Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Reexamination Certificate
2007-11-06
2007-11-06
Le, Huyen (Department: 2615)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Plural or compound reproducers
C381S374000, C381S383000
Reexamination Certificate
active
10505255
ABSTRACT:
According to the invention a headphone set comprises a hoop band, to each of the two ends of which is fixed a respective acoustic transducer and which extends accurately in a plane, with at least one joint for folding the ends of the hoop band inwardly in the plane and an elastic region for resiliently expanding and narrowing the hoop band is either characterized in that the fixing of each of the transducers to the ends of the hoop band has a joint for pivoting the transducers into the plane and that arranged in the region of the two ends of the hoop band is a respective connecting structure which can be connected to each other and which then in co-operating relationship hold the folded-in ends of the hoop band in a crossed position or that the one joint for folding the ends of the hoop band inwardly is arranged at the apex of the hoop band, that the headphone set is of mirror image symmetry about a plane and that the fixing of each of the transducers to the ends of the hoop band has a joint for pivoting the transducers into the plane of symmetry which is at a right angle to the plane of the hoop band.
REFERENCES:
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patent: 4463223 (1984-07-01), Yamanoi et al.
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patent: 4597469 (1986-07-01), Nagashima
patent: 31 18 294 (1985-12-01), None
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patent: 0 994 636 (2000-04-01), None
Grell Axel
Kaulfuss Johannes
Le Huyen
Reed Smith LLP
Sennheiser Electronic GmbH & Co. KG
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