Improvements in or connected with Compression Pumps for Gaseous or Vaporous Fluids.
Year: 1891

page_text: Date of Application, 28th Jan., 1891
Complete Specification Left, 27th Oct., 1891-Accepted, 28th Nov., 1891
PROVISIONAL DIECIFICATION.
Improvements in or connected with Compression Pumps for Gaseous
or Vaporous Fluids.
I, WALTER HENRY WEBB, of 59, Balliol Road, Bootle, in the County of
Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has reference mainly to that class of gaseous fluid pumps which
are employed in processes wherein the fluid-such as aminonia or other volatile
fluid is transformed from its gaseous or vaporous to its liquid state, that is to say,
processes in which liquification of a gascous or vaporous fluid is effected, or partly
effected, by compression.
According to the present invention, the valves of the compressing cylinders of
the pumps are fitted in a withdrawable seat box or case, such scat or case being
adapted to be fitted in place, or removed, in a horizontal direction, and from the
side of the machine, whilst the valve works in the vertical plane, being lifted off
its seat by pressure, and falling thereon by gravity, or by gravity in conjunction
with pressure.
This arrangement or combination is more particularly valuable and applicable in
cases where the pump cylinder is horizontally disposed, and lies upon a bed or base,
access below which is impossible or inconvenient.
In one arrangement the seat box or case is of cylindrical or other suitable shape;
and is fitted into a corresponding aperture in the pump cylinder metal, or part
connected therewith, and has an internal aperture by which the fluid is led from the
inlet pipe or conduit into the space wherein the valve works. This space or
aperture is at right angles to the said inlet aperture; and according to one arrange-
ment, is at both ends provided with a seat proper for the valve, so that if one face
became damaged or worn the box or case could be reversed and the other scat
used. The valve box or case, therefore when so constructed, is a double seated one,
and reversible.
The valve seat boxes or cases may be kept in place by suitable caps, covers, or
other suitable means, and made tight by a recessed packing, or the like.
When the pump cylinder is enclosed in a casing, and artificially cooled by a
liquid contained in or circulated through the casing, it (the casing) is provided with
removable covers, by which the valves and their seat boxes or cases may be put in
position or removed with facility; and the inlet and outlet pipes of the pump may
pass through said covers and made tight therein by suitable stuffing boxes.
The herein described improvements connected with the valves of pumps may be
applied to different parts or purposes therein; and they may be modified and
carried out in different forms, constructions, or combinations, according to the
different or varying conditions under which it is applied, or for the purposes for
which it may be used.
1001
CHEESBROUGH & ROYSTON,
15, Water Street, Liverpool, Applicant's l'atent Agents.

