Improvements in Apparatus for Crushing or Pulverizing Ores and other Substances.
Year: 1889

page_text: Date of Application, 10th Aug., 1889
Complete Specification Left, 29th Apr., 1890-Accepted, 31st May, 1890
[Communicated from abroad by the Honourable ERASTUS WIMAN, of New York,
United States of America.]
Improvements in Apparatus for Crushing or Pulverizing Ores and
other Substances.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings in the County of Middlesex, do hereby declare the nature of
this invention to be as follows:-
This invention relates to apparatus for crushing or pulverizing ores and other
substances and is designed to improve the construction of the same.
The said invention relates more especially to apparatus of that kind or class
described in the Specifications of former Letters Patent viz. :-No. 4290 dated
20th March 1888 granted to me and No. 1270 dated 26 January 1887 also granted
to mo.
The said invention comprises various improvements hereinafter set forth.
In carrying my said invention into practice I form the separating chamber equal in
width to the longest diameter of the pulverizing chamber. The said separating
chamber is constructed with vertical walls and has a tapering top with a flange or
collar to which a suitable discharge pipe may be connected.
This separating chamber is moreover preferably provided with sectional lining
plates which may be corrugated or roughened and are secured upon the interior walls
of the said separating chamber by means of bolts passed through suitable bolt holes.
In addition to or in place of the usual blades or beaters the heads are provided
with pins or spikes, which are particularly advantageous for the reduction of coarso
materials, such as bones, bark and the like. The blades or beaters are adapted to
operate close to the wall of the disintegrating chamber whilst the pins or spikes by
reason of their length intersect each other's paths during their revolution. When the
said pins or spikes are adapted to heads secured upon oppositely rotating shafts or
arbors such as those described in the Specification of the former Letters Patent
No. 4290 of 18SS hereinbefore referred to, the said pins or spikes will intersect each
other's paths at the lower part of their circuit, while at the upper part of the said
circuit will be left an open throat or space into which the material to be operated
upon is caused to drop. These pins or spikes are so arranged that they may be
readily inserted into, or removed from, the said heads at pleasure and when they
are removed, the machine will operate in the ordinary manner. The pulverizing
chamber is in some instances provided with an annular extension or chamber some-
what similar to that described in the Specification of the hereinbefore mentioned
Letters Patent No. 1270 of 1887. This annular extension or chamber is preferably
formed of a width nearly equal to the clear space provided between the faces of the
heads where they approach nearest to each other, and is adapted to be put in
communication with the pulverizing chamber by means of grate bars, the size of
whose perforations determine the degree of fineness of the material which may pass
into said annular extension or chamber.
When it is desired to reduce the material being operated upon to only a moderate
degree of fineness, the air current may be omitted and the ground product will drop
down by gravity and pass through the perforations of the grate bars and out through
a suitable opening provided below the said annular extension or chamber. The
complete air circuit as described in the Specification of the said former Letters
Patent No. 1270 of 1887 is however preferably employed as the air pressure assists in
holding the material undergoing operation up from the bottom of the pulverizing or
disintegrating chamber between the beaters and the pins or spikes. The said air

