Improvements in Steam Pumps.
Year: 1889

page_text: Date of Application, 24th Jan., 1889
Complete Specification Left, 14th Oct., 1889-Accepted, 30th Nov., 1889
PROVISIONAL SPECIFICATION.
Improvements in Steam Pumps.
I, ROBERT HOLT of Ashfield Cottage Deeplish Road, Rochdale in the County of
Lancaster, Machine Pattern Maker, do hereby declare the nature of this invention to
be as follows :—
My invention relates to double and direct acting steam pumps. The chief feature
of this invention consists in providing in one cylinder two pistons, which pistons act
respectively as piston and plunger at opposite ends of the cylinder.
"
This invention consists in providing a suitable piston rod conveniently provided with
two pistons in a cast iron cylinder of suitable length, mounted on a suitable bed plate,
being of similar construction as a steam engine cylinder (which cylinder I preferably
form in two halves or sections) provided with the usual covers or end plates and steam
chest with slide valve, in a central position within the cylinder is provided a plate or
division piece. through which passes the piston rod, the interior of the cylinder being
thus divided into two separate chambers a piston being situated in each chamber
respectively, the space enclosed or intervening between the pistons and the division
plate or partition piece being steam cavities or spaces each in communication with a
steam port or orifice, each port having an alternate communication with an exhaust
passage, which communication is controlled by the action of the slide valve situated in
the steam chest.
The spaces between the covers and the pistons being water cavities or spaces which
spaces have respectively a communication with inlet orifices, which communicates with
the source from which the water is required to be raised, such orifices being provided
with valves, the cylinder covers or ends also being provided with orifices and valves,
which orifices or outlet passages each communicate with a discharge orifice.
At any convenient part of the piston rod is connected a suitable lever, the other
end of which lever passes between or through suitable slides or guidos provided in a
convenient bracket, in which guides the lever at that part is free to slide or if desired
the lever may be slotted and free to work about a fixed stud or pivot, at any con-
venient part between its extremities is connected or attached a connecting rod, the
other end of the connecting rod being attached to the slide valve spindle.
This invention is operated as follow:
Steam being adinitted into one section of the cylinder between one of the pistons
and the division piece or plate water is drawn through the valve covering the inlet
orifice into the other sectional part of the cylinder, when the exhaust port is opened,
the water thus raised is forced out through valve situate at the entrance of the outlet
orifice, water at the same time being drawn through the valve covering the inlet
orifice in the other section or half of the cylinder.
Dated this 23rd day of January A.D. 1889.
JOHN H. BUTTERWORTH,
Agent to the Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam Pumps.
I ROBERT HOLT of Ashfield Cottage Deeplish Road Rochdale in the County of
Lancaster Machine Pattern Maker, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
My improvements relate to double and direct acting steam pumps.
The chief feature of my invention consists in the employment of a single cylinder

page_text: adapted to perform the functions of a steam cylinder and a water cylinder in which
two pistons are employed each piston acting respectively as a steam piston and water
piston or plunger.
My invention consists in employing in conjunction with a divided or double
cylinder of suitable length mounted upon a bed plate; a piston rod upon which I
mount two pistons a piston being situate in each compartment the cylinder being
similar in construction to a steam engine cylinder with the exception that my cylinder
is composed of two parts or sections of equal length and being divided internally at the
part forming the joint or division of the two parts by means of a plate or division
piece, through which passes the piston rod, the rod being surrounded at that part by
means of a gland and packing, the two sections being bolted together, their outward
ends-that is, the ends opposite to the ends joined together are each provided with
a cover. Two steam orifices lead from a steam chest or chamber each terminating
within each section of the cylinder each termination being situate ou opposite sides of
the division plato and between or intercepting a surface of the division plate and a
surface of a piston located in each section.
A slide valve situate in the steam chamber is adapted to control the admission of
steam on to the pistons which valve is caused to operate by the aid of suitable levers
in connection with any convenient moving part of the pump, or may be operated by
the aid of suitable levers and a cam.
The spaces onclosed on each side of the division plato between the plate and the
pistons being steam spaces, each having alternate communication with the steam
chamber which is effected by the medium of the slide valve, an alternate communi-
cation also being effected between each orifice and an exhaust passage through which
exhaust steam may pass out to the atmosphere or pass to a suitable condenser. The
spaces or compartiments situate between the end covers and the other opposite surfaces
of the pistons that is, the surfaces opposite to the surfaces exposed to steam-being
water spaces, each having a communication with an inlet orifice communicating with
a well or water source, also with an outlet orifice communicating with a discharge
orifice, the inlet and outlet orifices being provided with valves; if desired the outlet
orifices may be situated within the end covers, or both inlet and outlet orifices may be
situate in valve boxes cast or affixed to the sections formning the cylinder.
My invention may be compounded in any convenient manner for the purpose of
forming a duplex pump. In order that my invention may be better understood I have
reference to the accompanying sheets of drawings in which like letters of reference
indicate like parts throughout the figures therein shewn.
Figure 1 represents an elevation of my invention. Figure 2. is a plan of Fig. 1.
Figure 3 is an end elevation of Fig. 1.
Figure 4. is a sectional elevation showing an arrangement in which the inlet and
outlet valves may be situate within a valve box outside the cylinder. Fig. 5 is a
detail of Figure 6.
Figure 6 represents an elevation shewing a method of compounding or connecting
the piston rods of a duplex pump.
Within a metal cylinder formed of parts or sections and mounted upon a bed plate, I
employ two pistons 6,6¹ mounted on the rod c, the portion of the rod situate between the
pistons passes through a division plate d. see Fig. 1. which plate is secured in position
in an annular recess formed in the abutting ends or flanges of the sections a, and a¹,
the plate is provided with a gland and packing fin order to prevent any escape of
steam from one side of the plate to the other side thereof;
the spaces
enclosed
between the surface of the division plate d and the surface of the piston b, the opposito
surface of the plate and the surface of the piston 6, being steam spaces, into which
spaces, steam is allowed to pass through the orifices g g' leading from the chamber h.
into which chamber steam is allowed to pass from a steam supply pipe, the admission
of steam into the cylinder and the emission of steam therefrom into the oxhaust
passage which exbaust passage may lead out to the atmosphere or to a suitable
condenser being controlled by the action of the slide valve j, which valve is caused
to operate by the aid of the lever k. in engagement with the valve spindle l, which

