IMPROVEMENTS IN STEAM PUMPS, AND IN VALVES USED IN CONNECTION THEREWITH
Year: 1876

page_text: LETTERS PATENT to Frank Pearn and Sinclair Pearn, of the City of Manchester,
in the County of Lancaster, Engineers, for the Invention of "IMPROVEMENTS IN
STEAM PUMPS, AND IN VALVES USED IN CONNECTION THEREWITH.” A
PROVISIONAL SPECIFICATION left by the said Frank Pearn and Sinclair
Pearn at the Office of the Commissioners of Patents on the 25th April 1876.
FRANK PEARN and SINCLAIR PEARN, of the City of Manchester, in the County
of Lancaster, Engineers. "IMPROVEMENTS IN STEAM PUMPS, AND IN VALVES
USED IN CONNECTION THEREWITH."
Firstly. Our Invention relates to steam pumps, and consists in improvements in
the combination, arrangement, and construction of the mechanism.
For single
pumps we form the basc upon which the steam pump stands and in which the
bearings for the crank shaft are formed, the pump or ram barrel, the valves boxes,
air vessel, and framing to carry the steam cylinder all in one piece or casting, the part
for the valves and the air vessel being in one vertical hollow column having suitable
chambers for the valves and passages to and from the pump or ram barrel, which is
formed to project from one side of the vertical column or casting.
To the upper
part of the column or casting which forms the air vessel, and projecting from the
side, is cast the bottom of the steam cylinder, which is bolted to this bottom, the
piston rod of the steam cylinder being connected directly with the ram of the
pump. To the piston rod a connecting rod is jointed, the joint being formed by an
open slotted part of the connecting rod coming on each side of the ram, this con-
necting rod being an open frame (and made in two parts secured together when
required), one side of it passing on one side, and the other side of it on the other
side of the pump or ram barrel, being connected with the crank of the crank shaft
below the barrel, the axis of the crank shaft being horizontal and in a vertical
plane, passing through the vertical centre line of the column for for the air cylinder.
For double pumps the combination, arrangement, and construction is the same as
for the single pump above described, except that in the central column or casting
chambers are formed for two sets of valves, one for each pump, and another bottom
for the other steam cylinder, and a ram or pump barrel is cast on the opposite side
of the central column or casting, and the crank shaft has two cranks; thus, for a
double pump the combination consists of one vertical column or casting forming

page_text: valve chambers, passages, and air vessels with pumps and steam cylinder arranged
to project upon opposite sides of the central column. In some cases and for large
pumps the base part is made separate from the upper part, which is made to bolt
upon the base part, and in some cases the air vessel is extended upwards from the
level of the bottom of and between the steam cylinders, and above them if required.
According to another modification the crank shaft may be on one side of the ram
cylinder, and the piston rod may be jointed with a lever having its fulcrum in a
rocking link on the framing or in a slide, the connecting rod for the crank being
jointed to the said lever. In the case of a double steam pump the lever, link, or
slide and connecting rod are duplicated.
Secondly. Our Invention relates to valves for pumps which may be used in
combination with the above-described improvements in steam pumps, and consists
in an improved construction and arrangement. It is similar in arrangement to an
ordinary valve with a descending central stem, but besides the usual conical facing
and seating there is another conical facing and seating annular to the ordinary
seating and facing, the ring thus left in the valve and seating being connected to the
centre stem, and its bearing or guide by radial ribs.
'
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Frank Pearn and Sinclair Pearn in the Great Seal Patent Office on the
18th October 1876.
FRANK PEARN and SINCLAIR PEARN, of the City of Manchester, in the County
of Lancaster, Engineers. "IMPROVEMENTS IN STEAM PUMPS, AND IN VALVES USED
IN CONNECTION THEREWITH."
Firstly. Our Invention relates to steam pumps, and consists in improvements in
the combination, arrangement, and construction of the mechanism. For single
pumps we form the base upon which the steam pump stands and in which the
bearings for the crank shaft are formed, the pump or ram barrel, the valve boxes,
air vessel, and framing to carry the steam cylinder all in one piece or casting, the
part for the valves and air vessel being one vertical hollow column having suitable
chambers for the valves and passages to and from the pump or ram barrel, which is
formed to project from one side of the vertical column or casting. To the upper
part of the column or casting which forms the air vessel, and projecting from the
side, is cast the bottom of the steam cylinder, which is bolted to this bottom, the
piston rod of the steam cylinder being connected directly to the ram pump. To the
piston rod or to the upper end of the ram a connecting rod is jointed, the joint
being formed by an open slotted part of the connecting rod coming on each side of
the ram, this connecting rod being an open frame (and made in two parts secured
together when required), one side of it passing on one side, and the other side of it
on the other side of the pump or ram barrel, being connected with the crank of the
crank shaft which is below the barrel, the axis of the crank shaft being horizontal
and in a vertical plane, passing through the vertical centre line of the column for
the air cylinder. For double pumps the combination, arrangement, and construction
is the same as for the single pump above described except that in the central
column or casting chambers are formed for two sets of valves, one for each pump,
and another bottom for the other steam cylinder, and a ram or pump barrel is cast
on the opposite side of the central column or casting, and the crank shaft has two
cranks; thus, for a double pump, the combination consists of one vertical column
or casting, forming valve chambers, passages, and air vessel or vessels, with pumps
and steam cylinders arranged to project upon opposite sides of the central columu.
In some cases and for large pumps the base part is made separate from the upper
part, which is made to bolt upon the base part, and in some cases the air vessel is
extended upwards from the level of the bottom of and between the steam cylinders,
and also above them if required.

