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
140
THE MECHANICAL HANDLING OF MATERIAL
whole conveyor can be driven by a belt 1| in. wide, the power absorbed being unexpectedly
small. The skips travelling in one direction from the spinning rooms to the conditioning
' 4
i Fig. 193. Gravity Con-
p I veyor for Large Indi
vidual Loads.
cellar, balance those returning in the opposite
direction to the winding room, where they
are taken off by lads. Thus the resistance
is chiefly frictional.
By providing finger trays on the chains
and special grids at the feeding and discharge
points, it is often feasible to arrange for
the automatic picking up and delivery of
packages. An example with the adoption
of the finger tray system is given in Fig. 195.
This takes bundles of loose newspapers from
the printing room to the dispatch room of a
London daily paper. Here, on account of
the available floor space in the printing room
being limited, it was necessary to run the
conveyor in a tunnel below the floor, a
cross section being shown in Fig. 196. The
carriers are 6 ft. apart, and the capacity of
the machine is twelve bundles per minute,
or 720 per hour, equal to about 173,000
copies per hour. It runs night and day with
intervals of rest.
This analysis of the different types of
package conveyors will be concluded by
reference to a special form of pivoted or
tipping carrier conveyor, provided with dis-
charging mechanism, which can be thrown
into gear at pleasure for tipping out the
contents of the carriers at several delivery
points, as shown at a, b and c in Figs. 197
and 198. It was erected in the year 1907
for the Gourock Ropework Co., Ltd., Port-Glasgow, for conveying bobbins 8 in. diameter
and weighing 13 lb. each, at the rate of 400 per hour. The length is about 150 ft.