORK Application filed November 6, 1831. Serial No. 573,384.

This invention relates to electric conducone form of cable illustrating one use of my tors of various kinds and classes, and'particuimproved protector sheath. larly to the provision of an insulated sheath Fig. 2 is a perspective view of the sheath or warp for insulating the conductor strands shown in Fig. 1, detached.

within an outer casing or jacket of any kind Fig. 3 is a view similar to Fig. 2 showing a or class; and the object of the invention is to modification. providea sheath or wrapper adapted to be Fig. 4 is a view similar to Fig. 2 showing folded or wrapped around the conductor another modification; and, strand or strands, and so formed as to permit Fig. 5 is a view smilar to Fg. 2 showing an- 'the longitudinal extension thereof so as to other form of sheath. w bring reinforced shield or bushing sections In conductors of various kinds and classes, constituting an integral part of said sheath it has been customary to provide protector or wrap in position to guard, protect and insheaths of various kinds and classes between sulate the conductor or conductors adjacent the conductor strands and an outer casing or the cut or severed end of the outer casing or jacket in what are known as armored conj acket; a further object of the'invention beductors, lead covered cables, as well as noning to provide a sheath or wrapper of the metallic sheathed conductors. My invention class described, wherein the shield or bushing consists in the provision of a'protector sheath sections are provided at predetermined or wrap so formed as to permit longitudinal spaced intervals throughout the entire length extension thereof so as to bring bushing or of the sheath with .intermediate folded, shielding sections arranged longitudinally of crinkled, or otherwise gathered sections or and as an integral part of the sheath into poareas, facilitatin the withdrawal of the sitions at the end portion of the cable so as sheath to permit't e positioning of a bushing to insulate the conductors adjacent the free 5 or shield section at the end of the outer casing end of the outer casing. 75 of the conductor; a further object being to For the purpose of illustrating one use of provide a protector sheath or wrap for conmy invention, I have illustrated in Fig. 1 of ductors of the class s ecified which will obthe drawing, what is known as an armored viate the necessity o using independently conductor consisting of an outer, flexible,

formed bushings or shields between the conmetallic casing 10 in which is arranged the dnctor strand or strands and the severed end conductor strand or strands 11. At 12, I of the outer casing or jacket; a still further have shown one form of my improved proobject being to characterize the bushing or tector sheath or wrap arranged on the conshield sections of the sheath to distinguish ductor or conductors 11 within the casing 10. them from the remainder of the sheath, facili- The sheath 12, in the construction shown in tating the location hereof at the end of the Figs. 1 and 2, is formed from a comparatively outer casing of the conductor; and with these wide strip of fibrous material such for examand other objects in view, the invention conple as paper, preferably treated with a comsists in a protector sheath or wrap for conpound to render the same fire and moistureductors of the class specified, which is simple proof. .The strip 12 is folded transversely in construction, efficient in use, and which is upon itself a number of times so as to form a constructed as hereinafter described and plurality of transverse or circumferential secclaimed. tions, each consisting of an upper layer 13, a The invention isfully disclosed in the follower layer 14 and an intermediate layer 15.

' lowing specification, of which the accom- Longitudinally spaced sections 16 are so panying drawin forms a part, in which the formed and treated as to provide what I term separate parts 0 my improvement are desigbushing or shielding sections which are nated by suitable reference characters in each spaced apart by a plurality of plain, extensiof the views, and in which ble sections 17, it being understood that the Fig. 1 is a side and sectional view through separate layers of the sections 16 are secured together in such manner as to prevent extension thereof which result may be accomplished b adhering the respective layers together as indicated at 18. It is also preferred that the sections 16 be characterized by a color, printed or otherwise applied thereto as indicated by the shading 19, or these sections may contain other printed matter or markings to designate them and distinguish them from the sections 17 so as to facilitate the positioning of said sections beneath the outer cut end 10a of the casing 10. One of the sections 16 is shown beneath said cut end in F 1 of the drawing.

y secu the separate layers of the sections 16 to er, these sections become relatively har rigid and strong and durable as will be apparent, and will serve to properly shield, protect and insulate the conductor or conductors at the cut end of the outer casing. In dealing with metallic casing, it is common to employ a saw to sever the end of the casing in e operation of cousling the protruding end or ends of the conuctors wlth an electric fixture of any kind or class.

