Patents by Inventor David Lussey

David Lussey has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10818406
    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.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: October 27, 2020
    Inventor: David Lussey
  • Publication number: 20200217810
    Abstract: An electrical charge storage medium comprises a quantity of first electrically conductive particles contained in a non conductive binder (for example polyurethane). The first electrically conductive particles are magnetite particles. The quantity of magnetite particles includes a distribution of particle sizes between sub-micron and tens of microns, and the magnetite particles have a plurality of planar faces, adjacent planar faces connected at a vertex. The particles each have a plurality of vertices. The magnetite particles are irregular in shape and have a low aspect ratio. Electrical charge storage medium is applied to a non-conductive substrate and contacted by two spaced apart electrodes to sense the change in resistance upon intercation with a volatile organic compound.
    Type: Application
    Filed: December 27, 2017
    Publication date: July 9, 2020
    Inventor: DAVID LUSSEY
  • Publication number: 20190362866
    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.
    Type: Application
    Filed: December 15, 2016
    Publication date: November 28, 2019
    Inventor: DAVID LUSSEY
  • Publication number: 20180186965
    Abstract: A polymer composition comprises at least one substantially non-conductive polymer binder and at least first and second electrically conductive fillers, wherein the first electrically conductive filler is comprised of particles having a void bearing structure, and the second electrically conductive filler is comprised of particles which are substantially spherical in shape.
    Type: Application
    Filed: June 27, 2016
    Publication date: July 5, 2018
    Inventor: David LUSSEY
  • Patent number: 9546859
    Abstract: An electrically responsive composite material (1110) specially adapted for touch screen, comprising a carrier layer (1301) having a length and a width and a thickness (1303) that is relatively small compared to said length and said width. The composite material also comprises a plurality of electrically conductive or semi-conductive particles (201). The particles (201) are agglomerated to form a plurality of agglomerates (104, 1403) dispersed within the carrier layer such that each said agglomerate comprises a plurality of the particles (201). The agglomerates are arranged to provide electrical conduction across the thickness of the carrier layer in response to applied pressure such that the electrically responsive composite material has a resistance that reduces in response to applied pressure.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: January 17, 2017
    Assignee: Peratech Holdco Limited
    Inventors: Christopher John Lussey, Paul Jonathan Laughlin, Adam Graham, David Bloor, David Lussey
  • Patent number: 9442594
    Abstract: A sensor is configured to experience resistance changes in response to an external interaction. The sensor comprises a first layer of a conductive material having a first electrode connected thereto; a second intermediate layer of a material having a resistance sensitive to said external interaction; and a third layer including a first set of fingers interdigitated with a second set of fingers. A second electrode is attached to the first set of fingers and a third electrode is attached to the second set of fingers. The second layer includes a quantum tunnelling composite and provides electrical conduction between the first layer and the third layer. In a preferred embodiment, the first electrode is connected to either one of said second electrode or said third electrode to complete a parallel connection. A method is described for constructing such a sensor.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: September 13, 2016
    Assignee: Peratech Holdco Limited
    Inventors: Mark Andrew Graham, David Lussey
  • Patent number: 9182845
    Abstract: A sensor for, and a method of, generating electrical signals indicating a positional property and an extent property of a mechanical interaction within a sensing zone. The sensor comprises a plurality of conductive layers. At least one conductive layer is a pressure-sensitive conductive layer comprising a quantum tunnelling conductance (qtc) material. Contact between conductive layers is allowed during the absence of a mechanical interaction within said sensing zone. The sensor may be configured to provide a three-terminal sensing functionality or a four-terminal sensing functionality. The sensing zone may be substantially two-dimensional or substantially three-dimensional. The sensor may be substantially flexible or substantially rigid.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: November 10, 2015
    Assignee: Peratech Holdco Limited
    Inventors: David Lussey, Mark Andrew Graham
  • Patent number: 8803536
    Abstract: A detector comprising control circuitry and a sensor in which the detector comprises three layers. The first layer includes a first set of mutually connected electrically conducting elements and a second set of mutually connected electrically conducting elements. The third layer comprises an electrically conducting plane, and the second layer extends between the first and third layers. The electrical conductivity of the second layer varies in accordance with variations in the intensity of the interactions. In a first mode, the control circuit applies voltage between the first and third layers to generate a first current through the second layer, and provides a measurement of the first current. In a second mode, the control circuit applies voltage between the first and second sets of electrically conducting elements to generate a second current through the second layer, and provides a measurement of the second current.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: August 12, 2014
