US4399419A — Line isolation and interference shielding for a s…

Claim 1

Independent Claim 86 words

A method of isolating the shield of a shielded conductor system from a low frequency power source to which the shield may be coupled, and for shielding the field within the conductor system from ambient high frequency electromagnetic interference, comprising: providing an interruption in the shield; and filling the interruption with dielectric and magnetically absorptive material selected and disposed to create a capacitive coupling across the interruption to isolate the shield and magnetic absorption within the interruption to absorb energy associated with the ambient electromagnetic interference.

Claim 2

Independent Claim 86 words

A method of isolating the shield of a shielded conductor system from a low frequency power source to which the shield may be coupled, and for shielding the field within the conductor system from ambient high frequency electromagnetic interference, comprising: providing an interruption in the shield; and filling the interruption with dielectric and magnetically absorptive material selected and disposed to create a capacitive coupling across the interruption to isolate the shield and magnetic absorption within the interruption to absorb energy associated with the ambient electromagnetic interference.

Claim 3

Dependent Claim 29 words

A method as set forth in claim 1 including providing an inductance within the interruption for coacting with at least some of the dielectric material to form a resonator.

Claim 4

Independent Claim 89 words

A method of isolating the shield of a shielded conductor system from a low frequency power source to which the shield may be coupled, and for shielding the field within the conductor system from ambient high frequency electromagnetic interference, comprising: providing an interruption in the shield; and situating within the interruption a series of dielectric elements separated by abutting magnetically absorptive material to create a capacitive coupling across the interruption to isolate the shield and magnetic absorption within the interruption to absorb energy associated with the ambient electromagnetic interference.

Claim 5

Independent Claim 89 words

A method of isolating the shield of a shielded conductor system from a low frequency power source to which the shield may be coupled, and for shielding the field within the conductor system from ambient high frequency electromagnetic interference, comprising: providing an interruption in the shield; and situating within the interruption a series of dielectric elements separated by abutting magnetically absorptive material to create a capacitive coupling across the interruption to isolate the shield and magnetic absorption within the interruption to absorb energy associated with the ambient electromagnetic interference.

Claim 6

Dependent Claim 25 words

The method as set forth in claim 2 including situating within said interruption discrete elements of dielectric material and magnetically absorptive material in alternating sequence.

Claim 7

Dependent Claim 37 words

A method as set forth in claim 4 further including providing an inductance within the interruption for coacting with at least one element of dielectric material to provide a series resonant circuit at a selected television frequency.

Claim 8

Dependent Claim 41 words

A method as set forth in claim 5 wherein said one element of dielectric material has an outer conductive coating thereon, and wherein said inductance is formed by a conductive finger connected between the dielectric element's conductive coating and the shield.

Claim 9

Dependent Claim 55 words

A method as set forth in claim 4 wherein the shield includes a relatively large diameter portion separated by the interruption from a relatively smaller diameter portion, such that the relatively large diameter portion overlaps the smaller diameter portion, and wherein the dielectric and magnetically absorptive elements are disposed between overlapping portions of the shield.

Claim 10

Dependent Claim 22 words

A method as set forth in claim 4 wherein said dielectric and magnetically absorptive elements are aligned coaxially within the shield's interruption.

Claim 11

Dependent Claim 51 words

A method as set forth in claim 4 wherein the shield is interrupted with a pair of radial flanges, arranged vis-a-vis, and wherein said dielectric and magnetically absorptive elements are sandwiched between the flanges and concentrically arranged such that the alternating sequence is in a direction radial to the conductor system.

Claim 12

Dependent Claim 77 words

A method as set forth in claim 4 wherein the interruption is provided by separating the shield into two parts, turning the ends of the separated parts and interleaving the turned ends so as to provide a total of at least three spaces between the interleaved parts, and wherein magnetically absorptive material is disposed in one of said spaces, and dielectric material is disposed in two of said spaces on opposite sides of the magnetically absorptive material.

Claim 13

Dependent Claim 21 words

A method as set forth in claim 10 wherein said dielectric and magnetically absorptive elements are aligned coaxially in said interruption.

Claim 14

Dependent Claim 24 words

A method as set forth in claim 10 wherein said dielectric and magnetically absorptive elements are aligned radially with respect to the conductor system.

