Improvements in Rotary Pumps and Rotary Blowers, and; Exhausters.
Year: 1892

page_text: Date of Application, 6th Feb., 1892
Complete Specification Left, 26th Oct., 1892-Accepte!, 10th Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Rotary Pumps and Rotary Blowers, and;
Exhausters.
I, EDWARD BARNES, of No. 44 Villa Road, Handsworth, in the County of
Stafford, Mechanical Engineer do hereby declare the nature of this invention to be
as follows:-
My invention consists in constructing and arranging the parts of rotary pumps
and rotary blowers and exhausters in the manner hereinafter described, whereby
great simplicity in construction and efficiency in action are secured.
I will describe my improvements in connection with a pump for raising liquids.
The shaft carrying the eccentric rotates in a cylindrical chamber the said
chamber constituting a race in which the eccentric works. On the shaft or axis of
the pump I fix an eccentric sheave having a strap with connecting rod to the lower
end of which connecting rod a crosshead is jointed. All these parts are rectangular
in cross section and of equal thickness, the connecting rod where jointed to the
crosshead having its sides countersunk to receive the crosshead jaws. The internal
radius of the said cylinder is equal to that of the outside of the eccentric strap
plus the eccentricity. The ends of the said cylinder or cylindrical chamber are
flat and are bored to receive the shaft carrying the eccentric sheave. The sheave
is secured, circumferentially to the shaft by a feather and radially by springs. The
eye in the sheave through which the shaft passes is oblong to permit of inward
radial movement against the resistance of the springs in case of obstruction. I do
not limit myself to the use of springs for the purpose described as under ordinary
conditions the sheave may be bored to fit the shaft and secured only by a feather
or key. Leading from the circumference outwards and having its centre line at
right angles to the axis of the cylinder is a parallel rectangular opening, extending
the whole length of the cylinder and of sufficient width to allow of the vibrations
of the eccentric rod. The crosshead fits and slides in the said rectangular opening.
From one side of this opening, in the plane of rotation and so situated between
the crosshead and circumference of the cylinder as not to become obstructed by
the motion of the crosshead is a branch pipe leading at right angles to the suction
or exhaust; and on the opposite side, in the same plane, is a semi-circular port or
passage by which communication is made from the suction or exhaust through the
rectangular opening, past the crosshead, to the interior of the cylinder excepting
when the crosshead is out to the fullest extent of its stroke, when the crosshead
blocks the passage and thereby prevents communication between the suction and
delivery ports or passages as the eccentric rod vibrates across the rectangular
opening.
The two openings described become respectively suction and delivery passages at
discretion by rotating the shaft in one or other direction.
By mounting two or more of the eccentrics described and their accessories on the
shaft and dividing the cylindrical chamber by diaphragms, several pumps may be
worked from the same shaft.
The application of my improvements to rotary blowers and to exhausters
differs in no essential respect from their application to a rotary pump as herein
before described.
Dated the 6th day of February 1892.
W. T. WHITEMAN,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Rotary Pumps and Rotary Blowers and
Exhausters.
I, EDWARD BARNES, of No. 44 Villa Road, Handsworth, in the County of
Stafford, Mechanical Engineer, do hereby declare the nature of my invention and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
My invention consists in constructing and arranging the parts of rotary pumps
and rotary blowers and exhausters in the manner hereinafter described, whereby
great simplicity in construction and efficiency in action are secured.
On the
I will describe my improvements in connection with a pump for raising liquids.
The shaft carrying the eccentric or sheave rotates in a cylindrical chamber, the
said chamber constituting a race in which the eccentric or sheave works.
eccentric or sheave is a strap with connecting rod to the lower end of which con-
necting rod a crosshead is jointed. All these parts are rectangular in cross section
and of equal thickness, the connecting rod where jointed to the crosshead having
its sides countersunk to receive the crosshead jaws. The internal radius of the
said cylinder is equal to that of the outside of the eccentric strap, plus the
eccentricity. The ends of the said cylinder or cylindrical chamber are flat and are
bored to receive the shaft carrying the eccentric sheave. The eccentric sheave is
secured circumferentially to the shaft by a feather and radially by springs. The
eye in the sheave through which the shaft passes is oblong to permit of inward
radial movement against the resistance of the springs in case of obstruction. I do
not limit myself to the use of springs for the purpose described as under ordinary
conditions the sheave may be bored to fit the shaft and secured only by a feather
or key. Leading from the circumference outwards and having its centre line at
right angles to the axis of the cylinder is a parallel rectangular opening constituting
the suction pipe of the pump, extending the whole length of the cylinder and of
sufficient width to allow of the vibrations of the eccentric rod. The crosshead fits
and slides in the said rectangular opening. From one side of this opening, in the
plane of rotation and so situated between the crosshead and circumference of the
cylinder as not to become obstructed by the motion of the crosshead, is a branch
pipe leading at right angles to the suction and on the opposite side, in the same
plane, is a semi-circular port or passage by which communication is made through
the rectangular opening or suction pipe past the crosshead, to the interior of the
cylinder excepting when the crosshead is out to the fullest extent of its stroke,
when the crosshead blocks the passage and thereby prevents communication between
the suction and delivery ports or passages as the eccentric rod vibrates across the
rectangular opening or suction passage.
The two openings described become respectively suction and delivery passages at
discretion by rotating the shaft in one or other direction.
By mounting two or more of the eccentrics described and their accessories on
the shaft and dividing the cylindrical chamber by diaphragms several pumps may
be worked from the same shaft.
The application of my improvements to rotary blowers and to exhausters differs
in no essential respect from their application to a rotary pump as hereinbefore
described.
Figures 1 and 2 of the accompanying drawings represent vertical sections, taken
in planes at right angles to one another, of a double rotary pump constructed
according to my invention, the two pumps being arranged side by side and worked
from the same shaft, but the shaft may work a single pump only, or more than two
pumps arranged side by side. Figure 1 represents the essential parts of one only
of the pumps. As the two pumps are alike in construction and action I will describe