    Assignee: Peratech Limited
    Inventors: Mark Andrew Graham, David Lussey
  • Patent number: 8765027
    Abstract: A polymer composition comprises at least one substantially non-conductive polymer binder and at least first and second electrically conductive fillers. The first electrically conductive filler is comprised of particles having avoid-bearing structure; and the second electrically conductive filler is comprised of particles which are acicular in shape.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: July 1, 2014
    Assignee: Peratech Limited
    Inventors: David Lussey, David Bloor, Paul Laughlin, Cyril Hilsum
  • Publication number: 20140109698
    Abstract: An electrically responsive composite material (1110) specially adapted for touch screen, comprising a carrier layer (1301) having a length and a width and a thickness (1303) that is relatively small compared to said length and said width. The composite material also comprises a plurality of electrically conductive or semi-conductive particles (201). The particles (201) are agglomerated to form a plurality of agglomerates (104, 1403) dispersed within the carrier layer such that each said agglomerate comprises a plurality of the particles (201). The agglomerates are arranged to provide electrical conduction across the thickness of the carrier layer in response to applied pressure such that the electrically responsive composite material has a resistance that reduces in response to applied pressure.
    Type: Application
    Filed: March 22, 2012
    Publication date: April 24, 2014
    Applicant: PERATECH LIMITED
    Inventors: Christopher John Lussey, Paul Jonathan Laughlin, Adam Graham, David Bloor, David Lussey
  • Patent number: 8449974
    Abstract: An electrically responsive composite material is disclosed, along with a method of producing an electrically responsive composite material, a transducer having a substrate for supporting a flowable polymer liquid and a method of fabricating a transducer. The electrically responsive composite material produced is configurable for application in a transducer. The method includes the steps of receiving the flowable polymer liquid and introducing electrically conductive acicular particles (1501, 1502) to facilitate the conduction of electricity by quantum tunneling. Dielectric particles (1505, 1506) are added of a size relative to the acicular particles such that a plurality of these dielectric particles are dispersed between adjacent acicular particles.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: May 28, 2013
    Assignee: Peratech Limited
    Inventors: David Lussey, David Bloor, Paul Jonathan Laughlin, Adam Graham, Cyril Hilsum
  • Publication number: 20120120009
    Abstract: A sensor for, and a method of, generating electrical signals indicating a positional property and an extent property of a mechanical interaction within a sensing zone. The sensor comprises a plurality of conductive layers. At least one conductive layer is a pressure-sensitive conductive layer comprising a quantum tunnelling conductance (qtc) material. Contact between conductive layers is allowed during the absence of a mechanical interaction within said sensing zone. The sensor may be configured to provide a three-terminal sensing functionality or a four-terminal sensing functionality. The sensing zone may be substantially two-dimensional or substantially three-dimensional. The sensor may be substantially flexible or substantially rigid.
    Type: Application
    Filed: March 24, 2010
    Publication date: May 17, 2012
    Applicant: PERATECH LIMITED
    Inventors: David Lussey, Mark Andrew Graham
  • Publication number: 20120074970
    Abstract: A sensor configured to experience resistance changes in response to an external interaction is disclosed. The sensor comprises a first layer of a conductive material having a first electrode connected thereto; a second intermediate layer of a material having a resistance sensitive to said external interaction; and a third layer consisting of a first set of fingers interdigitated with a second set of fingers. The first set of fingers has a second electrode attached thereto whilst the second set of fingers has a third electrode attached thereto. The second layer comprises a layer formed of a quantum tunnelling composite. In a preferred embodiment, the first electrode is connected to one of said second electrode or said third electrode to make a parallel connection. A method for constructing such a sensing device for sensing an external interaction is also disclosed.
    Type: Application
    Filed: September 28, 2011
    Publication date: March 29, 2012
    Applicant: PERATECH LIMITED
    Inventors: Mark Andrew Graham, David Lussey
  • Publication number: 20120074966
    Abstract: A detector comprising control circuitry and a sensor, responsive to interactions of varying intensities, comprising three layers. The first layer includes a first set of mutually connected electrically conducting elements and a second set of mutually connected electrically conducting elements. The third layer comprises an electrically conducting plane, and the second layer extends between the first and third layers. The electrical conductivity of the second layer varies in accordance with variations in the intensity of the interactions. In a first mode, the control circuit applies voltage between the first and third layers to generate a first current through the second layer, and provides a measurement of the first current. In a second mode, the control circuit applies voltage between the first and second sets of electrically conducting elements to generate a second current through the second layer, and provides a measurement of the second current.
