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:
Feb. 13, 2001
Filed:
Feb. 15, 2000
Robert Buck, Wasserburg, DE;
Reinhard Teichmann, Amtzell, DE;
i f m electronic GmbH, Essen, DE;
Abstract
An electronic, proximity-type switching device with a first switching device terminal (,), a second switching device terminal (,), a sensor and evaluation circuit (,) which contains an externally influenceable proximity indicator and an operating voltage supply circuit for making available the internally required operating voltage (= internal operating voltage) and with an electronic switch (,) which is controllable by the sensor and evaluation circuit (,), for example, a switching transistor, the sensor and evaluation circuit (,), on the one hand, and the electronic switch (,), on the other, being connected essentially in parallel and to the first switching device terminal (,) and the second switching device terminal (,). To enable the switching device to be used as a normal 2-wire switching device and also as a 3-wire switching device, there is a third switching device terminal (,) and there are a current rise (,) which is active in the conductive state of the switching device and/or a voltage drop or limitation (,) which is active in the blocked state of the switching device between the second switching device terminal (,) and the third switching device terminal (,).