Improvements in Roller Crushing Mills.
Year: 1897

page_text: Date of Application, 19th Jan., 1897
Complete Specification Left, 19th Oct., 1897-Accepted, 8th Jan., 1898
PROVISIONAL SPECIFICATION.
Improvements in Roller Crushing Mills.
We, JOHN FREDERICK WEBB, of 83 Bridge Road, Battersea, in the County of Surrey,
Engineer, JOSEPH EDWARD LILLEY, of The Chestnuts, Wealdstone, in the County of
Middlesex, Gentleman, and JOHN CHAPMAN of 81 Saint Mary's Road, Ealing, in the
County of Middlesex Gentleman, do hereby declare the nature of this invention
to be as follows:-
Our invention relates to roller crushing mills and has for its object the construction
and arrangement of such a machine, whereby material can be feed in and passed
through a series of crushing operations, whereby the material is gradually broken
down, so that when it finally issues from the machine, it shall be of the proper
degree of fineness.
To carry our invention into effect, we arrange in suitable housings or frames a
series of rollers which may have either a smooth or grooved periphery, and are made
of different sizes and lengths, according to the size of the machine.
These rollers are superposed with their axes parallel upon one another, and are
held in the centre line of the machine, by suitable bearings adapted to slide in the
housings or frames. Inclined screens are provided, at the front and the back of the
rollers, so as to feed the material, which is fed into and travels down the screens
into the space between the adjacent crushing rollers, each screen is fitted with a box
or floor, upon which the material that can pass the screen, falls; a funnel delivery
orifice is arranged at the lower end of the screen into which the fine material falls.
The screens are agitated, by any suitable mechanism in order to maintain the feed
of the material down their inclined surfaces into the space between the rollers.
We may apply spring or other elastic pressure to the bearings of the rollers,
in order to tend to force their peripheries into contact with one another. This
pressure may be applied either direct, or through a leverage. If desirable the screen
plates may be adapted to readily be inverted on their support, in order that they
may be self-cleaning by the material which passes over them.
We arrange the upper and the lower rollers to be driven by pulleys or other
suitable means, for transmitting motion, and if desirable the upper rollers may be
made to travel faster than the lower ones.
The intermediate rollers are driven by frictional contact with the upper and lower
ones.
The material travels downward from screen to screen in a zig zag path, passing
between a pair of rollers in each alternation of direction of travel: for example with
four rollers, the material passes between them three times.
Dated this 19th day of January 1897.
FELL & JAMES,
1 Queen Victoria Street, London, E.C., Agents for the Applicants.

page_text: We, JOHN FREDERICK WEBB, of 83, Bridge Road, Battersea, in the County of Surrey,
Engineer, JOSEPH EDWARD LILLEY, of the Chestnuts, Wealdstone, in the County of
Middlesex, Gentleman, and JOHN CHAPMAN, of 81 Saint Mary's Road, Ealing, in the
County of Middlesex, Gentleman, 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 roller crushing mills and has for its object the construction
and arrangement of such a machine, whereby material can be fed into and passed
through a series of crushing operations, so that the material is gradually broken down
and when finally issuing from the machine it is of the proper degree of fineness.
In order that the invention may be the better understood we will now proceed to
describe the same in relation to the accompanying drawing hereunto annexed,
reference being had to the letters and figures marked thereon. Like letters refer to
like parts in the various figures.
Figure 1 is a side elevation of our mill.
Figure 2 is an end elevation of the same.
To carry our invention into effect we arrange in suitable housings or frames A
a series of rollers B which may have either a smooth or a grooved periphery.
These rollers B are superposed with their axes parallel upon one another and are
held in the vertical centre of the machine, by suitable bearings C adapted to slide in
the housings or frames A.
We apply spring or other elastic pressure to the bearings C of the rollers B in
order to tend to force their peripheries into contact with one another. This pressure
may be applied either direct or through a leverage. In the mill illustrated it is
applied by a lever D restrained by a bolt d at one end and resting on a pressing
piece E which is placed upon the uppermost bearing C. The other end of the
lever D is loaded by a spring F compressed by a hand nut G upon a bolt or
spindle H.
A hopper I is situated on the upper part of the machine, from which material is
fed on to the first of a series of inclined screens J which are placed alternately at the
front and back of the rollers, so as to feed the material from screen to screen through
the adjacent crushing rollers B.
Each screen J is fitted with a box or floor K upon which the material that can
pass through the screen falls; a funnel delivery device L being arranged at the
lower end of each screen J to lead down the material to the travelling band or
conveyor M, for transmission to any convenient place, as such material having
passed through one of the screens is sufficiently small, and does not require any
further treatment by crushing by the rolls B, thus saving unnecessary work being
put upon it by useless crushing.
The screens J are agitated by any suitable mechanism, in order to maintain the
feed of the material down their inclined surfaces into the space between the
rollers B or into the hopper L. This agitation may be simply effected by
eccentrics N carried by the shafts O, operated by band driving gear P, driven by the
pulley Q situated on the axle of the lowest roller B.
We arrange every other roller B with means for being driven, the intermediate
rollers being driven by frictional contact with the driven rollers. A convenient form
of driving is by means of large pulleys R adapted to be driven by straps or
belts.
It will thus be seen that the coarse material travels down from screen to screen in
a zigzag path, passing between a pair of rollers in each alternation of direction of

page_text: travel, for example, with the four rollers, as shown in the drawing, the material
passes between them three times, while the material when fine enough passes
through one or other screen and is delivered in a finished condition on to the
conveyor.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1st. In a roller crushing mill, three or more rollers superposed with their axes in a
vertical plane, and parallel to one another in combination with inclined screens
adapted to receive the material and pass it on from one pair of rollers to the next
pair of rollers beneath, at the same time separating the fine particles and means for
driving the rollers, substantially as described.
***
2nd. In a roller crushing mill, three or more rollers, superposed with their axes
horizontally disposed and parallel to one another in combination with means for
elastically and adjustably pressing the said rollers in contact with one another,
inclined screens adapted to receive the material and pass it on from one pair of
rollers to the next pair of rollers beneath, at the same time separating the fine
particles and means for driving the rollers and agitating the screens, substantially as
described.
3rd. The construction and arrangement of a roller crushing mill substantially as
described and illustrated in the accompanying drawings.
DARAT
ULLIS
y
FELL & JAMES,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicants.
FELL & JAMES,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicants.