IMPROVEMENTS IN APPARATUS FOR EXHAUSTING, FORCING AND PUMPING GAS, AIR AND OTHER FLUIDS
Year: 1883

page_text: LETTERS PATENT to William Bourne Wright of the Gas Light and Coke
Company's Works, Bromley-by-Bow in the county of Essex, Engineer for an
Invention of "IMPROVEMENTS IN APPARATUS FOR EXHAUSTING, FORCING AND
PUMPING GAS, AIR AND OTHER FLUIDS"
PROVISIONAL SPECIFICATION left by the said William Bourne Wright
at the Office of the Commissioners of Patents on the 30th June 1883.
WILLIAM BOURNE WRIGHT, of the Gas Light and Coke Company's Works,
Bromley-by-Bow, in the County of Essex, Engineer "IMPROVEMENTS IN APPARATUS
FOR EXHAUSTING, FORCING AND PUMPING GAS, AIR AND OTHER FLUIDS
This invention relates to improvements in apparatus for exhausting, forcing and
pumping gas, air and other fluids.
In carrying out my invention as applied to an exhauster for gas, I employ three
or other suitable number of slides or vanes but instead of placing the said slides or
vanes radially as hitherto I place them at an angle or tangentially or nearly so to
the spindle or barrel. The slides or vanes aro actuated by slippers of the usual
construction working in grooves, or by other suitable means my object being to
obtain for the working chamber between any two of the vanes as largo a division
as possible of the circumference of the cylinder or casing at that part which is of
the greatest capacity. I provide the cylinder with relief ports in communication
with the usual ingross and egress ports the said relief ports being so arranged that
when the inlet of gas between any two of the vanes in the position hereinbefore
described, is cut off the outlet relief port is opened whereby I avoid compression of
the air, gas or other fluid which is being forced or exhausted whilst within the
machine. By these means the flow is rendered regular and steady and by the
hereinbefore described arrangement of the slides I dispense with the necessity of
slotting the spindle of the machine as is usually necessary when radial slides are
used, The greater length given to the slides by their tangential position in the
recesses of the barrel or revolving part of the machine renders them steady.
It will be obvious that the improved machine may be used as a motor or rotary
engine to be worked by gas, steam, water or other power or as a pump for gas,
water, oil or other liquids or fluids.
My arrangement of relief ports is applicable to exhausters or apparatus in which
radial slides are employed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Bourne Wright in the Great Seal Patent Office on the
29th December 1883.
WILLIAM BOURNE WRIGHT, of the Gas Light and Coke Company's Works,
Bromley-by-Bow, in.the.county-of-Essex,-Engincer,-"IMPROVEMENTS-IN-APPARATUS
FOR EXHAUSTING, FORCING, AND PUMPING GAS, AIR AND OTHER FLUIDS
This invention relates to improvements in apparatus for exhausting, forcing and
pumping gas, air and other fluids.
In carrying out my invention as applied to an exhauster for gas, I employ three
or other suitable number of slides or vanes but instead of placing the said slides or
vanes radially as hitherto I place them at an angle or tangentially or nearly so to
the spindle or barrel. The slides or vanes are actuated by slippers of the usual
construction working in grooves, or by other suitable means, my object being to
obtain for the working chamber between any two of the vanes as large a division
as possible of the circumference of the cylinder or casing at that part which is of
the greatest capacity. I provide the cylinder with relief ports in communication
with or forming the usual ingress and egress ports, the said relief ports being so
arranged that when the inlet of gas between any two of the vanes in the position
hereinbefore described is cut off the outlet relief port is opened whereby I avoid
compression of the air, gas or other fluid which is being forced or exhausted whilst
within the machine.
In order to enable my invention to be fully understood I will proceed to describo
the same by reference to the accompanying drawing in which figure 1, is a
transverse section and figure 2, a longitudinal section of an apparatus for
exhausting, forcing aud pumping gas, air and other fluids constructed according to
my invention; figure 3, is a transverse section shewing the relief ports placod at
equal height and figures 4, and 5, are a part transverse section and part elevation
showing my arrangement of relief ports applied to an ordinary gas exhauster.
Similar letters in all the figures represent similar parts.
In the arrangement shewn in figures 1, and 2, a is the main cylinder of the
apparatus; b, is the excentric spindle or barrel; c, c, c, are the slides or vanes
placed tangentially, or nearly so, to the spindle or barrel b; d, d, d, are ordinary
slippers or segments working in grooves e; f. f. f, are the usual tongue pieces on
the slides or vanes c,; 9, g', are the relief ports with which I provide the cylinder,
the relief port g, forming the inlet port and the relief port g₁, the outlet port.
By means of an apparatus constructed with relief ports as herein before described
the flow of air, gas or other fluid is rendered regular and steady and the oscillation
of the machine reduced to a minimum and by the herein before described arrange-
ment of the slides or vanes c, I dispense with the necessity of slotting the spindlo
or barrel b, of the machine right through, or of employing spacing pins or the like
as is usually necessary when radial slides are used. The greater length given to
the slides c, by their tangential position in the recesses of the barrel or revolving
part b, of the machine renders them steady.
The arrangement of apparatus shewn in figure 3, is substantially the same as
that shown in figures 1, and 2, except that the relief ports g, and g' are placed at
the same height.
Figures 4, and 5, shew a suitable manner of applying my relief ports to
existing apparatus. For this purpose I provide the cylinder with a jacket h,
on each side; these jackets which form the relief ports are in communication
with the ordinary inlet and outlet ports and with the cylinder as shown. It will

page_text: be understood that instead of employing a jacket for the relief ports as just
described a pipe or pipes may be used
My arrangement of relief ports is applicable to exhausters or apparatus in which
radial slides are employed and my arrangement of tangential slides or vanes is
applicable to existing exhausters or apparatus.
Having thus described my invention and the best means I am acquainted with
for carrying the same into effect I wish it to be understood that what I claim is :-
Firstly. Providing apparatus for exhausting, forcing and pumping gas, air and
other fluids with relief ports as and for the purposes hereinbefore describod.
Secondly. Placing the slides or vanes of apparatus for exhausting, forcing and
pumping gas, air and other fluids tangentially, or nearly so, to the spindle of the
apparatus substantially in the manner and for the purposes hereinbefore described
and represented in figures 1, 2, and 3, of the accompanying drawing.
Thirdly. The improved apparatus for exhausting, forcing and pumping gas, air
and other fluids as hereinbefore described and represented in the several figures of
the accompanying drawing.
In Witness whereof I the said William Bourne Wright have hereto set my
hand and seal this twenty fourth day of December, in the year of our Lord one
thousand eight hundred and eighty three