Eugene J Christensen

US Patent:

20130301865, Nov 14, 2013

Filed:

May 7, 2013

Appl. No.:

13/888836

Inventors:

Eugene J. Christensen - Aspen CO, US

International Classification:

H04R 3/00

US Classification:

381395, 381150

Abstract:

An air motion transformer loudspeaker driver including a plurality of diaphragm layers having electric conductors. Each of the diaphragm layers defines a surface having at least one curved portion. The curved portions have an axis of curvature being perpendicular to the surface of the diaphragm layer at the location of the curved diaphragm portions.

US Patent:

50621394, Oct 29, 1991

Filed:

Jun 5, 1989

Appl. No.:

7/361351

Inventors:

Eugene J. Christensen - Lake George NY

International Classification:

H04R 2500

US Classification:

381192

Abstract:

A multi-driver, coaxially mounted loud speaker array utilizing a high frequency bi-morph driving element that is totally contained within the hollow core of the voice coil former of a lower frequency loud speaker. The outwardly radiating conical edge of the high frequency device's diaphragm is annularly fixed by a compliance to the inner surface of the referenced voice coil former or to the diaphragm which radiates outwardly therefrom and is excited by the former. A significant advancement in the art is acquired by the realization of a cavity between the situs of the bi-morph driving element and the back of the former--excited diaphragm, behind the annular compliance. This feature allows a design engineer to literally tune the response of the higher frequency loud speaker by deliberately varying the volume of the cavity.

US Patent:

52951944, Mar 15, 1994

Filed:

May 29, 1991

Appl. No.:

7/706965

Inventors:

Eugene J. Christensen - Queensbury NY

International Classification:

H04R 2500

US Classification:

381192

Abstract:

A multi-driver, coaxially mounted loudspeaker array utilizing a high frequency bi-morph driving element (tweeter) that is preferably contained within the air-core of the voice coil former of a lower frequency loudspeaker (woofer). The outwardly extending conical edge of the high frequency device's diaphragm is annularly fixed by a compliance to the inner surface of the referenced voice coil former or to the woofer diaphragm which extends outwardly therefrom. Alternately, the bi-morph element is attached to other dynamic parts of the woofer such as the dust cap or at the rim of, or otherwise on, an extension of the former. In this mode, the bi-morph element may first be mounted to a section of a cylinder or cone which acts as a frame of the same circumference or more/less than that of the coil former. Thereafter, the frame is mounted to the end of, over or inside the coil former, or any moving part of the woofer.

US Patent:

20180152782, May 31, 2018

Filed:

Nov 30, 2016

Appl. No.:

15/530087

Inventors:

Eugene Julius Christensen - Aspen CO, US

International Classification:

H04R 1/28
H04R 7/26

Abstract:

The present invention provides an improved passive radiator device by utilizing a stacked construction in which there exist two or more generally parallel and separate movable diaphragm sections, in which the relative motion of adjacent diaphragm sections will either move toward each other, or away from each other, as air pressure or sound waves emanating from the interior of a loudspeaker cabinet impinges upon the interior air openings of the present invention.

US Patent:

20150296301, Oct 15, 2015

Filed:

Jun 24, 2015

Appl. No.:

14/748824

Inventors:

Eugene J. Christensen - Aspen CO, US

International Classification:

H04R 7/12

Abstract:

An air motion transformer loudspeaker driver including a plurality of diaphragm layers having electric conductors. Each of the diaphragm layers defines a surface having at least one curved portion. The curved portions have an axis of curvature being perpendicular to the surface of the diaphragm layer at the location of the curved diaphragm portions.