Transactions . tre of the wheel, projecting several inches beyondeach side. A connecting bar or rod unites each end of this axle?with the ends of the journals below, at a distance equal to the entirelift of the crane, thus allowing swinging motion in the direction ofthe length of the tramway. When in any case vertical space is morelimited, the room available may be economized by the followingmodification of the lift. The head of the lift may be moved as close to the bottom ofthe crane-arm or tramway as will allow it to swing free. Thestuffing-box, etc., may be transferred to the bottom of the
Transactions . tre of the wheel, projecting several inches beyondeach side. A connecting bar or rod unites each end of this axle?with the ends of the journals below, at a distance equal to the entirelift of the crane, thus allowing swinging motion in the direction ofthe length of the tramway. When in any case vertical space is morelimited, the room available may be economized by the followingmodification of the lift. The head of the lift may be moved as close to the bottom ofthe crane-arm or tramway as will allow it to swing free. Thestuffing-box, etc., may be transferred to the bottom of the outsidecylinder, which is thus left open at the top, and a regular pistonhead fitted to the top of the plunger, which thus plays in the outsidecylinder. The piston is prevented from rising too far by a disk fast-ened below, as in the first form, which in turn carries the hook asbefore. For a double tramway, with two wheels on each side, thejournals of the lift or crane play in a rectangular frame, in bearings. of the ordinary kind, motion in every plane being secured by the useof a second rectangular frame in which the first frame hangs sus-pended at right angles to the axis of the journals suspending the liftproper, thus securing a universal pivot. This second frame is at- IMPROVED SUSPENDED HYDEAULIC LIFT. 305 tached to wheels resting on the tramway. In order to save frictionthese wheels should be of good size, and provided with friction rolls. The outside cylinder is tapped at the lowest convenient point onits side, and a piece of common iron pipe inserted, and into this shortpipe is fastened ordinary rubber hose. The water is forced into thebottom of the cylinder through the rubber hose by the usual meansto accomplish such a ])urpose. For use on an overhead railway, crane-arras, etc., the rubber hoseis carried still higher, and is suspended by a chain attached to a
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
