G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 15/06 (2006.01) G01N 15/10 (2006.01) G01N 27/22 (2006.01)
Patent
CA 2222835
There is provided a detector for detecting conductive contaminants entrained in an airflow. The detector comprises first and second electrically conductive meshes mounted in a spaced apart relationship to provide an operational gap. Each of the meshes is sized to provide a relatively large surface for substantially intersecting the airflow and is sufficiently porous so as not to substantially attenuate the airflow. The meshes form part of an energizable electric circuit wherein the operational gap constitutes a discontinuity of the circuit. The detector includes a capacitor connected in parallel to the portion of the circuit containing the operational gap. There is a release of a charge stored in the capacitor through the circuit discontinuity when one of the conductive contaminants simultaneously contacts the first and second meshes. The detector further provides for indication of the discharge of the capacitor and thereby the presence of one of the airborne conductive contaminants entrained in the airflow.
Arrowsmith Peter
Duff John D.
Blake Cassels & Graydon Llp
Celestica Inc.
Celestica International Inc.
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