IMPROVEMENTS IN MACHINES FOR PULVERIZING MATERIALS, AND APPLIANCES FOR DELIVERING AND SEPARATING THEIR PRODUCTS
Year: 1880

page_text: LETTERS PATENT to Thomas Rowland Jordan, of Adelaide Chambers,
Gracechurch Street, in the City of London, Engineer, for an Invention of
"IMPROVEMENTS IN MACHINES FOR PULVERIZING MATERIALS, AND
APPLIANCES FOR DELIVERING AND SEPARATING THEIR PRODUCTS."
IN
PROVISIONAL SPECIFICATION left by the said Thomas Rowland Jordan at
the Office of the Commissioners of Patents on the 11th November 1880.
THOMAS ROWLAND JORDAN, of Adelaide Chambers, Gracechurch Street, in the
City of London, Engineer. "IMPROVEMENTS IN MACHINES FOR PULVERIZING
MATERIALS, AND IN APPLIANCES FOR DELIVERING AND SEPARATING THEIR
PRODUCTS."
My Invention is designed as an adjunct to the improved pulverizing machines
patented to myself and to Thos. B. Jordan for improvements in apparatus for
crushing or pulverizing minerals or other materials, under date Third December,
1879, and No. 4951, for the better separation and delivery of their products.
Whereas in the afore said Letters Patent an important feature in our Invention
is therein described as consisting of "two cast iron or steel fans or beaters with a
suitable number of arms which revolve nearly in contact with each other, and
with the sides and periphery of a shallow cylindrical crushing chamber in which
they rotate in opposite directions." And further "that the blades or arms of these
fans are so adjusted as to cause their faces to make an angle of about 45° with the
axis of the shaft, the arms on one fan having their faces parallel with those on the
other in the horizontal plane."
I am now careful to form the outside faces of these fans or beaters and the insido
faces and periphery of the crushing chamber so as to ensure an approximately close
fit without actual contact, turning them true if necessary.
Through the outside castings, and as close as possible to the shaft bearings, I
make adjustable apertures through which a forciblo draught of air is induced by
suitable vanes.
These vanes or fans I preferably cast in a recess on the outside of the beater
castings, and the vanes are so arranged as to induce by centrifugal force a blast of

page_text: air through the said apertures into the body of the crushing chamber, whence it is
ejected by the revolving beaters into the delivery pipes.
These delivery pipes, one on each side of the crushing chamber, issue at a point
preferably above the centre of rotation, and are set vertically, or in an oblique
upwards direction, with ends of adjustable height.
The force of blast, which may be regulated at will by the adjustable apertures
or admission and the height of delivery pipe determine the weight or fineness of
the particles that can be ejected by the blast.
Those particles which are too heavy or coarse to be so ejected remain within the
crushing chamber until sufficiently pulverized to be suspended by the induced
current of air, or if any accidentally escape they return by gravitation into the
crushing chamber, and are there again subjected to the percussive action of the
pulverizer until reduced to the required fineness.
The crushed material is thus delivered and separated in the most perfect manner
and to any degree of fineness without the use of sieves.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Rowland Jordan in the Great Seal Patent Office on the
11th May 1881.
THOMAS ROWLAND JORDAN, of Adelaide Chambers, Gracechurch Street, in the
City of London, Engineer. "IMPROVEMENTS IN MACHINES FOR PULVERIZING
MATERIALS, AND IN APPLIANCES FOR DELIVERING AND SEPARATING THEIR
PRODUCTS."
My Invention is designed as an adjunct to the improved pulverizing machines
patented to myself and to Thomas B. Jordan, for improvements in apparatus for
crushing or pulverizing minerals or other materials, under date the Third December,
One thousand eight hundred and seventy nine, and No. 4951, for the better
separation and delivery of their products.
Whereas in the aforesaid Letters Patent an important feature in our Invention
is therein described as consisting of two cast iron or steel fans or beaters with
a suitable number of arms which revolve nearly in contact with each other, and
with the sides and periphery of a shallow cylindrical crushing chamber in which
they rotate in opposite directions. And further that the blades or arms of these
fans are so adjusted as to cause their faces to make an angle of about 45° with the
axis of the shaft, the arms on one fan having their faces parallel with those on
the other in the horizontal plane.
I am now careful to form the outside faces of these fans or beaters and tho
inside faces and periphery of the crushing chamber so as to ensure an approximately
close fit without actual contact, turning them true if necessary.
Through the outside castings, and as close as possible to the shaft bearings, I
make adjustable apertures through which a forcible draught of air is induced by
suitable vanes.
These vanes or fans I preferably cast in a recess on the outside of the beater
castings or on their interior face, and the vanes are so arranged as to induce by
centrifugal force a blast of air through the said apertures into the body of the
crushing chamber, whence it is ejected by the revolving beaters into the delivery
pipes.
These delivery pipes, one on each side of the crushing chamber, issue at a point
preferably above the centre of rotation, and are set vertically or in an oblique and
upwards direction with ends of adjustable height. This may preferably be affected
by a series of apertures in the delivery pipe, either of which at different levels may
be caused to open for the delivery of the crushed material.
The force of blast, which may be regulated at will by the adjustable
apertures or admission and the height of delivery pipe determine the weight
or fineness of the particles that can be ejected by the blast.
Those particles which are too heavy or coarse to be so ejected remain within
the crushing chamber until sufficiently pulverized to be suspended by the induced
current of air, or if any accidentally escape they return by gravitation into the
crushing chamber, and are there again subjected to the percussive action of the
pulverizer until reduced to the required fineness.
The crushed material is thus delivered and separated in the most perfect manner,
and to any degree of fineness without the use of sieves.
And in order that my Invention may be the better understood I now proceed to
describe the Drawings hereunto annexed, reference being had to the letters and
figures marked thereon, that is to say,-
Figure I. is a longitudinal and sectional elevation, and Figure II. is a transverse
sectional clevation of my improved pulverizing machine showing the application
and arrangement of my present improvements.

