. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. for tightening at D. This chain passes round and is fixed to a pulley E, upon the base of theswinging jib F, and serves to move the jib round by the action of either cylinder alternately. Theslide-valve G admits water to either cylinder, and is moved by a lever H, which is centred at thebottom of the joint pin of the jib. The valve is thus opened by the attendant moving the lever toany position in its q[uadrant, while the actual swinging of the jib shuts it again, in the same 1454. 1455. =LJ^ 1456.
. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. for tightening at D. This chain passes round and is fixed to a pulley E, upon the base of theswinging jib F, and serves to move the jib round by the action of either cylinder alternately. Theslide-valve G admits water to either cylinder, and is moved by a lever H, which is centred at thebottom of the joint pin of the jib. The valve is thus opened by the attendant moving the lever toany position in its q[uadrant, while the actual swinging of the jib shuts it again, in the same 1454. 1455. =LJ^ 1456. manner as in the valve gear of the reversing or steering apparatus. By having adjustable stops inthe quadrant, the jib can always be swung by power exactly plumb over the centre of the hold ofany craft alongside. In all the above plans of hydraulic machinery, the pumping engines, steam accumulator, andtank are all placed in the engine room. The tank is charged with water mixed with methylatedspirit, to the strength sufficient for resisting frost; or other fluids are employed, of which there areseveral suitable for the purpose. The fluid is led along a pressure main from the winch furthestaft to the hydraulic engine on the capstan, with branches and stop-valves connecting the diflerenthydraulic machines; and it is returned again by an exhaust main into the tank, which is closedwater-tight to prevent evaporation, one charge of fluid being thus worked continuously. The HYDEAULICS. 747 1457. pressure mains are of wrought iron, put together with right-and-left-handed screwed cou
Size: 2130px × 1173px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
