Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2007-10-09
2007-10-09
Kim, Paul D. (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S592100, C029S609100, C156S250000, C156S267000, C156S292000, C156S293000, C156S297000, C264S212000, C264S216000, C264S320000, C264S323000, C264S331120, C381S113000, C381S116000, C381S119000, C381S174000, C381S398000, C381S408000, C381S431000
Reexamination Certificate
active
10429165
ABSTRACT:
Electro-dynamic loudspeakers typically include a diaphragm having a conductor applied to one of its surfaces. The diaphragm is secured to a frame. The conductor is connected to a power supply for providing electrical current through linear traces of the conductor that interact with magnetic fields generated by magnets that are mounted to the frame. The diaphragm is driven by a motive force created when current passes through the conductor within the magnetic field. The electrical current is varied to create an acoustical output from the electro-dynamic loudspeaker. Different methods of tensioning the diaphragm are provided for simplifying the manufacturing process and for assuring proper diaphragm tension.
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Garner David B.
Steere John F.
Harman International Industries Incorporated
Kim Paul D.
Pauley Petersen & Erickson
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