Improvements in Machinery for Pumping Gaseous and other Fluids.
Year: 1895

page_text: Date of Application, 20th June, 1895
Complete Specification Left, 20th Mar., 1896-Accepted, 30th May,
1896
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Pumping Gaseous and other
Fluids.
We JAMES EGLINTON ANDERSON GWYNNE, Civil Engineer, of Brooke Street
Works, Holborn, in the County of London, and JOHN INGHAM, Engineer,
of 50 Gilstead Road, Wandsworth Bridge Road, Fulham, S.W. do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements in that class of machinery used for
pumping gaseous and other fluids, and has for its object the increasing of the
quantity pumped in a certain time without materially increasing the dimensions of
the machinery, and also the maintaining at a more constant pressure the fluid
pumped as recorded by the pressure gauge, than is now done by the machinery
commonly employed for this purpose.
This invention consists of a cylinder of cast iron or other suitable material,
provided with inlet and outlet ports or branches. This cylinder is fitted with ends
or covers, one or both of which may be formed separately and secured by bolts or
other convenient means. Each of these covers or ends carries a boss placed
eccentric, which boss is accurately bored out to fit the axle of a suitable roller,
and may be provided with stuffing box and gland at one or both ends if desirable,
to prevent leakage of gas, air etc., out of or into the cylinder. This roller is
accurately turned on its periphery, so that when its axle is supported in the bosses
on the cylinder ends, part of its surface is in close contact with a portion of the
interior of the cylinder, and the ends of the roller are turned so that each is in
contact with part of the surface of one of the cylinder ends. The roller has
three or more, preferably three, radial slots at equal distances apart, truly planed
out, extending from one end to the other, into each of these slots is accurately
fitted a suitable slide provided with one or more nose-pieces or slips and springs if
necessary, to ensure close contact between the interior of the cylinder and the
outer surface of a projecting boss or sleeve, formed on or attached to one or both
ends or covers of cylinder. The roller is also truly bored out in its interior, so
that its inner surface is in contact with the outer surface of said projecting boss or
sleeve on the cylinder cover or covers, whilst at the same instant its outer surface
is in contact with the internal surface of cylinder. Each cylinder end or cover is
provided with suitable passages or ports communicating between certain portions
of the internal space within the roller, and certain portions of the outer space
between roller and cylinder, it being desirable to have a communication between
the inlet branch or port of cylinder and the interior of roller, and also between
the interior of roller and the outlet branch or port of cylinder. The roller may
be formed with axle or body in one piece, or they may be separate pieces securely
attached together. The axle may be driven by means of pulley and belt, or
gearing, or it may be coupled direct to the motor shaft of a suitable engine,
either steam, gas, oil or water engine, or it may be driven by means of an electric
motor. The spaces within the roller and between the exterior of roller and
cylinder are so arranged that they practically constitute two or more separate
exhausters, pumps or blowers combined together aiding one another, and for a
machine of certain dimensions giving largely increased output over any of the
ordinary types of exhausters, pumps or blowers commonly in use, and the
distribution of the gas, air, water, oil or other fluid within these spaces is such,

