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:
May. 19, 1987
Filed:
Apr. 01, 1986
Applicant:
Inventor:
Bernhard Wiesgickl, Vilseck, DE;
Assignee:
Siemens Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ; G08B / ;
U.S. Cl.
CPC ...
323323 ; 340562 ; 361181 ;
Abstract
This invention concerns an inductive proximity switch having an oscillator and a resonant circuit which is dampable by outside objects, as well as an electronic switch controllable by the voltage across the resonant circuit. From the signal of the electronic switch a switching hysteresis is derived. A device for changing the frequency, when the resonant circuit is damped, as a function of the signal of the electronic switch allows the adjustment of the hysteresis in such a way that there is essentially no effect on the sensitivity of the oscillator.