page_text: Secondly. Our Invention relates to valves for pumps which may be used in com-
bination with the above-described improvements in steam pumps, and consists in
an improved construction and arrangement. It is similar in arrangement to an
ordinary valve with a descending central stem, but besides the usual conical
facing and seating there is another conical facing and seating annular to the
ordinary seating and facing, and the rings or centre parts thus left in the valve and
seating are connected with the other parts by radial ribs.
.
Fig. 1 is a side elevation partly in section; Fig. 2, a front elevation; and Fig. 3,
a plan view and section below a horizontal line passing through Fig. 1, just above
the gland for the ram; these Figures illustrate our Invention as applied to single
steam pumps.
Fig. 4 is a side sectional elevation, and Fig. 5 a front elevation, and Fig. 6 a plan
section taken above the glands for the rams, these Figures illustrating our Inven-
tion as applied to double steam pumps.
Fig. 7 is a section illustrating a valve according to the second part of our
Invention.
A, foundation or bed, upon which a casting is secured, in which is formed the
base part carrying the bearings, for the crank shaft (a), the ram barrel or case b,
the valve passages for the inlet or suction valve c, the outlet valve d, air vessel e,
and the bottom (f¹) of the steam cylinder. The face or flange to which the pipe
for the water to the inlet valve is shown in dotted lines in Fig. 1, and at c¹, Fig. 2,
and the face or flange to which the outlet pipe is attached is also shown by dotted
line in Fig. 1, and at d¹, Fig. 2. The cover for closing the orifice giving access to
the inlet and outlet valves is at c for the inlet and d² for the outlet valve. fis
the steam cylinder; g, its piston rod; b¹, pump ram; b, gland; g¹, connecting rod
formed by an open frame, as herein-before explained (shown only in Fig. 2), jointed
to the upper part of the ram at g², and with the crank of the crank shaft below the ram
case or barrel; a is the crank shaft, and a¹ its fly wheel. The excentric h, excentric
rod h¹, and valve rod 2, is shown only in Fig. 1. In Fig. 4 the ram case or barrel,
passage valves, and air cylinder of the pump on one side are shown in section, and
an outside view of the parts of the pump on the other side is shown. The con-
necting rod upon one side is shown in Fig. 5, but they are not shown in Fig. 4, and
the excentrics, excentric rods, and valve rods are shown in Fig. 4, but are not
shown in Fig. 5. The parts of the double pump are constructed the same as those
for the single pump, and the letters of reference used in describing Figs. 1, 2, and 3,
are marked upon the same or similar parts in Figs. 4, 5, and 6, as follows :-A,
foundation or bed; a; crank shaft; a¹, fly wheel; b, ram cases or barrels; b², rams;
b, glands; c, suction valves; c¹, flange for pipe supplying the suction valves;
c, covers of openings giving" access to inlet valves; d, outlet valves to air vessel;
d, flange for outlet pipe from the air vessel; d², covers to openings giving access to
the outlet valves; e, air vessel, the upper part formed by two united cylinders
which communicate below the line ex; f, steam cylinders; f¹, bottoms of steam
cylinders; g, piston rods; g¹ connecting rods; h, excentrics; h³, excentric rods;
and h2, valve spindles.
The second part of our Invention is illustrated by Fig. 7. k the body of the
valve having a guide k¹ for the central stem of the valve l, and conical seatings
for the two facings of the annular valve () and a conical seating for a facing round
the stem (1) of the valve. The guide (¹) and central portion of the body part k is
carried by radiating arms k² placed at intervals, and the stem (7) and annular part
of the stem is connected in like manner by radiating arms 12. The valve (1) is
shown lifted when the fluid will pass through, as shown by the arrows.
We have now particularly described the nature of our said Invention and the
manner of carrying the same into effect, and claim as our Invention,
Firstly. The combination, arrangement, and construction of single steam pumps,
as herein-before described and illustrated by Figs. 1, 2, and 3, of the Drawings.
Secondly. The combination, arrangement, and construction of double steam

page_text: pumps, substantially as herein-before described and illustrated by Figs. 4, 5, and G.
of the Drawings.
Thirdly. The combination of parts to form a valve, as herein-before described
and illustrated by Fig. 7 of the Drawings.
In witness whereof, we, the said Frank Pearn and Sinclear Pearn, have here-
unto set our hands and seals, this Seventeenth day of October, in the year of
our Lord One thousand eight hundred and seventy-six.
אז נדו
ונד הזנד
FRANK PEARN.
(L...)
SINCLAIR PEARN.
(L.S.)