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:
Nov. 01, 1983
Filed:
May. 28, 1982
Applicant:
Inventors:
Stuart W Lumsden, Baltimore, MD (US);
Matthew S Polk, Baltimore, MD (US);
Assignee:
Polk Audio, Inc., Baltimore, MD (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ; H04R / ;
U.S. Cl.
CPC ...
1791 / ; 1791 / ; 1791 / ;
Abstract
A moving coil transducer such as a loudspeaker has its coil formed of multiple strand or litz wire. The structure includes a form having multiple turns of the stranded wire thereon, and the leads or ends of the stranded wire forming the coil extend continuously from the moving coil structure to attachment or terminal means carried on some portion of a fixed structure associated with the moving coil. The multiple strand wire is twisted to a predetermined lay throughout its length.
Lumsden, Stuart. (1983). Moving coil transducers using multiple-stranded coils (U.S. Patent No. 4413162). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4413162
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile