US3777049A — Bonding device and anchorage for shielded cables

Claim 1

Independent Claim 212 words

In combination with a cable having a tough plastic sheath enclosing a thin metal shield jacket, a mechanically strong high electrical capacity bonding device designed to utilize the strength of a wide area portion of the cable sheath as a backup support for the cable shield in the area thereof embraced by the bonding device and held forcibly compressed together between portions of said bonding device, said device comprising a wide Ushaped sheet metal clip having an aligned pair of openings through the legs thereof, a multiplicity of sharp burrs projecting toward one another from the inner faces of each of said legs about said aligned openings, said cable sheath and shield having aligned openings therethrough near an edge thereof, said clip embracing the edge of said cable sheath and shield with the openings thereof aligned with the intervening openings in said sheath and shield, and clamping stud means assembled through all of said aligned openings holding wide areas of said sheath and shield forcibly compressed together between the legs of said clip with the sharp burrs on one leg penetrating into said sheath and the sharp burrs on the other leg penetrating into said shield to make multiple electrical contacts therewith, and a conductive grounding member securely connected to said clip.

Claim 2

Dependent Claim 212 words

In combination with a cable having a tough plastic sheath enclosing a thin metal shield jacket, a mechanically strong high electrical capacity bonding device designed to utilize the strength of a wide area portion of the cable sheath as a backup support for the cable shield in the area thereof embraced by the bonding device and held forcibly compressed together between portions of said bonding device, said device comprising a wide Ushaped sheet metal clip having an aligned pair of openings through the legs thereof, a multiplicity of sharp burrs projecting toward one another from the inner faces of each of said legs about said aligned openings, said cable sheath and shield having aligned openings therethrough near an edge thereof, said clip embracing the edge of said cable sheath and shield with the openings thereof aligned with the intervening openings in said sheath and shield, and clamping stud means assembled through all of said aligned openings holding wide areas of said sheath and shield forcibly compressed together between the legs of said clip with the sharp burrs on one leg penetrating into said sheath and the sharp burrs on the other leg penetrating into said shield to make multiple electrical contacts therewith, and a conductive grounding member securely connected to said clip.

Claim 3

Dependent Claim 44 words

The combination defined in claim 1 characterized in that said stud means is permanently secured within the opening in one of said clip legs with its other end extending through the aligned openings in said sheath, shield and the other leg of said clip.

Claim 4

Dependent Claim 36 words

The combination defined in claim 1 characterized in that said stud means is threaded and provided with a clamping nut for holding said grounding conductor and said clip detachably assembled to said cable sheath and shield.

Claim 5

Dependent Claim 118 words

That method of electrically and mechanically terminating the end of a shielded electrical cable to an anchorage therefor which comprises: slitting the end of the cable sheath and shield lengthwise from the end of the cable, perforating the flattened sheath and shield inwardly from the edge thereof to receive fastener stud means, placing a U-shaped conductive clip astride said sheath edge which clip is provided with sharp burrs projecting from the inner surface thereof, and clamping said legs against said sheath and shield and a conductive grounded anchorage for the cable by said fastener stud means passing through said legs and said perforation through the shield and sheath to force said burrs to penetrate into said cable shield.

Claim 6

Dependent Claim 118 words

That method of electrically and mechanically terminating the end of a shielded electrical cable to an anchorage therefor which comprises: slitting the end of the cable sheath and shield lengthwise from the end of the cable, perforating the flattened sheath and shield inwardly from the edge thereof to receive fastener stud means, placing a U-shaped conductive clip astride said sheath edge which clip is provided with sharp burrs projecting from the inner surface thereof, and clamping said legs against said sheath and shield and a conductive grounded anchorage for the cable by said fastener stud means passing through said legs and said perforation through the shield and sheath to force said burrs to penetrate into said cable shield.

Claim 7

Dependent Claim 32 words

That method defined in claim 4 characterized in the step of anchoring said cable sheath to terminal strip means having a plurality of conductive terminals for individual ones of the cable conductors.

Claim 8

Dependent Claim 58 words

That method defined in claim 4 characterized in the step of utilizing a U-shaped clip having sharp burrs along the inner side of each leg thereof, and compressing the burrs in one leg thereof into the cable shield and the burrs in the other leg thereof into the cable sheath as said fastener stud means is forcibly tightened.

