MXPA99002938A - Water-hermetic cable holder, free of tens - Google Patents

Abstract

A set of cable fastener components that, when applied to an electric cable, provide a water-tight, tension-free cable tie. A body having a hole with a tapered end wall and the external threaded portion receives an inlet isolator having a tapered taper portion. An assembly device having a second tapered end wall and an internal threaded portion receives a clamping device having a plurality of movable nails. When the assembly device is screwed into the body, the inlet insulation is compressed on a cable inserted into the cable holder to provide a watertight seal and some tension release while the movable claws of the fastener hold Secure the cable to provide most of the tension release. To the exchanger the entrance insulator and the clamping device, to others that have holes of different diameter, and provided with the body and the assembly device, the cable clamp can accommodate a wide range of cable diameters.

Description

WATER-HERMETIC CABLE HOLDER, FREE OF STRESS BACKGROUND OF THE INVENTION FIELD OF THE INVENTION The invention relates to electrical cable fastening devices and more particularly to a device, which provides a water-tight, voltage-free connection with an electrical cable terminated by an electrical switch or receptacles or connected to an electrical box.

Description of the prior art. Devices of the prior art are known, which employ a deformable insulator trapped between two tapered walls or between a tapered and a straight wall and deformed by assembling a collar nut to a body to provide a watertight seal for passing through it an electric cable. This joint also provides a limited amount of tension release. The prior art also shows the use of slotted insulators to provide tension release for a cable fastener but the water tight seal is achieved by means of separate O-rings. A prior art device shows a cable fastener, which includes a deformable insulator and fastening means in the form of a circular member, which provides a single clamping edge for the insulation of the cable and if the cable fastener is Tighten too much can cut through the insulation of the electric cable. Also, since only an individual size of deformable insulator and fastening means are provided, the wire fastener is limited to the scale of and diameters where it can be accommodated. As the diameter of the cable increases and the clamping ring opens to accommodate said cable, the circular member is able to hold less of the periphery of the cable producing an unequal tension release.

COMPENDIUM OF THE INVENTION The present invention solves the difficulties mentioned above with respect to the prior art. An equipment of components is provided, which includes an individual body, individual assembly means or collar nut and a plurality of deformable insulators, and a plurality of fastening devices, which can be used with the body and the collar nut to handle a wide range of electric cable diameters. The body has a first portion with a first threaded outer region to be threadedly engaged by the collar nut to assemble the cable fastener. The body has a second portion, which can have a second external region threaded to be placed in an ejector and be fastened to the wall of the electrical box using a lock nut. Alternatively, the second portion may be an electrical switch or receptacles or other electrical device. The body has a hole through it. Within the first portion, the hole has a larger diameter and tapers to a smaller diameter through the rest of the body. A plurality of deformable insulators are provided, all having the same outer profile. One portion has a long taper to match that taper in the body. Another portion has a short tapered portion. Each of the insulators has a different sized opening extending therethrough and a flexible zone of different size around the opening. The flexible zone allows the opening to expand for the largest cable diameters in its scale. A plurality of fastening devices are provided, all having the same outer profile. A base ring, having a slot that allows the expansion of the ring, as it is placed around a cable, has a plurality of baffle fingers arranged to extend along the longitudinal axis of the cable passing through the fastener of the cable. cable. The nails, each one, have tips turned inwards perpendicular to the nails, and the ends of said tips define an opening through them. For the smaller openings, the tips are substantially pointed while for the larger openings the ends of the tips are flat. The ends of the tips will be fully engaged with the cable insulation when the fastener is fully assembled. A taper within the ring matches the short tapered portion of the insulator and acts to center the fastening means as the cable clamp is assembled. The final element is the assembling means or collar nut, which has a first internally threaded region in the larger orifice portion, which threadably engages the first externally threaded portion of the body. The outlet end of the collar nut has a smaller hole diameter and the transition between the two holes provides a second tapered wall. The exterior of the collar nut has a plurality of edges and depressions to make it easier to assemble the collar nut to the body. The second tapered wall couples the ends of the clamps of the clamping device and forces the tips to fit intimately with the insulation of the cable to provide excellent tension release. It is an object of the present invention to provide a novel electrical cable fastener device. It is an object of the present invention to provide an electric cable fastener device which employs a single size body and collar nut, and a plurality of deformable insulators and fasteners with different sizes of openings to allow the fastener cable is used with a wide range of cable diameters It is an object of the present invention to provide nested deformable insulators and fastening devices, whose opening dimensions can be altered by applying simultaneous axial forces to said insulators and said fastening devices. It is still another object of the present invention to provide a component kit having an individual body and a collar nut and a plurality of deformable insulations and fastening means, which can be selected according to the diameter of the cable on which the Cable fastener is placed. Other objects and features of the invention will be pointed out in the following description and claims and will be illustrated in the attached drawings, which describe, by way of example, the principles of the invention, and the best way, currently contemplated, to carry them out.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings, in which similar elements receive similar reference numbers: Figure 1 is a side elevational view of a cable fastener assembly constructed in accordance with the concepts of the invention. Figure 2 is an exploded side view of a component equipment of a cable fastener, constructed in accordance with the concepts of the invention, and showing the cable fastener used with an electrical switch. Figure 3 is an exploded perspective view of the device of Figure 2. Figure 4 is a side elevation view of the body portion of the cable fastener of Figure 2. Figure 5 is an elevation view side of a body portion for use with an electrical box. Figure 6 is a front perspective view of a plurality of fastening devices of the equipment of Figure 2. Figure 7 is a rear perspective view of the fastening devices of Figure 6. Figure 8 is a front view of the devices of Figure 6. Figure 9 is a side elevational view, in section, taken along lines 9-9 of Figure 8. Figure 10 is a front elevational view of a plurality of deformable equipment insulators. of Figure 2. Figure 11 is a rear elevational view of the insulators of Figure 10. Figure 12 is a side elevation view of a deformable insulator and fastener means in their initial contact position. Figure 13 is a side elevational view of the devices of Figure 12 fully assembled.

