IMPROVE- MENTS IN PUMPS, WATER METERS, AND ENGINES FOR OBTAINING MOTIVE POWER
Year: 1871

page_text: LETTERS PATENT to William Henry Barlow, of No. 2, Old Palace
Yard, in the City of Westminster, for the Invention of "IMPROVE-
MENTS IN PUMPS, WATER METERS, AND ENGINES FOR OBTAINING MOTIVE
POWER."
Sealed the 13th February 1872, and dated the 12th September 1871.
PROVISIONAL SPECIFICATION left by the said William Henry Barlow
at the Office of the Commissioners of Patents, with his Petition,
on the 12th September 1871.
I, WILLIAM HENRY BARLOW, of No. 2, Old Palace Yard, in the
City of Westminster, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN PUMPS, WATER METERS, AND ENGINES FOR OBTAINING
MOTIVE POWER," to be as follows:-
This Invention has for its object improvements in pumps, water
meters, and engines for obtaining motive power, and consists in con-
structing pumps, water meters, or engines of a hollow cylinder in which
a smaller cylinder is made to revolve or is carried round, so that the

page_text: exterior surface of the smaller cylinder is always kept in contact with or
very close to the inner surface of the larger cylinder. The larger
cylinder is closed at its ends, and the ends of the smaller cylinder work
fluid-tight or nearly so against such ends. Two communications, one
for ingress and the other for egress, are made with the external cylinder,
and it is convenient to bring these two communications into one aperture,
occupying about one-sixth part of the circumference of the outer
cylinder. To the interior or smaller cylinder is attached a plate or flat|
surface which terminates in a roller or boss, and as the internal cylinder
is carried round within the larger cylinder this roller or boss works to
and fro in one of the ports or passages which passes out radially from
the larger cylinder. The side edges of the plate or flat surface work
fluid-tight or nearly so against the ends of the cylinder and also of the
above-mentioned port. This port is made larger than the diameter of
the boss or roller for a considerable portion of the distance travelled by
the boss in order to permit water or other fluid to pass round one side
while the other side of the boss moves in contact with the opposite
surface of the port. Towards the extremity of the stroke, when the boss
arrives nearly at its greatest distance from the larger cylinder, the port
is contracted so that the boss works fluid-tight or nearly so within the
port, and closes it during that portion of the revolution of the smaller
cylinder in which such cylinder passes in front of the inlet and outlet
aperture. Where the port in which the boss works is enlarged small
projections are formed at each side of the interior of the port to cause
the boss to remain in contact or nearly so with the opposite surface
of the port, or the boss may otherwise be held up to such surface. In
place also of employing a roller or boss at the extremity of the flat
division plate to form the valve for closing the port or passage at the
extremity of the stroke, the movement of the division plate might
otherwise be arranged to control the closing of the port at this time, as
for example, the division plate might be jointed to another plate capable
of turning on a joint at its opposite end, and this latter plate might
be arranged to act as a valve to close the port at the extremity of the
stroka
A convenient way of causing the interior cylinder to revolve within
the outer cylinder is to mount the interior cylinder upon a pin carried
at one end by a disc which revolves in a recess at one end of the outer
cylinder and is fixed to a shaft which passes out through such end.

page_text: When used as a pump the shaft is made to revolve, and the interior
cylinder so caused to revolve within the outer cylinder. Water will
then be drawn in at one of the passages leading to the exterior cylinder
and expelled from the other, and whilst the inner cylinder passes across
the aperture, where both passages lead into the exterior cylinder one of
the ports or passages will be closed, as above explained.
>
The same apparatus may be used as an engine, admitting the steam or
fluid with which it is worked at one of the ports and letting it pass out
at the other; or it may be applied to the purposes of a water meter for
measuring the volume of water passed through it, the apparatus being
then made double acting, and counting mechanism being connected
therewith to register the number of revolutions made. The apparatus.
may be made double acting by employing two pumps or engines, so
arranged that the full power of the one is acting at the time the port
of the other is closed. This may be done by using two discs and two.
internal cylinders within one large internal cylinder, or by placing two
external cylinders side by side and connecting the shafts by means of
gearing or otherwise.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Henry Barlow in the Great Seal Patent
Office on the 12th March 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
HENRY BARLOW, of No. 2, Old Palace Yard, in the City of Westminster,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twelfth day of September, in the year
of our Lord One thousand eight hundred and seventy-one, in the
thirty-fifth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Henry Barlow, Her specia
license that I, the said William Henry Barlow, my executors, adminis-
trators, and assigns, or such others as I, the said William Henry
Barlow, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times thereafter
during the term therein 'expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
I

