Joseph Paul Clark

US Patent:

6570819, May 27, 2003

Filed:

Mar 8, 2002

Appl. No.:

10/092689

Inventors:

Joseph A. Clark - Arlington VA
Jane Ann Young - Rockville MD

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01V 104

US Classification:

367142, 181113, 181120

Abstract:

A reusable low frequency projector system that is capable of producing coherent broadband, high power, low frequency acoustic pressure waves underwater. The projector has two halves each with a spiral wound insulated wire core. The spiral wound wires are separately encapsulated and then joined flexibly in a contiguous parallel orientation. When energized by a voltage source the encapsulated spiral wound wires are repelled from one another and then come back together when not energized, imparting a pressure wave to the water at a desired frequency. The projector requires no pressure compensation devices for operation.

US Patent:

H002119, Jun 7, 2005

Filed:

Nov 17, 1997

Appl. No.:

08/971839

Inventors:

Joseph A. Clark - Arlington VA, US
Jane A. Young - Rockville MD, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

C12N013/00

US Classification:

4351735, 219215

Abstract:

Biological agents in solution within an underwater treatment zone are transferred by infusion to living cells under an acoustic energy field of limited duration and certain accompanying water flow and temperature conditions to maximize processing efficiency.

US Patent:

7443764, Oct 28, 2008

Filed:

Jul 5, 2006

Appl. No.:

11/481231

Inventors:

Joseph A. Clark - Arlington VA, US
Jane A. Young - Silver Spring MA, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01V 1/04
H04R 1/00

US Classification:

367142

Abstract:

Each of a pair of electrically conductive spiral coils is ensconced in a disk-shaped matrix. The two coil-ensconced matrices are joined face-to-face so as to sandwich between them a thin, non-magnetic elastic layer. An electronic device is connected so that each coil and a corresponding capacitor form an LC circuit. Electrification of the two LC circuits results in the departing and returning, in oscillatory fashion, of the two coil-ensconced matrices. This resonant behavior is both electromagnetic and mechanical in nature. The intermittent electromagnetic repelling is related to the LC circuitry and the oppositely polar electrifications of the respective coils. The springy mechanical activity is based on a spring-mass model and involves the elasticity of the intermediate material and the entrainment of ambient fluid. The dual oscillatory modes are merged at the same frequency through tuning of either/both oscillatory mode(s). In many applications, an inventive acoustic projector produces pressure waves underwater.

US Patent:

7548489, Jun 16, 2009

Filed:

Jul 5, 2006

Appl. No.:

11/482296

Inventors:

Joseph A. Clark - Arlington VA, US
Jane A. Young - Silver Spring MD, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01V 1/04
H04R 1/00

US Classification:

367142

Abstract:

Each of a pair of electrically conductive spiral coils is ensconced in a disk-shaped matrix. The two coil-ensconced matrices are joined face-to-face so as to sandwich between them a thin, non-magnetic elastic layer. An electronic device is connected so that each coil and a corresponding capacitor form an LC circuit. Electrification of the two LC circuits results in the departing and returning, in oscillatory fashion, of the two coil-ensconced matrices. This resonant behavior is both electromagnetic and mechanical in nature. The intermittent electromagnetic repelling is related to the LC circuitry and the oppositely polar electrifications of the respective coils. The springy mechanical activity is based on a spring-mass model and involves the elasticity of the intermediate material and the entrainment of ambient fluid. Underwater acoustic projection performance can be predicted by inputting design parameters in an algorithm inter-relating voltage input, electromagnetic behavior, mechanical behavior, and acoustic energy field output.