page_text: blast or current is moreover advantageous in coarse grinding, in that the said blast
or current draws off the fine dust into the settling drums, while the coarser product
drops down through the grate bars, thus separating the coarse and fine material.
The machine may be adapted to fine grinding by simply blocking up the above
mentioned discharge opening and allowing the material to accumulate until it fills the
annular extension or chamber beneath the said grate bars as described in the said
former specification above referred to.
of a hub or
I provide moreover an improved beater for pulverizing consisting
_central boss with two or more radial arms projecting from same, on which are bolted
renewable faces formed of hardened cast steel or other suitable métal.
Although I have hereinbefore described a convenient and advantageous method of
carrying my said invention into practice it is obvious that I can somewhat modify
my said apparatus without however departing in anyway from the nature of my
invention.
Dated this 10th day of August 1889
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Crushing or Pulverizing Ores and
other Substances.
I HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co. Patent Agents,
Southampton Buildings in the County of Middlesex 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 apparatus for crushing or pulverizing ores and other
substances.
The said invention rélates more especially to apparatus of the kind or class
described in the Specifications of the following former Letters Patent granted to mo
viz. No. 1270 dated 26th January A.D. 1887 and No. 4290 dated 20th March
A.D. 1888, and comprises various improvements hereinafter set forth.
In the accompanying drawings
Figure 1 is a side elevation of my improved apparatus, partly in vertical central
section, some of the parts being removed.
Figure 2 is a plan, partly in horizontal section, showing a portion of the said
apparatus.
Figure 3 is a side elevation and,
Figure 4 a plan showing a detail of construction.
Like letters indicate corresponding parts throughout the drawing.
A is the bed or base plate, B is the pulverizing chamber, C is the separating
chamber, Cis the hopper for containing the material to be fed into the machine.
DD are the rotating heads. D1 D' are the blades or beaters.
.
The separating chamber C, in my improved apparatus, is so formed ibat the
width thereof is equal or approximately equal to the diameter of the pulverizing
chamber B at the largest part thereof. The said chamber C may be of octagonal
or other suitable shape in horizontal section. The walls of the said chamber are
vertical and the said chamber is tapered at its upper end and is provided with a
flange to which a suitable discharge-pipe E is connected. The said separating
chamber is moreover, provided with sectional lining plates F (Figures 3 and 4)
which may be corrugated or roughened as shown so as to assist in the attrition or
pulverization of the particles of material that are carried or drawn up into the said
chamber. The plates F are secured upon the interior walls of the separating
chamber C by means of bolts passed through suitable bolt-holes F provided in the
said plates.
The blades or beaters D₁ are formed on or firmly secured to the heads D and the

page_text: latter are supported upon shafts D2 in a manner substantially similar to that described
in the said former specification No. 4290, that is to say:-The said shafts are
arranged so that their axes are at an inclination to the horizon, the said inclination
Moreover in addition to tho
being downwardly and outwardly from the heads D.
said blades or beaters D¹, the heads D are provided with pins or spikes G, which
are particularly advantageous for the reduction of coarse materials such as bones,
bark and the like. The blades or beaters D¹ operate in proximity to the walls of the
disintegrating chamber B. The pins or spikes G by reason of their greater length
intersect each other's paths during their revolution. When the heads D to which
the said pins or spikes are secured are arranged upon oppositely rotating shafts such
as those described in the said former specification No. 4290 the said pins or spikes G
will intersect each other's paths at the lower part of their circuit while at the
upper part of the said circuit, there will be left an open throat or clear space into
which the material to be operated upon will fall. The pins or spikes G are pre-
ferably so arranged that they may be readily inserted into or removed from the said
heads, and, when the said pins or spikes are removed, the machine will operate in
the ordinary manner.
The pulverizing chamber B is provided with an annular extension or chamber B¹
having a delivery aperture B2 of somewhat similar construction to that described in
the said former specification No. 1270. The said annular extension or chamber B¹
is, however, made considerably wider than heretofore. In the apparatus shown in
the drawing, its width is nearly equal to the clear space between the faces of the
rotating beads D where they approach nearest to each other. This increased width
has been found to very considerably increase the efficiency of the said chamber. The
said annular extension is separated from the pulverizing chamber B by means of
grate-bars H in a manner substantially similar to that described in the said former
specification No. 1270.
When it is desired to reduce the material being operated upon to only a moderate
degree of fineness, the air current may be omitted and the ground product will drop
down by gravity and pass through the perforations of the grate-bars H and out
through the delivery aperture B².
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed as communicated to me
by my foreign correspondent I wish it understood that I claim :—
First. The employment, in a machine or apparatus for pulverizing or disintegrating
ores or other substances, of rotating heads having blades or beaters and provided
with pins or spikes, substantially as, and for the purposes, set forth.
Second. The improved separating chamber provided with the sectional lining
plates, substantially as described.
Third. The improved apparatus constructed substantially as described with reference
to the accompanying drawing for pulverizing or disintegrating ores
substances.
or other
1
ן.
0011
A 1800
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.