438,345. Centrifugal fans. ALLEN, R. W., Queen's Engineering Works, Bedford. July 29, 1935, No. 21543. Addition to 418,350. [Class 110 (i)] A fan discharge comprises a pair of plates 6 for adjusting the area and a pair of plates 9 for adjusting the direction. The curved plates 6 are carried by sectoral plates 4 which are pivoted at 5. The plates 9 have curved ends 10 which contact with the plates 6. They are carried by side plates 11 which are pivoted to the plates 4 by means of the bolts 7. These bolts lock the plates 4.
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