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    • 5. 发明专利
    • Improvements in and relating to Whiffletrees.
    • GB191027952A
    • 1911-06-08
    • GB191027952D
    • 1910-12-01
    • DAVEY RUSSELL GEORGE
    • DAVEY RUSSELL GEORGE
    • B62C5/04B64C5/04
    • 27,952. Davey, R. G. Dec. 1. Whipple-trees. - The double-tree and singletrees of a horse-draught appliance are constructed with pairs of bars having reinforcing- members, the reinforcing-members of the doubletree acting as stops for the inner ends of the single-trees, and means are provided for enabling the double-tree to be attached to the pole or to different forms of tug connexions. The double-tree and single-trees are each constructed with two preferably metal bars 2 , 12 bowed apart at the centre as shown in Fig. 1. Pivoted between the bars of the double-tree is a clevis 4 having a hole 6 at one end and a swivelling hook 7 at the other to enable it to be attached to different forms of tug connexions. When it is required to attach the doubletree to a pole, the clevis is turned to lie between the bars 2 , and a pin is passed through holes 10 in the bars and through the clevis into the pole. The single-trees have eyes 14, which are connected to the double-tree by U-shaped pieces 13. The single-trees are reinforced by U-shaped plates 18 extending their whole length, and the double-tree by short pieces 19 which also act as stops for the single-trees.