US3882427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transient damping means for an electrical installation
Assignee: Allis Chalmers Corp
•
Filing: 1972-12-20
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Granted: 1975-05-06
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Expires: 1992-12-20
Abstract
Abstract There is provided in accordance with an embodiment of the invention a wave trap assembly for connection in series with an electrical conductor means such as an electrical power transmission line for the purpose of attenuating or damping transient high frequency phenomena, and comprising a non-magnetic conductor member received in a slot in a stack of magnetic laminations, whereby the inductive effect of the magnetic laminations causes displacement of the high frequency transient currents into a reduced cross-sectional area of the conductor contiguous the outer periphery of the magnetic laminations, to modify the action of the normal high frequency skin effect whereby to more effectively attenuate the high frequency phenomena. The conductor may be cast in the slot. In a modified embodiment, the radially or peripherally outer portion of the conductor lying in the slot of the stack of magnetic laminations may be made of a higher resistance material than the radially inner portion of the conductor whereby to further attenuate high frequency transient currents flowing in the peripherally outer portion of the conductor. In a still further embodiment of a conductor lying in a slot in a stack of magnetic laminations, a radially inner conductor portion of larger cross section may be connected by a narrow cross-section neck portion to a radially outer conductor portion of smaller cross section than the radially inner conductor portion whereby to promote the transfer of high frequency transients to the outer portion. In another embodiment, the wave trap assembly may comprise a plurality of circumferentially spaced conductor members lying in slots in the peripheral surface of a drum-like stack of magnetic laminations. In still another embodiment, a plurality of wave trap assemblies may be supported by stand-off insulators and by conducting spacers in such manner as to be connected in series with each other and in series with the power transmission line.
Inventors
- 👤 Herbert M Pflanz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:22
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/02; F16F15/03; F16F15/035; H; H01; H01F; H01F37/00
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
153 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents in said circuit, but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a body of magnetic material, a slot extending inwardly and lengthwise of said body from an outer peripheral surface of said body, and an electrical conductor member of nonmagnetic material received in said slot in magnetically inductive relation to said magnetic body, said conductor member extending to contiguous the outer peripheral end of said slot, said conductor member having substantially greater electrical conductivity than said magnetic material, said conductor member being adapted to be connected in circuit with said conductor means whereby to transmit through said conductor member without substantial attenuation electrical currents of normal power frequency and direct current but with substantial attentuation of high frequency electrical voltages and currents.
Claim 2
Independent Claim
153 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents in said circuit, but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a body of magnetic material, a slot extending inwardly and lengthwise of said body from an outer peripheral surface of said body, and an electrical conductor member of nonmagnetic material received in said slot in magnetically inductive relation to said magnetic body, said conductor member extending to contiguous the outer peripheral end of said slot, said conductor member having substantially greater electrical conductivity than said magnetic material, said conductor member being adapted to be connected in circuit with said conductor means whereby to transmit through said conductor member without substantial attenuation electrical currents of normal power frequency and direct current but with substantial attentuation of high frequency electrical voltages and currents.
Claim 3
Dependent Claim
59 words
An apparatus as defined in claim 1 in which said conductor member is of triangular cross section, with an apex of the triangular cross section being located at a peripherally outer portion of said slot, whereby to provide a reduced crosssectional area and hence higher resistance path in the region of said apex for flow of high frequency currents.
Claim 4
Dependent Claim
16 words
An apparatus as defined in claim 1 which said conductor means is an electrical transmission line.
Claim 5
Dependent Claim
18 words
An apparatus as defined in claim 1 in which said conductor member is a casting in said slot.
Claim 6
Dependent Claim
51 words
An apparatus as defined in claim 4 including end clamping means at each of the opposite ends of said stack, and lug-like conductor means conductively connected to said end clamping means, said end clamping means, said lug-like conductor means, and the conductor member in said slot all being a unitary casting.
Claim 7
Dependent Claim
58 words
An apparatus defined in claim 1 in which said body of magnetic material is provided with a plurality of slots each extending lengthwise of said body and each extending inwardly from an outer peripheral edge of said body, said slots being spaced from each other peripherally of said body, and conductor means positioned in each of said slots.
Claim 8
Dependent Claim
22 words
An apparatus as defined in claim 6 in which said body of magnetic material is in the form of a cylindrical drum.