page_text: that there is a tendency to equalise the intensity of the pressure of the fluid
within the said spaces at any instant, and thus obviate sudden fluctuations in
pressure, by which means the fluid may be exhausted, forced or blown with a
remarkably steady gauge. The machinery is so arranged also that it may be
run in either direction and may be used either for exhausting, pumping, propelling
or blowing as required.
Dend this 10th 1an of Tu 1905
Improvements in Machinery for Pumping Gaseous and other
Fluids.
We, JAMES EGLINTON ANDERSON GWYNNE, Civil Engineer, of Brooke
Street Works, Holborn, in the County of London, and JOHN INGHAM Engineer,
of 50 Gilstead Road, Wandsworth Bridge Road, Fulham, S.W. 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 relates to improvements in that class of machinery used for
pumping gaseous and other fluids, and has for its object the increasing of the
quantity pumped in a certain time without materially increasing the dimensions of.
the machinery, and also maintaining at a more constant pressure the fluid pumped as
recorded by the pressure gauge than is done by the machinery commonly employed
for this purpose.
In order that this invention may be properly understood we have hereunto
appended an explanatory sheet of drawings illustrative of the mode in or under:
which it is or may be used or carried out in practice; Figure 1 of the said
drawings being a longitudinal section of a pumping machine constructed according
to this invention. Figure 2 is a transverse section of same on the line X X
(Fig. 1) and Figure 3 is a transverse section of same machine on the line Y Y
(Fig. 1).
As seen by the Figures 1, 2 & 3, the apparatus consists of a cylinder a provided
with an inlet port or branch b and an outlet port or branch c. The cylinder a has
ends or covers d' d' one or both of which may be formed separately and secured
by bolts or other convenient means. ee are bosses carried by the ends d¹ d² and
placed eccentric to same. f is a roller the axis of which g is carried in bearings in
the bosses e e, h is a stuffing gland fitted into a recess in the boss e forming a
stuffing box which is suitably packed to prevent leakage of gas, air or other
fluid &c. out of or into the cylinder a. The roller is turned so that a portion of
its periphery is in contact with a portion of the interior of the cylinder a, whilst
the axle g is supported in the bosses e e, and the ends of the roller fare in close,
contact with parts of the inner sides of the ends d' d². The roller f has three
radial slots ii planed out at equal distances apart extending throughout the
length off, accurately fitting the slots iii are the slides jjj provided with the
nose pieces or slips kkk and springs behind to ensure close contact between these
nose pieces kkk carried by the slidesj jj and the interior of the cylinder a; also
between similar nose pieces provided at the opposite edges of the slides jjj and
the outer surface of the projecting bosses or sleeves II, formed on or attached to
the ends d' d'. The roller is bored out in its interior so that its inner surface is
in contact with the outer surface of the bosses whilst its outer surface is in
contact with a portion of the internal surface of the cylinder.a. One cylinder
end d¹ is provided with a suitable passage or port m communicating through the

page_text: Whilst
opening n with the space between the outer surface of roller ƒ and inner surface
of cylinder a. The passage m also communicates through the opening o with the
space in the interior of the roller f. In like manner the end d² is provided with
a suitable passage p which communicates with the interior of the roller through
the opening 9 and also through the opening r with the space between outside of
roller and inside of cylinder a. By means of this arrangement the gas, air or
other fluid enters the apparatus by the inlet branch b, one portion of which is
carried by the slides jjj through the space between the outer surface of roller f
and inner surface of cylinder a and discharged by the outlet branch c.
another portion of the gas, air or other fluid passes through the opening n into the
passage m thence through the opening o into the space in the interior of the
roller and passing from the end at which it was admitted into this space in
the interior of the roller through holes sss in the diaphragm or web t forming
part of the roller f towards the other end of the roller it is carried by the
slides jjj projecting within the interior of the roller to the opening 9 through
which it passes through the passage p and thence through the opening into the
space outside roller whence it is discharged through the outlet branch c.
It will be observed that the slides jjj are so arranged that at the instant when
the gas or other fluid is being carried under maximum pressure in the space
between the exterior of the roller f and the interior of the cylinder a the gas or
other fluid in the space in the interior of the roller fis being carried by the slides
projecting within the interior of the roller f under minimum pressure and vice
versa. Thus there is a tendency to equalise the intensity of the pressure of the
fluid within the said spaces at any instant and thus obviate sudden fluctuations in
pressure. It will be observed from the drawings that the apparatus may be run in
either direction, the inlet branch becoming outlet and the outlet becoming inlet
when the direction of rotation is reversed. This apparatus may be coupled direct
to the motor shaft of a suitable steam, gas, oil, or water engine, or it may be
actuated by means of an electric motor or may be driven by means of pulley and
belt or gearing.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
First. In rotary pumping machines the arrangement of cylinder, roller, slides,
openings, and passages substantially as herein before described and shown in
drawings hereunto appended and for the purposes hereinbefore set forth.
Second. The mode of increasing the quantity pumped in a certain time without
materially increasing the dimensions of the machine by utilising the space in the
interior of the roller substantially and for the purpose herein before described.
Third. The mode of equalising the intensity of the pressure of the fluid (whilst
being pumped) within the spaces in the interior of the roller and between the
exterior of the roller and interior of the cylinder as and for the purpose
herein before described.
Dated this Nineteenth day of March 1896.
D. W. PORTEOUS,
Agent for Applicants-J. E. A. Gwynne and John Ingham.