Claim 15

Independent Claim 107 words

A method of providing A.C. line isolation between a shielded conductor system and a television tuner input adapted to receive television signals from the conductor system, and for shielding the desired high frequency field within the conductor system from ambient electromagnetic interference, comprising: providing an interruption between an outer shield associated with the conductor system, and an outer conductor associated with the tuner input; and disposing within the interruption a series of dielectric elements separated by abutting magnetically absorptive material to create a capacitive coupling across the interruption to isolate the shield and magnetic absorption within the interruption to absorb energy associated with the ambient electromagnetic interference.

Claim 16

Independent Claim 107 words

A method of providing A.C. line isolation between a shielded conductor system and a television tuner input adapted to receive television signals from the conductor system, and for shielding the desired high frequency field within the conductor system from ambient electromagnetic interference, comprising: providing an interruption between an outer shield associated with the conductor system, and an outer conductor associated with the tuner input; and disposing within the interruption a series of dielectric elements separated by abutting magnetically absorptive material to create a capacitive coupling across the interruption to isolate the shield and magnetic absorption within the interruption to absorb energy associated with the ambient electromagnetic interference.

Claim 17

Dependent Claim 48 words

A method as set forth in claim 13 wherein the interruption is established by providing an area of axial overlap between the outer conductor of the tuner input and the shield, and wherein the dielectric elements and magnetically absorptive material are disposed in said area of axial overlap.

Claim 18

Dependent Claim 64 words

A method as set forth in claim 14 wherein the outer conductor of the tuner input has a relatively large diameter and the shield associated with the conductor system has a relatively small diameter, and wherein the dielectric elements and magnetically absorptive material are disposed in an area of axial overlap between the relatively large diameter outer conductor and the relatively smaller diameter shield.

Claim 19

Dependent Claim 34 words

A method as set forth in claim 14, wherein said dielectric elements and magnetically absorptive material comprises at least two discrete elements of dielectric material separated by a discrete element of magnetically absorptive material.

Claim 20

Independent Claim 152 words

A method of providing A.C. line isolation in a path coupling the shield of a shielded conductor to a conductor associated with the input of a television tuner, and for shielding the desired field within the shielded conductor from ambient electromagnetic interference, comprising: providing an interruption in the path of coupling between the conductor associated with the tuner input and the shield; and filling the interruption with dielectric and magnetically absorptive material so as to create a first capacitance which decouples the path at A.C. line frequencies and shunts a substantial portion of electromagnetic interference induced in the outer skin of the shield, a region of magnetic absorption for absorbing residual electromagnetic interference not shunted by said first capacitance, and a second capacitance to provide additional A.C. decoupling of said path and to couple the signal within the shielded conductor to the tuner input and away from the region of magnetic absorption.

Claim 21

Independent Claim 152 words

A method of providing A.C. line isolation in a path coupling the shield of a shielded conductor to a conductor associated with the input of a television tuner, and for shielding the desired field within the shielded conductor from ambient electromagnetic interference, comprising: providing an interruption in the path of coupling between the conductor associated with the tuner input and the shield; and filling the interruption with dielectric and magnetically absorptive material so as to create a first capacitance which decouples the path at A.C. line frequencies and shunts a substantial portion of electromagnetic interference induced in the outer skin of the shield, a region of magnetic absorption for absorbing residual electromagnetic interference not shunted by said first capacitance, and a second capacitance to provide additional A.C. decoupling of said path and to couple the signal within the shielded conductor to the tuner input and away from the region of magnetic absorption.

Claim 22

Dependent Claim 117 words

In a system employing a shielded conductor which carries a desired high frequency signal, and whose shield is adpated to be coupled to a low frequency power source, an isolator for isolating the conductor's shield from the low frequency power source and for shielding the desired field within the conductor from ambient high frequency electromagnetic interference, comprising: means defining an interruption in the shield; and magnetically absorptive material and dielectric material situated within the interruption such that said materials are closely adjacent each other, said materials being selected and disposed to create a capacitive coupling across the interruption to isolate the shield and magnetic absorption within the interruption to absorb energy associated with the ambient electromagnetic interference.

Claim 23

Dependent Claim 117 words

In a system employing a shielded conductor which carries a desired high frequency signal, and whose shield is adpated to be coupled to a low frequency power source, an isolator for isolating the conductor's shield from the low frequency power source and for shielding the desired field within the conductor from ambient high frequency electromagnetic interference, comprising: means defining an interruption in the shield; and magnetically absorptive material and dielectric material situated within the interruption such that said materials are closely adjacent each other, said materials being selected and disposed to create a capacitive coupling across the interruption to isolate the shield and magnetic absorption within the interruption to absorb energy associated with the ambient electromagnetic interference.