With the use of my improved protector sheath or wrap, after the outer casing has been'cut in the manner referred to, the end of the wrap is pulled from beneath the casing 10 so as to bringthe next section 16 thereof to a position beneath the cut end 10a of the casing as seen in Fig. 1. This result is accomplished by the extensibility of the sections 17, and it will be noted in Fig. 1 of the drawing, that one of the sections 17 between two of the sections 16, has been fully extended to properly position a section 16 beneath the cut end 10a of the cas' In some instances, more or less of the s eath will be extended or withdrawn, depending entirely upon the location of the inner section 16 within the cable inwardl of its cut end. In some instances, it may b e desirable to provide wider bushing or shielding sections than the sections 16. This may be accomplished by increasing the width of the folds in making up the layers 13, 14 and 15, or as will be apparent, two adjacent, transverse, folded sections may be secured together to make the bushing or shielding section twice the width of that shown in Fig. 2. This would also apply to the structure shown in Fig. 8 of the drawing, which is later described.

In this connection, it will also be apparent that the width of the folds in the res ctive sections of the sheath may be varie without departing from the spirit of my invention.

In Fig. 3 of the drawing, I have shown a slight modification in the form of the protector sheath, and in said figure, 12a represents a sheath similar to the sheath 12; 13a, 14a, 15a, the upper, lower and intermediate layers provided in the respective sections and 17a and the sections 160 are characterized or marked as indicated at 19a and adhered or secured together as indicated at 18a. The structural difference between the two sections resides in the provision of supplemental strips or sheets 20 which are d d between two of the 13 rs 18a, 14a, its, the strip 20 'being position between the layers 14a and 15a in the construction shown.

It will be understood that the strips 20 will reinforce and'stren en the bushing or shield sections 16, especially if the strip ma-' terial from which the sheath 12a is formed should be comparatively thin. I also refer to have one side edge of the strips 28 roe ctasseenat20aandbefreeorunattac ed with respect to the layer of the adjacent sect10ns 17a so as to 't the outward folding of and edge 20a if desired to aid in securin the sections 16a in (position at the free and o the outer casing 1 a In thisconnection, it will be understood that the sections 16--16a are of greater thickness than the intermediate sections 17-170, and thus fit veri snugly in the casing 10. It will therefore e apparent that these sections extending longitudinally throughout the entire len h of the cable, will serve to properly posit1on the conductors within the outer casing 10, and yet permit the free fie!- ure ,of the outer casing and the protector sheath 1 2-12a, by virtue of the flexibility of the sections 17 and the fact that the same are to extend longitudinally of the casmg In Fig. 4 of the drawing, I have shown at 21 another form of protector sheath, which differs from the sheaths 12, 12a, in that the bushlipxfipr shield sections 22 are spaced a art by c ed, corrugated or otherwise f dad or formed intermediate sections 23, which rmit l 'tudinal extension of the sheath 1 to facihtate the positioning of one of the sections 22 beneath the cut and 10a. of the casing 10. The sections 22 are formed by folding the strip from which the sheath 21 is formed in thesame manner as the fold of the sections 16. It will be understood that the sections 22 may be folded in the manner of eguivalent sections shown in Fig. 60f the rawing, later described. The sections 22 will be marked or characterized as indicated at 24 so as to distinguish the same from the intermediate sections 23.

In Fig. 5 of the drawing, I have shown a protector sheath or wrap 25 which is formed from a stri of fibrous material folded in a manner di erent from the fold of the strip forming the sheath 12, so as to form compgratively wide top layers 26 as well as wide ttom layers 27, with narrower intermediate layers 28 goining adjacent ends of the layers 26 and 2 the layers 27 overlapping the intersection of the layers 26. In like manm ner, the layers 26 overlap the intersections of the layers 27, thus forming three ply thickness throughout the entire length of the sheath 25. With this construction, longitudinally spaced sections 26a formed by the layers 26 are secured to the folded s1de portions of two adjacent lower layers 27 and to the intermediate layers 28 therebetween by a suitable adhesive as indicated at 29, or in any other desired manner so as to form of the sections 26a, bushing or shield sections s1m1- lar to the sections 16--16a, and the sections 22, whereas the intermediate sections 26?) and 27a are free to be extended to facilitate the positioning of the sections 26a beneath the cut end 10a of the casing 10.

