Month in the Patent Office: A Selection of the More Important Aircraft and Engine Specifications Published Recently

Aeroplane wings, ailerons, &c., comprising transverse diaphragms carried on spars, have bent metal sections with beaded borders sprung into notches in the diaphragms to form the curved portions of the wing section. Fig. 1 shows an aileron in which composite diaphragms consisting of plates 1, 2, 3, connected by stays 4, 5, 6, are secured to the spar. Notches such as 8, 12 are formed in the plates 1, 2, 3 to take the beaded edges 10 of sections such as that shown in Fig. 3, the surfaces of which are flush with the stays 4, 5, 6 when in position so as to form a smooth support for a fabric covering. The sections are rolled so that they have to be sprung more open as they are fixed in position.