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:
Jul. 31, 1979
Filed:
Jan. 23, 1978
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
3403 / ; 340388 ; 3403 / ;
Abstract
A buzzer comprises a vibration unit, an electromagnet transducer for applying an electromagnetic excitation to the unit, and an electronic oscillation circuit for driving the transducer. The oscillation circuit includes a group of electrical components which constitute a blocking oscillator together with the coil assembly of the transducer and which are contained on a bipolar integrated circuit module. The module is mounted on the coil bobbin of the transducer.