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An improved apparatus for magnetically filtering a magnetically susceptible component in a fluid with a matrix of magnetizable material which, when magnetized, provides a multiplicity of regions of high magnetic field gradient. A sequence of time-spaced impulsive magnetic fluxes are produced in an e

An improved apparatus for magnetically filtering a magnetically susceptible component in a fluid with a matrix of magnetizable material which, when magnetized, provides a multiplicity of regions of high magnetic field gradient. A sequence of time-spaced impulsive magnetic fluxes are produced in an electromagnetic coil by periodically charging and discharging capacitor connected to the coil, the fluxes being concentrated across the magnetic matrix to magnetically collect the magnetically susceptible component in the regions of high field gradient therein. A static magnetic flux may also be provided in the magnetic matrix by a permanent magnet included in a magnetic circuit with the matrix.

대표청구항 ▼

An apparatus for filtering a magnetically susceptible substance in a fluid, comprising: a matrix of magnetizable material which, when magnetized, provides a multiplicity of regions of high magnetic field gradients and which is received in an enclosure; means for passing said fluid through said matri

An apparatus for filtering a magnetically susceptible substance in a fluid, comprising: a matrix of magnetizable material which, when magnetized, provides a multiplicity of regions of high magnetic field gradients and which is received in an enclosure; means for passing said fluid through said matrix in said enclosure; external magnetic circuit means for magnetizing said matrix to magnetically collect said magnetically susceptible substance from said fluid, said magnetic circuit means including a field generating coil and a magnetic conductor arranged to form a closed magnetic circuit with said matrix and with said field generating coil; power supply means for passing a succession of electrical impulses through said field generating coil to intermittently energize the same, thereby producing a sequence of impulsive magnetic fluxes in said magnetic circuit to recurrently intensify magnetization of said matrix, said power supply means comprising a capacitor chargeable from a direct-current source and connected via switch means with said coil so as to be dischareable through said coil each time said switch means is rendered conductive to produce in said coil each said electrical impulse having a magnitude sufficient to increase said magnetic field gradients in said matrix; and at least one hard or semi-hard magnet arranged in series with said matrix in said magnetic circuit for producing a generally static magnetic flux therein sufficient to maintain said matrix magnetized each time said electric impulse passing through said field generating coil decays. The apparatus defined in claim 1 wherein said switch means is associated with timing circuit means for periodically rendering it conductive to develop a succession of said electrical impulses in said coil.