IMPROVEMENTS IN ROTARY PUMPS
Year: 1873

page_text: LETTERS PATENT to William Lloyd Wise, of Chandos Chambers,
Adelphi, in the County of Middlesex, Patent Agent, for the
Invention of "IMPROVEMENTS IN ROTARY PUMPS."-A communication
from abroad by Baron Gustave Greindl, of 20, Rue du Luxembourg,
Brussels, Belgium.
Sealed the 3rd June 1873, and dated the 4th April 1873.
PROVISIONAL SPECIFICATION left by the said William Lloyd Wise
at the Office of the Commissioners of Patents, with his Petition,
on the 4th April 1878.
I, WILLIAM LLOYD WISE, of Chandos Chambers, Adelphi, in the
County of Middlesex, Patent Agent, do hereby declare the nature of
the said Invention for " IMPROVEMENTS IN ROTARY PUMPS," to be as
follows:-

page_text: The nature of the Invention will be understood from the following
description thereof, reference being had to the accompanying Drawings,
in which Figs. 1 and 2 are sectional views, and Fig. 3 is an elevation
shewing the driving arrangements.
The improved pump is constructed with a body or casing A, closed by
a cover D, and provided with a flanged inlet B and a similarly flanged
outlet C.
The box or casing and its cover forming the body of the pump are
traversed by the shafts or axles F and G turning with slight friction in
stuffing boxes, as shewn. On the shaft or axle F is keyed a rotating
drum or cylinder H, fitting truly within the body of the pump, and
carrying, diametrically opposed to each other, the two wings or blades
I, I, each having a surface equal to the sectional area of the annular
space between the casing or box A, and the drum or cylinder H. These
wings are grooved and packed to prevent the passage of liquid between
their edges and the body, and to compensate for any wear which may
arise from working with sandy or gritty water. On the shaft or axle G
is fixed another drum or cylinder J, whose periphery touches that of the
drum or cylinder H, and which turns also without end play within the
body.
The shafts or axles F and G carry outside the body or casing two
toothed wheels, whose relation to one another is respectively as two is to
one, so that in turning the two wings of the cylinder F alternately
enter an epicycloidal channel or recess made in the cylinder J, as
shewn.
A stop partition M in the upper part of the interior of the body
prevents direct communication between the inlet and exit passages.
This partition is hollowed or recessed at N over the whole length of the
cylinder J in a position to counteract the pressure against the exposed
part of the drum or cylinder J of the column of water to be raised.
This recess can be put in communication with the exit pipe G by the
passage O, which can be regulated by a cock or screw valve P. Above
and laterally the liquid enters the body of the pump by the enlargements
U, U, and it is forced back also by the enlargements V, V, so that there
is neither compression on the side of the forcing back pipe nor vacuum
caused to the suction pipe when the wing leaves the channel or recess of
the upper cylinder. This cylinder is contained in a part Q bored and

page_text: interior of the cylinder J, whence it will escape by the opening Z made
in the opposite part of the cavity. This valve is only absolutely necessary
for
pumps of a certain volume.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Lloyd Wise in the Great Seal Patent
Office on the 4th October 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
LLOYD WISE, of Chandos Chambers, Adelphi, in the County of Middle-
sex, Patent Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent bearing date the Fourth day of April, in the year of our Lord
One thousand eight hundred and seventy-three, in the thirty-sixth year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said William Lloyd Wise, Her special license that I,
the said William Lloyd Wise, my executors, administrators, and 1
assigns, or such others as I, the said William Lloyd Wise, 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 and Ireland,
the Channel Islands, and Isle of Man, an Invention for "IMPROVE-
MENTS IN ROTARY PUMPS," a communication to me from abroad by Baron
Gustave Greindl, of 20, Rue du Luxembourg, Brussels, Belgium, upon
the condition (amongst others) that I, the said William Lloyd Wise, my
executors or administrators, by an instrument in writing under my, or
their, or one of their hands and seals, 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 Lloyd Wise, 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

page_text: in and by the following statement thereof, and the Drawings therein
referred to (that is to say) :-
The object of this Invention is to produce a cheap and efficient rotary
pump capable of being readily fixed, and of working with little friction.
The nature of the Invention will be understood from the following
description thereof, reference being had to the accompanying Drawings,
in which Fig. 1 is an elevation shewing the driving arrangements;
Fig. 2 is an elevation at right angles to the foregoing.
Fig. 3 is a vertical section at right angles to the axes of the rotating
drums; Fig. 4 is a vertical section at right angles to Fig. 3.
Figs. 5 and 6 are sectional views of the outlet enlargements of the box
or casing taken respectively in the lines 1-2, and 3, 4, of Fig. 3.
Figs. 7 and 8 are sectional views of the inlet or suction taken respec-
tively in the lines 5, 6, and 7, 8, of Fig. 3.
The sections of the escape and suction indicated in the Drawings are
respectively equivalent.
The improved pump is constructed with a body or casing A closed by
a cover D, and provided with a flanged inlet B and a similarly flanged
outlet C.
The box or casing and its cover, forming the body of the pump, are
traversed by the shafts or axles F and G, turning with slight friction in
stuffing boxes, as shewn. On the shaft or axle F is keyed a rotating
drum or cylinder H fitting truly within the body of the pump, and
carrying diametrically opposed to each other the two wings or blades
I, I, each having a surface equal to the sectional area of the annular
space between the casing or box A and the drum or cylinder H. These
wings are grooved and packed to prevent the passage of liquid between
their edges and the body, and to compensate for any wear which may
arise from working with sandy or gritty water. On the shaft or axle G
is fixed another drum or cylinder J, whose periphery touches that of
the drum or cylinder H, and which turns also without end play within
the body.
The shafts or axles F and G carry outside the body or casing two
toothed wheels l, m, whose relation to one another is respectively as two

