Patent GB-458505-A (GB)
Title: Improvements in and relating to the conduction of high frequency electric fields
IPC: H01B11/12
Filed: 1935-04-17
Abstract: In high-frequency apparatus, the concentration or conduction of the high frequency electric field is effected by means of a material composed of finely divided non-magnetic conducting material e.g. aluminium dust or colloidal graphite dispersed in a dielectric material, e.g. a synthetic resin, with a greater proportion by weight of the conducting material.  In an example, two parts by volume of aluminium powder are dispersed in one part of synthetic resin.  In a modification, a mixture of finely divided magnetic and non-magnetic material is dispersed in the dielectric material.  The material may be made non-homoeneous. Specification 407,602, [Group XL], is referred to.  Reference has been directed by the Comptroller to Specification 446,660, [Group VI].ALSO:In high-frequency apparatus, the concentration or conduction of the high-frequency electric field is effected by means of a material composed of finely divided non-magnetic conducting material dispersed in a dielectric material, with a greater proportion, by weight of the conducting material.  The conducting material may be aluminium dust or colloidal graphite.  The dielectric material may be a synthetic resin, solid paraffin, or a liquid.  In an example, two parts by volume of aluminium powder are dispersed in one part of a synthetic resin or in paraffin. The material may be used in all cases where it is desired to concentrate or conduct a high-frequency electric field.  It may be used in the form of rods, tubes or blocks for the construction of coils, conducting leads, condensers, &c.  In high-frequency therapy, shaped electrodes of the material may be placed between the normal electrodes and the part of the body to be treated.  In a modification, a mixture of finely divided magnetic and non-magnetic conducting material is dispersed in the dielectric material.  The magnetic material may be iron dust or Heussler alloy.  A body of the material resonates at a certain frequency and may be used for tuning purposes in wireless receiving and transmitting apparatus.  The natural frequency may be adjusted by auxiliary variable condensers or inductances or tuning may be effected by employing two bodies of different magnetic properties and an electrode whereby a greater or lesser part of the materials may be employed.  Tuning may also be effected by using a single block of the material in conjunction with a movable electrode. The material may be made non-homogeneous. Specification 407,602 is referred to.  Reference has been directed by the Comptroller to Specification 446,660, [Group VI]. p ALSO:In high-frequency apparatus, the concentration or conduction of the high-frequency electric field is effected by means of a p  material composed of finely divided non-magnetic conducting material dispersed in a dielectric material, with a greater proportion by weight of the conducting material.  The conducting material may be aluminium dust or colloidal graphite.  The dielectric material may be a synthetic resin, solid paraffin or a liquid.  In an example, two parts by volume of aluminium powder are dispersed in one part of a synthetic resin or in paraffin. The material may be used in high-frequency therapy, shaped electrodes of the material being placed between the normal electrodes and the part of the body to be treated. Specification 407,602, [Group XL], is referred to.  Reference has been directed by the Comptroller to Specification 446,660.