G - Physics – 01 – M
Patent
G - Physics
01
M
116/66.1
G01M 3/20 (2006.01) B01D 46/44 (2006.01) G01M 3/00 (2006.01)
Patent
CA 1207606
Abstract of the Disclosure A novel filter testing apparatus and method are provided wherein a challenge aerosol or the like is introduced upstream of the filter, and the downstream face of the filter is scanned with an air sampling probe to detect for the presence of leaking aerosol. The novel apparatus comprises a generally rectangular frame, and an air sampling probe which is mounted to the frame so as to be movable in a predetermined pattern wherein the entire face of an ad- jacent filter is scanned. The assembly may be removably mounted in a filter housing immediately downstream of the filter, or mounted on a framework down- stream of a bank of several filters. In the latter instance, means are provided for sequentially indexing the assembly to a position alignment with each filter, and an upstream aerosol dispersion assembly is also provided which is cor- respondingly indexed across the filter bank. Means are also provided for con- tinuously plotting the rate of leaking challenge aerosol on a moving sheet of paper, to thereby permit the magnitude of a leak and its location on the face of the filter to be readily determined. Means and method are provided for applying a visible dye onto the face of the filter upon the rate of leaking challenge material exceeding a predetermined minimum, the dye being applied closely adjacent the leak to identify its location.
432369
Allan Thomas T.
Bowers Cecil W.
Thompson Ivey G.
Flanders Filters Inc.
Smart & Biggar
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