Figure 14 is a side elevational view, partly in section, of the body and collar nut of Figure 1, disassembled. Referring now to Figures 1 to 4, a set of components is shown, some of which are chosen and assembled to provide a tension-free, water-tight electrical cable fastener 20. The cable fastener 20 is composed of a body 22 (see Figure 4), one of the selected deformable insulators 24, one of the selected fastening devices 26 and an assembly device or collar nut 28. The body 22 has an externally threaded portion 50, a base 52 and three ( only two can be seen in Figure 4) spacers 54 with threaded holes therein (not shown). An insulating, hollow skin 36 is placed along the electrical cable 32 and through the body portion 22 and joined to make contact with the connecting screws 38 of the plug 34. The screws 40 extend through the plug 34 and penetrate the threaded spacers 54 for assembling the plug 34 to the body 22. The assembled plug 34 and the body 22 can now be pushed into the insulating sheath 36 so that the current and neutral contacts 42, and the grounding contact 44 extend beyond of the liner 36. A socket could be installed on the body 22, in which case the front surface of the outlet could, within the open end of the liner 36 (not shown) and the total of the insulated outlet, be as shown by the liner 36 a the left of Figure 14. Only the externally threaded portion 50 of the body 22 extends outwardly from the cladding 36 to assemble the collet nut. n to this as will be described later. A water-tight, stress-free joint could also be made at the entrance of an electric cable or a cable inside an ejector of an electrical box. In such a case, a body 70 having two externally threaded portions is used (see Figure 5). A first externally threaded portion is equal to the portion 50 of the body 22 and will receive a collar nut therein. A second externally threaded portion 74 is adapted to extend through an ejector 76 in a panel 78 and receive a lock nut 80 therein so that the panel 78 is securely held between the shoulder 82 and the lock nut 80. The cable clamp assembly 20 will be the same regardless of the body used. Referring to Figure 14, the internal structure of the body 22 and the body 70 are shown. An orifice 90 extends completely through the bodies 22 and 70. From a point within the body 22. to approximately where the externally threaded portion 50 begins, the orifice it tapers outwards as in 92 to leave a thin wall 94 at the leading edge 96. The rest of the hole 90 is generally uniform for the rest of the bodies 22 and 70.

