IMPROVEMENTS IN ROLLER' AND 'ROLLING' MILLS
Year: 1880

page_text: LETTERS PATENT to Charles Herbert, of Edinburgh, in the County of
Midlothian, North Britain, for an Invention of "IMPROVEMENTS IN ROLLER'
AND 'ROLLING' MILLS."
'
PROVISIONAL SPECIFICATION left by the said Charles Herbert at the
Office of the Commissioners of Patents on the 19th November 1880.
CHARLES HERBERT, of Edinburgh, in the County of Midlothian, North Britain.
"IMPROVEMENTS IN 'ROLLER' AND 'ROLLING' MILLS."
This Invention relates to an improvement applicable both to roller as well as
rolling mills of all kinds. The rollers or rolls are or may be carried on or in a lever
or levers, or they may be carried in plummer blocks capable of being adjusted by
the said lever or levers. These plummer blocks receive sliding motion through a
pressure pin or pins attached to the lever or levers. On the bottom end of the lever
or levers furthest from the fulcrum is cast a fork or slot, in which an excentric or
cam is made to revolve by a through going spindle below, the pressure being
given by means of an adjustable spring or weight, according to the nature of the
machine used. These eccentrics or cams are made to adjust on the spindle by
means of a screw. By this means the pressure obtainable by a spring or weight
may be varied by merely shifting the cams on the spindle. These cams allow of
no back-lash, and are made of steel to reduce the wear to a minimum. The levers
may be bushed with phosphor bronze slips or equivalently bard metal slips where
the cams bear on them.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles Herbert in the Great Seal Patent Office on the 19th May
1881.
CHRLES HERBERT, of Edinburgh, in the County of Midlothian, North Britain.
"IMPROVEMENTS IN ROLLER' AND ROLLING MILLS."
My Invention relates to improvements applicable both to roller mills and rolling
mills for applying the pressure to the adjustable rollers or rolls. According to my said
Invention the bearings or plummer blocks of the roller or roll, or rollers or rolls to be
adjusted is or are carried by or are adjustable by a lever or levers upon which an
eccentric or cam or eccentrics or cams is or are caused to act to give the requisite
pressure.
And in order that my said Invention may be properly understood I now
proceed more particularly to set forth the system, mode, or manner in or under
which the same is or may be used or practically carried into effect, reference being
had to the accompanying Drawings, and to the letters and figures marked thereon,
that is to say,-
Figures 1 and 2 represent in end elevations taken at right angles the one to the
other a single pair roller mill having my improvements combined therewith. The
two rollers are indicated by the dotted lines at A and A', the roller A being carried
in fixed bearings bolted to the seat on the frame of the machine, and the roller A¹
being the roller with which my improvements for applying or adjusting the
pressure are employed. The bearings A, in which the roller A¹ rotates are each
carried by a lever B capable of turning upon a fulcrum pin b, carried in bushes c,
in the bracket pieces e, formed on the framing of the machine. Extending from
side to side of the machine is a shaft F, capable of turning in bearings f. This
shaft has fixed thereto with hollow keys and set screws cams or eccentrically
mounted discs G, which engage respectively in forks, or slots at the lower end of
each of the levers B. Keyed to this shaft F is a lever H, the outer forked end of
which engages with a screw hand wheel i, which is made to fit the screw I. This
latter is held in position in the spring box I by a powerful volute steel or rubber
spring and screw nut j. By raising or lowering this forked end of the lever H the
cams Gare turned so as to move the tails of the levers B, and thus the pressure of
the roller carried thereby against the other roller is adjusted. The vertical adjust-
ment and lining" of the roll A' may be effected by adjusting the bushes by
means of the set screws 62, the slots in the lower ends of the levers B, in which the
cams G engage being sufficiently long to allow of the necessary adjustment.
"
Figures 3 and 4 represent in views taken at right angles the one to the other a
double roller mill to which my improvements are applied. As less pressure is
required owing to the rollers being shorter, in place of the long levers B, the axes
of the adjustable rolls are mounted in bearings carried by shorter levers B2 turning
on fulcrum pins 63, and attached to these bearings are slotted pieces k, in which
engage the cams G. The position of these cams are altered by means of levers and
a screw I acting essentially as described with regard to the arrangement, Figures 1
and 2, and corresponding parts are marked with the same letters of reference.
The pieces can be adjusted nearer to or further from the bearings by the screw
arrangements k². The bushes of the fulcrum pins 63 are adjusted by the set
screws b³, as described with regard to the arrangement, Figures 1 and 2.
Figures 5 and 6 represent in views taken at right angles the one to the other a
pair of heavy rolls to which my improvements are applied. In this modification
the bearings or plummer blocks a of the adjustable rolls are capable of sliding in
guides in the framing, and the levers Bs, operated as described with regard to the
arrangement, Figures 1 and 2, instead of carrying the said bearings or plummer

page_text: blocks, carry adjustable pins b*, which bear upon the said sliding bearings or
plummer blocks.
By the use of my improvements a pressure is applied to each end of the rolls
more equable than has been hitherto attained, and any wear tending to set the
centre lines of the rolls off the parallel can be readily compensated for by the set
screws 62 and 6' and 65, and levers (B, B2, or B³). Also any slackness of the bushes
can readily be taken up, and owing to the employment of cams back-lash is
prevented.
Having now described and particularly ascertained the nature of my said
Invention, and the system, mode, or manner in or under which the same is or may
be used or practically carried into effect, I would observe in conclusion that I wish
it to be understood that I do not limit myself to the precise details herein
described and illustrated in the accompanying Drawings, as the same may be
varied without departing from the essential nature of my Invention, but what
I consider to be novel and original and therefore claim as the Invention secured to
me by the hereinbefore in part recited Letters Patent is,-
First. The improvements in roller and rolling mills, consisting in applying and
adjusting the pressure to the roller or roll, or rollers or rolls thereof, by means of
cams operated and acting upon the bearings of the roller or roll, or rollers or rolls,
essentially as hereinbefore described with reference to the several Figures of the
accompanying Drawings.
.
Second. The arrangement essentially as described with reference to Figures 1
and 2 of the accompanying Drawings for applying and adjusting the pressure to
the roller or rollers, or roll or rolls of roller or rolling mills.
Third. The arrangement essentially as described with reference to Figures 3
and 4 of the accompanying Drawings for applying and adjusting the pressure to
the roller or rollers, or roll or rolls of roller or rolling mills.
Fourth. The arrangement essentially as described with reference to Figures 5
and 6 of the accompanying Drawings for applying and adjusting the pressure to
the roller or rollers, or roll and rolls of roller or rolling mills.
In witness whereof, I, the said Charles Herbert, have hereunto set my hand and
seal, this Sixteenth day of May, in the year of our Lord One thousand eight
hundred and eighty one.
CHARLES HERBERT. (L.S.)