United States Patent [19] [11] Patent Number: 4,864,156
Tigges et al. [45] Date of Patent: Sep. 5, 1989
US. Patent Sep. 5,1989 Sheet 1 of 4 4,864,156
[54] PROXIMITY SWITCH WITH NONCONTACT EFFECT
[75] Inventors: Burkhard Tigges, Sundern; Dierk
Brasse, Schalksmuehle, both of Fed.
Rep. of Germany
[73] Assignee: Werner Turck GmbH & Co. KG.,
Halver, Fed. Rep. of Germany
[21] Appl. No.: 232,468
[22] Filed: Aug. 15, 1988
[30] Foreign Application Priority Data Aug. 13, 1987 [DE] Fed. Rep. of Germany 8711035
[51] Int. CI.4 H01H 35/00
[52] U.S. CI 307/117; 340/565;
307/116
[58] Field of Search 307/117, 116; 340/565;
361/181
[56] 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
[57] ABSTRACT
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
