Attenuation of electromagnetic noise including a permanent magnet
First Claim
1. An electronic noise attenuator for use with an electrical conductor cable for an electronic device, comprising:
- (a) a case defining an elongate cable-receiving passageway including a passageway axis;
(b) at least one permanently magnetized magnet located within said case adjacent said cable-receiving passageway, each said magnet having a pair of ends and each of said ends including a respective one of a pair of magnetic poles defining a linear axis of polarity of a respective said magnet extending parallel with said passageway axis; and
(c) a tubular shield of ferromagnetic material extending at least partially around said at least one magnet and said passageway and extending beyond said at least one magnet toward said cable-receiving passageway.
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Accused Products
Abstract
A device and a method for its use to attenuate electromagnetic noise, such as that caused in power supply line current by back-emf from devices being powered, in order to provide cleaner, or more regular alternating current and voltage waveforms. A permanently magnetized magnet is held close to a conductor cable for an alternating current, in a case, which may also hold a permeable material extending from the magnet and at least partly surrounding the cable. Multiple magnets may be included, arranged parallel with each other and with like poles adjacent or facing each other, forming a tubular arrangement about the cable.
21 Citations
10 Claims
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1. An electronic noise attenuator for use with an electrical conductor cable for an electronic device, comprising:
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(a) a case defining an elongate cable-receiving passageway including a passageway axis;
(b) at least one permanently magnetized magnet located within said case adjacent said cable-receiving passageway, each said magnet having a pair of ends and each of said ends including a respective one of a pair of magnetic poles defining a linear axis of polarity of a respective said magnet extending parallel with said passageway axis; and
(c) a tubular shield of ferromagnetic material extending at least partially around said at least one magnet and said passageway and extending beyond said at least one magnet toward said cable-receiving passageway. - View Dependent Claims (2, 3, 4)
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5. An electronic noise attenuator for use with an electrical conductor cable of an electronic device, comprising:
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(a) a case defining cable-receiving passageway;
(b) at least one permanently magnetized magnet located within said case adjacent said cable-receiving passageway; and
(c) a unitary body of electrically conductive magnetically permeable ferromagnetic material contained within said case in proximity with said permanently magnetized magnet, said ferromagnetic material extending partially around said magnet and around at least a portion of said cable-receiving passageway.
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6. An electronic noise attenuator for use with an electrical conductor cable of an electronic device, comprising:
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(a) a case defining cable-receiving passageway, said case having a connected mating pair of similar halves each partially defining said cable-receiving passageway;
(b) each of said halves containing respectively at least one permanently magnetized magnet located within said case adjacent said cable-receiving passageway; and
(c) a body of magnetically permeable ferromagnetic material contained within said case in proximity with said permanently magnetized magnet, said body of magnetically permeable ferromagnetic material including a pair of shield members each housed in a respective one of said halves of said case, said shield members being aligned opposite each other, with each said permanently magnetized magnet being located between a respective one of said shield members and said cable-receiving passageway and said ferromagnetic material extending partially around said magnet and around at least a portion of said cable-receiving passageway, each said shield member being magnetically attached to a respective one of said permanently magnetized magnets and said permanently magnetized magnets being oriented so as to repel each other.
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7. An electronic noise attenuator for use with an electrical conductor cable of an electronic device, comprising:
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(a) a case defining cable-receiving passageway, said case having a connected mating pair of similar halves each partially defining said cable-receiving passageway;
(b) each of said halves containing respectively at least one permanently magnetized magnet located within said case adjacent said cable-receiving passageway; and
(c) a body of magnetically permeable ferromagnetic material contained within said case in proximity with said permanently magnetized magnet, said body of magnetically permeable ferromagnetic material including a pair of shield members each housed in a respective one of said halves of said case, said shield members being aligned opposite each other, with each said permanently magnetized magnet being located between a respective one of said shield members and said cable-receiving passageway and said ferromagnetic material extending partially around said magnet and around at least a portion of said cable-receiving passageway, and said halves of said case being interconnected with each other by a plurality of threaded fasteners.
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8. An electronic noise attenuator for use with an electrical conductor cable of an electronic device, comprising:
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(a) a case defining cable-receiving passageway, said case having a connected mating pair of similar halves each partially defining said cable-receiving passageway;
(b) each of said halves containing respectively at least one permanently magnetized magnet located within said case adjacent said cable-receiving passageway; and
(c) a body of magnetically permeable ferromagnetic material contained within said case in proximity with said permanently magnetized magnet, said body of magnetically permeable ferromagnetic material including a pair of shield members each housed in a respective one of said halves of said case, said shield members being aligned opposite each other, with each said permanently magnetized magnet being located between a respective one of said shield members and said cable-receiving passageway and said ferromagnetic material extending partially around said magnet and around at least a portion of said cable-receiving passageway, said shield members being of sheet steel thick enough and permeable enough not to be saturated magnetically by said permanently magnetized magnet. - View Dependent Claims (9, 10)
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Specification