Claim 9

Dependent Claim 144 words

That method defined in claim 4 characterized in the step of slitting the shields and sheaths of a pair of electrical cables to facilitate expansion of a length of the sheath and shield of each away from the cable conductors, forming aligned holes through the shield and sheath of each of said cables spaced inwardly of an edge of each, superimposing the expanded sheaths of said cables against one another with their shilds facing outwardly and with said holes in registry, placing a stud-equipped U-shaped conductive clip astride said shields and sheaths and inserting said stud through said holes and the legs of said clip, providing thE inner surfaces of said clip legs with sharp burrs, and clamping said legs together by tightening nut means assembles to said stud threby to force said burrs to penetrate into the juxtaposed one of said cable shields.

Claim 10

Dependent Claim 29 words

That method defined in claim 7 characterized in the step of utilizing said stud to clamp said clip and said cable ends to a fixed anchorage for said cables.

Claim 11

Dependent Claim 27 words

That method defined in claim 7 characterized in the step of connecting a conductive grounding member to said clip thereby to ground each of said cable shields.

Claim 12

Dependent Claim 105 words

That method of mechanically connecting two cable ends together and simultaneously electrically bonding the cable electrical shields to one another which comprises: slitting the cable shields and sheaths and flattening the same with their sheaths against one another and their shields facing outwardly, forming a hole inwardly of the edge of each of said shields and sheaths, placing a conductive clip astride said edges which clip has burrs facing toward one another along the inner surfaces of each leg, clamping said legs forcibly against said sheaths and shields by tightening fastener means assembled through said legs and said holes as said burrs penetrate said shields.

Claim 13

Dependent Claim 105 words

That method of mechanically connecting two cable ends together and simultaneously electrically bonding the cable electrical shields to one another which comprises: slitting the cable shields and sheaths and flattening the same with their sheaths against one another and their shields facing outwardly, forming a hole inwardly of the edge of each of said shields and sheaths, placing a conductive clip astride said edges which clip has burrs facing toward one another along the inner surfaces of each leg, clamping said legs forcibly against said sheaths and shields by tightening fastener means assembled through said legs and said holes as said burrs penetrate said shields.

Claim 14

Dependent Claim 159 words

That method of providing a high-capacity high-strength bonding connection to the normally concealed shield jackets of a shielded cable which comprises: opening the cable sheath and shield from one end thereof to expose the conductors and permit flattening a short length of the sheath and shield; perforating said sheath and shield inwardly from the edge thereof to provide a pair of aligned openings; sandwiching the perforated portions of said sheath and shield between the legs of wide area U-shaped conductive strap means provided with a plurality of perforations having sharp burrs along the rims thereof and distributed about openings through said legs aligned with said pair of openings through said shield jacket and sheath; and utilizing high strength conductive fastener means extending through said aligned openings and the terminal end of a grounding conductors to clamp said conductor, said shield, said conductive means and said sheath immovably together with said sharp burrs penetrating the adjacent surface of said shield.

Claim 15

Dependent Claim 159 words

That method of providing a high-capacity high-strength bonding connection to the normally concealed shield jackets of a shielded cable which comprises: opening the cable sheath and shield from one end thereof to expose the conductors and permit flattening a short length of the sheath and shield; perforating said sheath and shield inwardly from the edge thereof to provide a pair of aligned openings; sandwiching the perforated portions of said sheath and shield between the legs of wide area U-shaped conductive strap means provided with a plurality of perforations having sharp burrs along the rims thereof and distributed about openings through said legs aligned with said pair of openings through said shield jacket and sheath; and utilizing high strength conductive fastener means extending through said aligned openings and the terminal end of a grounding conductors to clamp said conductor, said shield, said conductive means and said sheath immovably together with said sharp burrs penetrating the adjacent surface of said shield.

Claim 16

Dependent Claim 71 words

That method defined in claim 11 characterized in the step of providing said conductive strap means with a set of sharp burrs on each leg thereof so disposed that one set penetrates the juxtaposed surface of said shield and the other set of which penetrates the juxtaposed surface of said sheath as said fastener means is tightened to compress said conductive means against the intervening portions of said sheath and shield.

Claim 17

Dependent Claim 27 words

That method defined in claim 11 characterized in the step of utilizing said fastener means to anchor said sheath and shield to an anchorage for said cable.

Claim 18

Dependent Claim 27 words

That method defined in claim 11 characterized in the step of utilizing fastener means of the type having a threaded shank and a threaded nut mateable therewith.

