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. 08, 2003
Filed:
Feb. 02, 2000
Burkhard Tigges, Balve, DE;
Michael Faber, Lüdenscheid, DE;
Werner Turck GmbH & Co. KG, Halver, DE;
Abstract
An inductive proximity switch having a coil situated to the rear of an “active” housing wall and belonging to a receiver circuit, whose signal changes as a metallic object approaches, the coil being operatively connected to a switching amplifier which changes its switching state when the object reaches a predetermined distance. In order to reduce the influence on the switching distance of any covering of the active surface with welding dust, there is a supplementary sensor, associated with the “active” housing wall ( ), to provide electronic compensation for changes in the receiver signals produced by metallic deposits, especially ferritic deposits, on the “active” housing wall ( ).