page_text: A, A, are my improved cast iron or cast steel beaters which are turned so as
to revolve nearly in contact with the interior sides and periphery of the main
casing B, which is also turned inside to render the approximate fit more accurate.
The shoes C, preferably of cast steel, may be made moveable from the arms of
the revolving beaters, and are secured in place by cotters D when in work, or the
ends of the solid casing may bo case hardened or chilled. Through the outsido
castings B are made apertures E (Figure IL) which are rendered adjustable by
the sliding doors F by which the size of the openings may be increased or
diminished.
G, G, are centrifugal vanes cast cither on the back of the revolving beater
castings or on the interior faces as shown. In this latter case apertures H, H, are
made through the beater casting, so as to allow the draught induced by the action
of the centrifugal vanes G, G, to pass through the apertures E, E, and H, H, to the
interior of the crushing chamber.
K, K, are the delivery pipes, one on each side of the crushing chamber, which
issuing from a point preferably above the centro of rotation, lead vertically or
obliquely upwards. Their height is adjustable by means of telescopic joints, or by
means of the interior perforated outlet pipe M (working in an exterior casing P
fitted with shoot O), which is pierced with several apertures N, N, at different
levels and in different angular positions around the said interior pipe. Any
aperture of required height may be put in communication with the delivery
shoot O by rotating the interior pipe M through the requisite angle.
The force of blast which may be regulated by the speed of the revolving
arms A, A, and the adjustable apertures E, E, and the height of the delivery
determine the weight or fineness of the particles that can be ejected by the blast.
And having now fully described and ascertained the nature and object of my
Invention, and the manner in which it is to be performed, be it understood that
what I consider novel and useful and desire to protect by my Letters Patent is,―
1st. The use of apertures for air admission provided with closing doors at or
near the centre of a rotary pulverizing machine for the regulation of the induced
draught of air.
2nd. The combination of curved or angular vanes or fans with the closely fitting
beaters as herein specified, for the forcible induction and expulsion of a draught or
blast of air through the pulverizer.
3rd. In a pulverizing machine, the delivery outlet and shoot adjustable to
variable heights, substantially as herein described.
4th. In a pulverizing machine, the combination of adjustable apertures of air
admission, and the curved induction air vanes or fans and closely fitting beaters,
with vertical or inclined adjustable outlets, obviating the use of sieves, substantially
as described, for the exact regulation of the strength of draught and the continuation
of the percussive action upon the material until reduced to any required degree
of fineness.
In witness whereof, I, the said Thomas Rowland Jordan, have hereunto set
my hand and seal, this Sixth day of May, in the year of our Lord One
thousand eight hundred and eighty-one.
THOS. ROWLAND JORDAN. (L.S.)