The Mechanical Handling and Storing of Material
Forfatter: A.-M.Inst.C E., George Frederick Zimmer
År: 1916
Forlag: Crosby Lockwood and Son
Sted: London
Sider: 752
UDK: 621.87 Zim, 621.86 Zim
Being a Treatise on the Handling and Storing of Material such as Grain, Coal, Ore, Timber, Etc., by Automatic or Semi-Automatic Machinery, together with the Various Accessories used in the Manipulation of such Plant
Søgning i bogen
Den bedste måde at søge i bogen er ved at downloade PDF'en og søge i den.
Derved får du fremhævet ordene visuelt direkte på billedet af siden.
Digitaliseret bog
Bogens tekst er maskinlæst, så der kan være en del fejl og mangler.
COAL TIPS OK HOISTS
557
The sidings are so arranged in connection with these tips as to facilitate the mixing
of coal and ensure rapid dispatch. Provision is made by which all wagons are weighed
when coming in and reweighed when going out, the exact weight of the coal thus being
ascertained, no matter what the tare of the wagons may be. The sidings are so laid out
that a full train can be put upon either. They will together hold a cargo for a steamer
of 2,500 tons, and are so constructed, with a slight rising gradient to the centre, and a
falling gradient thence to the tip, that the men engaged at the tips manipulate the whole
train load and work it down without the assistance of locomotives.
The capacity of these tips as regards dispatch may be gathered from the following
data :—•
On 23rd May'1901 the S.S. “Gatesgarth” arrived in the dock at 8.10 on the
morning tide, and immediately proceeded to the four-tip berth. After bunkering with
one tip, she commenced to take in her cargo at 9.15 a.m., finished at 11.50 a.m., and
Figs. 782 and 783. Thomas’s Anti-Breakage Box.
sailed on the same tide, having taken on board a cargo of 2,333 tons in two hours and
thirty-five minutes. On 26th July 1901 the S.S. “Bangarth” arrived in the dock at
11.45, and at 11.55 all four tips were at work, and she was charged with 2,154 tons
of coal by 1.55, z>., in two hours.
Thomas’s Anti-Breakage Box.—This is the invention of Mr S. Thomas, dock
superintendent at Penarth, and is illustrated in Figs. 782 and 783. It has a capacity of
2-~ tons, the main object of its design being non-breakage of coal when working rapidly.
It is in two sections, a and B, which hang vertically from the same bridle c, and are
hinged together near the top of the box, being so arranged that when the box is empty
the act of lifting it by a rope causes the box to close automatically, and it is closed while
being loaded under the shoot of the tip. An auxiliary rope is attached by an eye-bolt
and chain to the heavier half of the box, and passes up to the end of the jib of the crane
which works the box, passing thence over a sheave on the outside of the jib, while the
end is brought back down to the deck of the ship, where it is fastened at any
desired length.