IMPROVEMENTS IN STOCKS USED IN THE MANUFACTURE OF LEATHER, ALSO APPLICABLE TO OTHER PURPOSES." PROVISIONAL SPECIFICATION
Year: 1880

page_text: LETTERS PATENT to Benjamin Wright and David Wright, of Oxford Works,
Meanwood Road, Leeds, in the County of York, Engineers, for an Invention of
"IMPROVEMENTS IN STOCKS USED IN THE MANUFACTURE OF LEATHER, ALSO
APPLICABLE TO OTHER PURPOSES."
PROVISIONAL SPECIFICATION left by the said Benjamin Wright and David
Wright at the Office of the Commissioners of Patents on the 1st May 1880.
BENJAMIN WRIGHT and DAVID WRIGHT, of Oxford Works, Meanwood Road,
Leeds, in the County of York, Engineers. "IMPROVEMENTS IN STOCKS USED IN
THE MANUFACTURE OF LEATHER, ALSO APPLICABLE TO OTHER PURPOSES."
In carrying this Invention into effect, we first construct either in one casting or
more, as may be most convenient, and by preference in such a manner as to render
the entire machine "self-contained;" the main or general "bed" and frame of the
machine which is to contain or to constitute a pair of stocks. Then upon upon one
end of this casting or frame we fit a tall overhanging standard for carrying "side
by side," and in a pendulous manner the pair of vibrating or oscillating stocks
which in most respects may be of the ordinary "make" or construction.
We next construct and fix upon the opposite or contrary end of the main frame
or bed a pair of "pedestals" with bearing brasses, and a "two-throw" double
crank with driving pulley and fly-wheel upon its straight revolving ends; the said
cranks being exactly opposite to each other as to position and time, with respect
to or as regards their "connecting rod" bearings.
Having fitted and fixed in a substantial manner the beforenamed parts, we now
construct a pair of what we shall term "telescopic elastic connecting-rods" for
coupling the pendulous stocks to the before-described cranks, and conveying the
required movement to them.
These rods are so constructed that, whilst their pulling length is definite, their
pushing length is only definite up to a certain amount of resistance, beyond which
they have the power to yield, compress, or shorten, and thus, under certain
circumstances, prevent damage to the hides or other material, whilst the cranks
pass over their insido centres; whereas, if the stocks were compelled to travel the