Claim 9
Dependent Claim
32 words
An apparatus as defined in claim 6 in which the conductor means positioned in the plurality of slots are connected in parallel with each other and in series with the transmission line.
Claim 10
Independent Claim
189 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a body of magnetic material, a slot extending inwardly and lengthwise of said body from an outer peripheral edge of said body, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic material, said conductor member being adapted to be connected in circuit with said conductor means, said conductor meMber including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and made of material having good electrical conductive properties, and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said second portion being made of a material which is not as good an electrical conductor as the material of said first portion, whereby said second portion serves as a higher resistance conductive path for high frequency currents.
Claim 11
Independent Claim
189 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a body of magnetic material, a slot extending inwardly and lengthwise of said body from an outer peripheral edge of said body, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic material, said conductor member being adapted to be connected in circuit with said conductor means, said conductor meMber including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and made of material having good electrical conductive properties, and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said second portion being made of a material which is not as good an electrical conductor as the material of said first portion, whereby said second portion serves as a higher resistance conductive path for high frequency currents.
Claim 12
Independent Claim
177 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a body of magnetic material, a slot extending inwardly and lengthwise of said body from an outer peripheral edge of said body, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic material, said conductor member being adapted to be connected in circuit with said conductor means, said conductor member including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area than said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion.
Claim 13
Independent Claim
177 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a body of magnetic material, a slot extending inwardly and lengthwise of said body from an outer peripheral edge of said body, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic material, said conductor member being adapted to be connected in circuit with said conductor means, said conductor member including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area than said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion.
Claim 14
Independent Claim
200 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a body of magnetic material, said body of magnetic material being provided with a plurality of slots each extending lengthwise of said stack and each extending inwardly from an outer peripheral edge of said body, said slots being spaced from each other peripherally of said body, a conductor member of non-magnetic material positioned in each of said slots in magnetically inductive relation to said magnetic material and adapted to be connected in circuit with said conductor means, each conductor member including a first portion lying in an inner portion of the respective slot in inwardly spaced relation to the outer periphery of said slot, and a second portion lying in the respective slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area than said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion.
Claim 15
Independent Claim
200 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a body of magnetic material, said body of magnetic material being provided with a plurality of slots each extending lengthwise of said stack and each extending inwardly from an outer peripheral edge of said body, said slots being spaced from each other peripherally of said body, a conductor member of non-magnetic material positioned in each of said slots in magnetically inductive relation to said magnetic material and adapted to be connected in circuit with said conductor means, each conductor member including a first portion lying in an inner portion of the respective slot in inwardly spaced relation to the outer periphery of said slot, and a second portion lying in the respective slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area than said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion.
Claim 16
Independent Claim
131 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a body of magnetic material, said body of magnetic material being provided with a plurality of slots each extending lengthwise of said body and each extending inwardly from an outer peripheral edge of said body, said slots being spaced from each other peripherally of said body, and an electrical conductor member of non-magnetic material positioned in each of said slots in magnetically inductive relation to said magnetic material, the conductor members positioned in the plurality of slots being connected in series with each other and in circuit with the electrical conductor means.
Claim 17
Independent Claim
131 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a body of magnetic material, said body of magnetic material being provided with a plurality of slots each extending lengthwise of said body and each extending inwardly from an outer peripheral edge of said body, said slots being spaced from each other peripherally of said body, and an electrical conductor member of non-magnetic material positioned in each of said slots in magnetically inductive relation to said magnetic material, the conductor members positioned in the plurality of slots being connected in series with each other and in circuit with the electrical conductor means.
Claim 18
Independent Claim
203 words
An apparatus for connection in circuit with an electrical conductor means to substAntially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a body of magnetic material, a slot extending inwardly and lengthwise of said body from an outer peripheral edge of said body, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic material, said conductor member being adapted to be connected in circuit with said conductor means, said conductor member including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area than said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion, and a narrow neck-like conductor portion connecting said first portion and said second portion along substantially the entire length of said first and said second portions.
Claim 19
Independent Claim
203 words
An apparatus for connection in circuit with an electrical conductor means to substAntially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a body of magnetic material, a slot extending inwardly and lengthwise of said body from an outer peripheral edge of said body, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic material, said conductor member being adapted to be connected in circuit with said conductor means, said conductor member including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area than said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion, and a narrow neck-like conductor portion connecting said first portion and said second portion along substantially the entire length of said first and said second portions.
