United States Patent   Patent Number: 4,864,156
Tigges et al.  Date of Patent: Sep. 5, 1989
US. Patent Sep. 5,1989 Sheet 1 of 4 4,864,156
 PROXIMITY SWITCH WITH NONCONTACT EFFECT
 Inventors: Burkhard Tigges, Sundern; Dierk
Brasse, Schalksmuehle, both of Fed.
Rep. of Germany
 Assignee: Werner Turck GmbH & Co. KG.,
Halver, Fed. Rep. of Germany
 Appl. No.: 232,468
 Filed: Aug. 15, 1988
 Foreign Application Priority Data Aug. 13, 1987 [DE] Fed. Rep. of Germany 8711035
 Int. CI.4 H01H 35/00
 U.S. CI 307/117; 340/565;
 Field of Search 307/117, 116; 340/565;
 References Cited
FOREIGN PATENT DOCUMENTS
2817020 3/1986 Fed. Rep. of Germany .
Primary Examiner—William M. Shoop, Jr.
Assistant Examiner—Sharon D. Logan
Attorney, Agent, or Firm—Antonelli, Terry & Wands
A proximity switch with a noncontact effect which includes a plug-in adapter having a plug-in socket for the sensor part equipped with a plug-in cable, a ac/dc converter with a core coil connected in front thereof being arranged in the adapter. The adapter is associated with a dc/ac converter located in the basic housing of the main part and includes a core coil connected thereafter. The core coil lie in each case behind the mounting sides of the basic housing and plug-in adapter and transmit by inductive coupling the energy from the main part to the connected sensor part and the signals from the sensor part to the main part.
5 Claims, 4 Drawing Sheets