The element for providing the watertight seal around the electric cable and providing some tension release is the deformable insulator 24 shown in Figures 2,3 and 10 to 14. As shown in these figures, a plurality of deformable insulators are provided. 24a, 24b and 24c, each connected to an adjacent deformator in the form of a chain. Although only three insulators are shown, this number can increase or decrease as desired. Each of the insulators 24a, 24b, and 24c have the same external profile. The profile of these insulators 24 includes a long tapered surface 56, which conforms to the taper 92 of the bodies 22 and 70. A short tapered surface 58 is formed at the leading edge 60 of the insulator 24. The tapered short surface 58 will engage with the tapered surface in the fastener means to help center the fastener means on the deformable insulator 24. The insulator 24a is intended to handle the smaller cables in the range of cable diameters that the cable fastener 20 can handle. In this way it has the smaller hole 62 extending from the tracking edge 61 of the leading edge 60. A highly flexible and stretchable region 64 is provided around the hole 62 by means of a counter-orifice 66, which leaves a thick flange 68. A contraorific 84 around the orifice 62 of the tracking edge 61 leaves a flexible and stretchable region 86, wider than the similar region 64, and a flange 88 narrower than the flange 68. Thinner wall thickness extends from the flange 88 and the wider region 86 allows the entire deformable insulator 24a to be compressed as the insulator 24a is forced along the tapered wall 92 of the body 22 to securely hold the perimeter of the cable 32 and provide a water tight connection with some tension release. The thicker wall extending from the flange 68 prevents the insulator from collapsing and provides a suitable surface for coupling the fastener device as will be described later. The flexible and stretchable regions 64 and 86 allow the orifice 62 to be lengthened by radial compression of the regions if the diameter of the cable is not much larger than the original diameter of the orifice 62. For larger cable diameters, a portion of the region can be displaced along the surface of the cable in the direction of the longitudinal axis of the cable. The insulation 24b has a larger hole 102 than the orifice 62 of the insulator 24a to receive intermediate cable diameters. Counterorientation 106 provides a flexible and stretchable region 104 and a flange termination wall 108, which is thicker than the flange termination wall 68 so that the largest range of cable diameters can be handled and also because There is less chance of the cable diameter of the insulator 24b collapsing during assembly. The counter-bore 114 leaves a region 116 around the bore 102 and a flange terminated wall 118. The insulator that handles the widest range of cables is 24c, which has a central bore 122, counter-punched as in 126 to provide the region 124 around the hole 122 and the flange terminated wall 128 at the leading edge 60. From the trailing edge 61, a counter-bore 136 provides a wall extending from the rim 138 and a region 134. The captive 98 joins the insulator 24a with the insulator 24b while the captive 100 extends between the insulators 24b and 24c. Captives 98 and 100 hold the insulators together in a chain-like fashion until the insulators are going to be used and then separate by cutting the junction between the captives and the insulators. The captives 98 and 100 are formed at the same time as the insulators are molded and can be the mold corridors between the adjacent mold cavities. Referring now to Figures 6 to 9, 12 and 13, a plurality of fastening devices are shown, one of which is used as part of the cable fastener 20. The fastening devices 140 are also formed to have a uniform outer profile and the range of sizes of the diameters of cable which the individual fastening devices 140 are placed to handle is determined by the size of the openings defined by the tips of the movable nails of each device 140. In contrast to the deformable insulators 24 the inner profile of each fastening device 140 also is the same. A base ring 142 has a flat cylindrical surface 144, which is divided as in 146 so that the ring 142 can be opened to allow it to be placed around an electrical cable (not shown). The inner bottom edge of the base ring 142 is bevelled, as in 148 (see Figure 9) to accept the short tapered surface 58 at the leading edge 60 of an isolator 24 and center the fastener 140 and maintain it in a suitable position during the assembly of the fastener device 140 before the cable is introduced into the device 140. As shown in Figure 12, the fastener device 140 is placed on the surface 58 of the insulator 24 but the device 140 is not fully seated. Figure 13 shows the fastener device fully seated in the insulator 24 with no portion of the surface 58 exposed. This occurs as the base ring 142 expands to accept the surface 58 of the insulator 24. In this position the assembly of the collar nut 28 to the body 22 allows the fastening device 140 to be activated as will be described later. Referring now to Figures 6 to 9, a series of movable nails 150 extend from the base ring 142. Each of the nails 150 is made of two substantially parallel ribs 152 perpendicular to the base ring 142 with a thin band 154 that unites them. This provides an increase in flexibility of the nails 150 on a solid nail. The nails 150 are separated by slots 156, which allow each nail to move separately and to a different degree if the cable is not completely symmetrical. Each of the nails 150 terminates in a beveled surface 158, which engages a tapered wall in the collar nut 28 to cause the nails 150 to move in intimate contact with the insulation of the cable. One of the slots 156 is aligned with the partition 146 of the base ring 142, so that the fastening device 140 can be installed on a cable. On the inside, the free ends of the nails 150 are placed with the tips turned in 160. The tips 160 each have a length and an end surface, which couple the insulation of the cable and its length and shape are determined by the diameter of the cable with which it is used. The tips 160a of the fastening device 140a are long and terminate at a substantially dotted surface, which describes a small passage 162 therebetween. The tips 160b are shorter than the tips 160a and have a round end surface much wider than the tips 160a and define a larger passageway 164. The larger end surface and the shorter tips are those of the holding device 140c. The tips 160c define a passage 166.

