Tubular aircraft members have their ends shaped to the form of a fork with two oppositely disposed partly flat tapering prongs stabilised by a bridge‐piece having flat ends lying on and rigidly connected to the flat ends of the prongs. Fig. 1 shows a tube 1 having an end shaped to form prongs 2,3 between which a fluted bridge‐piece 4 (Fig. 2) is secured by rivets 7 which also serve to secure external reinforcing members 10 riveted to tube 1 at 11. Fig. 3 shows a means for connnecting a number of mutually inclined tubular members to a main member 12 of tubular or other section. A ∪‐shaped bridge‐piece 13 is bolted to member 12 and members 18, 19 shaped as shown in Fig. 1 are bolted between flat sides 15 of bridge‐piece 13 so as to lie in the same plane with member 12. Further tubular members may be connected to tube 12 in a similar manner but in a plane at right‐angles to the containing tubes 18, 19 by means of a second ∪‐piece 29 secured to a flat side of ∪‐piece 13 by the bolts which secure the latter to member 12. ∪‐piece 13 is fluted and apertured as shown. ∪‐piece 29 is offset on bolts 22 to bring as great an area of its base on the flat side 15 of ∪‐piece 13. The tubular member may be formed by bending steel strip, causing the edges to approach one another. These edges may or may not be connected together.
(1933), "Month in the Patent Office: A Selection of the More Important Aircraft and Engine Specifications Published Recently", Aircraft Engineering and Aerospace Technology, Vol. 5 No. 10, pp. 246-246. https://doi.org/10.1108/eb029732
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