Patent
1983-06-06
1985-10-15
Rubinson, Gene Z.
1791155PC, 1791155VC, H04R 904
Patent
active
045476314
ABSTRACT:
An electroacoustic transducer comprises a diaphragm (1), a magnet system (4) and a voice coil (3) arranged on a voice-coil former (2) in an air gap (5) of the magnet system. The movement is transmitted between the voice-coil former and the diaphragm via a lever mechanism comprising n lever devices (6) arranged at an angle relative to each other (n.gtoreq.2). A lever device (6) comprises a lever arm (9) coupled to a fulcrum (11) at the location of a first position (10) on the lever arm, to the voice-coil former (2) at the location of a second position (13), and to the diaphragm (1) at the location of a third position (14). The lever mechanism multiplies the excursion of the voice-coil former by a factor greater than unity. This results in an electroacoustic transducer with a long stroke which provides large excursions of the diaphragm. The lever mechanism may also be employed in other types of transducer, such as piezo-ceramic transducers. A compliant element (25) formed as a zigzag bellows secured both to the outer circumference of the diaphragm and to the chassis (26) to permit the large excursion of the diaphragm, is constructed so as to reduce the acoustic contribution of the compliant element to the transducer output signal, which contribution forms a distortion component in the output signal.
REFERENCES:
patent: 1551105 (1925-08-01), Haues
patent: 1679194 (1928-07-01), Widmann
patent: 1823512 (1931-09-01), Ringel
patent: 1844605 (1932-02-01), Seabert
patent: 3185767 (1965-05-01), Olson
patent: 3578921 (1971-05-01), Knauert
patent: 3947647 (1976-03-01), Swinehart
patent: 4246447 (1981-01-01), Vorie
patent: 4345118 (1982-08-01), Takemura
patent: 4379952 (1983-04-01), Kaizer
patent: 4387275 (1983-06-01), Shimada
Kaizer Adrianus J. M.
Nieuwendijk Joris A. M.
Sanders Georgius B. J.
Van Dijk Cornelis D.
Franzblau Bernard
Mayer Robert T.
Rubinson Gene Z.
Schroeder L. C.
U.S. Philips Corporation
LandOfFree
Large-excursion electroacoustic transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Large-excursion electroacoustic transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large-excursion electroacoustic transducer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2431857