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APPARATUS FOR INDICATING THE RATE OF FLUID FLOW

  • US 3,797,480 A
  • Filed: 05/28/1971
  • Issued: 03/19/1974
  • Est. Priority Date: 05/29/1970
  • Status: Expired due to Term
First Claim
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1. Apparatus for indicating the rate of flow of fluid through a duct, comprising in combination:

  • a duct;

    a mesh member mounted within the duct so as to define a plurality of flow restricting orifices;

    a heat sensitive electrical resistance element being carried by said mesh member;

    an indicating element;

    a voltage source; and

    means connecting said electrical resistance element, said indicating element and said voltage source together to form an electrical circuit in which an indicating signal is to be generated, the apparatus being arranged so that, during use, the flow of fluid to be indicated flows past said electrical resistance element and through the orifices of said mesh member, the electrical resistance of said element being dependent upon the rate of flow of fluid through the orifice of said mesh member.

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