page_text: Improvements, in or connected with Compression Pumps for Gaseous
or Vaporous' Fluids.
I, WALTER HENRY WEBB, of 59, Balliol Road, Bootle, in the County of
Lancaster, Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained'
in and by the following statement :-
This invention has reference mainly, to that class of gaseous fluid pumps which
are employed in processes wherein the fluid-such as ammonia or other volatile
fluid is transformed from its gaseous or vaporous to its liquid state, that is to say,
processes in which liquification of a gaseous or vaporous fluid is effected, or partly
effected, by compression.
According to the present invention, the valves of the compressing cylinders of
the pumps are fitted in a withdrawable seat, box, or case, such seat or case being
adapted to be fitted in place, or removed, in a horizontal direction, and from the
side of the machine, whilst the valve works in the vertical plane, being lifted off its
seat by pressure, and falling thereon by gravity, or by gravity in conjunction, with
pressure.
This arrangement or combination is more particularly valuable and applicable in
cases where the pump cylinder is horizontally disposed and lies upon a bed or base,
access below which is impossible or inconvenient.
In one arrangement, the seat, box, or case is of cylindrical or other suitable
shape, and is fitted into a corresponding aperture in the pump cylinder metal, or
part connected therewith, and has an internal aperture by which the fluid is led
from the inlet pipe or conduit into the space wherein the valve works. This space
or aperture is at right angles to the said inlet aperture; and according to one
arrangement, is at both ends provided with a seat proper for the valve, so that if
one face becomes damaged or worn, the box or case could be reversed and the other
seat used. The valve box or case, therefore when so constructed, is a double seated
one, and reversible.
The valve seat boxes or cases may be kept in place by suitable caps, covers, or
other suitable means and made tight by a recessed packing, or the like.
When the pump cylinder is enclosed in a casing and sufficiently cooled by a
liquid contained in or circulated through the casing, it (the casing) is provided' with
removable covers, by which the valves and their seat boxes or cases may be put in
position or removed with facility and the inlet and outlet pipes of the pump may
pass through said covers and be made tight therein by suitable stuffing boxes.
In the drawings which serve to illustrate this invention, I shew a cylinder suitable
for compressing ammonia. or other gas, and provided with improvements under this
invention. In these drawings,
Figure 1 is a longitudinal section; and
Figure 2 is a cross section taken at the line X X Figure 1.
Referring to the drawings, a designates the inlet valves of the cylinder; bare
the seats of said valve consisting of the cylindrical plug, horizontally disposed;
c is the cylinder or pump barrel; d are casings formed on the cylinder e in which
the valve seat plugs are disposed and contained; é aré caps fitting over the ends
of the casings d; and plugs b, by which such plugs are held in position; el are
annular projections on the coverse, fitting in corresponding recesses partly in the
casing and partly in the plugs b, and by which, in conjunction with an annular
washer e, of leather or other suitable material, a fluid tight joint is made between
the said parts; is a casing outside the cylinder c by which the fluid used to jacket
or surround said cylinder, is contained; are doors thereon, and covering apertures
therein, through which access can be had at either side to the covers e and the
plugs b, and valves a; i is the pipe through which the liquid to be compressed is

page_text: introduced into the hollow centre of the plug b, it being secured to one of the
covers e, as shewn.
With reference to the other portion of the pump shewn in the drawings, p is the
piston; are the delivery valves which, as will be seen, are disposed at the top of
the cylinder at each end, access to them being obtained by removing the caps s;
t is the passage communicating with the chambers in which the delivery valves are
disposed, and through which the compressed gas or vapour passes from the cylinder,
u being the pipe by which such compressed gases or vapours are carried away to the
place where they may be used.
Referring to the particular construction of plugs b shewn in the drawings, it will
be seen that there is provided in that part of it where the valve a is disposed a
double seat band 62. By this construction, when, from any cause or reason, it is
desired to provide a new seat for the valve, it may be done by turning the plug b
round axially in its case d 180 degrees, and placing the valve upon the upper seat
so provided. To carry out this act, the covers e and h will be removed and the
plug withdrawn laterally from its case d, and then, when the new seat has been
placed uppermost, and the valve put in upon it, the plug with its valve are placed
in position, and the covers e and h are fixed, and firmly pressed down onto their
bearing surfaces by their securing bolts and nuts.
It will be readily seen from the above description or with reference to the
drawings, how that by this construction and disposition of parts, valuable facilities
are afforded in connection with pump cylinders horizontally disposed and placed
upon a bed or base plate (access to which below is either impossible or
inconvenient), for inspecting, or repairing the valves, whilst at the same time the
clearances in the cylinder are kept very small, which of course is an important
feature respecting the working of ammonia vapour at other equivalent gas or vapour
pumps or compressors.
The improvements herein described, regarding the seating of valves, may be
applied to the different valves of pumps, and to pumps differing in form and
arrangement to that shewn in the drawings and set forth, and they may be
modified in form and arrangement without departing from the spirit or scope of this
invention.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a pump, a lift-valve fitted in and adapted to work in a withdrawable seat,
as, or substantially as, herein set forth.
2. In a pump, the combination of a lift-valve u, withdrawable plug seat b, and a
seat casing d, and a cover or covers e; substantially as set forth.
3. The improved pump, having its parts constructed and adapted to operate as set
forth with reference to, and as shewn in the drawings.
4. A pump having a hollow removable valve-seat b, having two valve seats b₁
and a lift-valve a fitted in said valve seat and substantially directly under the centre
line of the pump cylinder, as shewn and set forth.
Dated this 22nd day of October 1891.
CHEESBROUGH & ROYSTON, Fels. Chart. Inst. P.A.,
15, Water Street, Liverpool, Applicant's Patent Agents.