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:
Apr. 13, 1999
Filed:
Jul. 18, 1997
Daniel E Zimmermann, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
An apparatus for generating a audible tone is disclosed. The apparatus includes a non-ferromagnetic container 105, a ferromagnetic member 110, a coil 115, a first stationary lead wire 175, a second stationary lead wire 180, and a flexible ferromagnetic diaphragm 120. The ferromagnetic member 110 is essentially disposed within the nonferromagnetic container 105. The coil 115 is encircling a portion of the ferromagnetic member 110. The coil 115 has an input end 165 connected to a first stationary lead wire 175, configured to receive an electrical signal, and an output end 170 connected to a second stationary lead wire 180. The flexible ferromagnetic diaphragm 120 is disposed along the top edge 135 of the non-ferromagnetic container 105. The flexible ferromagnetic diaphragm 120 is configured to flex when magnetically attracted toward the ferromagnetic member 110. As the flexible ferromagnetic diaphragm 120 flexes the first stationary lead wire 175 and the second stationary lead wire 180 will remain stationary.