Figure 14 shows the inside of the collar assembly or nut assembly 28. A hole 170 extends from an open end 172 to a partially closed end 174. The hole 170 adjacent the open end 172 and extending almost to the partially closed end 174 is internally threaded as in 176 to threadably couple the external thread 50 with the body 22 and allow its assembly. The partially closed end 174 has a cable opening 178 therethrough.

Extending from the end of the threaded portion 176 to the partially closed end 174 is a tapered surface 180. The engagement of the bevelled surface 158 of the fastener 140 with the tapered surface 180 of the collar nut 28 controls the position of the fingers 150 and the degree of engagement of the tips 160 with a cable extending through the cable holder 20. A collar 182 extends around the outside of the collar nut 28 at the open end 172 and a series of ribs 184 with depressions 186 between they extend around the outer periphery of the collar nut 28 to facilitate installation and disassembly of the collar nut 28 of the body 22. To use the cable holder 20 with an electrical plug 34, a body 22 as shown in Figure 4 it would be necessary. A deformable insulator 24 having an orifice diameter, which is a little smaller than the diameter of the cable 32 and its trailing edge 61 would be inserted into the bore of the body 22 with the long tapered surface 56 by engaging the tapered wall 92, would be selected. of the body 22. Thereafter, the cable is inserted through the opening 178 of the collar nut 28 and moved away from the cable end 32. Then, a fastening device 140, having a passage with a diameter a little smaller than the diameter of the cable 32, is placed around the cable 32 by opening the base ring 142 in the partition 146 and separating the fingers 150 in the associated slot 156 and with the beveled inner edge 148 facing the tapered short edge 58 of the insulator 24 and separate away from the cable end 32. The cable 32 is now passed through the hole of the insulator 24 and the body 22 with the end of the cable 32 beyond the end of the sheath 36. The end of the cable and leads Individual screws are prepared and fixed to the appropriate contact connection screws 38 (see Figure 2). The plug 34 is assembled to the body 22 using the screws 40 and the threaded spacers 54. The assembled plug 34 and the body 22 can now be pushed into the insulating coating 36 and any excess cable 32 pulled through the body 22. The fastening device 140, previously placed around the cable 32, advances along the cable 32 until the beveled edge 148 of the device 140 engages the short tapered surface 58 of the insulator 24 (see Figure 12). The collar nut 28 now advances towards the exposed end of the body 22 and the internal threads 176 of the collar nut 28 engage the external threads 50 of the body 22. As the collar nut 28 advances by means of the applied pressure to the outer ribs 184, the fastening device 140 is fully seated on the insulator 24, the beveled edge of the device 140 is in full contact with the tapered surface 180 of the collar nut 28 and the long tapered portion 56 of the insulator 24 is in total contact with the tapered wall 92 of the body 22.

