I- PROVEMENTS IN HYDRAULIC PRESSES
Year: 1861

page_text: LETTERS PATENT to Walkden Thompson and Thomas Stather, of the
Borough of Kingston-upon-Hull, Engineers, for the Invention of "I-
PROVEMENTS IN HYDRAULIC PRESSES."
Sealed the 28th March 1862, and dated the 2nd October 1861.
PROVISIONAL SPECIFICATION left by the said Walkden Thompson and
Thomas Stather at the Office of the Commissioners of Patents, with
their Petition, on the 2nd October 1861.
We, WALKDEN THOMPSON and THOMAS STATHER, of the Borough of
Kingston-upon-Hull, Engineers, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN HYDRAULIC PRESSES," to be as follows:-
Our Invention relates to those presses in which one large and two small
pumps are employed for working a pair of presses, or double press.
Invention consists in fitting stop valves commanded by handles accessible to
the attendant, as shown in the accompanying Drawing, whereby communication
can be opened with both or either of the presses as required.
The Figure is a plan showing our Invention. A is the large pump;
B' and B2, small pumps; C', stop valve for large pump to press pipe D¹;
C, stop valve for large pump to press pipe D²; E', stop valve from small
pump B', to press pipe D¹; E2, stop valve from small pump B2 to press
pipe D; F, K, weights or valves. The pump B' has no connection with stop

page_text: valve E, nor with press pipe D. Each small pump has its separate stop valve
and press pipe. The large pump has two stop yalves, so that it may act with
either of the small pumps as may be required; all the stop valves have
separate handles, and are entirely under the control of the pressinan.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Walkden Thompson and Thomas Stather in the Great Seal
Patent Office on the 2nd April 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WALKDEN
THOMPSON and THOMAS STATHER, of the Borough of Kingston-upon-Hull,
Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by. Iler Letters
Patent, bearing date the Second day of October, in the year of our
Lord One thousand eight hundred and sixty-one, in the twenty-fifth year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto us, the said Walkden Thompson and Thomas Stather, Her special
licence that we, the said Walkden Thompson and Thomas Stather, our
executors, administrators, and assigns, or such others as we, the said Walkden
Thompson and Thomas Stather, 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 terin therein expressed, should and law-
fully 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 HYDRAULIC PRESSES," upon the condition
(amongst others) that we, the said Walkden Thompson and Thomas Stather,
or one of us, our executors or administrators, by an instrument in writing
under our, or their, or one of our or 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
Seal Patent Office within six calendar months next and immediately after the
date of the said Letters Patent.
NOW KNOW YE, that we, the said Walkden Thompson and Thomas
Stather, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement thereof, reference being had to the
Drawings hereunto annexed, that is to say:-
Our Invention relates to those presses in which one large and two small

page_text: pumps are employed for working a pair of presses, or double press. And our
Invention consists in fitting stop valves commanded by handles accessible to
the attendant, whereby communication can be opened with both or either of
the presses as required.
Figure 1 of the accompanying Drawings is a plan, Figure 2 a side elevation,
and Figure 3 an end view of a hydraulic press fitted in this manner.
A is the large pump; B' and B are the small pumps; C' is the stop valve
for the large pump to the press pipe D'; C² is the stop valve for the large
pump to the press pipe D; E' is the stop valve from the small pump B' to
the press pipe D; E is the stop valve from the small pump B to the press
pipe D; F is the lever for working the pumps; G, G, are the links; H is
the pillar or stand, and I, I, are the pump rams; J is the cistern; K, K, are
weights on the valves; L is the cross head, and M is a guide. The pump B¹
has no connection with the stop valve E, nor with the press pipe D; each
small pump has its separate stop valve and press pipe. The large pump has
two stop valves, so that it may act with either of the small pumps as may be
required. All the stop valves have separate handles, and are entirely under
the control of the pressman.
And having now described the nature of our said Invention, and in what
manner the same is to be performed, we declare that we claim, fitting stop
valves to hydraulic presses for opening a communication with both or either of
the presses, substantially as herein-before described and illustrated in the
accompanying Drawings.
In witness whereof, we, the said Walkden Thompson and Thomas
Stather, have hereunto set our hands and seals, this Thirty-first day
of March, One thousand eight hundred and sixty-two.