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. 19, 1977
Filed:
Nov. 13, 1975
Applicant:
Inventor:
Daniel R von Recklinghausen, Arlington, MA (US);
Assignee:
Electro Audio Dynamics, Inc., Great Neck, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
1791 / ;
Abstract
An improved planar audio transducer or loudspeaker is described. It has a plastic diaphragm with a current carrying coil on one surface formed of aluminum conductors. A magnetic field is provided at the conductors from rows of magnets spaced from each other and mounted on opposite sides of the membrane on a pair of outer iron support members. A predetermined positioning of the magnets and a predetermined magnet and diaphragm spacing is provided by magnet mounting grooves in the iron support members and by surrounding the magnets with non-metallic frame members sandwiched between the iron magnet support members and the membrane.