page_text: enter an epicycloidal channel or recess e made in the cylinder J as
shewn. The recess e should be as small as possible at the circumference,
so that the cylinders J and H may be as long as possible in contact, and
the form of the recess should be such that compression of the liquid may
be obviated.
A stop partition M. in the upper part of the interior of the body pre-
vents direct communication between the inlet and exit passages. This
partition is hollowed or recessed at N over the whole length of the
cylinder J in a position to counteract the pressure against the exposed
part of the drum or cylinder J of the column of water to be raised. This
recess can be put in communication with the exit pipe C by the passage
O, which can be regulated by a cock or screw valve P. Above and
laterally the liquid enters the body of the pump by the enlargements
U, U, and it is forced back also by the enlargements V, V, so that there
is neither compression on the outlet or escape side, nor vacuum caused
at the inlet or suction pipe when the wing leaves the channel or recess
of the upper cylinder. This cylinder is contained in a part Q bored and
lined with metal, in which it turns and only just allows the wings I, I¹,
to pass.
The shafts or axles are of steel, and the stuffing boxes, &c., of gun
metal or bronze.
The shafts or axles are additionally supported by one or several
standards R provided with gun metal or bronze bearings, near to which
is fixed the driving pulley S. The whole is solidly secured to a
foundation T.
In pumps of large size, and those intended to lift liquid to a con-
siderable height in order to avoid too great a strain on the lower shaft
or axle, each of the two sides has in the interior a cylindrical part
(A¹,A,) of a slightly larger diameter than the cylinder H, and of a
breadth about half that of the case.
The contact of the upper cylinder takes place on the concave section
formed in the two cylindrical parts. The wings are fixed on the cylinder
H, and bear on the whole of their peripheries. Contact therefore takes
place over the whole concave surface of the two cylindrical parts in
contact with the upper cylinder, and the escapes are rendered less
sensible. In addition to this advantage the dimensions of the apparatus
are reduced, there being a saving in the casting of the case and of the

page_text: cover of the spaces to receive the packing, and the diameter of the lower
shaft can be considerably reduced.
The pump is supplied in addition with two cocks, one for emptying,
and the other for filling.
The action of the pump is as follows:-By rotation the water is drawn
into the body of the pump at a comparatively slow speed by the wings
I, I', which, by alternately entering the recess of the upper cylinder
force the liquid to rise continuously and without any sensible change of
velocity into the outlet and delivery main. The liquid entering the
channel N, and controlled by the stop partition M, counterbalances the
back pressure in the outlet, so that the upper cylinder is kept in
equilibrium.
In order to avoid any prejudicial pressure during the passage of the
liquid between X and Y (Fig. 3) during the movement of the wings in
the recess of the cylinder J, the saiḍ recess is furnished with a valve W
opening from below upwards. The water, by pressure in the space Y,
will force this valve open for the free passage of the water into the
interior of the cylinder J, whence it will escape by the opening Z made
in the opposite part of the cavity. This valve is only absolutely
necessary for pumps of large volume.
It will be evident that by slightly modifying the construction of the
apparatus it may be employed with a column of water, or for com-
pressing gases, as well as for other purposes.
Having described the nature of the said Invention of "Improvements
in Rotary Pumps," and having explained the manner of carrying the
same into practical effect, as communicated to me by my foreign corre-
spondent, I desire it to be understood that he does not confine himself
to the precise arrangement shewn in the Drawings, as the same may be
more or less modified without departing from the distinctive character of
the Invention; thus, for instance, the form of the inlet and outlet, and
the arrangements for actuating the drums H, J, may be varied according
to circumstances; the number of recesses e in the drum J will depend
(according to the purpose for which the pump may be intended) upon
the number of wings or blades I, I¹, carried by the drum H, and the
velocities of the two drums, and the wings or blades I, I', may be flat
or curved, so long as the essential characteristics of the Invention be

page_text: retained; and I hereby declare that under the Letters Patent granted to
me as aforesaid, I claim,—
The construction and arrangement of rotary pumps, as described.
I claim particularly the combination in a rotary pump of a drum or
cylinder carrying wings or blades with another drum or cylinder,
channelled or recessed as described, so that during the rotation of the
two drums or cylinders the wings or blades carried by the one drum or
cylinder alternately enter the channel or recess (or recesses) of the other
drum or cylinder, substantially as herein set forth.
I also claim in combination with the box or casing A, and drum or
cylinder J, the stop partition M recessed at N, and communicating with
the outlet C by a passage O regulated by a cock or valve, substantially
as described.
I also claim the arrangement of the inlet and outlet passages, as
described and shewn in the Drawings.
In witness whereof, I, the said William Lloyd Wise, have hereunto
set my hand and seal, this Fourth day of October, in the year
of our Lord One thousand eight hundred and seventy-three.