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:
Oct. 06, 1998
Filed:
Jul. 31, 1996
Charles G Shepherd, Oakville, CA;
Fox 40 International Inc., Hamilton, CA;
Abstract
A whistle is provided which will create two frequencies when blown to produce a beat. The whistle has a mouthpiece defining an inlet opening and an inlet passageway extending axially from the inlet opening to a main body which has two similar chambers extending generally axially. Air from the passageway engages two splitter edges associated one with each of the chambers. A lanyard receiver extends axially from the main body remote from the mouthpiece and defines a transverse cavity connected to one of the axial chambers. The whistle is made from first and second parts having mating peripheral surfaces where a joint is made. The arrangement of the whistle is such that two resonant frequencies are created each having a different audible frequency to create a beat. This is achieved in a simple, light and compact structure which is simple to assemble resulting in a relatively inexpensive whistle having good sound characteristics.