IMPROVEMENTS. IN MACHINERY FOR CRUSHING COAL SLACK AND OTHER SUBSTANCES
Year: 1878

page_text: LETTERS PATENT to Alfred Hewlett, of the Grange Coppul, in the County of
Lancaster, Mining Engineer, and James Shearer, of Willow Cottage, Whelley,
in the Borough of Wigan, in the said County of Lancaster, Manager of Coke
Works, for the Invention of "IMPROVEMENTS. IN MACHINERY FOR CRUSHING
COAL SLACK AND OTHER SUBSTANCES."
Sealed the 8th November 1878, and dated the 9th July 1878.
.PROVISIONAL SPECIFICATION left by the said Alfred Hewlett and James
Shearer at the Office of the Commissioners of Patents on the 9th July 1878.
ALFRED HEWLETT, of the Grange Coppul, in the County of Lancaster, Mining
Engineer, and JAMES SHEARER, of Willow Cottage, Whelley, in the Borough of
"IMPROVEMENTS
Wigan, in the said County of Lancaster, Manager of Coke Works.
"
IN MACHINERY FOR CRUSHING COAL SLACK AND OTHER SUBSTANCES."
For this purpose a horizontal circular table is made to revolve under edged
crushing rollers. The coal slack or other mineral substance to be crushed is fed on
to the table from a hopper or otherwise in front of a scraper, and is by guide plates
brought on to that part of the table which will pass under the crushing rollers.
The material, after it has been carried below each of the crushing rollers, is removed
from the table by the scraper which is in rear of the feeding hopper. This scraper
is so formed as to sweep the crushed material gradually towards and off the edge of
the table. Thus the crushing operation is completed at one revolution of the table,
and the material to be crushed is continuously fed on to the table and continuously
removed from it.
The crushed material as it is swept from the table may fall into a hopper, from
which it can be elevated to any height required.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Alfred Hewlett and James Shearer in the Great Seal Patent Office on
the 9th January 1879.
ALFRED HEWLETT, of the Grange Coppul, in the County of Lancaster, Mining
Engineer, and JAMES SHEARER, of Willow Cottage, Whelley, in the Borough of
Wigan, in the said County of Lancaster, Manager of Coke Works. "IMPROVEMENTS
IN MACHINERY FOR CRUSHING COAL SLACK AND OTHER SUBSTANCES."
This Invention has for its object improvements in machinery for crushing coal
slack and other substances.
For this purpose a horizontal circular table is made to revolve under edged
crushing rollers. The coal slack or other mineral substance to be crushed is fed on
to the table from a hopper or otherwise in front of a scraper, and is. by guide plates
brought on to that part of the table which will pass under the crushing rollers.
The material, after it has been carried below each of the crushing rollers, is removed
from the table by the scraper which is in rear of the feeding hopper. This scraper
is so formed as to sweep the crushed material gradually towards and off the edge of
the table. Thus the crushing operation is completed at one revolution of the table,
and the material to be crushed is continuously fed on to the table and continuously
removed from it.
The crushed material as it is swept from the table may fall into a hopper, from
which it can be elevated to any height required.
The Drawing hereunto annexed shows machinery arranged according to our
Invention.
Figure 1 is a side elevation; Figure 2, a plan; and Figure 3, an end elevation of
the machinery.
Figure 4 is a plan view on a larger scale showing the revolving table, crushing
rollers, and scrapers, and guide plates; Figures 5 and 6 are elevations of the same.
A is a horizontal circular table carried by an axis B; C, D, are crushing rollers
resting on the table; E is a hopper through which the material to be crushed is fed
on to the table.
The slack falls through the aperture E¹, see Figure 4, in the bottom of the hopper
on to the revolving table A, and is carried round in the direction of the arrows.
By means of the scrapers F, G, and H, the slack is guided under the roller C, the
thickness of the layer of slack being regulated by the plate I. After leaving the
first roller the slack is directed by the scrapers J and K under the second roller D.
In passing from one roller to the other the crushed layer is scraped up from the
table by the knife L, by which means the slack is presented to the second roller to
be crushed in a different direction. After leaving the knife the thickness of the
layer passing under the second roller is regulated by the plate M. The scraper N
cleans the last roller; and finally, the slack is discharged from the table by means
of the scraper. O.
P and Q are wrought-iron bars supported by brackets (R, R, in the elevation);
to these bars the scrapers H, K, and O, are bolted. The scrapers F and J are bolted
to each other, as shown. The method of staying the scrapers by means of the
knife Land the bars S, S, is evident from the Drawing.
In addition to or in substitution for the plates I and M small rollers may be used
to prepare the slack for the large crushing rollers C and D.
On the axis B of the horizontal table A is a toothed wheel T. Below the first
crushing roller a toothed pinion U gears with and drives this toothed wheel. The
toothed pinion is on a shaft V driven by a steam engine, the bed of which is shown
at W, and the table is thus caused to revolve continuously. Below the second
crushing roller another toothed pinion gears with the wheel T, and from the axis of
this pinion motion is transmitted to an endless elevating ladder X, as shown at
Figure 1.

page_text: As. the table revolves the material to be crushed descends on to it from the
hopper E, as before explained, and after being crushed by both rollers C and D the
crushed material is brought against the scraper O, and is by it swept from off the
table, and then as the table moves on it receives from the hopper a new supply of
material to be crushed; and so the operation is carried on continuously.
The crushed material as it is discharged forms a pile at the foot of the elevating
ladder X, and is by it lifted and discharged into a hopper Y which conducts it into
a wagon Z to be conveyed away.
Having thus described the nature of our Invention, and the manner of performing
the same, we would have it understood that we do not confine ourselves to the
precise details of the construction of the machinery shown by the Drawings, but
we claim,-
First. The combination of machinery for crushing coal slack and other substances,
substantially as herein-before described.
Second. The combination of feeding hopper, revolving table, crushing rollers, and
scrapers, arranged to act substantially in the manner herein-before described, so
that the crushing operation is completed at one revolution of the table and is
carried on continuously.
In witness whereof, I, the said James Shearer, have hereunto set my hand
and seal, this Seventh day of January, in the year of our Lord One
thousand eight hundred and seventy-nine.
JAMES SHEARER. (L.B.)