Claim 24

Dependent Claim 28 words

An isolator as set forth in claim 18 including an inductance within the interruption for coacting with at least some of the dielectric material to form a resonator.

Claim 25

Dependent Claim 105 words

In a system employing a shielded conductor which carries a desired high frequency signal, and whose shield is adapted to be coupled to a low frequency power source, an isolator for isolating the conductor's shield from the low frequency power source and for shielding the desired field within the conductor from ambient high frequency electromagnetic interference, comprising: means defining an interruption in the shield; and a series of dielectric elements separated by magnetically absorptive material filling said interruption to create a capacitive coupling across the interruption to isolate the shield and magnetic absorption within the interruption to absorb energy associated with the ambient electromagnetic interference.

Claim 26

Dependent Claim 105 words

In a system employing a shielded conductor which carries a desired high frequency signal, and whose shield is adapted to be coupled to a low frequency power source, an isolator for isolating the conductor's shield from the low frequency power source and for shielding the desired field within the conductor from ambient high frequency electromagnetic interference, comprising: means defining an interruption in the shield; and a series of dielectric elements separated by magnetically absorptive material filling said interruption to create a capacitive coupling across the interruption to isolate the shield and magnetic absorption within the interruption to absorb energy associated with the ambient electromagnetic interference.

Claim 27

Dependent Claim 32 words

An isolator as set forth in claim 20 wherein discrete elements of dielectric material are disposed in said interruption in alternating sequence with one or more discrete elements of magnetically absorptive material.

Claim 28

Dependent Claim 24 words

An isolator as set forth in claim 21 wherein the dielectric and magnetically absorptive elements are disposed in an abutting relationship with each other.

Claim 29

Dependent Claim 36 words

An isolator as set forth in claim 21 further including an inductance within the interruption for coacting with at least one element of dielectric material to provide a series resonant circuit at a selected television frequency.

Claim 30

Dependent Claim 39 words

An isolator as set forth in claim 23 wherein said one element of dielectric material has an outer conductive coating thereon, and wherein said inductance includes a conductive finger connected between the dielectric element's conductive coating and the shield.

Claim 31

Dependent Claim 55 words

An isolator as set forth in claim 21 wherein the shield includes a relatively large diameter portion separated by the interruption from a relatively smaller diameter portion, such that the relatively large diameter portion overlaps the smaller diameter portion, and wherein the dielectric and magnetically absorptive elements are disposed between overlapping portions of the shield.

Claim 32

Dependent Claim 22 words

An isolator as set forth in claim 21 wherein said dielectric and magnetically absorptive elements are aligned coaxially within the shield's interruption.

Claim 33

Dependent Claim 50 words

An isolator as set forth in claim 21 wherein the shield is interrupted with a pair of radial flanges arranged vis-av-s, and wherein said dielectric and magnetically absorptive elements are sandwiched between the flanges and concentrically arranged such that the alternating sequence is in a direction radial to the cable.

Claim 34

Dependent Claim 77 words

An isolator as set forth in claim 21 wherein the interruption is provided by separating the shield into two parts, turning the ends and interleaving the turned ends of the separated parts so as to provide a total of at least three spaces between the interleaved parts, and wherein magnetically absorptive material is disposed in one of said spaces and dielectric material is disposed in two of said spaces on opposite sides of the magnetically absorptive material.

Claim 35

Dependent Claim 21 words

An isolator as set forth in claim 28 wherein said dielectric and magnetically absorptive elements are aligned coaxially within the interruption.

Claim 36

Dependent Claim 23 words

An isolator as set forth in claim 28 wherein said dielectric and magnetically absorptive elements are aligned radially with respect to the conductor.

Claim 37

Dependent Claim 116 words

In a television receiver having a tuner connected via a coupling path to at least the shield of a shielded conductor for receipt of a television signal carried by the conductor, an isolator for isolating the shield from A.C. line voltages which may be coupled to the tuner and for shielding the field within the conductor from ambient high frequency electromagnetic interference, comprising: means defining an interruption in the coupling path; and a series of dielectric elements separated by abutting magnetically absorptive material disposed in the interruption so as to create a capacitive coupling across the interruption to isolate the shield and magnetic absorption within the interruption to absorb energy associated with the ambient electromagnetic interference.

Claim 38

Dependent Claim 116 words

In a television receiver having a tuner connected via a coupling path to at least the shield of a shielded conductor for receipt of a television signal carried by the conductor, an isolator for isolating the shield from A.C. line voltages which may be coupled to the tuner and for shielding the field within the conductor from ambient high frequency electromagnetic interference, comprising: means defining an interruption in the coupling path; and a series of dielectric elements separated by abutting magnetically absorptive material disposed in the interruption so as to create a capacitive coupling across the interruption to isolate the shield and magnetic absorption within the interruption to absorb energy associated with the ambient electromagnetic interference.

