Patents by Inventor Alexander L. Butler
Alexander L. Butler 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).
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Patent number: 10744532Abstract: An underwater acoustic transducer that is capable of radiating acoustic energy at low frequencies. A transducer which is a resonant low frequency bender-type transducer driven at its end supports by a piezoelectric stack of material operating with inner and outer parts driven in opposite directions creating a bending motion of a radiating beam, plate or disc. The small piezoelectric motions at the beam supports are magnified by the leveraged motion of the bending beam(s) creating significant output at low frequencies.Type: GrantFiled: May 4, 2017Date of Patent: August 18, 2020Assignee: Image Acoustics, Inc.Inventors: John L. Butler, Alexander L. Butler
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Patent number: 8659211Abstract: An electro-mechanical transducer is disclosed, which provides a very low frequency wide band response from a bender (or benders) using piezoelectric cantilevers or center mounted free edge disc, providing additive output between the resonant frequencies achieving this response at great depths under equivalent free flooded conditions with additionally improved response with silicone rubber to reduce the acoustic cancellation associated with the dipole mode of vibration of the bender.Type: GrantFiled: March 29, 2013Date of Patent: February 25, 2014Assignee: Image Acoustics, Inc.Inventors: John L. Butler, Alexander L. Butler
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Patent number: 8599648Abstract: A modal piezoelectric transducer that is constructed with at least three multi section piezoelectric structures to which a shell with equal concave or indentation sections is attached at the intersections of the piezoelectric structures providing magnified displacement to attached pistons and greater loading of the medium on to the piezoelectric structures producing greater output and a lower resonance frequency. A doubly steered array of steerable modal piezoelectric transducers is steered in the same direction as the array is steered.Type: GrantFiled: May 4, 2012Date of Patent: December 3, 2013Assignee: Image Acoustics, Inc.Inventors: John L. Butler, Alexander L. Butler
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Patent number: 8552625Abstract: An electro-mechanical transducer provides a very low frequency wide band response by using a quad configuration of piezoelectric cantilevers, providing additive output between the resonant frequencies of the cantilevers and achieves this at great depths under free flooded or oil filled conditions.Type: GrantFiled: September 25, 2012Date of Patent: October 8, 2013Assignee: Image Acoustics, Inc.Inventors: John L. Butler, Alexander L. Butler
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Patent number: 8072843Abstract: An electro-mechanical transducer is disclosed, which provides a wideband response by activating successive multiple resonant frequencies in a way which provides additive output between the resonant frequencies with reduced cancellation below the first resonance and means for controlling the response by reducing the voltage drive. A multiply resonant wideband high output transducer is disclosed.Type: GrantFiled: March 18, 2009Date of Patent: December 6, 2011Assignee: Image Acoustics, Inc.Inventors: John L. Butler, Alexander L. Butler
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Patent number: 7692363Abstract: An electro-mechanical transducer, which provides dipole motion from its housing which is driven by a bender transducer attached to the housing at the outer edge and attached to an inertial mass at its center providing a lower resonance frequency, lower mechanical Q and enhanced motion and acoustical source level.Type: GrantFiled: October 2, 2006Date of Patent: April 6, 2010Assignee: Image Acoustics, Inc.Inventors: Alexander L. Butler, John L. Butler
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Patent number: 7453186Abstract: An electromechanical transducer which provides orthogonal translated motion to a piston through an attached lever arm connected to and driven by at least two electromechanical cantilever members, mounted on a separate inertial tail mass, and which under full array loading conditions provide a reduced resonance frequency that yields velocity control in the vicinity of that resonance.Type: GrantFiled: October 17, 2007Date of Patent: November 18, 2008Assignee: Image Acoustics, IncInventors: Alexander L. Butler, John L. Butler
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Patent number: 7372776Abstract: A transduction apparatus, which employs an array of individual transducers that generates multiple acoustic radiation modes, is described. These modes are used together to yield directional steered beam patterns. In one embodiment separate transducers, clustered in the form of a ring array, are used together to generate wide and narrow cardioid type beam patterns through combined monopole, dipole and quadrupole radiation modes in the medium, along with at least one tail mass.Type: GrantFiled: February 23, 2006Date of Patent: May 13, 2008Assignee: Image Acoustics, Inc.Inventors: Alexander L. Butler, John L. Butler
