Improvements in or connected with Arrangements or Mechanism for Tipping, Screening or Sorting, and Loading Coal.
Year: 1891

page_text: Date of Application, 25th Mar., 1891
Complete Specification Left, 24th Dec., 1891-Accepted, 6th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in or connected with Arrangements or Mechanism
for Tipping, Screening or Sorting, and Loading Coal.
I, FRED SILVESTER, of Thistleberry, Newcastle, in the County of Stafford,
Engineer, do hereby declare the nature of the said invention to be as follows
The mechanism for tipping the waggons of coal, which are. hereinafter termed
"tubs" is of the kind formed by two circular end frames connected together by
bars, the circular end frames are each grooved to rest upon corresponding anti-
friction pulleys, and the tubs pass from one side in the line of the axis on which
the tipping frame or cage rotates, and when tipped, they pass out at the other side
of the tipping frame or cage, the tub being completely rotated, the coal falling
from the tub about when the tipping frame or cage has made half of its rotation.
This tipping frame may be rotated by hand, but my invention consists in causing
it to rotate by power, by a friction pulley or pulleys, on a shaft rotated from the
driving power.
The friction pulley or pulleys, is arranged so as to be pressed against the
V grooves of the tipping frame, when it is to be rotated, and a brake is arranged
to act upon one or both sides of the tipping frame or cage, to arrest its rotation
when it has made one revolution, and stop it in a position in which the empty tub
can be pushed out and a full tub pushed into the tipping frame or cage.
The tubs are brought to the tipping frame or cage on rails on one side of it,
and are taken away when empty, by rails on the other side of the tipping frame or
cage.
There is also an elevator on that side of the tipping frame or cage for empty
tubs, so that the tubs may be lifted to a position to run down an incline in the
direction required, and this elevator is also driven by power.
The coal from the tubs is discharged by the tipper into an inclined shoot, which
conveys it to an inclined screen, the bottom of which (and not the sides or pan) is
moved to and fro and up and down, to riddle the coal and separate the small from
it, and pass on the large, which will not go through the screen and so on to as
many other screens as are required to separate the coal into as many sorts as
desired, the largest size being finally discharged from the screen shoots to railway
or other vehicles coming under the screens and shoots, which convey the coal to
them.
The screens according to my invention separate from the sides or "pan" (which
are fixed), are arranged on arms or shafts, and on levers so as to be moved to and
fro and up and down by excentrics, cranks or other suitable mechanism.
The rotary motion for actuating the tipper, elevator, and screens is from a small
steam engine or any other suitable motor, and the motion is or may be transmitted
from the motor by endless chains, shafting or other suitable means to the mechanism
to be actuated.
Dated this Twenty-fourth day of March 1891.
PETER J. LIVSEY,
Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in or connected with Arrangements or Mechanism
for Tipping, Screening or Sorting, and Loading Coal.
I, FRED SILVESTER, of Thistleberry, Newcastle, in the County of Stafford,
-Engineer, do hereby declare the nature of this invention, and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:-
The mechanism for tipping the waggons of coal, which are hereinafter termed
"tubs" is of the kind formed by two circular end frames connected together by
bars, the circular end frames are each grooved to rest upon corresponding anti-
friction pulleys, and the tubs pass from one side in the line of the axis on which
the tipping frame or cage rotates, and when tipped, they pass out at the other side
of the tipping frame or cage, the tub being completely rotated, the coal falling
from the tub about when the tipping frame or cage has made half of its rotation.
This tipping frame may be rotated by hand, but my invention consists in causing
it to rotate by power, by a friction pulley or pulleys on a shaft, rotated from the
driving gear.
The friction pulley or pulleys is arranged so as to be pressed against the
V groove of the tipping frame, when it is to be rotated, and a brake is or may be
arranged to act upon one or both sides of the tipping frame or cage, to arrest its
rotation when it has made one revolution, and stop it in a position in which the
empty tub can be pushed out and a full tub pushed into the tipping frame or
cage.
The tubs are brought to the tipping frame or cage on rails on one side of it
and are taken away when empty by rails on the other side of the tipping frame or
cage.
There is also an elevator on that side of the tipping frame or cage for empty
tubs, so that the tubs may be lifted to a position to run down an incline by their
own gravity in the direction required, and this elevator is also driven by power.
