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. 15, 1980
Filed:
Jun. 08, 1978
Applicant:
Inventors:
Richard L Learn, Indianapolis, IN (US);
Louis P Sweany, Carmel, IN (US);
Assignee:
Emhart Industries, Inc., Indianapolis, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
3403 / ; 3403 / ;
Abstract
An audible signalling system utilizes a piezoelectric transducer to produce a chime tone audible signal. The system includes audible signalling circuitry, circuitry for driving the audible signalling circuitry to provide a pulsed audible signal, and circuitry for exponentially decaying the pulsed audible signal to produce a chime tone audible signal.