As the collar nut 28 advances further on the body 22, it will compress the insulator 28 radially and the area around the hole in the insulator 28 will hermetically clamp the outer cable 32 providing a good watertight connection. Part of the tension release is also given by that union. As the tapered wall 180 of the collar nut 28 acts on the bevelled ends 158 of the fastening device 140, the nails 150 move inwardly so that the tips 160 securely hold the insulation of the cable 32 providing excellent tension release. The collar nut 28 advances to give adjustment and no tool is needed and if used could damage the cable 32. To disassemble the cable holder 20 from the cable 32, the previous steps are performed in reverse. Since the fundamental novel features of the invention have been shown and described and indicated as they apply to the preferred embodiments, it should be understood that various omissions and substitutions and changes in the form and details of the devices illustrated and in their operation can be made by those skilled in the art, without departing from the spirit of the invention.

Claims (23)

1. A tension-free, water-tight cable fastener comprising: a. a substantially cylindrical body having a first end and a second end and a hole extending therethrough from said first end to said second end substantially concentric with the longitudinal axis of said cylindrical body, said hole adapted to receive an electrical cable inside it; b. said hole being tapered out from a point between said first and second ends to the second end to provide a first frusto-conical wall adjacent said second end; c. said body having an externally threaded portion adjacent said second end and substantially overlapping with said frusto-conical wall; d. a deformable insulator having a first end and a second end and a hole therethrough; and. said deformable insulator having an outer tapered surface adjacent said first end, said external tapered surface of said deformable insulator being complementary to said frusto-conical wall of said cylindrical body; F. fastener means having a base ring at a first end and a plurality of movable nails extending from it towards a second end, the tips of said nails describing at said second end a cable passage, said fastening means adapted to be positioned to align said nails with the longitudinal axis of the axis of said body; g. assembly means having a substantially cylindrical body member having a first open end and a partially closed second end and a hole extending from said first end towards said second end; h. a second frusto-conical wall extending from the hole in said assembly means between said first end and said second end to said partially closed end; i. said second frusto-conical wall acting on said nails to control the size of said cable passage; and j. at least a portion of said orifice assembly means being internally threaded to threadably couple said externally threaded body portion to assemble said cable holder in the electric cable.

A cable fastener according to claim 1, wherein said base ring of fastening means is cut to allow said fastening means to be placed around an electric cable in the center.

A cable fastener according to claim 1, wherein said tips of said nails extend perpendicularly to the longitudinal axis of said body.

A cable fastener according to claim 1, wherein said tips of said nails are substantially pointed to securely hold a cable extending through said cable passage.

A cable fastener according to claim 3, wherein said tips of said nails are substantially pointed to securely hold a cable extending through said cable passage.

6. A cable fastener according to claim 1, wherein each of the displaceable nails comprises: a. first rib means extending from said base ring to said nail tip; b. second rib means, substantially parallel with and spaced apart from said first rib means; and c. thin band media connected to and between said first and second rib means wherein the nails have a reduced cross section and are more easily displaced.

7. A cable fastener according to claim 5, wherein each of the displaceable nails comprises: a. first rib means extending from said base ring to said nail tip; b. second nail means, substantially parallel with and spaced apart from said first rib means; and c. thin band media connected to and between said first and second rib means wherein said nails have a reduced cross section and are more easily displaceable.

8. a cable fastener according to claim 1, wherein said tips of said nails are substantially planar to securely hold a cable extending through said cable passage.

9. A cable fastener according to claim 3, wherein said tips of said nails are substantially planar to securely hold a cable extending through said cable passage.

A cable fastener according to claim 8, wherein each of the displaceable nails comprises: a. first rib means extending from said base ring to said nail tip; b. second rib means, substantially parallel with and spaced apart from said first rib means; and c. thin band media connected to and between said first and second rib means wherein said nails have a reduced cross section and are more easily displaced.

11. A cable fastener according to claim 9, wherein each of the displaceable nails comprises: a. first rib means extending from said base ring to said nail tip; b. second rib means, substantially parallel with and spaced apart from said first rib means; and c. thin band media connected to and between said first and second rib means wherein said nails have a reduced cross section and are more easily displaced.

12. A cable fastener according to claim 1, wherein: a. said deformable insulator has a tapered edge adjacent said first end; and b. said base ring fastening means have a third frusto-conical wall tapered inwardly of said first end, said third frusto-conical wall being complementary to said tapered edge of said first cable fastener end, wherein said cable fastening means is centered in said cable fastening means. orifice of said assembly means with respect to said deformable insulator as said assembly means are assembled to said body.