page_text: and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN PUMPS, WATER METERS, AND ENGINES FOR OBTAINING MOTIVE
POWER," upon the condition (amongst others) that I, the said William
Henry Barlow, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and scals, should
particularly describe and ascertain the nature of the said Invention, and
in what manner the same was to be performed, and cause the same to
be filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Henry Barlow, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement thereof, that is to say :-
This Invention has for its object improvements in pumps, water
moters, and engines for obtaining motive power.
In the Drawings hereunto annexed, Figures 1 shew various views of a
single acting pump or engine constructed according to
my Invention.
The pump or engine shown in these Figures is composed of a hollow
cylinder A, in which a smaller cylinder B is made to revolve or is
carried round, so that the exterior surface of the smaller cylinder is
always kept in contact with or very close to the inner surface of the
larger cylinder. The larger cylinder A is closed at its ends, and the
ends of the smaller cylinder work fluid-tight or nearly so against such
ends. Two communications C, C, one for ingress and the other for
egress, are made with the external cylinder, and it is convenient to bring
these two communications into one aperture, occupying about one-sixth
part of the circumference of the outer cylinder. To the interior or
smaller cylinder is attached a plate or flat surface D, which terminates
in a roller or boss E, and as the internal cylinder is carried round within
the larger cylinder this roller or boss works to and fro in one of the ports
or passages which passes out radially from the larger cylinder. The side
edges of the plate or flat surface work fluid-tight or nearly so against the
ends of the cylinder, and also of the above-mentioned port. This port is
made larger at C₁ than the diameter of the boss or
considerable portion of the distance travelled by the boss in order to
permit water or other fluid to pass round one side while the other side
of the boss moves in contact with the opposite surface of the port.
Towards the extremity of the stroke, when the boss arrives nearly at its
roller for a

page_text: greatest distance from the larger cylinder the port is contracted so that
the boss works fluid-tight or nearly so within the port, and closes it
during that portion of the revolution of the smaller cylinder in which
such cylinder passes in front of the inlet and outlet aperture. Where
the port in which the boss works is enlarged small projections are
formed at each side of the interior of the port to cause the boss to
remain in contact or nearly so with the opposite surface of the port, or
the boss may otherwise be held up to such surface.
1
A convenient way of causing the interior cylinder B to revolve within
the outer cylinder A is to mount the interior cylinder upon a pin carried
at one end by a disc F, which revolves in a recess at one end of the
outer cylinder, and is fixed to a shaft G which passes out through such
end, as shewn in the Drawings. In place also of employing a roller or
boss E at the extremity of the flat division plate D to form the valve for
closing the port or passage at the extremity of the stroke, the movement
of the division plate might otherwise be arranged to control the closing
of the port at this time, as for example, the division plate might, as shewn
in the sectional view, Figure 2, be jointed to another plate D', capable
of turning on a knuckle joint at its opposite end. While the cylinder B.
is passing from 2 to y the exterior surface of the joint D³ is close up to
the interior of the casing at z, and the passage C is thereby closed.
1
When used as a pump the shaft is made to revolve and the interior
cylinder is caused to revolve within the outer cylinder, water will then
be drawn in at one of the passages leading to the exterior cylinder and
expelled.from the other, and whilst the inner cylinder passes across the
aperture where both passages lead into the exterior cylinder one of the
ports or passages will be closed, as above explained.
!
The same apparatus may be used as an engine, admitting the steam or
fluid with which it is worked at one of the ports and letting it pass out
at the other. The apparatus may be made double acting by employing
two pumps or engines so arranged that the full power of the one is
acting at the time the port of the other is closed. This may be done by
using two discs and two internal cylinders within one large internal
cylinder, as shown at Figure 3 of the Drawings. In this Figure A is the
external cylinder, A', A', the end covers thereof; G, G, are the 'driving
shafts on which are the discs F carrying the pins F", these pins are also
connected to the central disc F2. The shafts G, discs F, F, and pins Fr
may all be cut out of one piece of metal. B, B, are the inner or smaller
.

page_text: cylinders. In order to place these cylinders on to the pins F, it is
convenient to form the cylinders with a moveable piece o, which when in
place can be fixed to the other part of the cylinder by pins r, as shewn
at Figure 2.
For the purposes of a water meter I form the apparatus to be double- 5
acting, as shewn at Figure 3, and connect to it counting mechanism to
register the number of revolutions of the shaft G, and thereby indicate
the quantity of water that has passed through the meter.
Having thus described the nature of my Invention, and the manner of
performing the same, I would have it understood that what I claim as 1
my improvements in pumps, water meters, and engines for obtaining
motive power is,—
1. The combined arrangements of apparatus, substantially as described
and shewn at Figures 1 and 2.
2. The combined arrangement of double acting apparatus, substantially 1
as described and shown at Figure 3.
In witness whereof, I, the said William Henry Barlow, have here-
set my hand and seal, this Twelfth day of March, in the year of our
Lord One thousand eight hundred and seventy-two.
W. H. BARLOW. (L.S.)