Proximity switch, which indicates the presence or absence of field changing objects at a defined distance from the proximity switch by a binary signal with the aid of excitation and detection of a field

  • US 4,502,042 A
  • Filed: 03/18/1982
  • Issued: 02/26/1985
  • Est. Priority Date: 03/30/1981
  • Status: Expired due to Fees
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