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
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712
THE MECHANICAL HANDLING OF MATERIAL
lever L which, by catching the striking bolt c8, opens the door c7; this remains open
until all the material has been discharged, when the door swings to again and the
striking bolt cs coming down depresses the lever l, which starts the whole operation
over again.
It will be noticed that when the weight of the grain in the hopper c exactly
balances the weights in the box d, the valve G immediately shuts, but the grain in
suspension at the time falls into the hopper and would be overweight were it not
compensated for by an adjustable weight s on the bar Sj which rests on the beam
during the weighing operation, but afterwards catches a stop on the frame so that the
beam finally swings clear of all the working parts, and conclusively proves that there
is a perfect balance.
Figs. 1019 and 1020. Avery’s Automatic Weighing Machine for Sacking-off Purposes.
The ordinary register or counting apparatus Q is so attached to the lever l as to
keep a record of the number of weighings performed by the scale.
Figs. 1017 and 1018 show one way in which the Avery Weighing Machine
is installed in warehouses, etc., for the purpose of weighing grain in bulk. The grain
is received, elevated to the top of the warehouse, and carried by means of band or
other conveyors to the silos. The illustration shows the elevator, and also indicates the
position of the weighing machine between this apparatus and the conveyor which
further disposes of the grain.
The scale is placed on a suitable staging, and fitted with a feed hopper above and
a discharge hopper below, each of which are of a capacity slightly in excess of that of
the weigh hopper of the machine. The spout from the elevator leads into the feed
hopper, and after the grain has passed through the scale and been weighed and
registered, it drops into the discharge hopper, whence it falls gradually on to the con-
veyor which distributes the grain to the silos. The opening in the hopper can be so
adjusted as to feed the conveyor gradually.