page_text: one pump only, the corresponding parts of each pump being marked with the same
letters of reference.
a is the shaft carrying the eccentric or sheave (or sheaves), the said shaft
turning in bearings at a², a² at the opposite sides of the divided cylindrical chamber
or case c, the diaphragm between the two pumps being marked . The cylindrical
chamber e constitutes a race in which the eccentric sheave works. The eccentric
sheave bis connected circumferentially to the shaft a by the feather g and radially
by the springs h, h, the said springs being situated in boxes in the sheave. It will
be seen by an examination of Figure 1 that the eye k in the sheave b, through
which the shaft a passes is oblong to permit of inward movement of the said shaft
against the resistance of the said springs in case of obstruction.
These springs may however be omitted and the sheave be bored to fit the shaft
as seen in the modified pump hereinafter described.
Working on the eccentric sheave b is a strap d with connecting rod d². The
internal radius of the cylinder e is equal to that of the outside of the eccentric
strap d plus the eccentricity. To the lower end of the said rod d2 a cross head e is
jointed at e. The connecting rod d² and cross head e are rectangular in cross
section and of the same thickness (see Figure 2) the connecting rod 2 where it is
jointed to the crosshead e having its sides countersunk to receive the cross head
jaws (see Figure 2): is the radial rectangular passage opening from and
extending the whole length of the cylindrical chamber c, and of sufficient width to
allow of the vibrations of the eccentric rod 2 (see Figure 1). In the said radial
rectangular passage or opening the cross head e fits and slides, the passage or
opening i constituting the suction pipe of the pump; is the delivery pipe situated
at right angles to the cross head passage and suction pipe i. Opposite the delivery
pipe and in the same plane is a semi-circular port or passage m by which com-
munication is made from the exhaust passage or pipe i past the crosshead e, to the
interior of the cylinder c excepting when the cross head e is at the end of its
outward stroke as seen in Figure 1 in which case the said cross head e blocks the
passage or suction pipe i and prevents communication between it and the delivery
pipe and cylinder c as the rod d² vibrates across the said passage or suction
pipe i.
In the double pump represented, the eccentric sheaves on the shaft a are opposite
to one another (see Figure 2) by which arrangement a uniform flow of water or
liquid is maintained and the parts balanced.
When three or other larger number of pumps are worked from the same shaft,
the eccentric sheaves are arranged to produce a uniform or nearly uniform flow of
water or liquid and balance each other.
The action of the pump is as follows. By the rotation of the shaft with eccentric
sheave the suction side of the cylindrical chamber c is increased in capacity and
water rises into it, while the other or delivery side of the said cylindrical chamber
is reduced in capacity and water forced from it through the delivery pipe and an
intermittent current of water or liquid passes through the pump from the suction
pipe or passage i through the delivery pipe l. The eccentric sheaves of the two
pumps being arranged in the manner hereinbefore described, the combined inter-
mittent currents produces a practically uniform current of liquid.
Figures 3 and 4 represent vertical sections taken in planes at right angles to one
another of a modification of the double pump last described in which modification
the suction and delivery pipes are in the same line or both horizontal.
In the modified pump Figures 3 and 4, indicates the suction pipe and the
delivery pipe. The other parts are marked with the same letters as corresponding
parts in Figures 1 and 2.
Figure 5 represents a plan of the double pump Figures 3 and 4 already described
and Figure 6 represents a horizontal section of the same.
The action of the modified pump differs in no essential respect from the double
pump Figures 1 and 2 first described.

page_text: The pumps described may be used as rotary blowers and exhausters by being
worked at the required speed.
Having now particularly described and ascertained the nature of my invention
and the manner in which the same is to be performed I declare that I claim as
my invention of "
Improvements in rotary pumps and rotary blowers and
.exhausters "
:-
The combination in a rotary pump, blower or exhauster of an eccentric sheave
mounted upon a shaft situated concentrically in a cylindrical chamber, the said
eccentric sheave having a strap and connecting rod the latter being jointed to a
crosshead working in a radial passage opening into the said cylindrical chamber the
rotation of the eccentric sheave drawing a current of liquid, air or gas into the
said chamber at one side and forcing a current of liquid, air or gas at the other
side of the said chamber, the shaft being made to work one, two or more eccentric
sheaves which with the appendages hereinbefore described constitute one, two or
more pumps, blowers or exhausters either having separate suction and delivery
pipes or common suction and delivery pipes the several parts being constructed,
arranged and acting substantially as hereinbefore described and illustrated in the
accompanying drawings.
Dated the Twenty-second day of October 1892,