As hereinbefore stated, it will be understood that my improved protector sheath or wrap may be employed in connection w th electric conductors of any kind or class 1ncluding the various types of metalhc cable or conductors as well as the non-metallic sheathed cable and conductors.

It will also be understood that any suitable means may be employed for coupling or connecting the bushing or shield sections so as to permit relative movement of saidse'ctions with respect to each other to facilitate the withdrawal of a section from within the out- 1 er casing to a position adjacent and beneath the severed or cut end thereof. While I have shown certain forms of protector sheaths and specific methods of folding the same and securing the separate folds together, t will be apparent that I am not necessarily limited 1n these respects nor to the structural details herein shown and described, and various changes therein and modifications thereof may be made within the scope of the appended claims without departing from the spirit of my invention or sacrificing 1ts advantages.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a conductor of the class described, a sheath comprising an elongated strip of insulating material folded transversely upon itself to form a plurality of longitudinal sections, each section containing two or more plies of said strip, means for securing the plies of predetermined, longitudinally spaced sections together to form thereof spaced bushing sections, and the sections between the bushing sections permitting the movement of 7 one bushing section with respect to the other.

2. In a conductor of the class described, a sheath comprising an elongated strip of insulating material folded transversely upon itself to form a plurality of longitudinal sections, each section containing two or more plies of said strip, means for securing the plies of predetermined, longitudinally spaced sections together to form thereof spaced bushing sections, the sections between the ing sections, the sections between the bushing sections permitting the movement of one bushing section with respect to the other, a reinforcin strip arranged between and secured to t e ply of the bushing sections to strengthen the same, and said strips having free edge portions.

4. The combination with a conductor of the class described comprising an outer casing or jacket and a conductor strand disposed within said jacket, of means arranged on the strand within said casing and movable longitudinally thereof for providing an insulator and protector bushing around the strand at and beneath the end of said casing, said means comprising a plurality of substantially rigid bushings arranged longitudinally of the strand and bushing connecting portions accessible beyond one end of the casing for drawing one of said bushings from within the casing to a point beneath the end thereof and around the conductor strand at said end.

5. In conductors of the class described employing a conductor strand, a casing or j acket enclosing said strand, and a protector sheath wrapped around the conductor within said casing, said sheath being treated at longitudinally s aced intervals to form substantially rigid liushing sections, the sheath including means intermediate the bushing sections whereby the sheath may be extended with respect to. the casing to position one of said bushing sections beneath oneend portion of said casing to shield and insulate the conductor strand at said end of the casing.

6. In conductors of the class described employing a conductor strand, a casing or jacket enclosing said strand, and a protector sheath wrapped around the conductor within said casing, said sheath being treated at longitudinally spaced intervals to form substan tially rigid bushing sections, the sheath including means intermediate the bushing sections whereby the sheath may be extended with respect to the casing to position one of said bushing sections beneath one end portion of said casing to shield and insulate the conductor strand at said end of the casing, said means comprising extensible portions on the sheath intermediate the bushing sections.

7. In conductors of the class described emplo mg a conductor strand, a casing or jacket enc osin said strand, a protector sheath wrappe around the conductor within said casing, said sheath being treated at longitudinally spaced interva s to form substantially rigid bushing sections, the sheath including means intermediate the bushing sections whereby the sheath may be extended with res ct to the casing to position one of said bus ing sections beneath one end portion of said casing to shield and insulate the conductor strand at said end of the casing, and means for distinguishin the bushing sections from the remainder o the sheath.

8. The combination with a conductor of the class described employing an outer casing or jacket and a conductor strand disposed within said jacket, of a plurality of insulator bushings arranged and spaced longitudinally of the strand within said casing and means including said bushings movable longitudinally of the strand and within the casing and through one open end of the casing for orming and positioning an insulator and protector bushing around the strand at and beneath the open end of said casing.