A cable fastener according to claim 1, wherein: said body has an additional externally threaded portion adjacent said first end for mounting said cable fastener on a support.

A cable fastener according to claim 1, wherein: said assembling means of the body member has a plurality of depressions in the external surface thereof extending substantially from said first end to said second end to provide a fastening for facilitate the assembly and disassembly of said assembly means with said body.

A cable fastener according to claim 1, wherein the hole through said deformable insulator has a diameter adapted to receive a range of cable diameters therethrough; said cable clip further comprises: a. a wall in said hole of said deformable insulator; and b. an opening in said wall provided to allow a cable, within a range of cable diameters, which the associated hole can receive, to pass through it in a sealing coupling with the wall defining said opening, said wall defines said opening holding said cable more firmly as said first end of the deformable insulator is forced into the body along said frusto-conical wall.

16. In a tension-free water-tight cable fastener of the type having a cylindrical body, a deformable insulator, fastening means and assembly means, the improvement comprises: a. a plurality of deformable insulators joined to each other in chain form, each of the insulators has the same outer profile; b. each of the insulators has a hole therethrough, said orifice having a diameter adapted to receive a range of cable diameters therethrough; c. a wall in said hole of said deformable insulator; and d. an opening in said wall provided to allow a cable, within the range of cable diameters, which, the associated hole can receive to pass through them in a sealing coupling with the wall defining said opening; said wall defines said opening that holds said cable more firmly as the first end of said deformable insulator is forced into said body along said first frustoconical wall in said body, wherein a deformable insulator having an opening for receiving the inserted cable is separated from the chain of said insulators and placed between said body and said securing means to receive the inserted cable.

17. In a tension-free water-tight cable fastener of the type having a cylindrical body, a deformable insulator, fastening means and assembly means, the improvement comprises: a. a plurality of fastening means joined to one another in the form of a chain, each of the fastening members has the same outer profile; b. each of the fastening means has a base ring at the first end and a plurality of movable nails extending away from said ring, the tips of said nails at the second free end describe a cable passage, each of which clamping means is adapted to be placed between said deformable insulator and said assembly means with said claws aligned with the longitudinal axis of said body; c. said passage has an initial diameter adapted to receive a range of cable diameters therethrough; d. said passage diameter is reduced from said initial diameter and the tips of said nails cause the bite of the insulation of the cable having a diameter in the range of diameters of the cable, the passage being arranged to receive and pass through said cable clip to as said nails are forced towards each other by their engagement with an internal surface of said assembly means, wherein the fastening means having a passage for receiving the inserted cable are separated from the chain of said fastening means and placed between said deformable insulator and said assembly means for receiving the inserted cable.

18. In a strain-free, water-tight cable fastener of the type having a cylindrical body, a deformable insulator, fastening means and assembly means, the improvement comprises: a. a plurality of deformable insulators joined to one another in the form of a chain, each of the insulators having the same outer profile; b. each of the insulators has a hole therethrough, said orifice having a diameter adapted to receive a range of cable diameters therethrough; c. a wall in said hole of said deformable insulator; d. an opening in said wall provided to allow a cable, within the range of cable diameters whose associated hole can receive, to pass through these in a sealing coupling with the wall defining said opening; said wall defines said opening holding said cable more firmly as the first end of said deformable insulator is forced into said body along the first frusto-conical wall in said body, wherein a deformable insulator has an opening for receiving the cable chosen is separated from said chain of insulators and is placed between said body and said fastening means to receive the chosen cable; and. a plurality of fastening means that are joined to each other in the form of a chain, each of the fastening means having the same outer profile; F. each of said means have a base ring at a first end and a plurality of movable nails extending away from said ring, the tips of said nails at a second free end describe a cable passage, each of the means fastening adapted to be placed between said deformable insulator and said assembly means with said nails aligned with the longitudinal axis of said body; g. said passage has an initial diameter adapted to receive a range of cable diameters therethrough; and h. said passage diameter is reduced from said initial diameter which causes the tips of said nails to bite the insulation of the cable, having a diameter in the range of the cable diameters, the passage is arranged to receive or pass through said fastener of cable as said nails are forced towards each other by their engagement with a second frustoconical wall in said assembly means, wherein fastening means having a passage receiving the inserted cable are separated from the chain of said means of assembly. fastening and placed between said deformable insulator and said assembly means to receive the inserted cable.

