or Fluids, Air or Gas.
Year: 1885

page_text: or Fluids, Air or Gas.
I ROBERT WAGSTAFF of N° 5 Henry Street Hyde, in the County of Chester,
Engineer, do hereby declare the nature of my invention for AN IMPROVED ROTARY
PUMP, FOR EXHAUSTING, AND FORCING, LIQUIDS OR FLUIDS, AIR OR GAS, to be
as follows:-
My Invention consists of a chamber or Working Barrel, composed of a Cylinder
divided in the centre, and elongated into nearly the form of an Ellipse, the semi-
circumferences are connected together to two flat Plates of the length of the two
half Cylinders, and of a width rather less then the radius of the half Cylinders, (in
place of what would be the sides of least curvature in a true Ellipse) a flat Cover is
fitted to each end of the Working Barrel and provided with Bearings, for two
shafts to work through the centre of the radii of each half Cylinder; fitted on to
each shaft is a Pinion, the same length as the Working Barrel with five Teeth or
Cogs the top and bottom of which are half circular and formed from about equal
Radii, and of a size just sufficient to clear, or quit each other when revolving in the
same direction.
Around these two Pinions are nine Vanes, or Wings, transversly, in the form of
equal sided (truncated) acute angles, the Bases of which are about equal to half the
perpendicular, (before truncation) with a width equal to the length of the Working
Barrel; and of a length to fit into the space between the Pinions and the half
circular portions of the Working Barrel; the Bases are jointed together to form an
endles chain, the outside of the joints of which are formed from the same length of
Radius and made to fit and work into the bottom of the Teeth, or Cogs of both
Pinions; the spaces between the joints are hollowed out to fit and work on to the
top of the Teeth, or Cogs of both Pinions, the truncated ends of the Vanes are left
of sufficient thickness to introduce a Packing, with a spring or springs behind, to
work against the face of the Working Barrel, (or a flexible Packing may be used)
for the purpose of forming and mentaining a tight joint.
When both shafts are put into motion in the same direction the endless Chain
with the Vanes is constantly revolving, also in the same direction, and in passing
from the centre of each flat portion of the Working Barrel to the first two fifths
part of each half circular portion of the same the Tips or truncated ends of the
Vanes are constantly opening, and exhausting; in passing along the central one

page_text: fifth part of each half circular portion the Tips are neither opening, or closing, but
they are carrying forward what has been exhausted; in passing along the last two
fifths part and to the centre of the opposite flat side they are constantly closing,
and forcing, until they overtake each other and meet close or very nearly close
together there are either one or two of the Tips of the Vanes constantly abuting
against the central portion of the flat parts of the Working Barrel, and they are
alternately either two together at the top, and one at the bottom, or they are one
at the top, and two together at the bottom; where only one Vane is in contact
with or abuts against the central portion of the flat side of the Working Barrel it
becomes almost stationary and forms the abutment from which the Tips of the
nearest Vanes are alternately opening and closing; while the Tip of the leading
Vane is opening and advancing towards the half circular portion of the Working
Barrel the Tip of the following Vane is leaving the other half circular portion and
closing against the abutment Vane takes up its position and becoms in its turn
the abutment Vane and so on alternately top and bottom alike or opposite sides
alike.
Two Inlets and two Outlets are required the most suitable and convenient
position to place them is centrally at each joining of the half circular and flat
portions of the Working Barrel leaving a sufficient space in the centre of the flat
portion for abutment.
The two Inlets may be joined into one, and the two Outlets may also be joined
into one by means of suitable passages in the Covers, or outside portion of the
Working Barrel.

page_text: An Improved Rotary Pump for Exhausting and Forcing Liquids
or Fluids, Air or Gas..
I ROBERT WAGSTAFF of 5 Henry Street Hyde in the County of Chester,
Engineer, I do hereby declare the nature of my invention for AN IMPROVED
ROTARY PUMP, 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 of a Chamber or Working Barrel composed of a Cylinder
divided in the centre and elongated into nearly the form of an Ellipse; the semi-
circumferences are connected together to two flat Plates of the length of the two
half Cylinders and of a width about equal to the radius' of the half Cylinders,
(in place of what would be the sides of least curvature in a true Ellipse,) a Cover
is fitted to each end of the Working Barrel and provided with Bearings for the
two shafts to work through the Center of the Radii of each half Cylinder; a loose
Plate can be fitted to the Working Barrel, between one or both ends of the Pinions
and Vanes and one or both Covers, which can be set up with set screws through
the Cover or Covers, or by other means, for the purpose of compensating for end
wear and for forming tight joints at each end of the Pinions and Vanes; on each
shaft is a Pinion the same length as the Working Barrel (less the thickness of the
Packing Plate or Plates when used) with five Teeth or Cogs the top and bottom of
which are half circular and formed from about equal Radii and of a size just
sufficient to clear or quit each other when revolving in the same direction.
Around these two Pinions are nine Vanes or Wings transversly in the form of
equal sided (truncated) acute Angies the Bases of which are about equal to half
the perpendicular (before truncation) with width equal to the length of the Working
Barrel (les the thickness of the Packing Plate or Plates when used) and of a
length to fit into the space between the Pinions, and the half circular portions of
the Working Barrel; the Bases are jointed together to form an endless Chain; the
outside of the joints of which are formed from the same length of Radius and
made to fit and work into the bottom of the Teeth or Cogs of both Pinions the
space between the joints are hollowed out and and made to fit and work on to the
top of the Teeth or Cogs of both Pinions, the truncated ends of the Vanes are left
of a sufficient thickness 'to introduce a Packing with a spring or springs behind to
work against the face of the Working Barrel for the purpose of forming and
mentaining a tight Working joint or Face.
When both shafts are put into motion in the same direction the endless Chain
with the Vanes is constantly revolving also in the same direction and in passing
from the centre of each flat portion of the Working Barrel to the first two fifths
part of each half circular portion of the same, the tips or truncated ends of the
Vanes are constantly opening and exhausting in passing along the central one fifth
part of each half circular portion, the tips are neither opening or closing but they
are carrying forward what has been exhausted in passing along the last two fifths
part and to the centre of the opposite flat side they are constantly closing and

