BREAKING COAL, STONE, ORES, SLAG AND SUCH LIKE SUBSTANCES
Year: 1887

page_text: Date of Application, 17th Nov., 1887
Complete Specification Left, 17th Aug., 1888
Complete Specification Accepted, 2nd Nov., 1888
I GEORGE LOWRY, Engineer, of Barnsley in the County of Yorkshire, England,
do hereby declare the nature of this my invention for BREAKING COAL, STONE,
ORES, SLAG AND SUCH LIKE SUBSTANCES to be as follows:-
In the machines with gyratory shafts I make the crusher head open or hollow inside
for the broken material to pass out freely through the grid bars.
The ordinary jaw or other crushers I make with one or both jaws in grid form with
a changeable mesh to give any required size and allow the broken material to pass
freely out behind or down the centre, For breaking very hard material I cast the
crusher head on a taper chill pin & line it with a metal bush bored to fit the shaft.
The flat screen I make in two or more parts set one above the other at an angle so
that the broken material will glide down through the barriers allowing the finer
portion to drop through as required. For convenience in changing the mesh plates in
circular screens, I use three V shaped longitudinal bars to retain the mesh plates in
working position, one of these bars I make easily removable so that one or more plates
can be readily changed.
I mount the elevator buckets on two endless bands & bolt them thereon near the
front edge so that they will strike out on passing over the top roller and throw the
material well forward. To the main bucket I pivot a shell bucket with an open grid
bottom to allow the dirt, dust and small particles to pass through into the main
bucket.
In the machines, for breaking coal and other soft materials, that have the gyratory
shaft, I dispense with the chilled liners for the concave hopper (which I use for
breaking hard substances) and I cast the hopper of proper form with the centre portion
of the main frame.
The grid or mesh plates I make of cast steel with the bars well bevelled off towards
the back to pass the sized material readily through.
Dated this Sixteenth day of November eighteen hundred and eighty seven.

page_text: COMPLETE SPECIFICATION.
Improvements in Machines for Breaking Coal, Stone, Ores, Slag, and
such like Substances.
1 GEORGE LOWRY, Engineer, of Barnsley in the County of Yorkshire, England,
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:
This Invention relates to machines for breaking or crushing coal, stone, ores, slag
and such like substances, by the well known gyratory crushing head-for improve-
ments in which a patent was granted to me on the twenty ninth of December eighteen
hundred and eighty five, No. 15,954,-and the ordinary crushing jaws. My invention
comprises certain combinations of parts whereby the machines are rendered more
efficient and more convenient for working.
In the accompanying drawings Fig. 1 is a vertical section of my improved crusher
head, figs. 2, 3, & 4, are sectional views of the liner; fig. 5, is a plan of the ribbed
liner.
Figs. 6 & 7, are vertical sections of the crusher jaws and screen.
Figs. 8, 9 & 10, are longitudinal view & section of my improved circular screen.
Figs. 11, 12, & 13, are views of my improved elevator with double buckets. Fig. 1,
A. is the chilled crusher head made in two parts, the top part is cast on a taper chill
and fits onto the taper liner B, which is made of stiff cast iron and bored to fit the
shaft. This liner is interchangeable and will out-last several heads. G is the bottom
or open head which takes under the liner D, this liner has two circular chilled ribs
round the bottom, the ribs on the head cross these at about right angles and cube the
material much better and the head is much more easily adjusted to produce the required
size, by raising or lowering the shaft. B' fig. 2, is a vertical section of the taper liner;
E fig. 3, is plan of the underside, F fig. 4, is plan of top, G fig. 5, is bottom plan of
liner D. Fig. 6, is a vertical section of crusher jaws open, with double screen H,
about level to receive the broken coal or other soft material. Fig. 7 is a vertical
section of the jaws closed, with the double screen H at an angle to discharge
the coal.
The mesh is made coarser in the top screen and finer in the lower one, so that the
large or house coal passes over the upper screen and the nuts over the lower, while
the smudge and dust drop through the latter. Fig. 8, is longitudinal view of improved
circular screen made with three gradations, the first is made with fine mesh in the
usual way, the second is coarser and the third coarser still. I. I. I. fig. 9. is_cross
section of longitudinal bars two of which are riveted to the plain rings J. J. J. J. and
hold them securely in place, the third is made in three lengths secured by bolts and
easily removeable for the purpose of changing the mesh screen when required.
Fig. 10, is front view of one length of changeable mesh ring.
Fig. 11, is vertical section of endless band elevator with 4 buckets shewn fixed on
the endless bands in the usual way by bolts & plates.

page_text: Fig. 12, is plan of double shell bucket drawn to a larger scale.
Fig. 13, is cross section of double shell bucket with perforated bottom extended
outwards in the position as it passes over the top roller K where it discharges the
coarsest of the material which rests on the top, the dust & finer particles which have
passed through the perforated plate or sieve are discharged as the buckets pass round
the bottom roller L. M is the pivot on which the perforated shell bucket moves.
N is a radial slot and O. O. is a fixed pin in each side of the main bucket, which
allows the inner or shell bucket to move outwards the length of the slot and recede
back to the main bucket after passing the bottom roller.
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 1
claim is.
First. In a machine for breaking coal, stone, ores, slag and such like materials,
making the crusher head with a chilled taper hole. Substantially as above set forth
and for the purpose specified.
Second. The combination of the chilled head & the taper bush. Substantially as
above set forth & for the purpose specified.
Third. The combination of the gyratory shaft, the crusher head & the circular
ribbed liner. Substantially as above set forth & for the purpose specified.
Fourth. The open head for the broken material to pass through. Substantially as
above set forth & for the purpose specified.
Fifth. The combination of the crusher jaws & the vibrating double screen. Substan-
tially as above set forth & for the purpose specified.
Sixth. The circular revolving screen. Substantially as above set forth & for the
purpose specified.
Seventh. The combination in the machine for breaking coal & like substances of the
elevator & the inner or double buckets with perforated bottom. Substantially as above
set forth & for the purpose specified.
Dated this Sixteenth day of August eighteen hundred and eighty eight.