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:
Jun. 12, 1990
Filed:
May. 19, 1988
Applicant:
Inventor:
Douglas J Button, Los Angeles, CA (US);
Assignee:
Electro-Voice, Inc., Buchanan, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ; H04R / ; H04R / ; H04R / ;
U.S. Cl.
CPC ...
381192 ; 381193 ; 381194 ; 381197 ; 381199 ;
Abstract
A loudspeaker with a voice coil reciprocally disposed in a magnetic gap provided with means for conducting heat outwardly from the gap comprising a flat circular web disposal in abuttment with the magnetic structure and extending between a cylindrical collar which confronts the voice coil former to a circular ring integral with the frame of the loudspeaker and including vanes extending from the web between the collar and ring. The voice coil former is limited to axial motion by a pair of spaced flat disks mounted at their centers on the central pole piece normal to the axis of motion and on the coil former at their perimeters.