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:
Nov. 04, 2003
Filed:
Feb. 27, 2001
Felix Raffalt, Hausach, DE;
Adrian Frick, Wolfach, DE;
VEGA Grieshaber KG, Schiltach, DE;
Abstract
The invention pertains to a level measuring by an apparatus has oscillating fork ( ) that is excited to oscillate by an oscillator circuit that, for example, is realized in the form of a series circuit consisting of an input amplifier ( ), a band filter ( ) and an output amplifier ( ). An identifying element ( ) is assigned to the oscillating fork ( ), with the identifying element transmitting the fundamental frequency of the oscillating fork ( ) to the oscillator circuit ( ) in coded form. In addition, the identifying element ( ) transmits the fundamental frequency of the oscillating fork ( ) to the control input of a frequency evaluation circuit ( ), the input of which is connected to the output of the oscillator circuit ( ). Consequently, the parameters of the band filter ( ), as well as of the frequency evaluation circuit ( ), are optimally adjusted to the fundamental frequency of the oscillating fork ( ).