Iм- DRAKEZEVAC T CaxamanARTAN AS M
Year: 1873

page_text: LETTERS PATENT to James Spencer and James Consterdine, both of
Hollinwood, in the County of Lancaster, for the Invention of "Iм-
DRAKEZEVAC T CaxamanARTAN AS M
.
PROVISIONAL SPECIFICATION left by the said James Spencer and
James Consterdine at the Office of the Commissioners of Patents,
with their Petition, on the 20th February 1873.
We, JAMES SPENCER and JAMES CONSTERDINE, both of Hollinwood,
in the County of Lancaster, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF WEIGHING MACHINES,"
to be as follows:
-
Our improvements are more particularly designed for what are called
"pit bank" weighing machines which are employed at collieries to
weigh the corves or tubs of coal as they are brought to the surface,
but they are equally applicable to other machines, such as are used for
weighing carts, lorries, and railway wagons.

page_text: The improvements relate, firstly, to the construction of the stool
which supports the weighing platform; and, secondly, to the con-
struction and arrangement of the steelyards for indicating the weight.
¡As regards the construction of the stool, we make the stool centres
on the cup and point principle, whereby we dispense with all check 5
links. We prefer to make the bottom centres on the levers cup-shaped,
so that they will contain oil, and the stool centres pointed to work into
them, by which means we obviate corrosion by keeping the centres
well lubricated, and also to prevent the possibility of their getting off
the centres.
>
In the upper part of the stool we also cast a suitable number of
recesses to contain oil, and having journal bearings in which revolve
the pulleys that support the turntable or platform, so that as the pulleys
revolve constantly in oil the friction is reduced to a minimum.
1
We also cast cross stays on the stool for carrying the centre pin on 1
which the table revolves.
As regards the steelyard or indicator, we form a compound steelyard
made of two bars connected rigidly together and all actuated from
the same centres, that is to say, we have an upper and an under
steelyard connected together by a bar at each end. The lower steel-
yard is marked with hundredweights or tons, as may be required. The
upper steelyard is divided into two parts by a fixed stop or collar; one
part being for the purpose of "tareing" or weighing the tub or corve,
and marked accordingly, and the other part being marked with the
smallest fractional parts that may be required for the class of goods
which the machine has to weigh.
९
The mode of using this weighing machine for weighing corves or
tubs of coal is as follows:-We first take the average tare by weighing
a number of corves or tubs, and we then set the tare weight on the
upper steelyard to correspond, and fix it by means of a thumbscrew.
If the weight of the corves or tubs does not vary more than can be
indicated by the number of fractional parts on the other scale of this
steelyard, we set the large weight on the lower steelyard to a point
indicating rather less than the lightest corve or tub would weigh,
and also fixed by a thumbscrew, and the machine is then set for the
particular work to be done. All that is now required, as each corvo
or tub is placed on the turntable or platform, is to slide the small

page_text: fractional weight on the upper steelyard till the required balance is
obtained and the correct nett weight is instantly indicated. If the
variations in the weights are more than can be indicated by the
fractional scale, then the large weight on the lower steelyard must be
moved also, but in most cases this is not requisite.
The sides of the steelyard are made angular, and both sides are
equally marked so that while one person weighs on one side for the
proprietor, another can check the weight on the other side on behalf
of the miner..
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Spencer and James Consterdine in the Great
Seal Patent Office on the 18th August 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES
SPENCER and JAMES CONSTERDINE, both of Hollinwood, in the County
of Lancaster, send greeting..
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twentieth day of February, in the year
of our Lord One thousand eight hundred and seventy-three, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto us, the said James Spencer and James
Consterdine, Her special license that we, the said James Spencer and
James Consterdine, our executors, administrators, and assigns, or such
others as we, the said James Spencer and James Consterdine, 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 "IM-
PROVEMENTS IN THE CONSTRUCTION OF WEIGHING MACHINES," upon the condition
(amongst others) that we, the said James Spencer and James Conster-
dine, our executors or administrators, by an instrument in writing under
our, or one of our or their, or one of their hands and seals, should par-
ticularly 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