The coal from the tubs is discharged by the tipper into an inclined shoot, which
conveys it to an inclined screen, the bottom of which (and not the sides or pan) is
moved to and fro and up and down, to riddle the coal and separate the small from
it, and pass on the large, which will not go through the screen and so on to as
many other screens as are required to separate the coal into as many sorts as
desired, the largest size being finally discharged from the screen shoots to railway
or other vehicles coming under the screens and shoots, which convey the coal..to
them.
The screens according to my invention separate from the sides or "pan" (which
are fixed) are arranged on arms or shafts, and on levers so as to be moved to and
fro and up and down by excentrics, cranks or other suitable mechanism.
I have said that the bottom or screen only is moved, but both screen and sides
may be moved together, but I prefer the former as there is less weight to put in
motion.
The rotary motion for actuating the tipper, elevator and screens is from a small
steam engine or any other suitable motor, and the motion is or may be transmitted
from the motor by endless chains, shafting or other suitable means to the mechanism
to be actuated.
Or two separate small motor engines may be used one for the screens and the
other to drive the tipping frame and elevator when used.
Fig. 1 is a side elevation and Fig. 2 a front elevation of my improved combina
tion of rotary tipping frame.
a, is a frame of metal or other material, its upper face is horizontal and on a
level with the rails on which the waggons or tubs run.

page_text: There are four descending brackets a', from the frame a, each having a stud in
it to form the axis on which an anti-friction palley b, can rotate.
These pulleys b, have V shaped edges to correspond to the ✓ groove in the
edges of two end rings d, of the tipping cage, the groove in each ring d, resting
and rotating upon two anti-friction pulleys 6. The edges of the pulleys b, and
grooves in the rings d, may be of any desired form the V form is preferred.
The two end rings d, are connected rigidly together by cross stays or framing d¹,
of any suitable form or shape, and the two rails d', on which the wheels of the
tubs run, rest upon and are secured to the end frames of the rings d.
There are on each side of the tipping cage secured thereto two bars d³, which
are arranged to come just above and clear of the upper sides of the peripheries of
the tub wheels, e, being a tub shown in the cage.
There are also two hook arms or levers d', secured on cross shafts do, having
bearings secured to the rotary tipping cage, and each shaft or axis has a weighted
arm do, to keep each of the hooks d, in about the position in which they are shown
in Fig. 2, where the hook arms are represented in a position in which they have
hooked upon the axles e¹, of the wheels carrying the tub e.
The tub e, is run into the tipping cage from that side of Fig. 2 which is on the
right when facing that figure and the axles e¹, of the tub e, come against the
backside of the hooks d, and pass over them as the weighted arms de, allow them
to give way and bring them back to the position in which they are shown in Fig. 2,
when the tub has passed, the tub being then moved back a little so that the axles e',
of the tub e, come into the hooks d, and are drawn down to bring the tub carrying
wheels firmly against the rails in the rotary cage in which position the axles are
held while the tub e, is being revolved by the tipping cage to empty it of its
load.
Bearings are formed on brackets a², from the stationary framing a, for a
horizontal shaft at both ends of which a V edged pulley f', is secured each
of which comes opposite the V groove in one of the end rings d, of the rotary
cage.
The bearings for the shaft, at both ends are arranged to slide horizontally to
bring the V edged pulley f', in and out of contact with the V grooved rings d.
These sliding bearings are each connected to one end of a short link g', the other
ends of which are jointed one to a short arm and the other to a lever handle
fast on a shaft 92, having its bearings on the brackets a², this shaft having a weighted
arm secured upon it to move the lever handle g, and bring the V edged pulleys f1,
clear of the grooves in the rings d, of the tipping cage when the hand lever
left at liberty.
is
The shaft, is constantly rotated by an endless jointed chain working on a
toothed pulley f2, secured on the shaft, which endless chain is driven by any
suitable motor. Or the shaft, may be geared with the motor by any other
convenient mechanism.
When the tub e, has been run into the tipping cage the hand lever g, is moved
to bring the friction pulleys f', in gear with the end rings d, and this rotates the
cage, the tub e, being emptied at about the time it has been turned upside down.
The handle 9, is released when the revolution has been nearly completed, and the
rotation of the cage is arrested when completed. A brake or brakes are or may be
connected with the lever handle g, (or with arms on the shaft g2) which brakes
will be applied to the V grooves of the end rings d, of the cage when its motion is
to be arrested, by the back movement of the lever handle y, but a little practice
on the part of the operator will enable him to move or allow the handle g, to move
backwards at the right time to leave the cage in the position from which the empty
tube, may be run out of the cage and a full one pushed in to take its place.
