The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 1997
Filed:
May. 23, 1995
Stefan Geisenberger, Straubing, DE;
Nokia Technology GmbH, Pforzheim, DE;
Abstract
According to the state of the art, the voice coil (12) of a loudspeaker is connected to the voice coil support (10) in such a way, that first the coil wire, which is surrounded by a self-bonding material, is wound around the outside jacket (14) of the voice coil support (10), and then is baked. However, under mechanical load, such a connection is only temperature-stable to about 200 degrees Celsius. It is therefore the task of the invention to present a connection between voice coil (12) and voice coil support (10), which is also temperature-stable above 200 degrees Celsius. This task is fulfilled by the invention, in that holding elements (13) are placed around the outside jacket of the voice coil (12), which act against any radial and/or axial change in position of the individual winding wires of voice coil (12). These holding elements (13) can be (ultrasonically) welded to the voice coil support (10), or be attached to the inside sleeve (18) of the voice coil support (10) by simple bending.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile