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:
Apr. 08, 1980
Filed:
Mar. 27, 1978
Applicant:
Inventor:
Robert W Reams, Tulsa, OK (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10K / ; H04R / ; H05K / ;
U.S. Cl.
CPC ...
181145 ; 181152 ; 181155 ; 181159 ; 181199 ;
Abstract
An acoustic transducer for reproduction of sound over a wide frequency band. The transducer consists of an elongated partially enclosed chamber having a sound source at one end and wherein the cross-sectional area of the chamber is decreased with distance along the length of the chamber away from the sound source. A curved wall is included in the chamber to serve as an expanding horn, the lower end of which is provided with an elongated slot aperture which widens exponentially as a function of the length of the chamber through which sound energy is delivered to the aperture of the horn.