Claim 39

Dependent Claim 32 words

An isolator as set forth in claim 31, wherein discrete elements of dielectric material are disposed in said interruption in alternating sequence with one or more discrete elements of magnetically absorptive material.

Claim 40

Dependent Claim 58 words

An isolator as set forth in claim 32, wherein the tuner has a coaxial connection for coupling to the conductor, wherein said connection has an outer diameter greater than the outer diameter of the conductor for partly overlapping the conductor, and wherein the interruption is provided between the conductor's shield and the overlapping portion of the tuner connection.

Claim 41

Dependent Claim 21 words

An isolator as set forth in claim 33, wherein the dielectric and magnetically absorptive elements are aligned coaxially within the interruption.

Claim 42

Dependent Claim 33 words

An isolator as set forth in claim 34 including an inductance within the interruption for coacting with at least one element of dielectric material to form a resonator at a selected television frequency.

Claim 43

Dependent Claim 113 words

In a television receiver having a tuner receiving an RF signal carried by a shielded conductor, an isolator for isolating the conductor's shielded from A.C. line voltages which may be coupled to the tuner and for shielding the field within the shielded conductor from ambient high frequency electromagnetic interference, comprising: shield means connected to the tuner and having a diameter which is larger than the diameter of the conductor's shield, said shield means being disposed to coaxially overlap the shielded conductor; and a pair of dielectric elements and a ferrite element disposed within said axial overlap, all said elements being disposed in abutting relationship with each other and aligned coaxially within the overlap.

Claim 44

Dependent Claim 113 words

In a television receiver having a tuner receiving an RF signal carried by a shielded conductor, an isolator for isolating the conductor's shielded from A.C. line voltages which may be coupled to the tuner and for shielding the field within the shielded conductor from ambient high frequency electromagnetic interference, comprising: shield means connected to the tuner and having a diameter which is larger than the diameter of the conductor's shield, said shield means being disposed to coaxially overlap the shielded conductor; and a pair of dielectric elements and a ferrite element disposed within said axial overlap, all said elements being disposed in abutting relationship with each other and aligned coaxially within the overlap.

Claim 45

Dependent Claim 75 words

In a system employing a shielded conductor which carries a desired high frequency signal and whose shield may be coupled to a low frequency power source, an isolator for isolating the conductor's shield from the low frequency power source and for shielding the desired field within the conductor from ambient high frequency electromagnetic interference, comprising: means defining an interruption in the shield; and magnetically absorptive material and at least one resonator situated within the interruption.

Claim 46

Dependent Claim 75 words

In a system employing a shielded conductor which carries a desired high frequency signal and whose shield may be coupled to a low frequency power source, an isolator for isolating the conductor's shield from the low frequency power source and for shielding the desired field within the conductor from ambient high frequency electromagnetic interference, comprising: means defining an interruption in the shield; and magnetically absorptive material and at least one resonator situated within the interruption.

Claim 47

Dependent Claim 31 words

An isolator as set forth in claim 37 wherein said resonator includes a dielecric element and distributed inductance associated therewith for establishing a condition of series resonance at selected television frequencies.

Claim 48

Dependent Claim 22 words

An isolator as set forth in claim 37 wherein the resonator includes dielectric material and an inductance coupled to the dielectric material.

Claim 49

Dependent Claim 30 words

An isolator as set forth in claim 39 wherein said dielectric material has an outer conductive coating, and wherein the inductance is coupled between the conductive coating and the shield.

Claim 50

Dependent Claim 22 words

An isolator as set forth in claim 40 wherein the inductance comprises a part of the shield which projects into the interruption.

Claim 51

Dependent Claim 26 words

An isolator as set forth in claim 41 wherein the dielectric material's conductive coating is held from electrical contact with the shield except via the inductance.

Claim 52

Dependent Claim 42 words

An isolator as set forth in claim 42 wherein said dielectric and magnetically absorptive materials are discrete elements disposed around the conductor, and further including in the interruption at least one additional discrete dielectric element which does not function as a resonator.

Claim 53

Dependent Claim 52 words

An isolator as set forth in claim 43 wherein the magnetically absorptive and additional dielectric element are annular in shape and have substantially the same outer diameter, and wherein the dielectric element forming part of the resonator has a relatively smaller outer diameter to inhibit its conductive coating from contacting the shield.

