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. 10, 2004
Filed:
Sep. 30, 2002
Jens Titschert, Lunen, DE;
Jorg Wagner, Lunen, DE;
Emmanuel Charruau, Lunen, DE;
Helmut Hermann, Bochum, DE;
DBT Automation GmbH, Lunen, DE;
Abstract
The warning tone transmitter ( ) according to the invention has a piezoelectric horn element ( ) with two input connectors ( ) for the application of the supply voltage at a determined frequency and has a circuit arrangement ( ) fed from the current supply, which generates the supply voltage. In order to be able to receive confirmation that the horn signal is actually generated by the warning tone transmitter ( ) and in order to be able more easily to calibrate the warning tone transmitter ( ) such that it is driven at its resonant frequency the piezoelectric horn element ( ) has an additional output connector ( ), which, when the horn element ( ) is fed with the supply voltage, generates an answering signal taken to the circuit arrangement ( ) if the piezoelement is actually oscillating. The magnitude of the answering signal is a value for the sound volume of the warning tone transmitter ( ).