An Improved Grinding and Triturating Machine.
Year: 1886

page_text: An Improved Grinding and Triturating Machine.
I GEORGE FREDERICK REDFERN of the General Patent Office, No. 4, South Street,
Finsbury, in the county of Middlesex Patent Agent do hereby declare the nature of
this invention to be as follows:-
---
This invention relates to an improved construction of grinding and triturating
machine applicable for use in all manufactures in which grinding, triturating, or
mixing operations are carried on such as in the manufacture of oil tan grinding, soap
manufacture and the like, and also suitable for use as a substitute for the stones at
present employed in paper mills and other works for grinding straw-stuff, colors,
dough for bread and similar substances.
The improved machine is constructed of two cylinders or rollers formed with iron
cores cast upon wrought iron shafts and with helical grooves in which are fixed cast
steel blades the thickness of which varies according to the kind of work which is to be
performed by the machine. The said blades are of three kinds.
The first kind serve to receive the materials which are to be ground or triturated in
the machine and consists of six blades placed at equal distances apart over the outer
surface of the rollers and along their whole length.
The second kind of blades which serve to cut or tear the materials, commence at
about one third of the length from one end of the rollers and extend to the other end
of the same.
The third kind or finishing blades commence at two thirds of the length from one
end of the rollers and extend to the opposite end the number of blades being double
those of the second kind and arranged parallel therewith. The third series of blades
corresponds to a part of the box or case of the machine also serving to finish the
material and having for object to prevent the escape from the machine of any portion
of the material under treatment which has not been thoroughly ground or triturated.
017

page_text: It will be obvious that the two cylinders or rollers engaging with each other will
present a large triturating or grinding surface the rollers of the machine moving at a
speed of about three hundred revolutions per minute.
One of the rollers is driven by a motor by means of a pulley or gearing giving the
necessary speed thereto and capable of being thrown in or out of gear by means of
suitable disengaging mechanism actuated by hand.
It will also be obvious that the second roller engaging with the first will have a
rotary motion communicated thereto in a similar manner to ordinary gearing.
These rollers are enclosed in the said box or case which is of cast iron and formed
in two parts provided with hinges at one side and a bolting or closing device at the
other side whereby the box or case can be opened and the inside of the machine be
inspected in a few seconds without having to remove any of the parts of the machine
except unscrewing the thumb screws or bolts securing the top or cover.
The inside of the box or case is provided with projecting steel blades fitted and
secured therein by means of countersunk screws, so as to enable them to be removed
when required. These blades are fixed in such a manner as to form from the inlet
opening to the finishing part of the machine a screw of constant pitch having for
object to assist in conveying the materials under treatment towards the outlet, while
they are being ground and triturated by reason of the friction of the rollers; a
sharpened steel blade is arranged below the rollers at or near their point of intersection.
The said inlet opening is formed in the top or cover of the case or box above the
receiving portion of the rollers. This opening serves for feeding the machine which
feeding is effected by means of an endless chain or metallic web to which a rotary
motion is imparted by the machine
It will be understood that the substances conveyed by these means reach the hopper
and are thrown therein, the hopper being supplied with water by a cock allowing such
supply to be regulated according to the use for which the machine is intended.
At the other end of the said machine is situated the outlet opening formed of an iron
pipe cast with the end part of the machine. This opening allows of the discharge
being regulated by means of a small slide or door enabling the said outlet to be opened
or closed when required.
Amongst the advantages to be derived from the use of this machine may be
mentioned the following:
A very small amount of motive power is required in order to perform a large
amount of work; economy in working as the machine can be operated by one
attendant only, considerable reduction in the space required for the machine as it can
be constructed of very small dimensions and prevention of the accidents which so often
occur in grinding machines as heretofore constructed.

page_text: COMPLETE SPECIFICATION
An Improved Grinding and Triturating Machine.
I, GEORGE FREDERICK REDFERN, of the General Patent Office, No. 4, South
Street, Finsbury, in the County of Middlesex, Patent Agent, do hereby declare the
nature of this invention (a communication from abroad by Maxime Hubert Simonet,
of Quintin, Cotes du Nord, in the republic of France) 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 an improved construction of grinding and triturating
machine applicable for use in all manufactures in which grinding, triturating, or
mixing operations are carried on such as in the manufacture of oil, tan grinding, soap.
manufacture, and the like, and also suitable for use as a substitute for the stones
at present employed in paper mills and other works for grinding straw-stuff, colors
and similar substances.
In order to enable the invention to be fully understood I will describe the same by
reference to the accompanying drawing in which figure 1 represents a longitudinal
sectional elevation and figure 2 a cross section (with the rollers removed) of a:
grinding and triturating machine constructed according to this invention. Similar
letters in both the figures represent similar parts.
The improved machine is constructed of two cylinders or rollers formed with iron
cores cast upon wrought iron shafts and with helical grooves in which are fixed cast
steel blades the thickness of which varies according to the kind of work which is to be
performed by the machine. The said blades are of three kinds.
The first kind serve to receive the materials which are to be ground or triturated in
the machine and consists of six blades placed at equal distances apart over the outer
surface of the rollers commencing at a, as shewn in figure 1 and extending along
their whole length to the point marked b.
The second kind of blades which serve to cut or tear the materials, commence
at about one third of the length from one end of the rollers as indicated at c, and
extend to b, at the other end of the same.
The third kind or finishing blades commence at two thirds of the length from one
end of the rollers as indicated at d, and extend to b, at the opposite end, the number of
blades being double those of the second kind and arranged parallel therewith as
clearly shewn in figure 1. The third series of blades corresponds to a part of the box
or case of the machine also serving to finish the material and having for object to
prevent the escape from the machine of any portion of the material under treatinent
which has not been thoroughly ground or triturated.
One of the rollers is driven by a motor by means of a pulley or gearing giving the
necessary speed thereto and capable of being thrown in or out of gear as required.
It will also be obvious that the second roller engaging with the first will have a
rotary motion communicated thereto in a similar manner to ordinary gearing.

page_text: These rollers are enclosed in the said box or case which is of cast iron and formed
in two parts provided with a bolting or closing device whereby the box or case can
be opened and the inside of the machine be inspected in a few seconds.
The inside of the box or case is provided with adjustable shells ff, having
projecting steel blades as shown in the drawing. These blades are fixed in such a
imanner as to form from the inlet opening to the finishing part of the machine a screw
of constant pitch having for object to assist in conveying the materials under treatment
towards the outlet, while they are being ground and triturated by reason of the friction
of the rollors.
The said inlet opening serves for feeding the machine.
At the other end of the said machine is situated the outlet e, (figure 1) formed of an
iron pipe.
9,9. represent the screws for adjusting the shells f,f; h, h, are the nuts for fixing
the said shells.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed I declare that what I claim is :-
1. In a grinding and triturating machine the combination of two cylinders provided
with helical grooves substantially as and for the purpose herein before described and
illustrated in the accompanying drawings.
2. In a grinding and triturating machine the combination with the herein described
helical grooves of steel blades substantially as and for the purpose herein before
described and illustrated in the accompanying drawings.
3. In a grinding and triturating machine the use of blades arranged and operating
substantially in the manner and for the purposes herein before described and illustrated
in the accompanying drawings.
4. In a grinding and triturating machine the combination with a series of steel
blades fixed to cylinders of adjustable shells having projecting steel blades and placed
in the interior of the box or case of the machine substantially as hereinbefore
described and represented in the accompanying drawings.
5. The improved grinding and triturating machine hereinbefore described and
represented in the accompanying drawings.