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. 23, 2004
Filed:
Sep. 06, 2002
Applicant:
Inventor:
Olaf Machul, Freiburg, DE;
Assignee:
Sick AG, Waldkirch, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 3/3025 ;
U.S. Cl.
CPC ...
G01R 3/3025 ;
Abstract
An inductive proximity sensor has an oscillatory circuit (L, C, R ), an electric energy source ( ) coupled to the oscillatory circuit for compensating losses in the circuit, and a filter ( ) for compensating signal changes encountered in the oscillatory circuit. The input of the filter is coupled to the oscillatory circuit and its output is coupled and sending output signals to the energy source. The energy source changes the energy or current supplied to the oscillatory circuit as a function of the output signals from the filter to thereby actively compensate for signal changes encountered in the oscillatory circuit.