Patent GB-190427760-A (GB)
Title: Improvements in Apparatus for Loading and Discharging.
Inventor: LIVINGSTON THOMAS LINTON
Filed: 1904-12-19
Granted: 1905-12-14
Abstract: 27,760. Livingston, T. L. Dec. 19. Cranes and winches, arrangement of.-Relates to loading and discharging apparatus of the type described in Specification No. 4063, A.D. 1904, [Abridgment Class Lifting &c.]. Figs. 1 and 2 show one arrangement of the apparatus in which a beam a carrying winding-pulleys is supported by brackets c at the top of spars b, which rotate about pins d mounted in side frames e on either side of, and parallel to the length of, the hatchway. To raise the framework and spars, the winch g winds in the rope h, which is attached at one end to one of the winch barrels and thence passes around one pulley of the block i to guidepulleys h<2> on opposite sides of the hatchway, and finally passes around a second pulley-block opposite i to a fixed point on the deck or to a second barrel of the winch g. Connecting-ropes j at each side of the apparatus pass from eyes on the brackets c between guide-pulleys l, q, fixed on the standards e, around the remaining pulley of the block i, thence between guide-pulleys q, m, and afterwards between one pair of a series of guide-pulleys n, fixed on brackets r on the spars b, to a loose pulley o on the shaft d provided with a weighty for taking up slack. The guide-pulleys n have a portion of their flanges cut away, so that the rope can be readily taken out and placed between another pair of the series as the inclination or list of the vessel alters. The load is raised or lowered from the beam a by ropes l, fixed at one end to the beam a or to winding-barrels 2, and passing around pulleys 3 to barrels 4 of loosely-mounted compound drums having their other barrels 5 connected to a barrel on the winch g by ropes 6 passing over guide-pulleys 6<a>, 7. The pulleyblocks 3 are in this case secured to the ends of a beam 8 which carries a bar 9 supporting the packages 10. The spars and loaded beam are raised from the hatchway into an approximately vertical position by the winch, so that the weight of the load can lower the beam on to the discharging-place 11 on the winding-ropes being again paid out. The unloaded apparatus is raised by ,the winch past its mid-position and then is lowered into the hatchway by the action of counterweights s adjustably connected to the feet of the spars b by pins t fitting in holes u on the spars. Fig. 6 shows a modified form of apparatus with the standards e of adjacent sets of apparatus increased in height and connected by beams 12 forming guides for travelling blocks 13 positioned and secured by ropes 14. The beam a is moved by the rope 16 passing from the winch g over the guide-pulleys 17, 13 to pulleys 18, mounted on extending arms of the curved spars b, and thence round similarly-situated guide-pulleys at the other side of the apparatus, finally passing to a single weighted pulley o. Guide-pulleys 20, 6<b> are provided to support the ropes 16, 6, respectively, when the apparatus is lowered into the hatchway. In another form, the pulleys corresponding to 18, Fig. 6, are movable in arcuate guides at the top of the curved spars. Two ropes on opposite sides of the apparatus are secured to weighted pulleys o, or one may be secured to a fixed eye, and are secured at their other ends to the framework of suspended pulleyblocks. The winding-rope passes from the winch around one of the pulleys of these suspended blocks and thence to a guide-pulley mounted on the framework of the adjacent set of apparatus, after which it is returned to a guide-pulley mounted on the connecting-beam 12, whence it passes over the movable pulleys at the spar-heads and afterwards around corresponding guide-pulleys at the other end of the beam a to the other suspended pulley, finally passing to a fixed point on the vessel. No provision is made in this case for hoisting or lowering the load to and from the beam a, but the supporting-slings may have their length adjusted as required.