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:
Aug. 01, 1978
Filed:
Oct. 15, 1976
Applicant:
Inventors:
Louis P Sweany, Carmel, IN (US);
Michael T Burk, Indianapolis, IN (US);
Assignee:
P.R. Mallory & Co. Inc., Indianapolis, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
3403 / ; 3403 / ;
Abstract
A piezoelectric transducer and a voltage doubling means are utilized in conjunction with a power supply means, a pulsator means, an amplifier means, and an acoustical loading means to produce an efficient high output audible alarm device. The voltage doubling means and the acoustical loading means enhance the audible output of the alarm device while increasing the overall electroacoustical efficiency of the alarm.