    Type: Application
    Filed: September 28, 2011
    Publication date: March 29, 2012
    Applicant: PERATECH LIMITED
    Inventors: Mark Andrew Graham, David Lussey
  • Publication number: 20110253948
    Abstract: A polymer composition comprises at least one substantially non-conductive polymer binder and at least first and second electrically conductive fillers. The first electrically conductive filler is comprised of particles having avoid-bearing structure; and the second electrically conductive filler is comprised of particles which are acicular in shape.
    Type: Application
    Filed: May 2, 2008
    Publication date: October 20, 2011
    Applicant: PERATECH LIMITED
    Inventors: David Lussey, David Bloor, Paul Laughlin, Cyril Hilsum
  • Publication number: 20100062148
    Abstract: An electrically responsive composite material is disclosed, along with a method of producing an electrically responsive composite material, a transducer having a substrate for supporting a flowable polymer liquid and a method of fabricating a transducer. The electrically responsive composite material produced is configurable for application in a transducer. The method includes the steps of receiving the flowable polymer liquid and introducing electrically conductive acicular particles (1501, 1502) to facilitate the conduction of electricity by quantum tunneling. Dielectric particles (1505, 1506) are added of a size relative to the acicular particles such that a plurality of these dielectric particles are dispersed between adjacent acicular particles.
    Type: Application
    Filed: August 26, 2009
    Publication date: March 11, 2010
    Applicant: PERATECH LIMITED
    Inventors: David Lussey, David Bloor, Paul Jonathan Laughlin, Adam Graham, Cyril Hilsum
  • Patent number: 7301435
    Abstract: An electronic resistor user interface comprises flexible conductive materials and a flexible variably resistive element capable of exhibiting a change in electrical resistance on mechanical deformation and is characterised by textile-form electrodes (10,12), a textile form variably resistive element (14) and textile-form members (16) connective to external circuitry.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: November 27, 2007
    Assignee: Peratech Limited
    Inventors: David Lussey, Dianne Jones, Steven Leftly
  • Patent number: 7186356
    Abstract: A sensor for chemical species or biological species or radiation presenting to test fluid a polymer composition comprises polymer and conductive filler metal, alloy or reduced metal oxide and having a first level of electrical conductance when quiescent and being convertible to a second level of conductance by change of stress applied by stretching or compression or electric field, in which the polymer composition is characterized by at least one of the features in the form of particles at least 90% w/w held on a 100 mesh sieve; and/or comprising a permeable body extending across a channel of fluid flow; and/or affording in-and-out diffusion of test fluid and/or mechanically coupled to a workpiece of polymer swellable by a constituent of test fluid.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: March 6, 2007
    Assignee: Peratech Ltd.
    Inventors: David Lussey, David Bloor, Paul Jonathan Laughlin, Philip James Walton Hands
  • Patent number: 7145432
    Abstract: An electronic resistor user interface comprises flexible conductive materials and a flexible variably resistive element capable of exhibiting a change in electrical resistance on mechanical deformation and is characterised by textile-form electrodes (10,12) a textile form variably resistive element (14) and textile-form members (16) connective to external circuitry.
    Type: Grant
    Filed: May 17, 2001
    Date of Patent: December 5, 2006
    Assignees: Canesis Network Ltd., Peratech Limited
    Inventors: David Lussey, Dianne Jones, Steven Leftly
  • Publication number: 20060255903
    Abstract: An electronic resistor user interface comprises flexible conductive materials and a flexible variably resistive element capable of exhibiting a change in electrical resistance on mechanical deformation and is characterised by textile-form electrodes (10,12), a textile form variably resistive element (14) and textile-form members (16) connective to external circuitry.
    Type: Application
    Filed: July 20, 2006
    Publication date: November 16, 2006
    Applicants: Peratech Ltd., Canesis Network Ltd., Wool Research Organisation of New Zealand
    Inventors: David Lussey, Dianne Jones, Steven Leftly