| 摘要 |
532,145. Making aeroplane wings, boats and hollow wooden structures. COUSTOLLE, J. G. Aug. 17, 1939, No. 23782. Convention date, Sept. 5, 1938. [Class 61 (ii)] [Also in Group XXXIII] A hollow wooden structure is formed by assembling the envelope of the structure in a mould and securing the frame members thereto while still in the mould, structures large enough for a man to work inside being built-up in a one part mould whilst smaller structures are formed in halves. For building up the half of an aeroplane fuselage, Fig. 1, the envelope b of plywood is laid in the mould a, the frame members c are glued thereto and if desired side members d of plywood are glued to the members c; longitudinal members e are provided for securing the two halves of the fuselage together. Fig. 5 shows the introduction of the upper section of a wing formed of plywood covering b, ribs, spars &c. c, stiffening members d and leading and trailing edge parts g, the wing being completed by gluing on another plywood covering b. Masts, shells, floats, tail sets &c. may be similarly formed, also boats and rafts. Local deformation of the envelope due to heat &c. may be covered by gluing thereto light material such as cork, balsa wood, porous vulcanite &c. and where fittings are to be secured to the frame members hard plywood may be interposed. |
