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:
Jul. 20, 1993
Filed:
Jul. 24, 1991
Applicant:
Inventor:
Jean-Luc Lamarche, Langenargen, DE;
Assignee:
ifm electronic gmbh, Essen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
307116 ; 307126 ; 307127 ;
Abstract
An electronic detection circuit such as a proximity switch or flow detector uses a presence detector with complementary outputs and one or more electronic switches to provide either normally-open or normally-closed operation based on the polarity of the supply connections to the device. In one embodiment, two electronic switches are provided, each operating in response to one of the complementary outputs, with each switch connected to provide current flow in a mutually opposite direction between the supply connections upon activation. In another embodiment, a single electronic switch is provided, and is connected through a diode matrix to the complementary outputs.