Acoustics – Diaphragm – Particular shape
Reexamination Certificate
2006-01-17
2008-10-21
Donovan, Lincoln (Department: 2837)
Acoustics
Diaphragm
Particular shape
C181S164000, C181S165000, C381S423000
Reexamination Certificate
active
07438156
ABSTRACT:
A diaphragm in one mode of the present invention comprises an outer shape section having a circle with one diameter, or a shape of a polygon to be inscribed in a circle with the one diameter; an inner shape section protruding in one direction with regard to a plane including the outer shape section, wherein a shape formed by projecting the inner shape section on the plane is rotationally symmetric about the central axis of the circle; and a vibrating face section linking the outer shape section and the inner shape section and having an inclined face inclined to the central axis, wherein any one of cross-sectional shapes of the vibrating face section is rotationally symmetric about an eccentric axis which is eccentric with regard to the central axis, the cross-sectional shapes being defined by a plane intersecting perpendicularly to the central axis. An electroacoustic transducer uses the above diaphragm.
REFERENCES:
patent: 1748990 (1930-03-01), Nilson
patent: 1859629 (1932-05-01), Nilson
patent: 3940576 (1976-02-01), Schultz
patent: 09-284886 (1997-10-01), None
patent: 2000-078686 (2000-03-01), None
patent: 2001-095088 (2001-04-01), None
Inagaki Kazuyuki
Nakaso Jiro
Omoda Manabu
Donovan Lincoln
Luks Jeremy
Meyer Jerald L.
Nath Gary M.
The Nath Law Group
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