Claim 19

Dependent Claim 68 words

That method defined in claim 11 characterized in the steps of forming aligned openings in the free ends of the legs of said U-shaped strap means and providing the adjacent inner faces of said strap means in the area surrounding said aligned openings with a multiplicity of sharp burrs effective to penetrate into said sheath and shield as said U-shaped strap means is compressed by said fastener means.

Claim 20

Dependent Claim 155 words

That method of providing a high strength electrical and mechanical connection with the shielding jacket of a sheath-enclosed shielded cable which comprises: opening the non-conductive cable sheath and the underlying conductive shield to expose the cable conductors and to provide access to the shield, forming aligned openings through said sheath and shield inwardly from the edge thereof to accommodate fastener means, straddling the expanded end portions of said sheath and shield with a wide U-shaped clip having a multiplicity of sharp burrs protruding from the surface of the clip leg Closest to the shield, clamping the legs of said clip tightly over the opposite ends of said aligned openings by conductive fastener means inserted through said aligned openings and the legs of said clip, thereby forcing said multiplicity of sharp burrs to penetrate the surface of said shield as said clip legs are clamped compressively against said shield and cable sheath by said fastener means.

Claim 21

Dependent Claim 155 words

That method of providing a high strength electrical and mechanical connection with the shielding jacket of a sheath-enclosed shielded cable which comprises: opening the non-conductive cable sheath and the underlying conductive shield to expose the cable conductors and to provide access to the shield, forming aligned openings through said sheath and shield inwardly from the edge thereof to accommodate fastener means, straddling the expanded end portions of said sheath and shield with a wide U-shaped clip having a multiplicity of sharp burrs protruding from the surface of the clip leg Closest to the shield, clamping the legs of said clip tightly over the opposite ends of said aligned openings by conductive fastener means inserted through said aligned openings and the legs of said clip, thereby forcing said multiplicity of sharp burrs to penetrate the surface of said shield as said clip legs are clamped compressively against said shield and cable sheath by said fastener means.

Claim 22

Dependent Claim 31 words

That method defined in claim 16 characterized in the step of utilizing said fastener means additionally to anchor a heavy gauge grounding conductor to said fastener and to said U-shaped clip.

Claim 23

Dependent Claim 27 words

That method defined in claim 17 characterized in the step of utilizing said fastener means additionally to clamp said cable sheath and shield firmly to support means.

Claim 24

Dependent Claim 147 words

That method of anchoring a shielded cable to a fixed ground support which comprises: opening a length of the cable sheath and shield from one end to form a flattened anchor tab for the cable lying along one side thereof, forming aligned openings through the portion of said cable sheath and shield forming said anchor tab inwardly from the edge thereof, assembling the openings in said flattened anchor tab over conductive grounded fastener stud means passing through said fixed support with a portion of said shield closely adjacent said stud means in contact with a plurality of sharp conductive burrs, tightening said fastener means to compress said sheath and to force said burrs to penetrate into said shield and provide a high strength large-area anchorage of said flattened anchor tab to said fixed support and a multi-contact pressurized electrical connection between said shield and said grounded support.

Claim 25

Dependent Claim 147 words

That method of anchoring a shielded cable to a fixed ground support which comprises: opening a length of the cable sheath and shield from one end to form a flattened anchor tab for the cable lying along one side thereof, forming aligned openings through the portion of said cable sheath and shield forming said anchor tab inwardly from the edge thereof, assembling the openings in said flattened anchor tab over conductive grounded fastener stud means passing through said fixed support with a portion of said shield closely adjacent said stud means in contact with a plurality of sharp conductive burrs, tightening said fastener means to compress said sheath and to force said burrs to penetrate into said shield and provide a high strength large-area anchorage of said flattened anchor tab to said fixed support and a multi-contact pressurized electrical connection between said shield and said grounded support.

Claim 26

Dependent Claim 73 words

That method defined in claim 19 characterized in the step of assembling large area conductive plate means over said fastener means and formed with a multiplicity of sharp burrs on one face thereof facing toward the surface of said shield in the area surrounding the opening for said fastener means, and tightening said fastener means to clamp said plate means between said shield and a portion of said fastener means which is grounded.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1976-12-03	1977-06-04	1977-12-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1980-12-03	1981-06-04	1981-12-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1984-12-03	1985-06-04	1985-12-04	$7700.00	Window Closed / Lapsed

Bonding device and anchorage for shielded cables

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