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:
Jan. 31, 1978
Filed:
Sep. 30, 1975
Applicant:
Inventor:
D Broadus Keele, Jr, Galien, MI (US);
Assignee:
Electro-Voice, Incorporated, Buchanan, MI (US);
Primary Examiner:
Int. Cl.
CPC ...
G10K / ;
U.S. Cl.
CPC ...
181187 ; 181159 ;
Abstract
A loudspeaker with a driver and horn in which the horn has a channel expanding in cross section exponentially from the throat of the horn to a second portion, the second portion expanding conically to a rapidly flaring bell portion which terminates in the mouth of the horn. In one embodiment, the channel has a rectangular cross section to provide a wider horizontal beam width than vertical beam width.