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:
Jan. 06, 1978
Ellis J Gottlieb, Ft. Lauderdale, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
The speaker grill is a part of a molded plastic member which may form a wall of housing for a device which includes an audio transducer. The plastic member includes provisions for supporting the audio transducer adjacent the grill, which has openings for the transmission of sound. The grill has stress regions in which there are no openings, which are in tension when the grill is flexed to thereby increase the strength of the grill. The stress regions may extend across the grill in an 'X' pattern, or in any other pattern wherein one of a plurality of such regions extends transversely with respect to another region. The openings for sound transmission may be slots extending from the sides of grooves, which form labyrinth openings so that there is no direct passage through the grill, thereby tending to prevent entry of undesired objects.