9. In electric conductors of the class described comprising a flexible, metallic casing and insulated conductor strands within said casing, a sheath of insulating material in the form of an elongated fibrous strip laid longitudinall of the strands and folded circumferential y therearound to envelo the strands within said casing, said sheath ing treated at lon itudinally spaced intervals to form substantially rigid bushing sections enveloping said strands and the sheath intermediate the bushing sections including means whereby an end of said sheath may be withdrawn through one cut end of the casing to position one of said bushing sections around the conductor strands beneath the cut end of said casing. 10. In electric conductors of the class described comprising a flexible, metallic casing and insulated conductor strands within 881d casing, a sheath of insulating material in the form of an elongated fibrous strip laid longitudinall of the strands and folded circumferential y therearound to envelo the strands within said casing, said sheath ing treated at longitudinally spaced intervals to form substantially rigid bushing sections enveloping said strands and the sheath intermediate the bushing sections including means whereby an end of said sheath may be withdrawn through one cut end of the casing to position'one of said bushing sections around the conductor strands beneath the cut end of said casing, and means for reinforcing the bushing sections of said sheath.

11. In electric conductors of the class described comprising a flexible, metallic casing and insulated conductor strands within said casing, a sheath of insulating material in.

the form of an elongated fibrous strip laid longitudinally of the strands and folded circumferentially therearound to envclo the strands within said casing, said sheath ing treated at longitudinal] spaced intervals to form substantially rigi bushing sections envelo ing said strands and the sheath intermediate the bushing sections including means whereby an end of said sheath may be withdrawn through one cut end of the casing to position one of said bushing sections around the conductor strands beneath the cut end of said casing, and means for distinguishin the bushing sections from the remainder o the sheath.

12. In electric conductors of the class described comprising a flexible, metallic casin and insulated conductor strands within sai casing, a sheath of insulating material in the form of an elon ted fibrous strip laid longitudinally of t e strands and folded circumferentially therearound to envelo the strands within said casing, said sheath eing treated at longitudinal] spaced intervals to form substantially rigi bushing sections enveloping said strands and the sheath intermediate the bushin sections including means whereby an end of said sheath may be withdrawn through one cut end of the casing to position one of said bushing sections around the conductor strands beneath the cut end of said casing. and said last named means comprisin gathered portions on the sheath interme iate said bushing sections facilitating longitudinal extension of the sheath with respect to the strands and casing.

13. In electriciconductors of the class described a sheath of insulating material wrap ed around a conductor strand said sheat comprising an elongated strip of fibrous material folded transversely to form a plurality of multiple ply sections, the ly of predetermined sections of said sheath being secured together to form thereof s aced bushing sections between the con uctor strand and an outer body.

14. In electric conductors of the class described a sheath of insulating material wrap around a conductor strand, said sheat comprising an elongated stri of fibrous material folded transversely to erm a plurality of multiple ply sections, the ly of predetermined sections of said sheath ing secured together to form thereof s aced bushing sections between the con uctor strand and an outer body, and the ply of the sections intermediate the bushing sections being unsecured so that said sections are capable of extension when subjected to lon itudinal pull to move one bushing section with respect to an adjacent bushing section.

15. In electric conductors of the class de- 'scribed a' sheath of insulating material wrapped around a conductor strand, said Ill sheath comprising an elongated strip of fibrous material folded transversely to form a plurality of multiple ply sections, the ply of predetermined sections of said sheath being secured together to form thereof spaced bushing sections between the conductor strand and an outer body, and means for characterizing the bushing sections to distinguish the same from the other sections of said sheath.

16. The combination with a conductor of the class described employing an outer casing or jacket and a conductor strand disposed Within said jacket, of a plurality of insulator bushings arranged and spaced longitudinally of the strand within said casing, means including said bushings movable longitudinally of the strand and Within the casing and through one open end of the casing for forming and positioning an insulator and protector bushing around the strand at and beneath the open end of the casing, and said bushings fitting snugly within said casing and around said strand to support the strand against longitudinal movement With respect to the casing.

In testimony that I claim the foregoing as my invention I have signed my name this 2nd day of November, 1931.

EDWIN J. SCHNEIDER.

Images