Claim 54

Dependent Claim 50 words

An isolator as set forth in claim 43 wherein the magnetically absorptive element and all the dielectric elements are annular in shape and have substantially the same outer diameter, and wherein the shield is formed to avoid contact between itself and the dielectric element which forms part of the resonator.

Claim 55

Dependent Claim 127 words

In a television system having a tuner for receiving an RF signal from a shielded conductor, an isolator for isolating the conductor's shield from low frequency power which may be coupled to the tuner and for shielding the RF field within the conductor from ambient high frequency electromagnetic interference, comprising: conductive means coupled to the tuner and mated with the conductor's shield so that an area of axial overlap occurs between the conductor's shield and the conductive means; at least first and second dielectric elements disposed in said area of axial overlap; a magnetically absorptive element disposed between the first and second dielectric elements; and an inductance associated with the first dielectric element to resonate with the first dielectric element at at least one selected television frequency.

Claim 56

Dependent Claim 127 words

In a television system having a tuner for receiving an RF signal from a shielded conductor, an isolator for isolating the conductor's shield from low frequency power which may be coupled to the tuner and for shielding the RF field within the conductor from ambient high frequency electromagnetic interference, comprising: conductive means coupled to the tuner and mated with the conductor's shield so that an area of axial overlap occurs between the conductor's shield and the conductive means; at least first and second dielectric elements disposed in said area of axial overlap; a magnetically absorptive element disposed between the first and second dielectric elements; and an inductance associated with the first dielectric element to resonate with the first dielectric element at at least one selected television frequency.

Claim 57

Dependent Claim 17 words

An isolator as set forth in claim 46 wherein the dielectric elements abut the magnetically absorptive element.

Claim 58

Dependent Claim 35 words

An isolator as set forth in claim 46 wherein the first dielectric element has a conductive coating thereon, and wherein said inductance includes a conductive finger connected between the conductive coating and the conductive means.

Claim 59

Dependent Claim 47 words

An isolator as set forth in claim 48 wherein the conductive finger comprises a part of the conductive means, the dimensions of the finger and the properties of the first dielectric element being selected to establish series resonance at a frequency in the lower VHF television band.

Claim 60

Dependent Claim 38 words

An isolator as set forth in claim 48 wherein the conductive means and the first dielectric element are shaped to avoid electrical contact between the conductive means and the conductive coating except by means of the conductive finger.

Claim 61

Dependent Claim 47 words

An isolator as set forth in claim 46 wherein said first dielectric element has a conductive coating thereon with a gap in the coating to create a distributed form of said inductance, and including a relatively short electrical connection between said conductive means and the conductive coating.

Claim 62

Dependent Claim 58 words

An isolator as set forth in claim 51 wherein the first dielctric element is annular in shape with said conductive coating on the outer periphery thereof and another conductive coating on an inner periphery thereof, and wherein the mean circumference of the first dielectric element and its dielectric constant are selected to establish a condition of series resonance.

Claim 63

Dependent Claim 24 words

An isolator as set forth in claim 52 wherein series resonance is selected to occur at a frequency in the low VHF television band.

Claim 64

Dependent Claim 30 words

An isolator as set forth in claim 52 wherein the first dielecric element and its conductive coatings are selected to establish a condition of series resonance at multiple selected frequencies.

Claim 65

Dependent Claim 25 words

An isolator as set forth in claim 46 including an additional dielectric element and an inductance associated therewith for establishing another condition of series resonance.

Claim 66

Dependent Claim 74 words

For a television receiver having a tuner connected via a coupling path to at least the shield of a shielded conductor for receipt of a television signal carried by the conductor, the improvement comprising: means defining an interruption in the coupling path; and a series of dielectric elements separated by abutting magnetically absorptive material disposed in the interruption so as to create a capacitive coupling across the interruption and magnetic absorption within the interruption.

Claim 67

Dependent Claim 74 words

For a television receiver having a tuner connected via a coupling path to at least the shield of a shielded conductor for receipt of a television signal carried by the conductor, the improvement comprising: means defining an interruption in the coupling path; and a series of dielectric elements separated by abutting magnetically absorptive material disposed in the interruption so as to create a capacitive coupling across the interruption and magnetic absorption within the interruption.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1986-08-15	1987-02-14	1987-08-16	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1990-08-15	1991-02-14	1991-08-16	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1994-08-15	1995-02-14	1995-08-16	$7700.00	Window Closed / Lapsed

Line isolation and interference shielding for a shielded conductor system

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