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Particle monitoring apparatus

  • US 3,989,311 A
  • Filed: 06/30/1972
  • Issued: 11/02/1976
  • Est. Priority Date: 05/14/1970
  • Status: Expired due to Term
First Claim
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1. An apparatus for sensing materials moving with a flowing fluid comprising:

  • housing means having a wall surrounding a chamber, an inlet passage means connected to the chamber and an outlet passage means connected to the chamber, said outlet passage means being angularly disposed with respect to the inlet passage means for carrying moving fluid and particles entrained in the fluid, said wall having an opening in longitudinal communication with the inlet passage, particle sensing means mounted on said housing means, said particle sensing means having first means located in said opening of the wall and closing said opening without projecting into said chamber, said first means including a member in general longitudinal alignment with the inlet passage means upon which substantially all of the particles moving through the chamber impinge and thereby produce a mechanical signal, barrier means located adjacent the first means to limit the size of particle that can impinge on the first means, second means cooperating with said first means to pick up the mechanical signal and transform said mechanical signal to an electrical signal, output means for receiving the electrical signal and producing readable information related to particle impaction on the first means.

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