IMPROVEMENTS IN THE ADDADATING FOR ROLLING LEATHER
Year: 1871

page_text: LETTERS PATENT to John Priestman and Thomas Priestman, of the
Firm of John Priestman and Son, of Preston Brook, in the County
of Chester, Tanners, for the Invention of “IMPROVEMENTS IN THE
ADDADATING FOR ROLLING LEATHER"
AB
PROVISIONAL SPECIFICATION left by the said John Pricstman and
-
Thomas Priestman at the Office of the Commissioners of Patents,
with their Petition, on the 2nd September 1871.
We, JOHN PRIESTMAN and THOMAS PRIESTMAN, of the Firm of John
Priestman and Son, of Preston Brook, in the County of Chester,
Tanners, do hereby declaro the nature of the said Invention for
"IMPROVEMENTS IN THE CONSTRUCTION OF APPARATUS FOR ROLLING LEATHER,"
to be as follows :—
This Invention relates to improvements in the construction of
apparatus for rolling leather, whereby the work is done much quicker
and better than by the usual method.

page_text: The apparatus is constructed of metal uprights braced by a girder or
other connecting piece to render it rigid. The girder or a cross bar
supports depending or hanging brackets, in the lower end of which a
roller faced or not is held. Under the frame is a standard with
trunnions for supporting an oscillating frame, one end of which is
weighted for giving the necessary pressure upon the skins or pieces of
leather, which may be upon a roller at the other end of the oscillating
frame, which roller is driven by mechanical or other power direct, or
through the intervention of gearing, as found convenient. The top and
bottom rollers may be driven separately or together by spur gearing and
pinions, their relative speed being determined by the sizes of the wheels.
The lower roller is the larger of the two, and receives a slow rotary
motion compared to that of the upper roller, between both of which the
skins pass, the pressure exerted upon them being due to the over-
hanging weight on the free end of the oscillating frame.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Priestman and Thomas Priestman in the
Great Seal Patent Office on the 2nd March 1872..
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
PRIESTMAN and THOMAS PRIESTMAN, of the Firm of John Priestman
and Son, of Preston Brook, in the County of Chester, Tanners, send
grecting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing 'date the Second day of September, in the year of
our Lord One thousand eight hundred and seventy-one, in the thirty-fifth
year of Her reign, did, for Herself, Her heirs and successors, give and
- grant unto us, the said John Priestman and Thomas Priestman, Her
special licence that we, the said John Pricstman and Thomas
Priestman, our exccutors, administrators, and assigns, or such others
as wo, the said John Priestman and Thomas Priestman, our executors,
administrators, and assigns; should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for “IMPROVEMENTS IN THE

page_text: CONSTRUCTION OF APPARATUS FOR ROLLING LEATHER," upon the condition
(amongst others) that wo, the said John Priestman and Thomas
Priestman, or one of us, our executors or administrators, by an instru-
ment in writing under our, or one of our or their, or one of their hands
and seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Scal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that we, the said John Priestman and Thomas
Priestman, do hereby declare the nature of our said Invention, and
in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement thereof,
reference being had to the Drawings hereunto annexed, that is to say :-
-
This Invention relates to improvements in the construction of
apparatus for rolling leather, whereby the work is done much quicker
and much better than by the usual method.
The apparatus is constructed of metal uprights, braced by a girder or
other connecting piece to render it rigid. The girder or a cross bar
supports depending or hanging brackets, in the lower end of which a
faced roller is held. Under the frame is a standard with trunnions for
supporting an oscillating frame, one end of which is weighted for giving
the necessary pressure upon the skins or pieces of leather, which may be
upon a roller at the other end of the oscillating frame, which roller is
driven by mechanical or other power direct or through the intervention
of gearing, as found convenient. The top and bottom rollers may be
driven separately or together by spur gearing and pinions, their relative
speed being determined by the sizes of the wheels. The lower roller is
the larger of the two, and receives a slow rotary motion compared to
that of the upper roller, between both of which the skins pass, the
pressure exerted upon them being due to the overhanging weight,
on the free end of the oscillating frame.
The Invention will be well understood by reference to the accompany-
ing Drawings, in which Figure 1 is a front view of an apparatus in
which the rollers are fitted for acting upon the hides or skins which are
to be operated upon, as before mentioned; Figure 2 is a view of ono

page_text: end, and Figure 3 a view of the other end of the same; Figure 4 veing
a plan thereof.
a, a, arc metal uprights braced by a girder b, one of the uprights
being at one end of the apparatus and the other at or about the middle,
so as to leave a portion c of the girder overhanging to form a support
for one end of the shaft d, upon which the small roller e is mounted, the
larger roller being held between standards g, g, secured to the base or
bed plate by screw bolts or other suitable means; the base plate being
rigidly attached or fixed on a foundation i composed of stone or other
material. There is a space between the lower portions of the
standards g, g, for permitting rods j, j, of the balance-weight lever k to
rise and to fall according to the variable thicknesses of the hides to bo
passed between the roller e and the larger roller f, which larger roller
is, as before stated, driven at a different speed to the roller e by tho
gearing 2, m, which receives its motion from a strap upon the riggor or
pulley or other arrangement. The shaft p, upon which the larger
roller is mounted, has a knuckle joint at q, so that it can rise and fall
with the bearings r, r, which are arranged between the cheeks 8, 8, of
the standards g, g. There is also a knuckle joint on the shaft w, the
two joints working in unison, forming what is known as the universal
joint. The weight upon the lever / can be made adjustable, so as to
determine the pressure that shall be exerted upon the leather ;. the
pressure can also be removed at any instant by a pressure of the foot of
the attendant upon the lever x which is centred at y, so that tho
short end nearest the weight can be raised; the longer end being carried
to the and sufficiently far as to be within reach of the attendant's foot.
It will be seen that the weighted lover k is fulcrumed to the bracket z,
and its short arm A to the cross head B of the connecting rods j, j, but
any other method of arranging the lever or other parts of the apparatus
can be employed as found desirable, the main point upon which our
Invention is based being that of operating upon hides, skins, or pieces of
leather by two rollers, one of which is adjustablo and driven at a
different speed to that of the other, so that the process of rolling is
more expeditiously effected than is usual. No claim is however made
to the special apparatus shown in the Drawings, nor to the driving of
the two rollers by the combined gearing as they can be driven
separately, as before explained.