Loudspeakers

Details Loudspeakers Loudspeakers

1995-05-23

1997-12-16

Kuntz, Curtis

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having electrostatic element

381199, 381202, H04R 2500

Patent

active

056994397

ABSTRACT:
According to the state of the art, insofar as the respective components of the loudspeaker cannot be built in one piece, the respective components of the loudspeaker are joined to each other by adhesives. For example, it is known to bond the aluminum voice coil support (10) to the paper loudspeaker diaphragm (11). However, if loudspeakers with such bonded joints must operate above 120 degrees Celsius, no long-term continuous operation of the mechanically highly stressed adhesion can be expected. The invention therefore has the task of presenting a very strong mechanical joint of the loudspeaker components. The task is fulfilled according to the invention, in that at least the surface areas (13.1, the voice coil support (10) and the loudspeaker diaphragm (11)! are made of metals that can be ultrasonically welded to each other, and that the joint between the two components of the loudspeaker is ultrasonically weldable. Insofar as required, an insulation arrangement (16) can be placed between the two just mentioned loudspeaker components, which can be this instance loudspeaker diaphragm (11) and voice coil support (10)!, through their metal coatings (19.1, 19.2), which are also made of ultrasonically weldable metal.

REFERENCES:
patent: 3925626 (1975-12-01), Stallings, Jr.
patent: 4029911 (1977-06-01), Albinger
patent: 4567327 (1986-01-01), Goossens et al.
patent: 4590333 (1986-05-01), Strohbeen
patent: 5062140 (1991-10-01), Inanaga et al.
patent: 5283397 (1994-02-01), Pavlovic
Patent Abstracts of Japan, vol. 11, No. 61 (E-483), Feb. 25, 1987 & JP-A-61 220592, Kozo Sakane, Sep. 30, 1986, one page.
"High Performance Loudspeakers", M. Colloms, 3rd Ed., Pentech Press, London, Plymouth, 1985, pp. 118-119 and 128-129.
"Die Verfahren der Schweisstechnik", Deutscher Verband fur Schweisstechnik e.V., Dusseldort, 1974.

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