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. 06, 1999
Filed:
Feb. 26, 1998
Applicant:
Inventors:
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05K / ;
U.S. Cl.
CPC ...
181156 ;
Abstract
A loudspeaker system includes an enclosure (1) which accommodates a loudspeaker device (3) and a bass-reflex port (5) having two open ends (5b, 5c). The port has a longitudinal axis (5a) and a length (L) defined by the two open ends, and has a passage which flares towards the two open ends. This provides flared portions (5d, 5e) which extend over a substantial part of the length of the port. In order to minimize undesirable noises and distortions, the flared portions, in a longitudinal section of the port, have bounding lines (7) which extend at an angle .alpha. having a value of between 3.degree. and 12.degree. with respect to the longitudinal axis of the port.