page_text: spindle is actuated by means of a cam m, sliding bar o, and lever p. on the rocking
shaft r, the cam m, being operated by means of a crank M attached to the crank
pin J.
The position of the valve as shewn in Fig. 1. shews the orifice g¹ uncovered, being
open for the admission of steam from the chamber h into the steam space between the
division plate and piston in section a¹, steam previously passed into the space on the
other side of division plate being section a, being forced therefrom into the exhaust
passage i, during the period of movement of the pistons, in the direction indicated by
the arrows, water is being drawn-into the space enclosed between the cover and the
piston b, from the suction pipe s. and through the valve t, at the same time water is
being thrust out of the space between the piston 6' and the cover ¹ through the
valve t¹, from thence passing to the discharge pipe u above which I provide an air
vessel v, during this operation the cover of the outlet valve wo is caused to press against
its seat and likewise the cover of the inlet valve w².
In order to facilitate inspection or repairs of valves and gland fas may be necessary
I provide openings or hand holes opposite to the inlet and outlet valves I also provide
a hand hole in the side of the cylinder (section a¹) opposite to the gland in division
plate d, thus such parts are easily accessible, the openings being closed by lids or
covers z z. z¹ 2¹ upon which are cast lugs 28 with which the valve covers
engage when lifting, the opening in the cylinder being covered by a lid 2, the said
lids being secured in position by means of bolts. To the end of the piston rod.. is
secured a slotted slide blook A being secured thereto by means of a screw threaded
stud or pin B, or by means of a gib C, and cottar D as shown in Fig. 6, the piston
rod may be continued in length by the part E. which passes through the brass lined
boss F, the part E may be secured by means of a pin G or by means of a cottar H
and gib I Fig. 6. the disc or crank pin J. is situate within the slot of the slide block,
the disc K being carried by the shaft n, which shaft is supported by suitable
bearings LL, the cam crank M on the cain shaft N being supported by bearing O.
A fly wheel P may be employed, the employment of which is preferable in order to
ensure more uniformity or regularity in working than would be the case without such
wheel.
According to another construction or modification of valve arrangement as shown in
Fig. 41 shew a sectional elevation of a valve box R. in which I locate the inlet and
outlet valves w' and ', the box shewn in the drawing is cast in one piece with section a'
of the cylinder a similar box being employed or cast with section a, in which the
valves and t may be provided or situated, or the said boxes may be affixed to flanges
provided on the cylinder sections, if desired, the lower part of the box being open to
the suction pipes, the upper part being open to the discharge orifice u, the box
being closed by means of a cover R' secured by means of bolts to the flange R', the
cover R¹ being provided with a stop piece T with the lower part of which the valve
cover of the valve t¹ may engage with when lifting.
According to another arrangement two cylinders may be compounded or combined
either arranged side by side their axes paralell, or may be arranged in accordance
with the tandem principle, the cylinders in that case being in the same axial line,
which latter arrangement I show in Figure 6; such a combination forming a duplex
pump. When the piston rods of two apparatus are to be connected I preferably con-
nect the said rods to the slide block in manner as shewn in Figure 5, in accordance
with this arrangement I provide the bosses V. V₁ of the block, each with a loose bush
or ring V, as shewn in the drawing the bush is represented to be removed from the
boss U¹, the bore of the bushes being equal to the diameter of the piston rods, the
said bushes being secured in position with the rods by the cottars and gibs-the rod c
only being shewn as secured as the fastenings pass through slots W, X provided in
the bushes and piston rods respectively. When it is desired as the case may be to
uncouple the two apparatus and to work one pump only, one of the bushes must be
removed, when the rod remains stationery at the full length of the stroke, suppose for
example, that it is desired to uncouple the rod c, upon the bush being removed, an
annular space is formed around the end of the rod c', see Fig. 5; the block in such a

page_text: case being attached only to the rod c, which block at each return stroke of the rod c..
envelopes the end of the piston rod c¹, thus by this means injury may be obviated to
the end of the rod e' or the block A, which may be the case if the end of the rod c¹
were to pass into an aperture in the block the bore of which aperture being equal in
diameter to the said rod.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed I declare that what [
claim is.
1. In a direct acting steam pump the use and employment of a double or divided
cylinder, which cylinder being adapted to act as or perform the functions of a
steam cylinder and a water cylinder, in which is employed two pistons each acting at
one operation as a steam piston and a water piston.
2. The combination of a double or divided cylinder formed of two parts or
sections a. a¹, and a division plate d, each section having inlet and outlet valves t, w¹,
and, w, respectively, or such valves situated within a valve box outside the said
said sections, and the piston rod e upon which are mounted two pistons 6, 61, substan-
tially as and for the purposes herein fully set forth and described in the annexed
drawings.
3. The steam orifices g. 91, leading from the steam chamber h. and terminating on
each side of the division plate d, and intercepting respectively, the piston 6 and the
plate d, the piston 61 and the plate d, substantially as and for the purposes herein
fully set forth and described in the annexed drawings.
Dated this 12th day of October A.D. 1889.
ROBERT HOLT.
J. H. Butterworth,
For the Applicant.