Year: 1899

page_text: I, CHARLES JOHN ROBINSON, of Railway Works, Rochdale, in the County of
Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
-
The object of this invention is to provide roller mills in which the main
framing shall be so formed as to be of great strength while being of less weight
and allowing of easier access to the casing, rollers, and connections than has been
possible hitherto, and easy fitting to the floor of a mill; in which the bearings
of the rollers shall be so arranged as to admit of easy and very acourate adjust-
ment of the rollers; and in which vibration or shaking of the casing or cover
by the motion of the feed tray shall be almost entirely prevented and conse-
quently such casing and its connections to the frame may be made much lighter
and simpler and easier removed than has been the case hitherto.
For these purposes I form the side frames without bottoni rails but with legs
to rest on the floor and I dispense with the usual connecting top rails which
obstruct access to the casing and I connect the frames together by means of a
single rail at each end disposed just beneath the end doors in the casing and not
projecting outwards beyond such doors. The dispensing with the connecting
top rails also reduces weight and facilitates the fitting of the bearings of the
rollers. The levers carrying the bearings of the movable rollers are so pivotted
that such rollers when being adjusted move angularly towards the stationary
rollers instead of directly. In this way the motion of the ends of the levers for
adjustment may be made as great a multiple as desired of the motion of, the
rollers directly towards each other, at the same time the greater portion of the
strain of grinding is taken by such levers and less by the adjusting screws:
The springs which actuate the feed tray in one direction are arranged outside
the casing and are connected at their ends to a bar or shaft passing freely
through the casing and secured to such feed tray, and are also connected through
adjusting screws to brackets carried on the side frames so that practically no
motion or vibration is communicated to the casing which being thus free from
vibration can be made lighter and attached in an easier and simpler manner
to the frames preferably by means of brackets to those parts of the frames which
carry the shaft for giving motion to the tray.
.

page_text: what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement, reference being had to the accom-
panying drawings
The object of this invention is to provide roller mills in which the main
framing shall be so formed as to be of great strength while being of less weight
and allowing of easier access to the casing, rollers, and connections than has been
possible hitherto, and easy fitting to the floor of a mill; in which the bearings
of the rollers shall be so arranged as to admit of easy and very accurate adjust-
ment of the rollers; and in which vibration or shaking of the casing or cover
by the motion of the feed tray shall be almost entirely prevented and conse-
quently such casing and its connections to the frame may be made much lighter
and simpler and easier removed than has been the case hitherto.
For these purposes I form the side frames without bottom rails but with legs
to rest on the floor and I dispense with the usual connecting top rails which
obstruct access to the casing and I connect the frames together by means of a
single rail at each end disposed just beneath the end doors in the casing and not
projecting outwards beyond such doors. The dispensing with the connecting
top rails also reduces weight and facilitates the fitting of the bearings of the
rollers: The levers carrying the bearings of the movable rollers are so pivotted
that such rollers when being adjusted move angularly towards the stationary
rollers instead of directly. In this way the notion of the ends of the levers for
adjustment may be made as great a multiple as desired of the motion of the
rollers directly towards each other, at the same time the greater portion of the
strain of grinding is taken by such lovers and less by the adjusting screws.
The springs which actuate the feed tray in one direction are arranged outside
the casing and are connected at their ends to a bar or shaft passing freely
through the casing and secured to such feed tray, and are also connected through
adjusting screws to brackets carried on the side frames so that practically no
motion or vibration is communicated to the casing which being thus free from
vibration can be made lighter and attached in an easier and simpler manner
to the frames preferably by means of brackets to those parts of the frames which
carry the shaft for giving motion to the tray.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a side elevation and Fig. 2 is an end elevation of a roller mill em-
bodying my invention. a are the side frames provided with legs which rest
on the floor and can be easily fitted thereto. care single rails for connecting
the side frames together so as to form the main frame of the mill of great strength
with a minimum of weight. The rails care as shown so disposed below and
not projecting beyond the doors d in the casing e that such casing and the rol-
lers &c. therein are easier of access than when projecting top connecting rails
are used. are the bearings of the movable rollers g, these bearings are car-
ried on levers pivotted to the frames a at i close to the bearings of the
stationary rollers & so that when the ends of the levers h are moved for adjustment
by means of the screws and nuts the movable rollers 9 move towards the sta-
tionary rollers & in an angular direction thus allowing of great accuracy of adjust-
ment while the ends of the levers h may have comparatively large movement.
By this arrangement also the levers h take the greater portion of the strain
caused by the passage of the material between the rolls. m are springs outside
the casing e and carried by adjusting screws and nuts n on brackets o attached
to the frames a. The springs m press against a bar p which is attached to the feed
tray and passes freely through the casing e. Motion in one direction is given
to the bar and with it to the feed tray 7 by means of excentrics r on a rotating
shafts in the usual way and the springs move the bar and feed tray in the
opposite direction. By the springs not being connected to the casing suci
casing is practically free from vibration and may be made lighter and easier of
attachment to the frames a say by brackets such as t

page_text: 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:-
First. Constructing frames for roller mills with legs and single non projecting
connecting end rails arranged substantially as and for the purposes set forth.
Second. In roller mills, pivotting the levers carrying the movable rolls close
to the bearings of the stationary rolls substantially as and for the purposes set
forth.
Third. In a roller mill, frames provided with legs and single non projecting
connecting end rails and with pivots for the movable roll levers arranged close
to the bearings of the stationary rolls, and with springs for actuating the feed
tray all substantially as and for the purposes set forth.
Dated this Thirtieth day of March 1900.
W. B. JOHNSON,
4, Clayton Square, Liverpool, Agent.