GB100550A - Improvements in Gripping Appliances Suitable for Lifting Cylindrical Articles. - Google Patents

Abstract

100,550. Delloye, L. H., and Soc. Anon. des Manufactures des Glaces et Produits Chimiques de St Gobain, Chauny, et Cirey. Jan. 21, 1916. Addition to 12567/11 and 8780/13. Lifting-dogs and the like.-A lifting-dog of the type described in the parent Specification 12567/11 and naving automatic means for controlling the gripping operation, as described in the parent Specification 8780/13, is provided with pivoted jaws for gripping shells or other cylindrical objects in an horizontal or vertical position, and with means for centring the objects in the dog before lifting. The arms l, m are pivoted between plates n and are closed on to the load by the upward motion of a wedge member j formed on the shackle j<1>. The arms have rollers at their upper ends bearing on the wedge between the cheek plates p, the rollers being pulled inwards by a spring o connecting their pivots. For lifting horizontal cylinders, Fig. 2, pairs of jaw plates B are pivoted on the arms, these having gripping-surfaces of the same curvature as that of the load. The pivots B<1> are located below the level X-X of the centre of the cylinder, and rivets B<2> prevent the jaws from falling inwards too far when the load is removed. For centring the load, a plate A<1> is secured to each of the cheeks p by angles A. These plates extend out from the cheeks parallel to the axis of the load and have cam-surfaces on the outer extremities of their undersides so formed that, if the dog descends on an horizontally-placed load with the jaws not perpendicular to its axis, the plates A, by bearing on the cylinder, will turn the whole dog until its plane is normal to the load axis. The form shown in Fig. 4 is for lifting vertically-placed cylindrical loads, and has angular jaws E, the portions E<1> of which rest on the base of the shell or other object. The centring-members consist of downwardly-pointing L-shaped plates D secured to the cheeks p by angle-plates A and having their inner pendent faces chamfered to centre the dog as it is lowered on to the load. In both forms of the device, the action of the wedge j upon the arms is controlled by an octagon-headed pin q' with a ratchet-wheel and two slots at right-angles in its head for the free passage of a hook q<3> fixed to the cheek plate p as described in the parent Specification 8780/13.