When the empty tub has been run out of the cage it is or may be run into an
elevator formed by a lifting cage having a platform with rails for the tub to run
upon, this lifting cage being arranged to ascend suitable vertical guides and the

page_text: lifting cage is or may be lifted and lowered by a chain or rope passing over suitable
pulleys, and actuated by any suitable gearing for actuating the same from the motor
power.
Instead of a vertical lift there may be a short inclined railway, with an endless
jointed chain by preference having projecting arms at intervals. This endless
jointed chain would be constantly working, the tubs in succession would be
pushed on to the lower part of the incline, one of the arms projecting from the
chain would catch upon one axle of the tub and drag it up the incline to the top
and to a point where the tub would descend the forward incline by its own
gravity.
Fig. 3 is a side elevation showing my improved tipping mechanism combined
with screening and discharging mechanism.
A, is a frame work of wood or other suitable material arranged to carry the
required number of screens and shoots and give space below for railway waggons or
other vehicles which are to receive the different sizes of coals.
The screens illustrated are supposed to be arranged to sort into four sizes, but
may be arranged in like manner for sorting more or less sizes. The waggon h,
receives the smallest size of coal and the waggon ', the largest size, and the other
two waggons 2, and 3, the sizes between the smallest and the largest size of coal,
the waggon 2, receiving the next to the largest in h¹.
The tipping cage discharges the coal into the pan shoot k, (which is not a screen)
down which it descends, to the pan or screen 1, then passes along a connecting
pank, (which is not a screen) to the pan or screen 1, and then to a pan shoot k²,
(which is not a screen) to the waggon h¹.
Under the screen 1, there is another screen 1, which discharges into a pan
shoot ³, that empties into the waggon h³.
I prefer to make the sides of the screening pans fixed to the framing A and to
move or shake the screens only, which are frames of bars at the required distance
apart or wire mesh work on frames of suitable construction.
The screens are jointed to the lower ends of vertical rods m, and m², the upper
ends of which are jointed to the framing A.
One set of suspending rods m, are for the screen l', and another set m¹, acts for
the two screens 1, and 1, one under the other the lower ends of these suspending
rods m', being jointed to the upper screen 1, and by short links m², to the
screen 12.
n, is a shaft in suitable bearings, it may be the crank shaft of the motor
engine. Upon this shaft n, an excentric n', is keyed which is connected to one
end of a rod p, the other end of which is jointed to one arm of a two-armed
lever on a shaft or fulcrum p², in suitable bearings upon the framing A to
the arms on this shaft p², one end of two rods p³, and p, are jointed, the other
end of the upper rod på, is jointed to the lower end of one of the suspending
rods m¹, or to some part of the screen frame 1, the other end of the lower rod p³,
is jointed to the shortest suspending link m², connecting the long suspending
rod m', for the screen 1, with that for the screen 12, and the other connecting
rod p, transmits the movement to the rod, connected with the screen 1.
By this means the screens receive the required riddling movement.
7, are hoppers below the screens to conduct the coal passing the screens to the
waggons h, and 2, below.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is.
1. The combination,, construction and arrangement of parts forming the
improved rotary cage mechanism for tipping tubs or waggons of coal substantially
as hereinbefore described and illustrated by the drawings.
2. The use of elevators or steep inclines in combination with rotary tipping

page_text: cages for lifting the empty tubs which have been tipped to a position in which
they may run down an incline by gravity to the point desired substantially as
described.
3. The combination of the improved rotary tipping cage with screening and
loading or discharging arrangements substantially as hereinbefore described and
illustrated by the drawings.
.
4. The arrangements of the screens or screening surfaces separate from the
sides or pans which are stationary and moving the screens or screening surfaces
only to riddle the coal substantially as hereinbefore described.
5. The combination of rotary cage tipping mechanism, with screening mechanism
in which the screens or screening surfaces are separate from the sides of the
pan or screen which are stationary, substantially as hereinbefore described and
illustrated by the drawings.
6. The combination and arrangements of mechanism for transmitting movement
to the screens substantially as hereinbefore described and illustrated by Fig. 3
of the drawings.
PETER J. LIVSEY,
Agent.