US Patent:

7839721, Nov 23, 2010

Filed:

Jul 30, 2008

Appl. No.:

12/221152

Inventors:

Joseph A. Clark - Arlington VA, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H04B 1/06

US Classification:

367135, 367119

Abstract:

The present invention, as typically embodied, represents a novel methodology for effecting linear processing of output signals that are received from one or more acoustic vector sensors. First, as pertains to each modal beam, the modal beam amplitude response b, is calculated as the matrix product of a data vector d and a modal weighting vector w, wherein the weighting vector wis uniquely defined in terms of three different linear modal weighting vector equations corresponding to w, w, and w, respectively. Second, as pertains to all of the modal beams, the directional beam amplitude response bis calculated as the sum of all of the individual modal beam amplitude responses b. Because the inventive processing methodology is linear in nature (as distinguished from non-linear, e. g. , quadratic, in nature), inventive practice is highly effective for performing quantitative acoustic measurements of sound fields.

US Patent:

53474961, Sep 13, 1994

Filed:

Aug 11, 1993

Appl. No.:

8/104707

Inventors:

Joseph A. Clark - Arlington VA
Michael A. Sartori - McLean VA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H04R 1700

US Classification:

367140

Abstract:

A method and system for mapping the acoustic near field of a stationary al symmetric structure are provided. The structure is subjected to a rotating excitation energy profile from a plurality of stationary excitation sites located radially around the structure. The acoustic near field of the structure due to the rotating excitation energy profile is measured along at least one line that conforms to a longitudinal surface of the structure. Mapping of the acoustic near field is complete when one rotation of the rotating excitation energy profile is complete.

US Patent:

57243050, Mar 3, 1998

Filed:

Jun 30, 1995

Appl. No.:

8/497591

Inventors:

Joseph A. Clark - Arlington VA
Michael A. Sartori - Arlington VA
Moon H. Cho - Fairfax VA
Daniel F. Dozier - Vienna VA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H04B 1700

US Classification:

367 13

Abstract:

Acoustic near field measurement apparatus uniquely featuring mechanical eomy, in terms of placement and motion of one or more acoustic measurement devices, which is accorded by the geometric character of a structure having indicia of symmetry. One or more devices are arranged, and/or caused to move with up to three degrees of freedom, so as to manifest conformance with respect to the surface of the structure. If desired, virtually complete acoustic near field mapping of the structure can be effectuated. Examples of the various embodiments of this invention include: circumferentially conformal arrayal of devices in combination with longitudinal movement of the arrayal; longitudinally conformal arrayal of devices in combination with circumferential movement of the arrayal; movement of one or more devices in a path or paths which are circumferentially conformal; movement of one or more devices in a path or paths which are longitudinally conformal; movement of one or more devices in a path or paths which are radial. For some embodiments a single device can be caused to move circumferentially, longitudinally and radially, and thus is provided three degrees of freedom. The apparatus according to this invention is more feasible and reliable than previous apparatus, especially for larger structures.

US Patent:

56489366, Jul 15, 1997

Filed:

Jun 30, 1995

Appl. No.:

8/497589

Inventors:

Joseph A. Clark - Arlington VA
Michael A. Sartori - Arlington VA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H04B 1700

US Classification:

367 13

Abstract:

Acoustic near field measurement method uniquely featuring mechanical econ, in terms of placement and motion of one or more acoustic measurement devices, which is accorded by the geometric character of a structure having indicia of symmetry. One or more devices are arranged, and/or caused to move with up to three degrees of freedom, so as to manifest conformance with respect to the surface of the structure. If desired, virtually complete acoustic near field mapping of the structure can be effectuated. Examples of the various embodiments of this invention include: circumferentially conformal arrayal of devices in combination with longitudinal movement of the arrayal; longitudinally conformal arrayal of devices in combination with circumferential movement of the arrayal; movement of one or more devices in a path or paths which are circumferentially conformal; movement of one or more devices in a path or paths which are longitudinally conformal; movement of one or more devices in a path or paths which are radial. For some embodiments a single device can be caused to move circumferentially, longitudinally and radially, and thus is provided three degrees of freedom. The method according to this invention is more feasible and reliable than previous methods, especially for larger structures.