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George Cameron Douglas
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Structures Of Non-Positive Displacement Pumps
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Abstract
26,117. Douglas, G. C. Dec. 15. Fans.-To induce an updraught in a ventilating-shaft or the like, a fan 4 in a rotary cowl 3 is mounted on the same shaft 5 as an external fan 7 which is made to rotate by the wind. The external fan is also said to act as a vane to turn the cowl, which is not provided with h a fixed directing-vane.
GB190526117D1905-12-151905-12-15Improvements in Ventilating Cowls.
ExpiredGB190526117A
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