Appeal No. 1997-3255
Application 08/199,455
BACKGROUND
The invention is directed to a loudspeaker having a member extending from a cone driver.
Claim 1 is reproduced below.
1. A loudspeaker comprising an enclosure, an electroacoustic transducer having a
frustoconical diaphragm which has an axis and which defines a frustoconical volume, and a
member1 extending along said axis and having a front portion with a front end and a rear portion
with a rear end, said rear portion extending into said frustoconical volume and defining with said
diaphragm a first acoustic channel having a generally annular lateral cross-section tapering
outwardly away from said rear end, said front portion having a non-circularly symmetric lateral
cross-section and being spaced apart from and co-operating with said enclosure to define a
second acoustic channel forming a continuation of said first acoustic channel and having a
generally annular lateral cross-section, said second acousic channel having a first cross-sectional
shape in a vertical plane including the axis and a second cross-sectional shape different from said
first cross-sectional shape in a horizontal plane which includes the axis.
The examiner relies on the following reference:
Isaacs Re. 32,183 Jun. 17, 1986
(Reissue of U.S. Patent 4,181,193 Jan. 1, 1980)
Claims 1-10 stand rejected under 35 U.S.C. § 102 as being anticipated by Isaacs.2
1 The appendix of claims submitted with the Brief incorrectly recites a “single” member, as the
claim was proposed to be changed by the After Final amendment filed July 24, 1995 (Paper No. 12).
Appellants were notified that the amendment had not been entered in the Advisory Action mailed August
9, 1995 (Paper No. 13).
2 A second Section 102 rejection over a different reference was not repeated in the Examiner’s
Answer and is deemed withdrawn.
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