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:
Nov. 20, 1979
Filed:
May. 17, 1978
Applicant:
Inventors:
Mototaka Harakawa, Shizuoka, JP;
Yoshio Mitumori, Shizuoka, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10K / ; G10K / ;
U.S. Cl.
CPC ...
340388 ; 3403 / ; 340392 ; 340396 ;
Abstract
A buzzer comprises a vibrator unit including a diaphragm which is supported within a housing, and a drive unit including a coil assembly which electromagnetically excites the vibrator unit. The coil assembly includes a bobbin of a non-magnetic and non-conductive material and having flanges at its both axial ends, and a winding disposed on the bobbin. The drive unit is supported by at least one of the flanges and is provided with a plurality of rigid electrical leads which project to the exterior of the housing.