page_text: full stroke of the cranks under all circumstances, damage to the hides or other
material would ensue.
In constructing these elastic connecting rods we prefer to make their ends and.
"bearings" as heretofore, and to insert a parallel bored tube in the central portion,
and into this we fit a long sliding block similar to a piston, and we pass the
parallel rod which this is upon through a packing box fitted upon one end of the
said tube; the spring for elasticity being by preference in front of the sliding
block or piston, and the space between the latter and the packing box being
occupied with leather, india-rubber, or other suitable cushioning or "buffer" rings
which encircle the rod, and fill the cylinder or tube.
In some cases we prefer to obtain the necessary elasticity by the employment of
broad flat springs secured in a firm and substantial manner to the before-described
pendulous stocks, on the side or face nearest to the cranks, and also near the top
or point of suspension; the bottom or free ends of these springs being jointed to
ordinary connecting rods, in lieu of the before-described telescopic ones, and in this
case the definite pulling action or length may be obtained by "banking stops"
"check straps" or chains, as may be most convenient, but in all cases we prefer to
construct this portion of our Invention in an adjustable manner, to be varied as
circumstances may require.
"
or
As a means of further increasing the convenience and utility obtained by our
Invention, we construct that portion of the bottom case or "bed" against which
the hides or other material roll and rub through the action of the stocks, known as
the "stock back," in such a manner that it can be removed and replaced, or
changed and adjusted without disturbing any other parts of the apparatus ; and in
some cases we prefer to rib or corrugate or otherwise make uneven the inside
surface of this curved back, for the purpose of increasing the rapidity of effect, and
the general efficiency of the machine.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Benjamin Wright and David Wright in the Great Seal Patent
Office on the 1st November 1880.
BENJAMIN WRIGHT and DAVID WRIGHT, of Oxford Works, Meanwood Road,
Leeds, in the County of York, Engineers. "IMPROVEMENTS IN STOCKS USED IN
THE MANUFACTURE OF LEATHER, ALSO APPLICABLE TO OTHER PURPOSES."
In carrying this Invention into effect, we first construct either in one casting or
more, as may be most convenient, and by preference in such a manner as to render
the entire machine "self contained," the main or general "bed" and frame of the
machine which is to contain or to constitute a pair of stocks. Then upon one end
of this casting or frame we fit a tall over-hanging standard for carrying side by
side, and in a pendulous manner the pair of vibrating or oscillating stocks which
in most respects may be of the ordinary "make" or construction.
We next construct and fix upon the opposite or contrary end of the main frame
or bed a pair of "pedestals" with bearing brasses, and a "two throw" doublo
crank with driving pulley and fly-wheel upon its straight revolving ends, the said
cranks being exactly opposite each other, as to position and time, with respect to
or as regards their "connecting-rod" bearings.
Having fitted and fixed in a substantial manner the before-named parts, we now
construct a pair of what we shall term " telescopic elastic connecting rods" for
coupling the pendulous stocks to the before-described cranks, and conveying the
required movement to them.
These rods are so constructed that, whilst their pulling length is almost definite,
their pushing length is only definite up to a certain amount of resistance, beyond
which they have the power to yield, compress, or shorten, and thus, under certain
circumstances, prevent damage to the hides or other material whilst the cranks pass
over their inside centres; whereas if the stocks were compelled to travel the full
stroke of the cranks under all circumstances, damage to the hides or other material
would ensue.
In constructing these elastic connecting rods, we prefer to make their ends and
"bearings" as heretofore, and to insert a parallel bored tube in the central portion,
and into this we fit a long sliding block, similar to a piston, and we pass the
parallel rod which this is upon through a packing box guide fitted upon one and of
the said tube, the spring for elasticity being by preference in front of the sliding
block or piston, and the space between the latter and the packing box being occupied
with a spring or with leather, india-rubber, or other suitable cushioning or "buffer"
rings which encircle the rod and fill the cylinder or tube.
In some cases we prefer to obtain the necessary elasticity by the employment of
broad flat springs secured in a firm and substantial manner to the before described
pendulous stocks on the side or face nearest to the cranks, and also near the top or
point of suspension, the bottom or free ends of these springs being jointed to
ordinary connecting rods, in lieu of the before-described telescopic ones, and in this
case the definite pulling action or length may be obtained by "banking stops" or
"check straps" or chains, as may be most convenient, but in all cases we prefer to
construct this portion of our Invention in an adjustable manner, to be varied as
circumstances may require.
As a means of further increasing the convenience and utility obtained by our
Invention, we construct that portion of the bottom case or bed" against which
the hides or other material roll and rub through the action of the stocks, known as
the "stock back" in such a manner that it can be removed and replaced or changed
and adjusted, without disturbing any other parts of the apparatus; and in some
cases we prefer to rib or “corrugate" or otherwise make uneven the inside surface

page_text: of this curved back for the purpose of increasing the rapidity of effect and the
general efficiency of the machine.
In the accompanying illustrations, Figure 1 is an elevation, and Figure 2 is a
plan, both partly in section of a pair of stocks with the springs applied in the
connecting rods, as at a and b, and showing the separate or adjustable "stock
back," and the manner in which it may be corrugated, as at c, d; and Figure 3 is
an elevation in part, in which a flat spring is applied to the stock, and the ordinary
connecting rod employed.
Having now described and particularly ascertained the nature of the said
Invention, and the manner in which the same is or may be used or carried into
effect, we wish it to be understood that we do not confine or restrict ourselves to the
precise details or arrangements which we have described or referred to, as many
modifications and variations may be made therefrom without deviating from the
principles or main features of the said Invention, but what we consider to be novel
and original, and therefore claim as the Invention secured to us by the herein-before
in part recited Letters Patent is,-
First. The application and use in pendulous or other stocks of a spring or springs
or other equivalent elastic or yielding medium between the stock and the crank,
by preference but not necessarily in the connecting rod, for the purpose of allowing
the stock to yield or accomodate its stroke or "travel" to the state or requirement
of the hides or other material, so as to prevent damage thereto.
Second. The constructing of that portion of the foot or bed of the stock framo
against which the hides or other material are pressed by the stocks (known as the
stock back) in such a manner that it can be removed and replaced or changed and
adjusted without disturbing any other parts of the machine.
Third. The constructing of the "stock back" with a ribbed, corrugated, or otherwise
uneven surface, for the purpose of increasing the efficiency of the machine, virtually
as or after the manner of the foregoing description.
In witness whereof, we, the said Benjamin Wright and David Wright, havo
bereunto set our hands and seals, this Thirtieth day of October, in the year
of our Lord One thousand eight hundred and eighty.
Witness,
HORACE DAWES,
Staveley,
Westmorland.
BENJAMIN WRIGHT. (L.S.)
DAVID WRIGHT.
(L.S.)