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Remote acoustical sensor

  • US 3,214,974 A
  • Filed: 12/18/1963
  • Issued: 11/02/1965
  • Est. Priority Date: 12/18/1963
  • Status: Expired due to Term
First Claim
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1. APPARATUS FOR THE MEASUREING OF THE LEVEL OF A LIQUID WITHIN A VESSEL COMPRISING (A) GENERATOR MEANS LOCATED UNDERNEATH SAID VESSEL FOR PRODUCING A SOUND PULSE THROUGH THE WALL OF SAID VESSEL INTO SAID LIQUID IN AN UPWARD DIRECTION;

  • AND (B) REFLECTOR MEANS PARTIALY IMMERSED IN SAID LIQUID HAVING STEPPED, FLAT SURFACES FACING SID GENERATOR MEANS TO REFLECT A SERIES OF SAPCED SOUND PULSES FROM THE SUBMERGED SURFACES, THE NUMBER OF REFLECTED SOUND PULSES THEREBY INDICATING THE LEVEL OF SAID LIQUID WITHIN SAID VESSEL;

    (C) SAID REFLECTOR MEANS CONSISTING OF A SHAFT HAVING SPIRALLY ARRANGED, WEDGE SHAPED STEPS TO FORM A COMPACT DEVICE OCCUPYING A MINIMUM OF SPACE WITHIN SAID VESSEL.

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