Claim 20
Independent Claim
218 words
An apparatus for connection in circuit with an electrical conductor menas to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a body of magnetic material, a slot extending inwardly and lengthwise of said stack from an outer peripheral edge of said body, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic material, said conductor member being connected in circuit with said conductor means, said conductor member including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area than said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion, said first portion and said second portion being separated by an air gap along a substantial part of the length of said first portion and said second portion, corresponding ends of said first portion and said second portion being conductively connected to each other.
Claim 21
Independent Claim
218 words
An apparatus for connection in circuit with an electrical conductor menas to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a body of magnetic material, a slot extending inwardly and lengthwise of said stack from an outer peripheral edge of said body, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic material, said conductor member being connected in circuit with said conductor means, said conductor member including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area than said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion, said first portion and said second portion being separated by an air gap along a substantial part of the length of said first portion and said second portion, corresponding ends of said first portion and said second portion being conductively connected to each other.
Claim 22
Independent Claim
189 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a stack of magnetic laminations, a slot extending inwardly and lengthwise of said stack from an outer peripheral edge of said stack, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic laminations, said conductor member being adapted to be connected in circuit with said conductor means, said conductor member including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and made of material having good electrical conductive properties, and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said second portion being made of a material which is not as good an electrical conductor as the material of said first portion, whereby said second portion serves as a higher resistance conductive path for high frequency currents.
Claim 23
Independent Claim
189 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a stack of magnetic laminations, a slot extending inwardly and lengthwise of said stack from an outer peripheral edge of said stack, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic laminations, said conductor member being adapted to be connected in circuit with said conductor means, said conductor member including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and made of material having good electrical conductive properties, and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said second portion being made of a material which is not as good an electrical conductor as the material of said first portion, whereby said second portion serves as a higher resistance conductive path for high frequency currents.
Claim 24
Independent Claim
177 words
An apparatus for connection in circuit with an electrical conductor means to substantiaLly attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a stack of magnetic laminations, a slot extending inwardly and lengthwise of said stack from an outer peripheral edge of said stack, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic laminations, said conductor member being adapted to be connected in circuit with said conductor means, said conductor member including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area then said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion.
Claim 25
Independent Claim
177 words
An apparatus for connection in circuit with an electrical conductor means to substantiaLly attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a stack of magnetic laminations, a slot extending inwardly and lengthwise of said stack from an outer peripheral edge of said stack, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic laminations, said conductor member being adapted to be connected in circuit with said conductor means, said conductor member including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area then said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion.
Claim 26
Independent Claim
203 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents in said circuit but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a stack of magnetic laminations, said stack of magnetic laminations being provided with a plurality of slots each extending lengthwise of said stack and each extending inwardly from an outer peripheral edge of said stack, said slots being spaced from each other peripherally of said stack, a conductor member of non-magnetic material positioned in each of said slots in magnetically inductive relation to said magnetic laminations and adapted to be connected in circuit with said conductor means, each conductor member including a first portion lying in an inner portion of the respective slot in inwardly spaced relation to the outer periphery of said slot, and a second portion lying in the respective slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area than said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion.
Claim 27
Independent Claim
203 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents in said circuit but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a stack of magnetic laminations, said stack of magnetic laminations being provided with a plurality of slots each extending lengthwise of said stack and each extending inwardly from an outer peripheral edge of said stack, said slots being spaced from each other peripherally of said stack, a conductor member of non-magnetic material positioned in each of said slots in magnetically inductive relation to said magnetic laminations and adapted to be connected in circuit with said conductor means, each conductor member including a first portion lying in an inner portion of the respective slot in inwardly spaced relation to the outer periphery of said slot, and a second portion lying in the respective slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area than said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion.
Claim 28
Independent Claim
131 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a stack of magnetic laminations, said stack of magnetic laminations being provided with a plurality of slots each extending lengthwise of said stack and each extending inwardly from an outer peripheral edge of said stack, said slots being spaced from each other peripherally of said stack, and an electrical conductor member of non-magnetic material positioned in each of said slots in magnetically inductive relation to said magnetic laminations, the conductor members positioned in the plurality of slots being connected in series with each other and in circuit with the electrical conductor means.
