Non-contact operating proximity switch

• US 4,757,213 A
• Filed: 05/15/1987
• Issued: 07/12/1988
• Est. Priority Date: 05/15/1986
• Status: Expired due to Fees

• Current Assignee: Werner Turck GmbH & Co. KG (Turck Holding GmbH)
• Original Assignee: Werner Turch GmbH & Company KG
• Inventors: Brasse, Dierk, Tigges, Burkhard
• Primary Examiner(s): Shoop, Jr., William M.
• Assistant Examiner(s): IP, SHIK LUEN PAUL
• Application Number:
  US07/049,936
• Time in Patent Office: 424 Days
• Field of Search: 307/112, 307/113, 307/114, 307/115, 307/116, 307/117, 200/19 L, 200/19 M, 200/67 F, 200/64, 200/61.45 M, 200/61.54, 200/61.67, 200/61.68, 361/179, 361/180, 361/183, 361/203, 361/204, 361/206, 340/547, 340/551, 340/552, 340/567, 70/276, 70/277, 70/439, 324/160, 324/173, 324/174, 324/179, 324/166, 324/162, 324/163, 324/164, 324/171, 174/50, 174/52 R
• US Class Current: 307/116
• CPC Class Codes: H03K 17/9522 with a galvanically isolated probe

Abstract

A proximity switch operating on a non-contact basis including a terminal-side main part set in a base housing and a sensor part set in a probe. To enable a selection of the response direction, the probe may be adjusted in different positions on the base housing, to which the probe is designed or arranged as a component insulated on all sides which, by way of individual in-built core coils is inductively coupled with a core coil set in the base housing.

Claims

1. A non-contract proximity switch, with a direct current circuit arrangement lying between an input portion and a sensor field producing means including a terminal-side main portion set in a base housing and a sensor portion arranged in a probe, said probe being adapted to be selectively set in different predetermined positions on the base housing of the main portion for enabling a selection of a response direction, means for insulating the probe on all sides thereof, said main portion includes a direct current/alternating current transformer with a core coil, the sensor portion includes an alternating current/direct current transformer with an added core coil, and wherein the core coils are disposed behind both a fastening side of the base housing and the probe whereby, when the probe is released from inductive coupling, energy carries over from the main portion to the sensor portion and provides output signals from the sensor portion to the main portion, said probe is cube-shaped and includes a fastening side adjacent a response side thereof and fastening side disposed in opposition to the response side, and wherein a core coil is mounted on each of the fastening sides, with the core coils being attached to the same alternating current/direct current transformer

2. A proximity switch according to claim 1, wherein the base housing of the main portion is provided with a dovetail pocket on the fastening side, and said probe includes a quadratically shaped head on at least one of the sides of the cube-shaped probe, said quadratically shaped head being undercut on all sides and being adapted to be inserted into the dovetail pocket.

3. A proximity switch according to claim 2, wherein pressure plate means are provided for closing an open end of the dovetail pocket.