Airport-closure device in which all advantages of mechanically operated window are incorporated in circular port has been developed by Kearfott Engineering Co., New York, N. Y.; disadvantages of usual hinged type of port are eliminated inasmuch as portclosure member rolls upward into port casing instead of hinging outward into limited space of cabin; weathertightness is obtainable without clamping screws; operation through turning of handle.
A rolling airport-closure device
Mar. Eng. Shipg. Age
Marine Engineering and Shipping Age ; 34 , n 4
1929
2 pages
3 Figs.
Article (Journal)
English
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