G - Physics – 01 – N
Patent
G - Physics
01
N
183/107, 73/97
G01N 1/24 (2006.01) G01N 1/22 (2006.01)
Patent
CA 1145686
AIR SAMPLING APPARATUS Abstract of the Disclosure: Air sampling apparatus having a housing covered by a roof which creates a passageway between the housing and the roof. The housing has an open upper end and a plate with a hole through it for mounting a filter and a blower by which air is drawn through the filter. A cover plate for the filter is provided with means for removing the plate when air is to be drawn through the filter and replacing the plate over the filter when the air blower is inoperative.
356967
Macrae & Co.
Tisch Wilbur P.
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