page_text: forcing until they overtake each other and meet cloose or very nearly close together,
there are either one or two of the tips of the Vanes constantly abuting against the
central portion of the flat parts of the Working Barrel and they are alternately
either two together at the top and one at the bottom, or they are one at the top
and two together at the bottom, where only one Vane is in contact with or abuts
against the central portion of the flat side of the Working Barrel, it becomes almost
stationary and forms the abutment from which the tips of the nearest Vanes are
alternately opening and closing. While the tip of the leading Vane is opening and
advancing towards the half circular portion of the Working Barrel, the tip of the
following Vane is leaving the other half circular portion and closing against the
abutment Vane, takes up its position and becoms in its turn the abutment Vane,
and so on alternately top and bottom alike or opposite sides alike.
Two Inlets and two Outlets are required, the most convenient and suitable
position to place them is centrally at the joining of the half circular and flat portions
of the Working Barrel leaving a sufficient space in the centre of the flat portions
for abutment.
The two Inlets may be joined into one and the two outlets may also be joined
into one by means of suitable passages in the Covers or round the outside portions
of the Working Barrel or they may be used seperately as required.
In order that my Invention may be fully understood and readily carried into
effect I proceed to describe the accompanying sheet of Drawings, in each of the
Figures the same Letters of reference refer to the corresponding parts.
Figs 1. to 5. represent the position of the Vanes or Wings during one tenth of a
revolution of the Pinions A is the elongated Cylinder or Working Barrel B.B. are
the Pinions C. to Cs are the Vanes shewn carried forward to a Point in dotted
lines, the travail of the Points is also shewn in dotted lines as indicated by the
arrows.
In Fig. 1. C is the abutment Vane, C¹ is the leading Vane, and C8 is the following
Vane, when the the Pinions are put into motion both in the direction of the arrows
and have advanced one fortieth of a revolution the Vanes will be in the position
shewn in Fig. 2. it will be perceived that the extreem point of the abutment
Vane C. has gone backwards shewing a nodal or stationary Point at a. all the other
Vaues have advanced forward No 4 Vane slightly.
When the Pinions have advanced two fortieth's of a revolution the the Vanes are
in the position shewn in Fig. 3. the Point of the abutment Vane C has gone further
backward stil mentaining the Nodal or stationary Point at A. C' now becomes a
Nodal or stationary Point at a¹ all the other Vanes advancing.
When the Pinions have advanced three fortieths of a revolution, the Vanes will
be in the position shewn in Fig. 4. the Point of the Vane C bas returned back to
its original position and lost its Nodal point which has been previously taken up
by C and mentained, all the other Vanes advancing. When the Pinions have
advanced one tenth of a revolution the Vanes will be in the position shewn in
Fig. 5. the point of the Vane C stil remaining in its original position, the base
having moved one tenth of a revolution of the Pinion, the Vane C4 mentaining its
Nodal Point at a¹ and assumes the position of C at the commencement, but on the
opposite side, and so on alternately, the Nodal Point being the most suitable at
which to truncate the Vanes.
Fig. 6. is a section shewing an arrangement for a Pump with the passages on the
outside of the Working Barrel, passing each other on the top as shewn by the arrows,
the single arrows shew the course on the left side, and the double arrows shew the
course on the right side.
Fig. 7. is a section across the line D F Fig. 6. shewing geer Wheels G which can
be placed in any convenient position. H is a Lubricating Cup in connection with
a cavity centrally in the Neck and the whole length of the Pinion with outlets
opposite to the joints in the Vanes. I. I. shew the Packing Plate between the
cover and the end of the Pinions and Vanes. K K shew the sitting up screws
through the Cover.

page_text: Fig. 8 is a section shewing an arrangement for blowing or exhausting with the
passage across the outside of the Cover the direction is indicated by the arrows.
Fig. 9. is a section down the centre of Fig. 8. this can be driven by two Pulleys
at opposite sides, or by geering as Fig. 7.
Fig's 10. 11. and 12. shew an enlarged Vane with a method of Packing and
Springs both for the Working Face of the Cylinder and also for the joints upon
themselves.
Having now particularly described and ascertained the nature of my Inven-
tion and in what manner the same is to be performed I declare that what
I claim is
1st The Improved Rotary Pump substancially as described.
2nd I wish it to be particularly understood that I claim two Pinions with five
teeth or Cogs in each, and both revolving in the same direction, in combination
with an Endles Chain with nine Vanes or Wings. No other numbers will answer.
Dated this 2nd day of May 1885.