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
DISCHARGING BY MEANS OF SKIPS AND GRABS 417
the year 1912. It is intended for handling both ore and coal, but only the section for
handling ore has so far been completed. It consists of four machines, one of which is
shown in Fig. 588. The entire machine is mounted on four rails, and has altogether
thirty-two wheels, which have been grouped into eight bogies. Fig. 589 shows one side
Fig. 589. Portion of Structure supporting Hulett Unloader.
of the lower structure. The travelling gear receives motion from an electro-motor of
150 H.P. (at 450 revolutions). The carriage of the unloader proper, which travels on this
structure, has twelve wheels in front and four at the rear end, and there are also at the
Fig. 590. Hulett Unloader Depositing into Portable Bunker.
back two further wheels which press against a rail above in case of a tilting of the
apparatus. The carriage of the unloader supports a balance beam, which carries the
unloader itself on its vertical iron arm, whilst the winding gear is situated at the rear end
of the beam.
The winding drum of the lifting gear is manipulated by a 300 H.P. electro-motor
•and electro-magnetic brakes. Four 1^-in. cables are connected to the drum, and lead
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