B - Operations – Transporting – 08 – B
Patent
B - Operations, Transporting
08
B
B08B 15/02 (2006.01) E06B 5/10 (2006.01)
Patent
CA 2331667
A fume hood control apparatus for controlling the flow of air through the fume hood in a manner whereby the effective size of the total opening to the fume hood, including the portion of the opening that is not covered by one or more sash doors will have a relatively constant average face velocity of air moving into the fume hood. The apparatus includes a simple and reliable sash door sensing means for sensing the position of the moveable sash door by using a rotary position sensor with a lever arm mechanism which translates horizontal or vertical movement to rotary movement for determining the position of the sash door. The apparatus compensates for nonlinearity that result from the translation.
Oyen Wiggs Green & Mutala_llp
Siemens Building Technologies Inc.
LandOfFree
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