Improvements in Disintegrators.
Year: 1894

page_text: Date of Application, 14th Mar., 1894
Complete Specification Left, 12th Dec., 1894-Accepted, 9th Feb., 1895
PROVISIONAL SPECIFICATION.
Improvements in Disintegrators.
I FREDERICK DRESSER of Edmund Street, Liverpool in the County of
Lancaster Civil Engineer, do hereby declare the nature of this invention to be as
follows:-
.
The invention relates to disintegrators in which so called steel spiders or rapidly
rotating arms impel the material to be disintegrated against a suitable face.
Hitherto it has commonly been the practice to use as the disintegrating face cast
steel teeth or ratchets, with the disadvantage that the edges of the said teeth soon
wear and become rounded in use and the apparatus loses its efficiency.
.
Now the object of my invention is to so construct the disintegrating surfaces
that the efficiency of the apparatus is practically constant.
My invention consists essentially in lining the insides of the disintegrators with
consolidated emery blocks or with blocks of emery combined with steel plates.
When consolidated emery alone is used, I prefer to use very coarse emery, the
harder the material to be disintegrated the coarser being the emery. The emery
is mixed with magnesian cement and filled into cast iron segments which form the
body of the disintegrator. When steel plates are used in combination the said
plates are placed in the segments and the emery and cement filled in between so as
to bind the whole together.
Dated the 13th day of March 1894.
J. JOHNSON,
Agent.
Improvements in Disintegrators.
I FREDERICK DRESSER of Edmund Street Liverpool in the County of
Lancaster, Civil 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 :-
66
.
My invention relates to certain improvements in machines technically known as
disintegrators" in which friable and other materials are disintegrated, pulverized
or ground by impact or attrition or both and my said invention is equally
applicable to the class known as the " disc" type as well as to the beater form of
machine.
In one form of the disc class two opposing discs having teeth, grooves or
irregularly formed roughened faces usually of chilled iron or steel are caused to
rotate in different directions in close proximity to one another and the material
admitted between them is ground or pulverized partly by impact and partly by
attrition.
In another form of this class of machine one disc only is caused to revolve
the other remaining stationary.
In the "beater" class, a number of steel or iron arms attached radially to a
Price 821

page_text: shaft are caused to revolve at a high velocity inside a casing lined with corrugated
or serrated chilled iron or steel plates, and the disintegration of bodies or
substances admitted thereto is accomplished by impact only.
My said invention relates to the construction of the faces and internal peripheries
of machines of the foregoing classes & consists in the employment and combination
of two distinctive materials which wear away at unequal rates, the one hard and
homogeneous and the other granular, such as chilled iron or steel and a compound
consisting of emery, corundum or iron-sand and cement or other suitable matrix or
binding material, which I dispose upon the faces of the said discs and around th
inner periphery of the casings in alternate strips and segments or sections arrange
either radially or obliquely and the object of this combination and arrangement is
to obviate the necessity for the continual renewal of working parts as is at present
the case, while at the same time rendering the efficiency of the machine practically
constant. The reason for this combination being that owing to the more friable
nature of the said emery or other compound it wears away more rapidly than the
said strips of steel, iron or other hard metal and consequently the latter project at
all times above the face of the said compound, and by the action of the machine,
as one edge of the said strips of metal become bevelled off by wear the other edges
are at the same time being automatically sharpened so that by reversing the
direction of motion from time to time alternate edges of the said strips of metal
are brought into use and thus the efficiency of the machine remains constant so
long as sufficient substance of the metal strips and compound remain to withstand
the strain of work.
One form and method of carrying my said invention into effect is shewn by
Figs. 1 and 2 upon the sheet of drawings appended hereunto in which a number of
radial metal strips A. cast in segments are attached to a disc and the intervening
spaces B are filled with the emery or other compound.
Fig. 3 represents my said invention as applied to the inner periphery of the casing
of a machine of the beater class.
Fig. 4 represents another method of applying my said invention to the faces of
discs in which strips of steel A of tapering or flat section are fitted into notches
formed in an annular recess in the face of such disc and the spaces B are filled
with the emery or other compound as in Figs. 1 & 2.
Fig. 5 represents a full sized section of a disc face partly worn, the metal strips A
being rounded on one edge while being sharp on the other.
1 do not confine myself precisely to the foregoing methods of construction as the
said materials may be disposed and combined in a great variety of ways but I have
found the methods represented suitable for almost all classes of material.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
and
ΟΙ
In machines for disintegrating pulverizing and grinding various materials and
substances, consisting of one or more discs or grinding faces, combined with, or
without rotating beaters or arms, the formation of the working surfaces of the
stationary revolving parts of strips of steel, chilled iron or other hard metal
arranged either radially or obliquely at suitable distances apart and having the
intervening spaces filled with a compound of a granular character consisting of
emery, corundum, iron-sand or other equivalent hard material and cement or other
suitable matrix substantially as herein described and illustrated and for the
stated.
Dated this 10th day of December 1894.
purpose