IMPROVEMENTS IN PUMPS
Year: 1883

page_text: LETTERS PATENT to Frederick Philip Preston, John Theodorc Prestige and
Edwin James Preston, trading under the firm of J Stone & C° of Deptford in
the County of Kent Engineers for an Invention of IMPROVEMENTS IN
PUMPS
"
"
PROVISIONAL SPECIFICATION left by the said Frederick Philip Preston,
John Theodore Prestige, and Edwin James Preston at the Office of the
Commissioners of Patents on the 12th December 1883.
FREDERICK PHILIP PRESTON, JOHN THEODORE PRESTIGE, and EDWIN JAMES
PRESTON trading under the firm of J. Stone & Co of Deptford in the County of
Kent Engineers
"IMPROVEMENTS IN PUMPS
"
The main object of this invention is to facilitate access to the pump valves for
clearing and repair, also to improve the construction generally.
For this purpose in the so called Stone's portable ship's pump and fire engine
having two vertical pump barrels each fitted with a bucket we form a chamber
below each bucket, and on the side of same we form an aperture which is provided
with a cover to which one of the suction flap valves is hinged, and we at the same
time change the position of the corresponding valve aperture nearer to that side of
the barrel where the said cover is fitted. The chamber may be confined in width
towards the interior so as to limit the air space between the bucket and the suction
valve. By this means we provide ready access to the bucket valve, as well as to
the suction valve. The covers are by preference fastened by means of hinged or
swing bolts to expedite the fastening and unfastening.-In order to do away with
the objectionable noise and jerk occasioned by the yoke or beam in the interior of
the pump top chamber which yoke at each stroke knocks against a stop in the
interior of the pump, we provide the pump on each outer side with a stop cast or
fitted on in such a manner as to distribute the blow over a suitably large surface of
the pump barrel, and we construct the pump handles with corresponding parts to
work against such stops and provide them or the aforesaid stops with india rubber
or other suitable buffers.

page_text: In the so called "Downton" three bucket pump we form a chamber between the
upper and middle buckets and also between the middle and lower buckets and
provide apertures with covers which by preference are fixed by hinged or swing
bolts to expedite the fastening and unfastening. In order to effect this without
making the pump too high to be conveniently worked we make the base plate of
such a shape that it does not interfere with the ready access to the lower of the
two chambers above referred to.
In place of the ordinary three throw cranks and bows we sometimes actuate the
pump buckets by means of tumblers or cams which are keyed on a straight shaft.
The tumblers have straps bolted around them and are at their lower ends connected
to the bucket rods.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Frederick Philip Preston, John Theodore Prestige, and Edwin
James Preston in the Patent Office on the 12th June 1884.
FREDERICK PHILIP PRESTON, JOHN THEODORE PRESTIGE, and EDWIN JAMES
PRESTON, trading under the firm of J. Stone & Co of Deptford in the County of
Kent, Engineers. IMPROVEMENTS IN PUMPS
"
The main object of this invention is to facilitate access to the pump valves for
clearing and repair also to improve the construction generally. For this purpose
in the so called Stone's portable ships pump and fire engine having two vertical
pump barrels each fitted with a bucket we form a chamber below each bucket, and
on the side of same we form an aperture which is provided with a cover to which
one of the suction flap valves is hinged, and we at the same time change the
position of the corresponding valve aperture nearer to that side of the barrel
where the said cover is fitted. The chamber may be confined in width towards
the interior so as to limit the air space between the bucket and the suction valve
By this means we provide ready access to the bucket valve as well as to the
suction valve. The covers are by preference fastened by means of hinged or swing
bolts to expedite the fastening and unfastening. In order to do away with the
objectionable noise and jerk occasioned by the yoke or beam in the interior of
the pump top chamber which yoke at each stroke knocks against a stop in the
interior of the pump, we provide the pump on each outer side with a stop cast or
fitted on in such a manner as to distribute the blow over a suitably large surface of
the pump barrel, and we construct the pump handles with corresponding parts to
work against such stops and provide them or the aforesaid stops with india rubber
or other suitable buffers.
Figure 1 of the accompanying drawings is a side elevation partly in section of a
so called Stone's Portable Ship's Pump and Fire Engine and Figure 2 is a plan
partly in section; A is one of the two buckets of the pump and B a chamber
formed below the bucket and on one side provided with an aperture which is
closed by a cover C. This latter is fastened in place by means of two hinged or
swing bolts D for ready removal and replacing. E is the suction valve which is
hinged to the cover C. F is the chamber below and partly between the two suction
valves. By removing the cover C access is readily obtained to the bucket A as well
as to the suction valve E which is hinged to the cover C. G is a bracket forming a
stop cast on the side of the body of the pump in such manner as to distribute the
blow of the yoke or beam against it and provided with elastic buffer G₁ for
deadening the blow and noise of the yoke or beam. Or the buffer may if desired
be fitted on the yoke or bean with the same object.
In the so-called Downton and other three bucket pumps we form a chamber
between the upper and middle buckets and also between the middle and lower
buckets and provide apertures with covers which by preference are fixed by binged
or swing bolts to expedite the fastening and unfastening. In order to effect this
without making the pump too high to be conveniently worked we make the base
plate of such a shape that it does not interfere with the ready access to the lower
of the two chambers above referred to.
In place of the ordinary three throw cranks and bows we sometimes actuate the
pump buckets by means of eccentrics or cams which are keyed on a straight shaft.
The tumblers have straps bolted around them and are at their lower ends connected
to the bucket rods.

page_text: Figure 3 is a vertical cross section through a Downton pump of our improved
construction and Figure 4 a part sectional end view of same. A is a chamber
formed between the upper bucket B and the middle bucket C, and D is a chamber
formed between the iniddle bucket C and the lower bucket E. These chambers A
and D have apertures which are closed by covers F and G which are held in place
by the swing bolts F1 and G₁. By removing these covers access to the buckets is
readily obtained. The chambers A and D being provided as shown the height of
the pump above the bottom flange H is necessarily increased but while thus shifting
the bottom flange H correspondingly lower down we form the base plate I
correspondingly shallower and thus maintain the same working height.
Figure 5 is a part sectional end elevation of our improved Downton pump
arranged to be worked by eccentrics K K K instead of by crank shaft. The
eccentric rods L are at their lower ends jointed to the bucket rods M.
And having thus described and ascertained the nature of this our invention and
the manner in which the same is or may be carried into effect we declare that we
claim :-
Firstly The improvements in the construction of the Stone's Portable Ship's
Pump and Fire Engine substantially as and for the purposes set forth.
Secondly-The improvements in the Downton and other three bucket Pumps
substantially as and for the purposes set forth.
In witness whereof I the said Edwin James Preston for myself and on behalf of
the said Frederick Philip Preston and John Theodore Prestige have hereunto set
my hand and seal this Eleventh day of June in the year of our Lord One thousand
eight hundred and eighty four.
EDWIN JAMES PRESTON (L.S.)