19. A tension-free, water-tight cable fastener for use with electric cables having a range of diameters, a set of cable fastener components comprising: a. a substantially cylindrical body having a first end and a second end and a hole extending therethrough from said first end to said second end substantially concentric with the longitudinal axis of said cylindrical body, said orifice being adapted to receive a cable electrical inside it; said hole being tapered out from a point between said first and second ends to said second end to provide a first frusto-conical wall adjacent said second end; said body has an externally threaded portion adjacent said second end and substantially '10 overlapping said frusto-conical wall; a plurality of deformable insulators each having a first end and a second end and a hole therethrough and an outer tapered surface adjacent said first end, said The external tapered surface of said deformable insulator is complementary to said frusto-conical wall of said cylindrical body, each of the insulations having the same outer profile; each of said deformable insulations has a 20 hole of different diameter through it to accept different cables from the range of cable diameters which the cable holder can accommodate; said deformable insulators are connected to one another in the form of a chain wherein the insulator 25 deformable having an orifice diameter to accept the diameter of cable can be separated from the other deformable insulators and placed in said hole of the cylindrical body; fastening means having a base ring at a first end and a plurality of movable nails extending from it towards the second end, the types of said nails describe at said second free end a cable passage, said fastening means being they adapt to be placed to align said nails with the longitudinal axis of said body; assembly means having a substantially cylindrical body member having a first open end and a partially closed second end and a hole extending from said first end toward Said second end; a second frustoconical wall extending from the hole in said assembly means between said first and second end to said partially closed end: said second frustoconical wall acting on said nails to control the diameter of the cable passage; and at least a portion of said hole of the internally threaded assembly means for threadably coupling said externally threaded portion for assembling said cable fastener in the electrical cable.

20. A tension-free, water-tight cable fastener for use with electrical cables having a wide range of diameters, a set of cable fastener components comprising: a. a substantially cylindrical body having a first end and a second end and a hole extending therethrough from said first end to said second end substantially concentric with the longitudinal axis of said cylindrical body, said orifice being adapted to receive a cable electrical inside it; b. said hole is tapered out from a point between said first and second end to said second end to provide a first frusto-conical wall adjacent said second end; c. said body has an externally threaded portion adjacent said second end and substantially overlapping said frusto-conical wall; d. a deformable insulator having a first end and a second end, and a hole therethrough; and. said deformable insulator has a tapered surface adjacent said first end, said external tapered surface of said deformable insulator is complementary to said frustoconical wall of said cylindrical body; a plurality of fastening means each having a base ring at a first end and a plurality of movable nails extending away from said ring, the tips of said nails at a second free end, describe a cable passage, each of the fastening means adapted to be placed between said deformable insulator and the assembly means with said nails aligned with the longitudinal axis of said axis of said body; g. each of the fastening means has a different initial diameter of passage to accept different cables in the range of cable diameters which the cable fastener can accommodate; h. said passage diameter is reduced from said initial diameter causing the tips of said nails to bite the insulation of the cable, having a diameter in the range of the cable diameters, the passage being arranged to accommodate and pass through said fastening means of cable as said nails are forced one towards the other by its coupling with a second frusto-conical wall in the assembly means; i. said fastening means being connected to one another in the form of a chain wherein the fastening means having a passage diameter for accepting the diameter of the cable to be inserted in said cable fastener can be separated from the other fastening means and placed adjacent to said fastening means. the exposed face of said deformable insulator in said body; j. assembly means having a substantially cylindrical body member having a first open end and a partially closed second end and a hole extending from said first end towards said second end; k. a second frusto-conical wall extending from the hole in said assembly means between said first and second end to said partially closed end; I. said second frusto-conical wall acting on said nails to control the diameter of said cable passage; and m. at least a portion of said orifice of the assembly means being internally threaded to threadably couple said externally threaded body portion to threadably couple said cable holder to the electrical cable.

