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Apparatus for detecting metal debris particles

  • US 4,677,425 A
  • Filed: 04/08/1985
  • Issued: 06/30/1987
  • Est. Priority Date: 04/17/1984
  • Status: Expired due to Fees
First Claim
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1. An apparatus for detecting conductive metal debris particles in a fluid flowing in machinery, comprising:

  • an electrically insulating member having a first and second side interposed in such flowing fluid with such flowing fluid directed towards said first side of said member,a plurality of first electrically conductive means disposed on said first side of said member,a plurality of second electrically conductive means disposed on said first side of said member,a plurality of third electrically conductive means disposed on said second side of said member,a plurality of first openings through said member sized to allow passage of such fluid therethrough while preventing the passage therethrough of any such particles of at least a preselected size and disposed adjacent said first and second conductive means to provide at least a portion of said first and second conductive means at the periphery of each of said first openings,a plurality of second openings through said member sized to allow passage of such fluid therethrough and disposed to provide direct electrical interconnection between each of said second conductive means and each of said third conductive means through said second openings, andcircuit means electrically interconnected with each of said plurality of said first means and each of said plurality of said third means to provide a signal when such a particle of said at least a preselected size is trapped in or across any of said first openings.

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