Claim 29
Independent Claim
131 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a stack of magnetic laminations, said stack of magnetic laminations being provided with a plurality of slots each extending lengthwise of said stack and each extending inwardly from an outer peripheral edge of said stack, said slots being spaced from each other peripherally of said stack, and an electrical conductor member of non-magnetic material positioned in each of said slots in magnetically inductive relation to said magnetic laminations, the conductor members positioned in the plurality of slots being connected in series with each other and in circuit with the electrical conductor means.
Claim 30
Independent Claim
203 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a stack of magnetic laminations, a slot extending inwardly and lengthwise of said stack from an outer peripheral edge of said stack, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic laminations, said conductor member being adapted to be connected in circuit with said conductor means, said conductor member including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area than said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion, and a narrow neck-like conductor portion connecting said first portion and said second portion along substantially the entire length of said first and said second portions.
Claim 31
Independent Claim
203 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a stack of magnetic laminations, a slot extending inwardly and lengthwise of said stack from an outer peripheral edge of said stack, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic laminations, said conductor member being adapted to be connected in circuit with said conductor means, said conductor member including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area than said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion, and a narrow neck-like conductor portion connecting said first portion and said second portion along substantially the entire length of said first and said second portions.
Claim 32
Independent Claim
218 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a stack of magnetic laminations, a slot extending inwardly and lengthwise of said stack from an outer peripheral edge of said stack, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic laminations, said conductor member being connected in circuit with said conductor means, said conductor member including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area than said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion, said first portion and said second portion being separated by an air gap along a substantial part of the length of said first portion and said second portion, corresponding ends of said first portion and said second portion being conductively connected to each other.
Claim 33
Independent Claim
218 words
An apparatus for connection in circuit with an electrical conductor means to substantially attenuate high frequency electrical voltages and currents but which transmits electrical voltages and currents of normal power frequency or direct current without substantial attenuation thereof, comprising a stack of magnetic laminations, a slot extending inwardly and lengthwise of said stack from an outer peripheral edge of said stack, and an electrical conductor member of non-magnetic material received in said slot in magnetically inductive relation to said magnetic laminations, said conductor member being connected in circuit with said conductor means, said conductor member including a first portion lying in an inner portion of said slot in inwardly spaced relation to the outer periphery of said slot and a second portion lying in said slot outwardly of said first portion and nearer the outer periphery of said slot, said first portion being of substantially greater cross-sectional area than said second portion, whereby the smaller cross-sectional area of said second portion presents an increased resistance to high frequency currents flowing in said second portion, said first portion and said second portion being separated by an air gap along a substantial part of the length of said first portion and said second portion, corresponding ends of said first portion and said second portion being conductively connected to each other.
Claim 34
Dependent Claim
293 words
An assembly of damping devices for attenuating high frequency transient phenomena for connection in circuit with an electrical transmission line, each damping device comprising an electrical conductor member extending lengthwise thereof, said assembly comprising a supporting frame member, stand-off insulator means supporting and spacing said frame member relative to a supporting surface, first and second stand-off insulator members positioned in longitudinally spaced relation to each other along said frame member, a first damping device supported contiguous the respective opposite ends thereof by said first and said second stand-off insulator members, means adapted to conductively connect one end of said first damping device in series with said electrical transmission line, said one end of said first damping device being supported by said first stand-off insulator member, a first conductive spacer member, said first conductive spacer member being supported on and substantially in axial alignment with said second stand-off insulator member, a third stand-off insulator member supported on and substantially in axial alignment of the said first stand-off insulator member, a second damping device supported at one end thereof by said third stand-off insulator member and at the opposite end thereof by said first conductive spacer member, the end of said first damping device opposite said one end of said first damping device being conductively connected to said opposite end of said second damping device through said first conductive spacer member, whereby to place said first and said second damping devices electrically in series with each other, and means adapted to connect said one end of said second damping device in circuit with said electrical transmission line, whereby said first and said second damping devices are connected in series with each other and are adapted tO be connected in circuit with the electrical transmission line.
