IMPROVEMENTS IN ROTARY PUMPS AND EXHAUSTERS
Year: 1884

page_text: I JOHN HENRY STOREY of 37 Farringdon Street in the City of London,
Engineer, do hereby declare the nature of my said Invention for IMPROVEMENTS
IN ROTARY PUMPS AND EXHAUSTERS to be as follows :--
The object of my invention is to provide a simple and efficient form of rotary
pump for water, oil, gas and other fluids; applicable also as an exhauster.
I form the body of the pump cylindrical, with flanges and covers, and with the
usual induction and eduction ports.
An axle passes through one or both covers, and upon this axle, inside the
cylinder, is fitted a small cylinder, about half the diameter of the larger cylinder,
but I do not confine myself to any particular relative diameters. This arrangement
leaves an annular space between the two cylinders. A portion of this aunular
space is filled up with a solid block with the ends sloped off to fine edges. The
inner cylinder is capable of being revolved, and is made to form a close joint,
practically fluid tight, against the fixed block.
The internal cylinder is fitted with a sliding piston of the same length as the
cylinder. This piston passes through a slot in the internal cylinder, its transverse
length being equal to the diameter of the small cylinder plus the width of the
annular space.
When the axle, with the small cylinder and piston fitted thereto, rotate together,
the piston is moved in the slot by the wedge form of one end of the block, while
the other wedge of the same block permits the piston to traverse the annular space
and touch the inner surface of the cylinder, in contact with which it performs half
a revolution or thereabouts.
By applying power to the driving axle water, or other fluid is drawn through
one of the ports, (which for the time being becomes the induction port) and is
driven through the opposite port (which thus becomes the eduction or delivery
port).
No valves are required to the ports, and the several parts are made to a
mechanical fit, provision in some cases being made for taking up wear to prevent
leakage
My said invention may be used as a pump, blower or exhauster, for water, oil,
air, gas or other fluid.

page_text: COMPLETE SPECIFICATION.
I, JOHN HENRY STOREY, of 37 Farringdon Street, in the City of London,
Engineer, do hereby declare tho nature of my said Invention for "IMPROVEMENTS
IN ROTARY PUMPS AND EXHAUSTERS" and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
The object of my invention is to provide a simple and efficient form of Rotary
pump for water, oil, gas and other fluids; applicable also as an exhaustèr.
and with the
I form the body of the pump cylindrical, with flanges and covers,
usual induction and eduction ports. An axle passes through one or both of the
covers, and upon this axle, inside the cylinder, is fitted a small cylinder, about half
the diameter of the larger cylinder, but I do not confine myself to any particular
relative diameters. This arrangement leaves an annular space between the two
cylinders. A portion of this annular space is filled up with a solid block with the
ends sloped off to fine edges, or the outer case may be so formed. The inner
cylinder is capable of being revolved, and is made to form a close joint, practically
fluid-tight against the fixed block, or equivalent provisions.
The internal cylinder is fitted with a sliding piston of the same length as tho
cylinder. This piston passes through a slot in the internal cylinder, its transverse
length being equal to the diameter of the small cylinder plus the width of the
annular space.
When the axle, with the small cylinder and piston fitted thereto, rotate together,
the piston is moved in the alot by the wedge form of one end of the block, while.
the other wedge of the same blocks permits the piston to traverse the annular space
and touch the inner surface of the cylinder, in contact with which it performs half
a revolution or thereabouts.
By applying power to the driving axle water, or other fluid, is drawn through
one of the ports (which for the time being becomes the induction port) and is
drivon through the opposite port (which thus becomes the eduction or delivery
port).
No valves are required to the ports, and the several parts are made to a
mechanical fit, provision in some cases being made for taking up wear to prevent
lenkago.
My said invention may be used as a pump, blower or exhaustor, for water, oil,
gas or other fluid.
And in order that my said invention may be particularly described and
ascertained, reference is hereby made to the accompanying drawings in which
similar lotters of reference indicate corresponding parts.
1
Fig. 1 is an elevation with the outer cover ġ removed to shew the internal
mechanism, and Fig. 2 is a section, on the line 1-2: of Figail, but with the covor g
in its place.. is, tho outer cylinder or case. A portion of this cylinder is bored
to a large diameter, and another portion to a smaller diameter, as shown in Fig. 1.
The union of the two diameters is comploted by means of the curved portions ff.
This form of the cylinder may be obtained by constructing the same of the full
diameter and inserting a block of the form of f'hf, as shewn in Fig. 1. b is the

page_text: internal cylinder, having a projection 61 working in the cover g.--The piston i may
be divided into two parts, pressed outwards by spiral, or other springs l, or it may be
formed in one piece and the springs dispensed with. Rollers k may also be inserted
at the outer ends of the piston or pistons to reduce the friction. c is the shaft,
passing through the cover e and fitted with a stuffing box d.
The cylinder b has a slot across its diameter extending from b' to 6', in which the
piston slides to and fro', being actuated by the curved surfaces f.
The piston and the ports are so arranged that when the piston is in a vertical
position, both the parts m m (shewn by dotted lines) are closed, and one port
cannot be uncovered until the other portion of the piston has passed its port.
In using my said invention as a pump, the shaft c is driven by any suitable
power, and one of the ports m m will be the induction port, and the other the
eduction port, as will be readily understood, and when using it as a motor, steam,
water, air, or other fluid may enter by either of the passages n m and pass outwards
by the other.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. The manufacture and use of rotary pumps and exhausters constructed,
arranged and operating substantially as herein before described, and shewn on the
drawings.
2. The general construction and arrangement of the several and respective parts
together forming my improvements in rotary pumps and exbausters, substantially
as herein before described and shewn on the drawings.