Patents by Inventor Andrew Marchant

Andrew Marchant 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).

  • Bending wave acoustic device and method of making thereof
    Patent number: 8391540
    Abstract: An acoustic device and method of making said acoustic device. The acoustic device comprises a diaphragm having resonant bending wave modes in the operating frequency range, and a plurality of electromechanical transducers coupled to the diaphragm. The positioning and mechanical impedance of the transducers are such that at least a selected number of the resonant bending wave modes are balanced so that the net transverse modal velocity over the area of the diaphragm tends to zero with the balancing of the resonant bending wave modes being achieved substantially by the positioning and mechanical impedance of the transducers. The parameters of the diaphragm may be such that there are a plurality of nodal grouped locations at or around which the nodal lines of a selected number of resonant modes are clustered. Each transducer may be mounted at one of the plurality of nodal grouped locations.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: March 5, 2013
    Assignee: New Transducers Limited
    Inventors: David Keith Berriman, Christien Ellis, Martin Colloms, Graham Bank, Neil John Harris, Douglas Andrew Marchant
  • Bending Wave Acoustic Device and Method of Making Thereof
    Publication number: 20090290732
    Abstract: An acoustic device and method of making said acoustic device. The acoustic device comprises a diaphragm having resonant bending wave modes in the operating frequency range, and a plurality of electromechanical transducers coupled to the diaphragm. The positioning and mechanical impedance of the transducers are such that at least a selected number of the resonant bending wave modes are balanced so that the net transverse modal velocity over the area of the diaphragm tends to zero with the balancing of the resonant bending wave modes being achieved substantially by the positioning and mechanical impedance of the transducers. The parameters of the diaphragm may be such that there are a plurality of nodal grouped locations at or around which the nodal lines of a selected number of resonant modes are clustered. Each transducer may be mounted at one of the plurality of nodal grouped locations.
    Type: Application
    Filed: January 18, 2007
    Publication date: November 26, 2009
    Inventors: Keith David Berriman, Christien Ellis, Martin Colloms, Graham Bank, John Neil Harris, Douglas Andrew Marchant
  • Acoustic device
    Patent number: 7564984
    Abstract: A bending wave loudspeaker having an operating frequency range and a coincidence frequency which is above the operating frequency range, comprising a resonant panel having two generally orthogonal axes, vibration exciting means coupled to the panel to excite the panel into resonance along the one axis of the panel, and means restraining or preventing resonance along the other axis of the panel whereby the panel radiates an acoustic output which is of wide directivity along the one axis and of narrow directivity along the other axis of the panel.
    Type: Grant
    Filed: July 13, 2004
    Date of Patent: July 21, 2009
    Assignee: New Transducers Limited
    Inventors: Graham Bank, Andrew Marchant, Martin Colloms, Paul Burton
  • Acoustic device
    Publication number: 20060227983
    Abstract: A bending wave loudspeaker having an operating frequency range and a coincidence frequency which is above the operating frequency range, comprising a resonant panel having two generally orthogonal axes, vibration exciting means coupled to the panel to excite the panel into resonance along the one axis of the panel, and means restraining or preventing resonance along the other axis of the panel whereby the panel radiates an acoustic output which is of wide directivity along the one axis and of narrow directivity along the other axis of the panel.
    Type: Application
    Filed: July 13, 2004
    Publication date: October 12, 2006
    Inventors: Graham Bank, Andrew Marchant, Martin Colloms, Paul Borton