Electrically conductive composition
OwnerDavid Lusseyinventor
Life of this patent
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Abstract
A pressure sensitive electrically conductive composition comprises a contained quantity of magnetite particles, wherein the quantity of magnetite particles includes a distribution of particle sizes between sub-micron and tens of microns, and wherein the magnetite particles have a plurality of planar faces, adjacent planar faces connected at a vertex, the particles each having a plurality of vertices wherein the magnetite particles are irregular in shape and have a low aspect ratio.
Claims19
An electrically anisotropic pressure sensitive composition, the composition composed of a contained quantity of electrically conductive particles including first electrically conductive particles, which first electrically conductive particles are magnetite particles, wherein the quantity of magnetite particles includes a distribution of particle sizes between sub-micron and tens of microns, and wherein the magnetite particles have a plurality of planar faces, adjacent planar faces connected at a vertex, the particles each having a plurality of vertices wherein the magnetite particles are irregular in shape, the resistance of the electrically conductive composition changing in accordance with the pressure exerted thereon, the resistance reducing with increased applied pressure and increasing with reduced applied pressure, and wherein the electrically conductive particles are contained without a binder in a selected one of the following manners:
- between two elements;
- two spaced apart plates;
- in a yarn;
- in interstices within a fabric, in pockets in a fabric;
- and between fabric layers.
A sensor comprising two layers of semi-conductor separated by an electrically anisotropic layer the electrically anisotropic layer comprising an electrically anisotropic pressure sensitive composition, the composition composed of a contained quantity of electrically conductive particles including first electrically conductive particles, which first electrically conductive particles are magnetite particles, wherein the quantity of magnetite particles includes a distribution of particle sizes between sub-micron and tens of microns, and wherein the magnetite particles have a plurality of planar faces, adjacent planar faces connected at a vertex, the particles each having a plurality of vertices wherein the magnetite particles are irregular in shape, the resistance of the electrically conductive composition changing in accordance with the pressure exerted thereon, the resistance reducing with increased applied pressure and increasing with reduced applied pressure, and wherein the electrically conductive particles are contained without a binder in a selected one of the following manners:
- between two elements;
- two spaced apart plates;
- in a yarn;
- in interstices within a fabric, in pockets in a fabric;
- and between fabric layers, each layer of semi-conductor having at least one electrode attached thereto and wherein the at least one electrode of one layer of semi-conductor is arranged orthogonal to the at least one electrodes of the other layer of semi-conductor.
Dependencies are inferred from the claim text.