The Viaduct Works' Handbook
Forfatter: Henry N. Maynard
År: 1868
Forlag: E. And F. N. Spon
Sted: London
Sider: 108
UDK: 624.3
Being A Collection Of Examples From Actual Practice Of Viaducts, Bridges, Roofs, And Other Structures In Iron; Together With Tables Of Prices, Weights, And Other Information Useful To Engineers In Design And Estimating Wrought And Cast-Iron Work
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98
cylinder, having a piston fitting somewhat loosely in it, the piston
rod terminating with an eye at its upper end, to which a chain may
be attached for working it ; the bottom of the wrought-iron cylinder is
formed by a wrought-iron plate, and is attached to the sides by cottar
bolts passing through projecting lugs (as shown in the drawing),—
these lugs are so arranged as to admit of easy removal of the bottom;
in the centre of the bottom plate a vertical tube is inserted, project-
ing outwards for a distance equal to its own diameter, and inwards
far enough to reach nearly to the top of the wrought-iron cylinder.
The mode of working may be explained as follows :—The machine
is lowered by a winch or steam hoist (by means of sling chains being
attached to lugs at the upper portion of its circumference) into the
pile to be sunk, when the projecting tube partly enters the soil; a