Claim 35
Dependent Claim
293 words
An assembly of damping devices for attenuating high frequency transient phenomena for connection in circuit with an electrical transmission line, each damping device comprising an electrical conductor member extending lengthwise thereof, said assembly comprising a supporting frame member, stand-off insulator means supporting and spacing said frame member relative to a supporting surface, first and second stand-off insulator members positioned in longitudinally spaced relation to each other along said frame member, a first damping device supported contiguous the respective opposite ends thereof by said first and said second stand-off insulator members, means adapted to conductively connect one end of said first damping device in series with said electrical transmission line, said one end of said first damping device being supported by said first stand-off insulator member, a first conductive spacer member, said first conductive spacer member being supported on and substantially in axial alignment with said second stand-off insulator member, a third stand-off insulator member supported on and substantially in axial alignment of the said first stand-off insulator member, a second damping device supported at one end thereof by said third stand-off insulator member and at the opposite end thereof by said first conductive spacer member, the end of said first damping device opposite said one end of said first damping device being conductively connected to said opposite end of said second damping device through said first conductive spacer member, whereby to place said first and said second damping devices electrically in series with each other, and means adapted to connect said one end of said second damping device in circuit with said electrical transmission line, whereby said first and said second damping devices are connected in series with each other and are adapted tO be connected in circuit with the electrical transmission line.
Claim 36
Dependent Claim
71 words
An assembly of damping devices as defined in claim 21 in which said means adapted to connect said one end of said second damping device in circuit with said electrical transmission line comprises additional damping devices connected in series with said second damping device, the last of said additional damping devices being adapted to be connected to the transmission line, whereby to place said assembly in circuit with the transmission line.
Claim 37
Dependent Claim
62 words
An assembly of damping devices as defined in claim 21 in which the respective damping devices are of the type comprising a stack of magnetic laminations and a corresponding conductor member received in a slot in each respecitve stack, the conductor members of the plurality of damping devices being connected in series with each other and in circuit with the transmission line.
Claim 38
Dependent Claim
264 words
An assembly of damping devices for attenuating high frequency transient phenomena for connection in circuit with an electrical transmission line, said assembly comprising a supporting frame member, stand-off insulator means supporting and spacing said frame member relative to a supporting surface, and a stack of damping devices supported on said frame member in a plane substantially normal to said supporting surface, said stack comprising first and second stand-off insulator members positioned in longitudinally spaced relation to each other along said frame member, a first damping device supported in spaced relation to said frame member by said first and second stand-off insulator members, means adapted to conductively connect one end of said first damping device in circuit with the electrical transmission line, said stack comprising a plurality of additional damping devices each supported in said plane in stacked relation to said first damping device and to each other by a corresponding additional stand-off insulator at one end of each respective damping device and by a corresponding conductive spacer at an opposite end of each respective damping device, the relative position of the corresponding stand-off insulator and of the corresponding conductive spacer being reversed for successive damping devices in the said stack whereby each corresponding conductive spacer establishes a conductive connection between successive damping devices to place successive damping devices electrically in series with each other, and whereby to place the plurality of damping devices of the stack in series with each other, and means adapted to connect the terminal end of the last damping device in said stack in circuit with the electrical transmission line.
Claim 39
Dependent Claim
264 words
An assembly of damping devices for attenuating high frequency transient phenomena for connection in circuit with an electrical transmission line, said assembly comprising a supporting frame member, stand-off insulator means supporting and spacing said frame member relative to a supporting surface, and a stack of damping devices supported on said frame member in a plane substantially normal to said supporting surface, said stack comprising first and second stand-off insulator members positioned in longitudinally spaced relation to each other along said frame member, a first damping device supported in spaced relation to said frame member by said first and second stand-off insulator members, means adapted to conductively connect one end of said first damping device in circuit with the electrical transmission line, said stack comprising a plurality of additional damping devices each supported in said plane in stacked relation to said first damping device and to each other by a corresponding additional stand-off insulator at one end of each respective damping device and by a corresponding conductive spacer at an opposite end of each respective damping device, the relative position of the corresponding stand-off insulator and of the corresponding conductive spacer being reversed for successive damping devices in the said stack whereby each corresponding conductive spacer establishes a conductive connection between successive damping devices to place successive damping devices electrically in series with each other, and whereby to place the plurality of damping devices of the stack in series with each other, and means adapted to connect the terminal end of the last damping device in said stack in circuit with the electrical transmission line.
Claim 40
Dependent Claim
71 words
An assembly of damping devices as defined in claim 24 in which the means adapted to connect one end of the stack of damping devices in circuit with the electrical transmission line comprises at least one additional stack of damping devices as defined in claim 18 whereby to place said at least one additional stack of damping devices in series with said first-mentioned stack and in circuit with said transmission line.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |