David A Garner

US Patent:

7035425, Apr 25, 2006

Filed:

May 2, 2003

Appl. No.:

10/429243

Inventors:

Steven W. Hutt - Bloomington IN, US
David B. Garner - Indianapolis IN, US
John F. Steere - Martinsville IN, US

Assignee:

Harman International Industries, Incorporated - Northridge CA

International Classification:

H04R 25/00

US Classification:

381431, 381421

Abstract:

In an electro-dynamic loudspeaker, vent holes are optimized to provide improved the magnetic flux characteristics while maintaining sufficient ventilation. In addition, ported and unported enclosures may be utilized with the electro-dynamic loudspeakers to enhance low frequency performance.

US Patent:

7136501, Nov 14, 2006

Filed:

Jan 19, 2005

Appl. No.:

11/039494

Inventors:

John F Steere - Martinsville IN, US
David B. Garner - Indianapolis IN, US
Steven W Hutt - Bloomington IN, US

Assignee:

Harman International Industries, Incorporated - Northridge CA

International Classification:

H04R 7/06
H04R 1/02
H04R 7/16

US Classification:

381399, 381190, 381408, 381423

Abstract:

An electro-dynamic loudspeaker is provided with dampening arrangements that contribute to improved acoustical properties for the electro-dynamic planar loudspeaker. The dampening arrangements include providing a frame having a curved sidewall surface for reducing standing waves. Another design provides for a ferrofluid being disposed between the diaphragm and magnets of the electro-dynamic loudspeaker in order to dampen the resonance frequency of the device. In addition, a diaphragm of an electro-dynamic loudspeaker is provided with a short turn of conductor disposed along a fringe zone at an edge of the diaphragm in order to electro-dynamically dampen the edge resonance of the film.

US Patent:

7146017, Dec 5, 2006

Filed:

May 2, 2003

Appl. No.:

10/429228

Inventors:

John F. Steere - Martinsville IN, US
Ronald E. Fenwick - Bloomington IN, US
David B. Garner - Indianapolis IN, US

Assignee:

Harman International Industries, Incorporated - Northridge CA

International Classification:

H04R 25/00

US Classification:

381176, 381399

Abstract:

An electro-dynamic loudspeaker is typically provided with a diaphragm mounted to a frame in tension. The diaphragm is provided with a plurality of electrical traces that are disposed within a magnetic field of a plurality of magnets that are mounted to the frame. Electric current applied to the circuit causes electric current to pass through the wiring that interacts with the magnetic field of the magnets to thereby cause vibration of the diaphragm that causes the sound generated by the electro-dynamic loudspeaker. Electrical connector arrangements and methods are provided for connecting the electric circuit of the diaphragm to a power amplifier.

US Patent:

7152299, Dec 26, 2006

Filed:

May 2, 2003

Appl. No.:

10/429164

Inventors:

Louis A. Mango - Trafalgar IN, US
John F. Steere - Martinsville IN, US
David B. Garner - Indianapolis IN, US
Steven W. Hutt - Bloomington IN, US
Ronald E. Fenwick - Bloomington IN, US

Assignee:

Harman International Industries, Incorporated - Northridge CA

International Classification:

H04R 31/00

US Classification:

29594, 295921, 296091, 264212, 264216, 264320, 264323, 26427212, 156 731, 156250, 156267, 156292, 381116, 381191, 381174, 381398

Abstract:

Electro-dynamic loudspeakers typically include a diaphragm having a conductor applied to one of its surfaces. The diaphragm is secured to a frame. The conductor is connected to a power supply for providing electrical current through linear traces of the conductor that interact with magnetic fields generated by magnets that are mounted to the frame. The diaphragm is driven by a motive force created when current passes through the conductor within the magnetic field. The electrical current is varied to create an acoustical output from the electro-dynamic loudspeaker. Different frame structures are provided for simplifying the manufacturing process and defining a reduced cost electro-dynamic loudspeaker.

US Patent:

7203332, Apr 10, 2007

Filed:

May 2, 2003

Appl. No.:

10/429163

Inventors:

Steven W. Hutt - Bloomington IN, US
John F. Steere - Martinsville IN, US
David B. Garner - Indianapolis IN, US
Louis A. Mango - Trafalgar IN, US

Assignee:

Harman International Industries, Incorporated - Northridge CA

International Classification:

H04R 1/02

US Classification:

381399, 381408, 381421

Abstract:

An electro-dynamic loudspeaker includes a frame, a plurality of magnets and a diaphragm. The frame includes a molded plastic body. The magnets may be molded into the frame in a determined configuration. The frame is mechanically coupled to the diaphragm such that the magnets are a determined distance from the diaphragm. The diaphragm may include a conductor applied to a surface of the diaphragm. The diaphragm may be driven by a motive force created when current passes through the conductor within a magnetic field formed by the magnets. The electrical current may be varied to create an acoustical output from the electro-dynamic loudspeaker.

US Patent:

7278200, Oct 9, 2007

Filed:

May 2, 2003

Appl. No.:

10/429165

Inventors:

John F. Steere - Martinsville IN, US
David B. Garner - Indianapolis IN, US

Assignee:

Harman International Industries, Incorporated - Northridge CA

International Classification:

H04R 31/00

US Classification:

29594, 295921, 296091, 156250, 156267, 156292, 156293, 156297, 264212, 264216, 264320, 264323, 26433112, 381113, 381116, 381119, 381174, 381398, 381408, 381431

Abstract:

Electro-dynamic loudspeakers typically include a diaphragm having a conductor applied to one of its surfaces. The diaphragm is secured to a frame. The conductor is connected to a power supply for providing electrical current through linear traces of the conductor that interact with magnetic fields generated by magnets that are mounted to the frame. The diaphragm is driven by a motive force created when current passes through the conductor within the magnetic field. The electrical current is varied to create an acoustical output from the electro-dynamic loudspeaker. Different methods of tensioning the diaphragm are provided for simplifying the manufacturing process and for assuring proper diaphragm tension.

US Patent:

7716808, May 18, 2010

Filed:

Dec 28, 2007

Appl. No.:

12/005697

Inventors:

Steven W. Hutt - Bloomington IN, US
John F. Steere - Martinsville IN, US
David B. Garner - Indianapolis IN, US
Louis A. Mango - Trafalgar IN, US

Assignee:

Harman International Industries, Incorporated - Northridge CA

International Classification:

H04R 31/00

US Classification:

29594, 295921, 296091, 156 731, 156250, 156267, 156292, 156293, 264212, 264216, 264320, 264323, 381113, 381116, 381174, 381191, 381398

Abstract:

Electro-dynamic loudspeakers typically include a diaphragm having a conductor applied to one of its surfaces where the diaphragm is secured to a frame. The conductor is connected to a power supply for providing electrical current through linear traces of the conductor that interact with magnetic fields generated by magnets that are mounted to the frame. The diaphragm is driven by a motive force created when current passes through the conductor within the magnetic field. The electrical current is varied to create an acoustical output from the electro-dynamic loudspeaker. Different methods of attaching the diaphragm are provided for simplifying the manufacturing process and for obtaining a robust electro-dynamic loudspeaker.

US Patent:

20040008858, Jan 15, 2004

Filed:

May 2, 2003

Appl. No.:

10/429289

Inventors:

John Steere - Martinsville IN, US
David Garner - Indianapolis IN, US
Steven Hutt - Bloomington IN, US

International Classification:

H04R001/00
H04R009/06
H04R011/02

US Classification:

381/398000, 381/396000

Abstract:

An electro-dynamic loudspeaker is provided with dampening arrangements that contribute to improved acoustical properties for the electro-dynamic planar loudspeaker. The dampening arrangements include providing a frame having a curved sidewall surface for reducing standing waves. Another design provides for a ferrofluid being disposed between the diaphragm and magnets of the electro-dynamic loudspeaker in order to dampen the resonance frequency of the device. In addition, a diaphragm of an electro-dynamic loudspeaker is provided with a short turn of conductor disposed along a fringe zone at an edge of the diaphragm in order to electro-dynamically dampen the edge resonance of the film.