page_text: filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said James Consterdine, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement and accompanying Drawings (that is to
say) :-
Our improvements are more particularly designed for what are called
"pit bank" weighing machines which are employed at collieries to
weigh the corves or tubs of coal as they are brought to the surface, 1
but they are equally applicable to other machines, such as are used for
weighing carts, lorries, and railway wagons.
The improvements relate, firstly, to the construction of the stool
which supports the weighing platform; and, secondly, to the con-
struction and arrangement of the steelyards for indicating the weight.
Such being the nature and object of our said Invention, we will now
proceed to describe more in detail the manner in which the same is
to be or may be performed or carried into practical effect, and in order
that the same may be clearly understood, we have annexed hereunto
a Sheet of Drawings illustrative thereof, and have marked the same 2
with figures and letters of reference corresponding with those in the
following explanation thereof.
Fig. 1 in the annexed Drawing is a vertical elevation of a "pit bank"
weighing machine constructed according to our Invention; and Fig. 2
is a partial section shown at right angles to the former; and Fig. 3 is a 2
plan view of the same with the turntable removed and the platform
partly broken away to show the arrangement of the working parts.
a, a, is the platform, and b, b, the standard; c, c, (Fig. 1) is the
turntable.
As regards the construction of the stool d, d, we make the stool 3
centres on the cup and point principle, whereby we dispense with all
check links. We prefer to make the bottom centres on the levers e, e,
and ff, cup-shaped, so that they will contain oil, and the stool centre
9, 9, pointed to work into them, by which means we obviate corrosion
by keeping the centres well lubricated, and also prevent the possibility 3
of their getting off the centres.

page_text: In the upper part of the stool we also cast a suitable number of
recesses h, h, to contain oil, and having journal bearings in which
revolve the pulleys i, i, that support the turntable or platform c, c,
50 that as the pulleys revolve constantly in oil the friction is reduced
to a minimum.
We also cast cross stays k, k, on the stool d, d, for carrying the centre
pin on which the table revolves.
As regards the steelyard or indicator, we form a compound steelyard
made of two bars 1, l, m, m, connected rigidly together and all actuated
from the same centres; that is to say, we have an upper steelyard 1, 1,
and an under steelyard m, m, connected together by a bar n; n, at each
end. The lower steelyard is marked with hundredweights or tons, as
may be required. The upper steelyard is divided into two parts by a
fixed stop or collar o, o; one part being for the purpose of "tareing"
or weighing the tub or corve, and marked accordingly, and the other
part being marked with the smallest fractional parts thay may require
for the class of goods which the machine has to weigh.
The mode of using this weighing machine for weighing corves or
tubs of coal is as follows:-We first take the average tare by weighing
a number of corves or tubs, and we then set the tare weight p, p, on
the upper steelyard 1, 1, to correspond, and fix it by means of a thumb-
screw. If the weight of the corves or tubs does not vary more than
can be indicated by the number of fractional parts on the other scale
of this steelyard, we set the large weight q, q, on the lower steelyard
to a point indicating rather less than the lightest corve or tub would
weigh, and also fix it by a thumbscrew, and the machine is then set
for the particular work to be done. All that is now required as each
corve or tub is placed on the turntable or platform is to slide the
small fractional weight r, r, on upper steelyard till the required balance
is obtained, and the correct nett weight is instantly indicated. If
the variations in the weights are more than can be indicated by the
fractional scale then the large weight q, q, on the lower steelyard m, m,
must be moved also, but in most cases this is not requisite.
The sides of the steelyard are made. angular, and both sides are
equally marked so that while one person weights on one side for the
proprietor, another can check the weight on the other side on behalf
of the miner.

page_text: Having now described the nature and object of our said Invention,
together with the manner in which the same is to be or may be per-
formed or carried into into practical effect, we wish it to be understood
that we claim as our Invention,―
First. Making the stool on the cup and point principle so as to
dispense with check links.
Secondly. Casting recesses in the same to contain oil wherein revolve
the pulleys that support the turntable, and casting therewith cross stays
to support the centre pin of the said turntable..
Thirdly. Constructing the steelyard of two bars, one above the other,
and connected rigidly at the ends; the upper bar being divided into
two by a fixed collar, on one of which works the "tare weight," and on
the other the small or fractional weight, the larger or main weight
being on the lower bar, all being constructed and operating substantially
as herein-before described and represented by the Drawing.
In witness whereof, I, the said James Consterdine, on behalf of
myself and the said James Spencer, have hereunto set my hand
and seal, this Sixteenth day of August, in the year of our Lord
One thousand eight hundred and seventy-three.
JAMES CONSTERDINE. (L.S.)
Witnessed by
JOHN HUGHES,
Clerk to George Davies, C.E.,
Patent Office,
St. Ann's Sq.,
Manchester.