Year: 1888

page_text: Date of Application, 16th Jan, 1888
Specification Accepted, 9th Mar., 1888
Fig. 1 is a side elevation of my improved rotary pump as set up for underground
drainage.
Fig. 2 is a top plan view of my apparatus.
Fig. 3 is a longitudinal vertical section on the line X, X, of Fig. 2.
Fig. 4 is a transverse vertical section on the line Y, Y, of Fig. 2.
Fig. 5 is a detail perspective view of the drum and shaft with the piston wings in
connection therewith.
Fig. 6 is a detail perspective view of the piston slides.
A indicates the outer cylindrical shell or casing, having securing flanges A¹ on each
of its sides to which the heads A² are secured by bolts A³. The heads A² of the
shell A have lugs A* cast therewith, which are adapted to be attached to a suitable
supporting framework. A shaft B is cast integral with the internal drum C, passes
through the heads A², the ends of the shaft B extend outside of the heads A², one end
thereof being supported by a journal B¹, on one side of one of the heads, and the other
Price Rd

page_text: end passing through a journal B2, which may have suitable stuffing boxes fitted
therein. The shaft B on the side of the journal B2, extends out from the head
adjacent thereto a short distance, and has a suitable power medium mounted thereon,
preferably a bevel gear wheel B³ as shown in the drawings.
The shell A has a pipe P, connected to the under portion thereof for the ingress of
water, while a pipe P¹, of smaller diameter is connected to the upper part of the shell
for the egress of the water. The pipo P1 is formed with an elbow extending a short
distance away from the shell so that the water forced up through it will not receive
the full resistance of the atmospheric pressure directly on the exit-opening, thereby
allowing a somewhat easier upward flow.
The curves of the central wall of the shell, both upper and lower, are struck from a
common centre, and therefore have the same radii, the radius of the upper wall H is
shorter than that of the lower wall J, the two curves being connected by shorter
curves struck from different centres than are the said upper and lower walls. These
short connecting curves as shown in the points K and L are of greater inclination,
than the curves of the upper and lower walls for a purpose which will be hereinafter
described, this series of curves forms an irregular ellipse whose diameter is equal in
all directions on a line drawn through the central point I. This point I is also the
central point of the shaft B, upon which is mounted the metallic drum C, which has
consequently the same centre; the upper part of this drum C rests against the upper
part of the internal wall of the shell, and being of shorter diameter than the lower
wall J, a space of predetermined width is left between the said lower wall J, and the
lower peripheral edge of the drum C, the shaft B passes transversely through this
drum, being cast integral therewith.
Non frictional piston slides D and D¹ pass transversely through the drum C, and
shaft B, at right angles to each other, thereby dividing the said drum into quadrangular
sections, which are cast hollow as shown in Figs. 3 and 5 leaving the heads peripheral
surfaces, and division walls on each side of the piston slides D and D' of suitable
thickness to resist the hydraulic strain exerted thereon. A series of openings C¹, is
cut through each head of the drum C which extends back a short distance from the
peripheral edge of the said drum, the remaining portions of the said heads being
constructed in the form of a well which extends to the shaft B, forming a solid top
wall on each side of the drum. The peripheral walls of said drum are also solid
except at the points where slots are formed for the passage of the piston slides D
and D', the said slots extending across the entire peripheral surface or walls. The
quadrangular sections are thus provided with a wall on each side, the internal
portion being left hollow and constructed by means of a core casting. By this means
a lighter as well as a stronger and more durable construction is obtained.
As shown in Fig. 6 one of the piston slides D is constructed of a single piece of
metal, and the other slide D¹ of two sections which if united will be of the same
length as the slide D. The slide D has a slot D2 cut at its central portion, and
extending down about midway or below the central point of its width; in like manner
the two sections forming the other slide D', have slots D³ cut therein, but reversely to
the slot D in the slide D being cut from the opposite side. These two slots D³
extend upwardly the same distance as the slot D2 extends downwards, and the width
of the said slots D³ when united corresponds to the width of the slot D². In the
upper and lower portions of the slides D and D¹ slots F and G are formed, having
projections L on the ends, the depth of the said slots or recesses F and G being equal
to the thickness of the heads of the drum C, under which the said slots fit and have
movement.
The projections L pass up through the openings C³, and are flush with the surfaces
of the heads of the drum.
Suitable packings are applied to all the parts where it is necessary, the heads of the
drum Chaving circular packing C2 placed close to the peripheral edge of the said
drum, which is supported in a groove and rests upon suitable springs. This
circular packing C2 is separated at each of the openings C₁, so that the projections L'
of the piston slides D and D¹, will have an easy passage through the said openings ;

