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Device for the detection of noxious substances in the air supplied to a compartment occupied by people

  • US 4,742,763 A
  • Filed: 12/10/1986
  • Issued: 05/10/1988
  • Est. Priority Date: 04/23/1985
  • Status: Expired due to Fees
First Claim
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1. A device for the detection of noxious substances in air being supplied to a compartment occupied by people, said detection device comprising:

  • a housing centered on an upright axis and adapted to be traversed by an air flow to be analyzed;

    a first air chamber formed in said housing;

    a second air chamber formed in said housing upstream of said first chamber, said second chamber being cylindrical and centered on said axis;

    a sensor disposed in said first chamber;

    a measuring slot formed in a wall of said housing separating said first and second chambers, said measuring slot being upstream of said sensor and in registration therewith for directing said air flow against said sensor;

    a pulsator disposed in said second chamber for controlling said air flow through said housing to insure a constant air flushing of said sensor;

    at least one air inlet formed in said housing and opening into said second chamber upstream of said pulsator for the admission of air into said second chamber; and

    at least one first air outlet formed in said housing at one end thereof and opening into said first chamber downstream of said sensor for venting said air flow from said first chamber.

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