Improvements in and relating to Appliances for Screening, Bagging, and Weighing Coal or other Materials.
Year: 1896

page_text: Date of Application, 12th Nov., 1896-Accepted, 9th Jan., 1897
Improvements in and relating to Appliances for Screening, Bagging,
and Weighing Coal or other Materials.
I, ROBERT TAYLOR, of 57 Yeaman Shore, Dundee, in the County of Forfar,
Coal Merchant, do hereby declare the nature of my invention and in what manner
the same is to be performed to be particularly described and ascertained in and by
the following statement in writing that is to say :-
This invention has reference to and comprises improvements in appliances for
simultaneously screening and discharging or bagging and weighing coals or other
materials, from which it is desirable to separate dust or fine particles, which
appliances may be erected on any suitable foundation or be mounted on a waggon,
or otherwise on wheels, so as to permit of being moved to any desired point, and
which will be very convenient for use in the discharge of coals or other material
from vessels, railway trucks or the like.
And in order that my said invention and the manner of carrying same into effect
or practice may be properly understood I have hereunto appended two sheets of
explanatory drawings in which the same reference letters are used to indicate the
same or equivalent parts in all the figures where shown.
Figure 1 on Sheet 1 is a front elevation partly in section of an appliance in
which the operation of screening is twice performed while Figure 2 is a side
elevation of the same also partly in section.
Figure 3 is a plan of the upper screening gratings and Figure 4 is a plan of the
lower ones.
Figure 5 on Sheet 2 is a front elevation partly in section of an appliance for
screening coal or other material fitted with only one set of screening shoots
Figure 6 is an end elevation also partly in section while Figure 7 is a plan showing
the screens.
Referring to the drawings on Sheet 1, under one arrangement for double
screening, bagging and weighing coal or like materials the appliance which may be
used for receiving coal from vessels alongside a quay or from railway trucks is
constructed as follows:-
A main frame or casing A which may be of a conical form having a rounded
top is erected on any suitable foundation or is carried on a waggon or otherwise
mounted on wheels, and fitted at its upper part with a large hopper A' to receive
the coal discharging into same from the vessel or truck. The lower part of this
hopper A is fitted with angled screening shoots B preferably three in number
having projecting side wings B' and diverging from a plain plate A² on the top of
framing A.
The outer ends of these screening shoots B are supported by the hollow
projecting part A³ of the casing A. These shoots have perforated or grating
bottoms to allow the small coal and dust to fall through and each is fitted at its
upper end with an ordinary sliding door, not shown in the drawings, to shut off the
coal from one or more as desired, and at its lower end with a swivelling door C
formed with triangular side wings C¹ pivotted at their apexes C to the sides of
the shoot B or to the casing A all so as to be swivelled up and down by a handle
to open and close the lower part or mouth of the shoot. The doors C which are
shown fitted to be swivelled upwards to open the shoot may otherwise be fitted to
swivel downwards for the same purpose,

page_text: Beneath the screening shoots B described other angled shoots D with closer
gratings are fitted to receive the small coal and dust passing through from the
shoots B and conduct the small coal, freed from its dust which falls through the
grating, to a receptacle D' whence they may be discharged from the under part of
the casing A in any suitable manner or be received into bags, carts, waggons or
the like. The inner ends of these lower screening shoots D are supported by the
brackets d secured on a partition a within the casing A. The fine dust will fall
through the lower shoots into the interior of the casing A whence it can he
discharged as desired through the shoots E. Underneath each discharging shoot B
a platform weighing machine G is fitted, of any ordinary construction, on which
bags to receive the coal or other material are placed their open mouths being
supported by hooks H such as are shown in Figures 5 and 6 on Sheet 2.
Referring to Sheet 2, Figures 5, 6, and 7 show a modified form of the appliance
in which the coal or other material is screened only once and in which the casing A
is shown of a rectangular form. This casing A is fitted with a rectangular
hopper A and two angled screening shoots B having side plates B₁ and doors C
similar to those already described in reference to Figures 1 and 2. Angled plates I
are fitted below these screening shoots to receive the dust falling through the
screens B and conduct it to the centre part of the casing whence it is discharged as
desired by the shoot J fitted with a swivelling door J', and bags may be suspended
below the mouth of this shoot to receive the dust. Ordinary platform weighing
machines may be fitted at G to weigh the coal as it is filled into the bags.
The details of construction may be slightly modified as by increasing or
decreasing the number of shoots or by using barred gratings for the screening
shoots as shown in Figures 3 and 4 or wire netting as shown in Figure 7 according
to the nature of the material being dealt with.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is :-
First. Appliances for screening, and discharging or bagging and weighing coal
or other material constructed and arranged all substantially as herein described
and shown in the accompanying drawings.
Second. Appliances for separating dust from coal or other material by means of
one or more sets of screens constructed and arranged all substantially as herein
described and shown in the accompanying drawings.
Third. Appliances for double screening and discharging or bagging and weighing
coal or other material constructed and arranged all substantially as herein described
and shown in Figures 1 to 4 of the accompanying drawings.
Fourth. Appliances for screening and discharging or bagging and weighing conl
or other material constructed and arranged all substantially as herein described
and shown in Figures 5 to 7 of the accompanying drawings.
Fifth. In appliances for screening and discharging coal of the kind described
the fitting of the discharging shoots with swivelling doors all substantially as and
for the purposes herein described and shown in Figures 1, 2, 5 and 6 of the
accompanying drawings.
Dated the 11th day of November 1806
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.