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:
Feb. 20, 2018
Filed:
Jan. 23, 2014
Applicant:
Federal Signal Corporation, Oak Brook, IL (US);
Inventors:
Scott Cassidy, Crown Point, IN (US);
Lonnie Moravetz, Lincoln, NE (US);
David L. Corey, Crown Point, IN (US);
Robert Steiert, Crete, IL (US);
Assignee:
Federal Signal Corporation, Oak Brook, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R 17/00 (2006.01); G08B 3/10 (2006.01); G10K 9/12 (2006.01); G10K 15/02 (2006.01);
U.S. Cl.
CPC ...
H04R 17/00 (2013.01); G08B 3/10 (2013.01); G10K 9/12 (2013.01); G10K 15/02 (2013.01); H04R 2430/00 (2013.01);
Abstract
A tone generation system includes a square wave signal generator configured to generate a first series of square wave signals to replicate a fundamental frequency of a desired mechanical tone, and a second series of square waves signals to replicate a second harmonic of the desired mechanical tone. An amplifier is configured to receive the first and second series of square waves, and a speaker is connected to receive an output signal from the amplifier.