IMPROVEMENTS IN PUMPS
Year: 1874

page_text: LETTERS PATENT to Robert Hulme and Edward Lund, junior, both
of Salford, in the County of Lancaster, Engineers, for the Invention
of "IMPROVEMENTS IN PUMPS."
Sealed the 13th May 1875, and dated the 17th November 1874.
PROVISIONAL SPECIFICATION left by the said Robert Hulme and
Edward Lund at the Office of the Commissioners of Patents,
with their Petition, on the 17th November 1874.
We, ROBERT HULME and EDWARD LUND, junior, both of Salford, in
the County of Lancaster, Engineers, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN PUMPS," to be as follows:-
Our Invention relates to those pumps commonly called donkey pumps,
and which are placed upon a bed plate, whereby the whole becomes a
machine complete in itself and capable of being moved bodily from one
situation to another, and our said Invention consists in applying above
the said bed plate an air chamber, into which the supply fluid is drawn

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Robert Hulme and Edward Lund in the Great
Seal Patent Office on the 15th May 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ROBERT
HULME and EDWARD LUND, junior, both of Salford, in the County of
Lancaster, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventeenth November, in the year
of our Lord One thousand eight hundred and seventy-four in the
thirty-eighth year of Her reign, did for Herself, Her heirs and successors,
give and grant unto us, the said Robert Hulme and Edward Lund, junior,
Her special license that we, the said Robert Hulme and Edward
Lund, our executors, administrators, and assigns, or such others as
we, the said Robert Hulme and Edward Lund, junior, 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 "Iм-
PROVEMENTS IN STEAM. PUMPS," upon the condition (amongst others) that
we, the said Robert Hulme and Edward Lund, junior, by an instrument
in writing under our hands and seals, or under the hand and seal of one
of us, 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.

page_text: 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 Invention relates to those pumps commonly called donkey pumps,
and which are placed upon a bed plate, whereby the whole becomes a
machine complete in itself, and capable of being moved bodily from one
situation to another, and our Invention consists in applying above the
bed plate an air chamber, into which the supply fluid passes through
the suction pipe, and from thence to one or more pump barrels.
In the accompanying Drawing we have shewn an arrangement of
double pump with our Invention applied, the upper and driving parts
however being omitted as having no connection with the improve-
ment.
Fig. 1 is a cross section-through one set of valves, pump rod, and bed
plate; Fig. 2 is a view taken at right angles to Fig. 1; Fig. 3 is a similar
view to Fig. 2, but with the bed plate and our improved air chamber in
section; and Fig. 4 is a plan view of the bed plate, and for clearness of
description we will suppose for the present that..one pump only is
employed.
At a is the bed plate, upon which are mounted two hollow pillars b, c,
united at their upper ends, and carrying the driving apparatus in any
ordinary manner. Within the pillar bare the valves d, e, below the latter
of which is a chamber communicating by a pipe 9 formed in the bed
plate, with a chamber constituting an air. vessel situate therefore on the
inlet side, i being the suction pipe. Above the valve d is a pipe k, which
passes across and is open to the hollow pillar c, which communicates with
the outlet pipe b. At m is the ram, driven in any suitable manner, and
drawing and forcing the fluid as indicated by the arrows.
Thus far the description has referred to one pump only, but the
Drawing shews two as being the more customary arrangement, and the
same letters of reference as those above used, but with the addition of
an, indicate similar parts connected with the second pump, and it will
be seen that both of them are connected to the air vessel / by the
pipes g, g*, which constitute one passage.
It will now be seen that in our improved arrangement the air vessel is
placed on and above the bed plate, and shewn in the Drawing as cast

page_text: therewith, but it may be formed as a separate part, and fixed thereto in
the same situation in any suitable manner:
Having thus described and ascertained the nature of our said Invention
and the manner in which the same is to be performed; we desire it to be
understood that we do not limit ourselves to the general arrangement 5
shewn and described, but claim as secured to us under the above recited
Letters Patent, and in reference to sucli pumps as aforesaid, the use of
an air vessel or vessels situate on and projecting above the upper surface
of the bed plate on the suction side of the pump.
In witness whereof, I, the said Edward, Lund, junior, have here- 1
unto set my hand and seal, this Fourteenth day of May, in
the year of our Lord One thousand eight hundred, and seventy-
five.
EDWARD LUND, JUN³. (L.S.)