Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having electrostatic element
Patent
1991-05-29
1994-03-15
Kuntz, Curtis
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having electrostatic element
381194, 381195, 381196, 381197, H04R 2500
Patent
active
052951944
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.
REFERENCES:
patent: 2426948 (1947-09-01), Preston
patent: 2539672 (1951-01-01), Olson
patent: 4386241 (1983-05-01), Maeda
patent: 4401857 (1983-08-01), Morikawa
patent: 4475014 (1984-10-01), King
patent: 4497981 (1985-02-01), House
patent: 4554414 (1985-11-01), House
patent: 4845776 (1989-07-01), Bittencourt
Chan Jason
Kuntz Curtis
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