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Publication number: 20080079331Abstract: An electromechanical transducer, which provides dipole motion from its housing which is driven by a bender transducer attached to the housing at the outer edge and attached to an inertial mass at its center providing a lower resonance frequency, lower mechanical Q and enhanced motion and acoustical source level.Type: ApplicationFiled: October 2, 2006Publication date: April 3, 2008Inventors: Alexander L. Butler, John L. Butler
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Patent number: 7292503Abstract: An electro-mechanical transducer, which provides radial amplified multiple piston motion is formed from attached multiple lever arms and multiple electro-mechanical drivers. The piston motion is amplified by lever arms, which are attached to electro-mechanical drivers, such as piezoelectric or magnetostrictive drivers, which oscillate in a radial direction in unison with the applied voltage. A minimum of three pistons, three lever arms (or shells) and three drivers may be used. A preferred embodiment, uses four pistons, four lever arms (or shells) and four drivers. As a result of both the magnified motion of the lever arms (or shells) and the large acoustic radiating area of the multiple pistons, the transducer provides a means for a high-source level from a compact low-frequency broadband transducer.Type: GrantFiled: May 3, 2004Date of Patent: November 6, 2007Assignee: Image Acoustics, Inc.Inventors: Alexander L. Butler, John L. Butler
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Patent number: 6950373Abstract: An electro-mechanical transducer is disclosed, which provides a wideband response by activating successive multiple resonant frequencies in a way which provides additive output between the resonant frequencies. A three mode wideband high output transducer is also disclosed along with an electro-mechanical feedback system which provides a smoothed response as well as array control under multiple element usage.Type: GrantFiled: May 16, 2003Date of Patent: September 27, 2005Assignee: Image Acoustics, Inc.Inventors: Alexander L. Butler, John L. Butler
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Publication number: 20040228216Abstract: An electro-mechanical transducer is disclosed, which provides a wideband response by activating successive multiple resonant frequencies in a way which provides additive output between the resonant frequencies. A three mode wideband high output transducer is also disclosed along with an electro-mechanical feedback system which provides a smoothed response as well as array control under multiple element usage.Type: ApplicationFiled: May 16, 2003Publication date: November 18, 2004Inventors: Alexander L. Butler, John L. Butler
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Patent number: 6734604Abstract: An electro-mechanical transducer, which provides beam patterns synthesized from the vibration modes of the transducer. A preferred form of the transducer is a short piezoelectric tube or ring with separate electrodes spaced around the ring for specific excitation of the monopole, dipole and quadrupole modes of vibration. Operation of the transducer in the region between the dipole and quadrupole modes yields a system with a nearly constant beam pattern and transmitting response. The arrangement allows a simple directional steered beam pattern from a single transducer.Type: GrantFiled: June 5, 2002Date of Patent: May 11, 2004Assignee: Image Acoustics, Inc.Inventors: John L. Butler, Alexander L. Butler
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Publication number: 20030227826Abstract: An electro-mechanical transducer, which provides beam patterns synthesized from the vibration modes of the transducer. A preferred form of the transducer is a short piezoelectric tube or ring with separate electrodes spaced around the ring for specific excitation of the monopole, dipole and quadrupole modes of vibration. Operation of the transducer in the region between the dipole and quadrupole modes yields a system with a nearly constant beam pattern and transmitting response. The arrangement allows a simple directional steered beam pattern from a single transducer.Type: ApplicationFiled: June 5, 2002Publication date: December 11, 2003Applicant: Image Acoustics, Inc.Inventors: John . Butler, Alexander L. Butler
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Patent number: 6654316Abstract: An electro-mechanical transducer, which provides amplified piston motion from an orthogonal drive direction wherein the electro-mechanical drive additionally provides the inertial reactive mass for the moving mass of the piston. The piston motion is amplified by lever arms, which are typically attached to a piezoelectric or electrostrictive drive system. The arrangement allows a compact, high output transducer design.Type: GrantFiled: May 3, 2002Date of Patent: November 25, 2003Inventors: John L. Butler, Alexander L. Butler
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Publication number: 20030206490Abstract: An electro-mechanical transducer, which provides amplified piston motion from an orthogonal drive direction wherein the electro-mechanical drive additionally provides the inertial reactive mass for the moving mass of the piston. The piston motion is amplified by lever arms, which are typically attached to a piezoelectric or electrostrictive drive system. The arrangement allows a compact, high output transducer design.Type: ApplicationFiled: May 3, 2002Publication date: November 6, 2003Applicant: Image Acoustics, Inc.Inventors: John L. Butler, Alexander L. Butler