21. A tension-free, water-tight cable fastener for use with electric cables having a wide range of diameters, a set of cable fastening components comprising: a. a substantially cylindrical body having a first end and a second end and a hole extending therethrough from said first end to said second end substantially concentric with the longitudinal axis of said cylindrical body, said orifice being adapted to receive a cable electrical inside it; said hole is tapered from a point between said first and second end to said second end to provide a first frusto-conical wall adjacent said second end; said body has an externally threaded portion adjacent said second end and substantially overlapping said frusto-conical wall; d. a plurality of deformable insulators each 15 having a first end and a second end and a hole therethrough and an outer tapered surface adjacent said first end, said tapered surface of said deformable insulator being complementary to said frustoconical wall of said 20 cylindrical body, each of the insulators has the same outer profile; each of the deformable insulators has a different cable diameter through these to accept different cables from the range of cable diameters which the cable holder can accommodate; said deformable insulator is connected to one another in the form of a chain in which the deformable insulator having an orifice diameter for accepting the cable diameter can be separated from the other deformable insulators and can be placed in said cylindrical body orifice; a plurality of fastening means each having a base ring at a first end and a plurality of movable nails extending away from said 10, the tips of said nails in the second free end, describe a cable passage, each of the fastening means adapted to be placed between said deformable insulator and the assembly means with said nails aligned with the longitudinal axis of said 15 body; each of the fastening means has a different initial diameter of passage to accept different cables from the range of cable diameters which the cable fastener can accommodate; Said passage diameter is reduced from said initial diameter and causes the tips of said nails to bite the insulation of the cable, having a diameter in the range of cable diameters the passage is arranged to accommodate and pass through said fastening means 25 of cable as said nails are forced towards each other by coupling with a second frusto-conical wall in the assembly means; j. said fastening means are connected to one another in the form of a chain wherein the fastening means having a passage diameter for accepting the diameter of cable to be inserted in said cable fastener can be separated from the other fastening means and placed adjacent to the face exposed from said deformable insulator in said body; k. assembly means having a substantially cylindrical body member having a first open end and a partially closed second end and a hole extending from said first end towards said second end; I. a second frusto-conical wall extending from the hole in said assembly means between said first and second end towards said partially closed end; m. at least a portion of said assembly means hole being internally threaded to threadably couple said externally threaded body portion to assemble said wire fastener in the electrical cable.

22. The method for assembling a tension-free water-tight cable fastener usable with a range of cable diameters to an electric cable comprising the steps of: a. selecting a deformable insulator having a hole that can accommodate a selected wire and separating said insulator from a plurality of said insulators connected to one another in the form of a chain, each having different hole sizes to accept certain wires in said range; b. inserting said insulator into the tapered hole of a cable fastener body having an externally threaded portion; c. applying an assembly device having a hole therethrough and a portion of said hole containing an internal thread to an externally threaded body portion; d. inserting a cable through the holes of said cable fastening body, said deformable insulator and said assembly device; and e. advancing said assembly device completely on said fastening body to deform said deformable insulator and causing said insulator to firmly hold said cable.

23. The method for assembling a water tight cable fastener, voltage-free useable with a range of cable diameters to an electric cable comprising the steps of: selecting a deformable insulator having a hole to accommodate a selected cable and separating said insulator from a plurality of said insulators connected to each other in chain shape, each has different hole sizes to accept certain cables in said range; inserting said insulator into the tapered hole of a cable fastener body having an externally threaded portion; selecting the cable fastener means having a passage between their nails aligned with the longitudinal axis of said body, said passage having a diameter to allow said selected cable to pass therethrough, and separating said cable fastening means from a plurality of said cable fastener means connected to each other in the form of a chain, each having a passage of different diameter to accept certain ends in said range; inserting said cable fastener means into a hole of an assembly device having a hole therethrough and a portion of said hole containing an internal thread; and. threaded by a coupling the internally threaded portion of said assembly device to the externally threaded portion of said cable fastener body; and advancing said assembly device completely on said cable fastening body to deform said deformable insulator and closing said passage of the cable fastening means to cause said insulator to firmly grip said cable and cause the tips of said nails to bite the insulation of said cable. said cable to provide a watertight connection, 10 free of tension between said cable and said cable clamp.