×

Smoke detectors utilizing a hydrophilic substance

  • US 5,781,291 A
  • Filed: 10/22/1996
  • Issued: 07/14/1998
  • Est. Priority Date: 10/22/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. An ambient condition detector comprising:

  • a housing which defines a sensing region;

    a source for projecting a beam of radiant energy into the region;

    a sensor carried by said housing for converting scattered radiant energy incident thereon to a corresponding electrical signal wherein the housing carries an element which is selected from a class which includes a surfactant containing plastic, a surfactant coated plastic, and a porous plastic which incorporates a hydrophilic substance.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×