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).

  • Publication number: 20040252007
    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: November 14, 2002
    Publication date: December 16, 2004
    Inventors: David Lussey, Dianne Jones, Steven Leftly
  • Publication number: 20040217331
    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 characterised 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: Application
    Filed: December 5, 2003
    Publication date: November 4, 2004
    Inventors: David Lussey, David Bloor, Paul Jonathan Laughlin, Philip James Walton Hands
  • Patent number: 6646540
    Abstract: A conductive structure is used in electric variable resistance devices to provide changes in electrical resistance with movement and changes in pressure, the variable resistance device comprising externally connectable electrodes (10) bridged by an element (14) containing polymer and particles of metal, alloy or reduced metal oxide, said element (14) having a first level of conductance when quiescent and being convertible to a second level of conductance by change of stress applied by stretching or compression or electric field, the device further comprising by means (18) to stress the element (14) over a cross-sectional area proportional to the level of conductance required.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: November 11, 2003
    Assignee: Peratech Limited
    Inventor: David Lussey
  • Patent number: 6495069
    Abstract: A polymer composition comprises at least one substantially non-conductive polymer and at least one electrically conductive filler and in the form of granules, the granules preferably being in the size range up to 1 mm and more preferably between 0.04 mm and 0.2 mm, with the volume ratio of conductor to polymer preferably being at least 3:1.
    Type: Grant
    Filed: July 24, 2000
    Date of Patent: December 17, 2002
    Assignee: Peratech Limited of a Company of Great Britain and Northern Ireland
    Inventors: David Lussey, Andrew Brian King, Christopher John Lussey
  • Patent number: 6291568
    Abstract: A polymer composition is elastically deformable from a quiescent state. The composition includes at least one electrically conductive filler dispersed within and encapsulated by a non-conductive elastomer, the nature and concentration of the filler being such that the electrical resistivity of the composition is variable in response to distortion forces down to a value substantially equal to that of the conductor bridges of the filler. The composition further includes a modifier which, on release of the distortion forces, accelerates the elastic return of the composition to its quiescent state.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: September 18, 2001
    Assignee: Peratech Limited of a Company of Great Britain and Northern Ireland
    Inventor: David Lussey
  • Patent number: 5541578
    Abstract: A tamper detection sensor comprises an insulating substrate (2) to one side of which are applied electrically isolated strips (4) of an electrically conductive material, an electrically conductive bride member (8) interconnecting the strips (4) and secured to the strips (4) by an electrically conductive adhesive (10), and a layer (12) of electrically non-conductive adhesive applied to the one side of the substrate (2) to encase the conductive strips (4) and the bridge member (8) and by which the sensor can be secured to an item (14) to be protected. On relative movement between the substrate (2) and the layer (12) of non-conductive adhesive, the conductive adhesive (10) is deformed whereby the electrical resistance thereof is altered, this alteration in resistance being detected by an electronic monitor (18) connected to the sensor to provide an indication of the relative movement and therefore of tampering with the sensor.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: July 30, 1996
    Inventor: David Lussey