page_text: the top portions of the projections I as well as the peripheral edges of the piston.
slides D and D', are provided with suitable spring-mounted packings M, which are
fitted in suitable grooves in the parts described, having a thin projection extending
into the groove, and the outer portion of packings M being of the same width as the
width of the said parts, the packings on the projections extending outwards flush with
the circular packing 02 and back towards the central part of the drum a sufficient
distance being limited by a shoulder formed on the said projections.
In addition to the packings just described supplementary packings C³ mounted in
like manner are placed just in the rear of the circular packing adjacent to the
openings Con each side to prevent any passage or escapement of the fluid to the
interior of the drum C.
At the upper portion of the curved wall H a packing S is mounted which
prevents any passage of the water around through the upper portion of the shell.
These packings may be of any suitable form of construction and of material adapted
for the purpose.
The above construction having been fully carried out the operation of the device
will be as follows; suitable gearing power being applied to the bevel wheel B¹, the
shaft B and consequently the drum C, will revolve in the direction indicated by the
arrows in Fig. 3. The slides D and D', passing through the slots cut in the drum C
will alternately be pushed through and project from one side of the peripheral of the
said drum as they are brought into contact with the varying curvatures of the
interior wall of the shell A where the drum is in contact with the upper wall A' as
shown, the piston slides are pushed through the drum and come in contact with the
lower wall J until they ride around and strike the short curves K and L when they
will be gradually pushed through the opposite side of the drum, thus at all times
having two ends of the said slides in contact with some portion of the interior wall of
the shell, forming closed compartments between the said wall, the peripheral edge of
the drum and the sides of the projecting slides. The single piston slide D passes
backward and forward through its slot in the drum C, through the slots D³, formed in
the sectional piston slide D. The inside ends of the sections of the slide D¹, in
their reversible sliding movement, strike each other through the slot D2 formed
in the piston slide D, producing the same effect upon each other as the walls of the
shell do upon the slide D. The slots through which these slides work are constructed
of sufficient width to just allow the said slides to pass through them, and as
accurately register with each other, the said slides being constructed, as described, so
as to easily slide into the drum without the use of unnecessary slots; as to the
lower wall J, from the lower portions of the short curves K and L is equally distant
from the central point I, and consequently having the same and equal radii, the slides
between these points will extend outward an equal distance, as they reach the lower
portion of the short curved wall L of greater inclination they will gradually and
smoothly recedé from that side of the drum, and extend outward, from the opposite
side thereof. Therefore the said slides D and D¹, are so mounted in the drum C
that when one side of either piston reaches the lower side of the short wall L, the
other end of the said piston will have just reached the uppermost portion of the
curve of the wall J, thus causing a gradually increasing inclination at one end of
the slides, and a gradual declination at the other end.
As shown in Fig. 1 the pump is illustrated as being set up for raising water
from below the surface of the ground, as the piston slides D and D¹ revolve, a
suction is set up between the rear portion of the said slides and the pipe, and the
water is drawn up into the compartment formed as heretofore described and carried
around the lower portion of the shell and as the slide forming the lower wall of the
said compartment, reaches the lower portion of the short curved wall L of increasing
inclination, the dimensions of the compartment are decreased by the slide gradually
passing through the drum C, and the water forced into and up through the pipe P¹ to
any suitable place of deposit. By the time that the slide just described has reached
the lower portion of the wall L one end of the other slide will have passed the
opening of the pipe P another compartment filled with water is formed, and the

page_text: operation of suction, lifting, and forcing becomes continuous. By having a column
of water behind and resting on each slide, its motion is rendered easy in its passage
backward and forward through the drum C, owing to the equal pressure on each
side of each blade by a column of water above and below the same, the lower
column of water sustaining the pressure by its non compressibility. The parts of the
device will all be constructed of a size proportionate to the desired application and
of metal adapted for the purpose, and formed by means well known in the art; the
dimensions and portions of the inlet and outlet pipes can be altered when used as a
water motor.
It is obvious that many minor details in the construction and arrangement of the
parts could be made and substituted for those shown and described without in the
least departing from the nature and principle of my invention.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I
claim is:-
1. In a rotary pump, or motor the combination of a drum provided with circular
packing on the exterior of its heads, and having diametric right-angled slots there
through, piston slides passing through the said slots of a length equal to the distance,
apart at all points of the wall of the chamber in which the drum is mounted, and a
shell or casing enclosing the said drum, the walls of which form with the drum a
pressure chamber, and also a continuous track from the ends of the piston slides, and
having ingress and egress openings diagonally opposite to each other at or near the
commencement and ending of the said pressure chamber substantially as described.
2. In a rotary pump or motor, the combination of the shell A having an elliptical
chamber provided with ingress and egress openings, drums C, having diametric
slots C, circular packing C², and supplemental packing C³, piston slides D and D¹,
provided with packings M, and means for operating the same, substantially as
described.
3. The general arrangement and construction of the rotary pump or motor as shown
and described.